EP0688491B1 - Electronic security system with novel electronic t-handle lock - Google Patents
Electronic security system with novel electronic t-handle lock Download PDFInfo
- Publication number
- EP0688491B1 EP0688491B1 EP94911454A EP94911454A EP0688491B1 EP 0688491 B1 EP0688491 B1 EP 0688491B1 EP 94911454 A EP94911454 A EP 94911454A EP 94911454 A EP94911454 A EP 94911454A EP 0688491 B1 EP0688491 B1 EP 0688491B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- key
- lock
- bolt
- data
- bolt cam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/21—Individual registration on entry or exit involving the use of a pass having a variable access code
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00571—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by interacting with a central unit
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/27—Individual registration on entry or exit involving the use of a pass with central registration
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B5/00—Handles completely let into the surface of the wing
- E05B5/003—Pop-out handles, e.g. sliding outwardly before rotation
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
- G07C2009/00412—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks the transmitted data signal being encrypted
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
- G07C2009/0042—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks the transmitted data signal containing a code which is changed
- G07C2009/00428—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks the transmitted data signal containing a code which is changed periodically after a time period
- G07C2009/00468—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks the transmitted data signal containing a code which is changed periodically after a time period after n uses
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
- G07C2009/0042—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks the transmitted data signal containing a code which is changed
- G07C2009/00476—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks the transmitted data signal containing a code which is changed dynamically
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00761—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by connected means, e.g. mechanical contacts, plugs, connectors
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00857—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys where the code of the data carrier can be programmed
- G07C2009/0088—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys where the code of the data carrier can be programmed centrally
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/08—With time considerations, e.g. temporary activation, valid time window or time limitations
Definitions
- This invention relates generally to security systems comprising a lock, and more particularly to electronic security systems for money-containing devices such as pay telephones, vending machines, bill changers or the like, which must be periodically accessed by a collector in order to retrieve the funds accumulated in the device.
- money-containing devices such as pay telephones, vending machines, bill changers or the like
- a collector should remove a locked coin box from the device and replace it with an empty lock box to which he does to have access.
- a removed coin box will not be replaced with another lock box but rather will be replaced with an unlocked receptacle which can be later removed by that collector before turning in his key at the end of the collection shift.
- US-A-5,140,317 discloses the features of the precharacterising portion of claim 1.
- US-A-5,038,588 discloses a T-handle lock assembly.
- This invention is a security system, comprising a lock, said lock including: a bolt movable between a locked position and an unlocked position; a bolt cam contacting said bolt and moving said bolt between said locked position and said unlocked position through rotation of said bolt cam; characterised by a shaft means selectively engageable with said bolt cam for rotating said bolt cam; plug means connected to said shaft means for rotating said shaft means, said plug means having a keyway for insertion of key means for rotating said plug means; solenoid means for drawing said shaft means into active engagement with said bolt cam upon energization of said solenoid means so that said bolt cam may be rotated by said shaft means; and access means for selectively energizing said solenoid means; wherein said shaft means is passively engaged with said bolt cam so as to rotate without rotating said bolt cam when said solenoid means is not energized.
- the shaft means includes a projection on an end thereof
- said bolt cam includes a channel within which said projection rotates without engaging said bolt cam when said shaft means is passively engaged with said bolt cam
- said bolt cam further includes a teardrop slot within which said projection engages said bolt cam for rotating said bolt cam when said shaft means is actively engaged with said bolt cam.
- the access means comprises means for receiving data from said key means, means for determining whether data received from said key means is authorized data, and means for energizing said solenoid mean when data received from said key means is determined to be authorized data.
- the securing system further comprises an extension rod; an elongated housing assembly for housing therein said extension rod, said bolt, said bolt cam, said shaft means, said solenoid means and said plug means; and a front handle coupled to said elongated housing assembly and having a recess formed therein, said access means being located within said recess.
- said key means includes a handheld computer including means for storing encoded data, and an internal circuit board installed within said handheld computer for interfacing said handheld computer with said access means, including means for decoding said encoded data stored in said handheld computer into decoded data and means for generating said specific data for transmission to said access means based on said decoded data.
- the security system further comprises a key device coupled to said internal circuit board via an I/O port of said handheld computer, said key device being insertable into said plug means and providing operative power to said lock from said handheld computer, and providing data from said lock to said handheld computer.
- said lock is installed in a vending machine having internal memory circuitry which stores inventory information therein; said lock further comprising interface means for coupling said access means with said internal memory circuitry, said access means reading said inventory information from said internal memory circuitry and transmitting said inventory information to said handheld computer through said key means.
- said key means includes a key having a data contact
- said plug means includes a terminal for contacting said data contact of said key through which said inventory information is transmitted to said memory means of said electronic key means.
- the preferred embodiment of the present invention can provide an electronic security system which overcomes the problems mentioned above and significantly reduces collection costs, which can eliminate the requirement of costly re-keying in the event of a key loss; and which can substantially eliminate the possibility of internal fraud and theft.
- Figures 1A and 1B illustrate an electronic key 100.
- the key has a key body 101 which contains logic and power transfer circuitry, and a key blade 102 with appropriately cut key bits for operating pin tumblers as is known in the art.
- the key 100 also carries a spring loaded data and power electrical contact 103, which is made of a suitable material and is preferably gold plated.
- Portable battery and logic housing 104 contains a battery power supply and electronic circuitry, a battery charging port 105, a wrist strap or belt clip 106, and a plug-connected cable 107 for transferring power and data signals between the housing 104 and the key body 101.
- Figure 1B is an end view of the key body showing the orientation of the spring loaded contact 103 with relation to the key blade 102.
- the key 100 and connected housing 104 with their components are portable and are referred to as "key means”.
- FIG. 2 illustrates a lock cylinder and bolt mechanism included in a housing 201 (with its cover removed).
- a bolt 202 operated by a lock cylinder 203 containing a key cylinder plug 204 having a keyway 205 for key blade 102, and an electrical contact 206 which makes contact with the power and data contact 103 of the key body when the key blade 102 is inserted into the key blade opening 205.
- a bolt cam 207 is rotated by the lock cylinder 203 to move the bolt 202 between the locked position shown and an unlocked position in which the bolt is withdrawn downward to be substantially within the housing 201.
- the lock housing 201 further includes electronic logic circuitry 208 and an electrically powered solenoid 209.
- Solenoid 209 includes a spring biased bolt blocking plunger 210 which, when extended, prevents bolt 202 from being withdrawn by the bolt cam into the housing 201 to its unlocked position.
- bolt blocking plunger 210 is retracted toward the solenoid to enable the key 100 to be turned in the clockwise direction which rotates bolt cam 207 against the bolt 202 and causes the movement of the bolt 202 downward into the housing 201.
- Figure 3 illustrates a programmer for writing data into and reading data from the circuitry in key body 104 through cable 107.
- the programmer includes a host computer 301 which may be a minicomputer, personal computer, or any other type of computer, but which preferably is an IBM® compatible microcomputer.
- a key programmer interface unit 302 is connected to the computer 301 by means of a cable 303 which plugs into a communication port of the computer 301.
- the programmer interface unit 302 contains a key receptacle 304 having electrical contacts into which the plug end of the key cable 107 is inserted after being disconnected from key body 101 to allow the computer to write into the memory within key housing 104.
- the computer 301 is loaded with a software program 305 for loading and retrieving files from the key logic housing 104.
- FIG. 4 illustrates a portable programmer interface unit 401 including a modem which enables the portable programmer interface unit 401 to communicate with the computer 301 through the public switched telephone network (PSTN) via a standard phone jack 402.
- PSTN public switched telephone network
- An operator in the field needing to update the contents of files in the key housing 104 would dial up the host computer using a standard phone set 403 which is connectable via a jack to the programmer interface 401.
- the programmer interface unit 401 operates in the same manner as the office programmer interface unit 302.
- FIG. 5 is a schematic block diagram illustrating the components within the electronic key housing 104.
- the components include a microcontroller or microprocessor 501, an electrically erasable programmable read only memory (EEPROM) 502 coupled to the controller 501, an oscillator or clock 503 which provides clock signals for the operation of controller 501, and a battery power source 504 which operates the controller 501 as well as the solenoid 209 and the circuitry 208 within the lock mechanism housing 201.
- the electronic key components further include an electronic switch 505 operated by the controller 501 and a power sensing circuit 506.
- FIG. 6 is a schematic block diagram of the electronic circuitry 208 within the lock housing 201.
- This circuitry includes a microprocessor 601, an EEPROM 602 coupled to the microprocessor 601, an oscillator or clock 603 for providing operational clock signals to the microprocessor 601, a power filter 604, electronic switch 605 and load 606 for transmission of signals to the key controller 501 via line 607, and an electronic switch 608 for allowing power to flow from power source 504 within the key housing 104 through cable 107 and contacts 103-206 through the solenoid 209 to ground to activate the solenoid.
- FIG. 7 is a schematic diagram of the electronic key programmer interface unit 302. It is noted that the portable key programmer interface unit 401 contains substantially the same components as the programmer 302, in addition to the modem and telephone jack not shown.
- the programmer interface unit 302 includes a microcontroller 701, a clock oscillator 702, an electronic switch 703 and load 704 combination which operate similarly to the switch 605 and load 606, a power supply 705, and a standard RS-232 receiver and driver 706 which couples the programmer interface unit 302 to the host computer 301.
- the electronic key 100 is inserted into the key programmer interface unit 302 or 401 to be programmed by the host computer running the customized software application 305 via cable 107 as described above.
- the EEPROM 502 is loaded with data corresponding to a specific collection route.
- the data can be entered manually through a keyboard provided with the host computer 301, or the data can be transferred to the EEPROM 502 from files on a floppy disk inserted into a standard floppy disk drive of the computer 301.
- EEPROM 502 is loaded with specially encrypted data corresponding to specific ID codes stored in each of the electronic lock memories 602 of the locks on the specific collection route. Data encryption is performed by an encryption algorithm in a known manner. EEPROM 502 also is loaded with the date of key programming, the start date as of which the key is valid, and a time window during which the key can be used, for example, 24, 48 or 72 hours from the start date. EEPROM 502 also contains an address location storing the particular key category, for example, whether the key is a collection key or service key, and a serial number for key identification. The data is encrypted using a specific algorithm performed by the software 305.
- the computer 301 may also print out the particular collection route, lock key codes, time window, and start date for confirmation by the programmer.
- Controller 501 keeps track of the current time and date by counting the clock inputs of oscillator 503 and using the key programming date as a reference.
- the data is written into EEPROM 502 through switching of electronic switch 703 by microcontroller 701 which serves to increase and decrease the amount of power consumed by the load 703 which in turn provides the logic levels for binary "1" and "0" digital communication to the microcontroller 501.
- This increase and decrease in power is sensed by the power sense circuit 506 and is converted into digital signals readable by the microcontroller 501.
- the lock mechanism microprocessor 601 is coupled to EEPROM memory 602 which stores a specific ID code for that specific lock.
- EEPROM memory 602 which stores a specific ID code for that specific lock.
- the lock mechanism of Figure 2 contains no power supply itself but is completely powered by the power source 504 of the electronic key 100.
- Power filter 604 is provided to supply power to the logic circuits from the key 100 over line 607, the power filter smoothing the voltage waveform so that power interruptions caused by data transmission over line 607 will not affect the operation of the logic circuits.
- a solenoid activation switch 609 can be mechanically coupled to the bolt blocking plunger 210 of Figure 2 to detect the retraction of the bolt blocking plunger.
- activation switch 609 can be used to send an alarm to the host computer when switch 609 detects the retraction of the bolt blocking plunger in the absence of generation of an enable signal by the microprocessor 601, which would be indicative of someone tampering with the lock by trying to manually pry the bolt blocking plunger away from bolt 202.
- An additional line 611 may be provided to establish communication between the lock microprocessor and the smart terminal 610.
- the use of a smart telephone terminal 610 also allows the use of a host confirmation feature.
- Part of the data stored in the key memory 502 is the key's particular serial number.
- the host computer 301 would dial up the smart terminal 610 via a modem and transmit a host confirmation message to the microprocessor 601.
- the message may instruct the microprocessor to allow the solenoid 209 to be powered by any mechanically operable key inserted into the key slot 205, may instruct the microprocessor 601 to prevent any key at all from operating the lock by prohibiting powering of the solenoid 209, or may instruct the microprocessor 601 to allow only a key having a particular serial number, transmitted by the host computer, to operate the lock by powering the solenoid.
- the host confirmation data may then be stored in the memory 602 coupled to the microprocessor 601.
- microprocessor 601 After the key blade 102 is inserted into the keyway 205 and the contact 103 is electrically coupled to the key cylinder contact 206, the electronic lock logic circuitry is powered up or awakened at step 801.
- microprocessor 601 communicates with the microcontroller 501 to read the data stored in the memory 502.
- microprocessor 601 checks whether the current date stored in memory 502 is after the start date written into memory 502 during the programming mode of the key, determines whether the current time read from memory 502 is within the time window stored in memory 502 which has been programmed by the host computer in advance.
- step 809 the microprocessor 601 is reset, and no further action is taken. If the time and date data is valid, the microprocessor 601 proceeds to step 804 in which the list of ID codes stored in key memory 502, corresponding to the locks that key 100 is to operate on this particular collection route, is compared with the current ID code stored in the memory 602. If the ID code in memory 602 is contained in the list stored in memory 502, the process proceeds to step 805 in which the presence of a host confirmation feature is checked. If not, the microprocessor proceeds to step 809.
- microprocessor 601 calculates a new ID code according to a prestored algorithm in memory 602, encrypts the new ID code and stores it in memory 602, replacing the previous ID code stored therein.
- microprocessor 601 transmits a signal to electronic switch 608 which allows power to flow from power source 504 through solenoid 209, and causes bolt blocking plunger 210 to retract in the direction toward the solenoid 209 for a predetermined period of time such as 5 seconds. At this time, the operator may turn the key body 101 and unlock the bolt. The microprocessor 601 then resets before the key body 101 is withdrawn from the insert slot 205. After the bolt is relocked, the bolt blocking plunger 210 moves back to its blocking position shown in Figure 2 by spring bias action.
- step 805 determines whether the coin telephone is one equipped with a smart terminal. If the coin telephone is one equipped with a smart terminal, processing proceeds from step 805 to step 808. In this step, microprocessor 601 determines whether the key serial number matches the serial number transmitted from the host computer, or whether the host computer has sent a message to prevent all keys from operating. If the key data matches the data stored in the memory 602, processing proceeds to step 806 as described above. If the key data does not match, or microprocessor 601 has received a prohibit message, processing proceeds to step 809.
- each lock may write its serial number and current time into a specific location of the memory 502 of the key in the event that all key data is valid to indicate that the specific lock was operated at the particular time stored with the serial number.
- the key may be re-inserted into the programmer interface unit 302 and the files in memory 502 read by the host computer in order to maintain a list of the locks that were operated as well as those that were not operated.
- each of the lock microprocessors 601 are stored in the host computer 301 such that after the key is returned at the end of a collection cycle, the key may be reprogrammed with the new ID codes currently being stored in each of the operated locks, while the ID codes for the locks that have not been operated are left unchanged within the key memory 502.
- Fig. 9 illustrates a programmer 301a, which may be similar to the microcomputer programmer 301 of Fig. 3.
- the programmer 301a includes a CPU 901, a pair of look-up tables 902 and 903, and a daykey encrypter 904.
- Look-up table 902 contains a listing of various IDNs (identification numbers) and IDKs (encryption key codes) for each lock of the system. Every lock is identified by a lock identification number or IDN, and has associated therewith a corresponding encryption key code IDK which is used by the lock to encrypt data.
- IDNs identification numbers
- IDKs encryption key codes
- Look-up table 903 contains a listing of various IDNs and IDKs for each key unit 104a of the system. Each key unit 104a is also identified by a key IDN and has associated therewith a corresponding encryption key code IDK which is used by the key unit to encrypt data.
- Daykey encrypter 904 contains an arbitrary encryption key code which is changed daily in the programmer 301a (thus the designation "daykey").
- Key unit 104a includes a key module 906, a handheld computer 908, and optionally a modem 910.
- the module 906 interfaces the handheld computer 908 to the key device 101.
- Handheld computer 908 is a commercially available device such as a Panasonic Model JT-770, and may be implemented by any other equivalent apparatus.
- the computer 908 includes a key memory 502 which stores route stop information programmed from the programmer 301a. The route stop information is organized into a route table containing specific routes labeled by date.
- the key interface module 906 includes the IDN and IDK for the key unit 104a.
- route stops for each collector are compiled by the programmer 301a. These route stops may be selected by a management operator, or may be downloaded into the programmer 301a from a central host management system.
- the programmer 301a compiles a set of locks which are to be serviced for collection (or other operations) by reading out a number of IDNs and associated IDKs of the locks to be accessed by the particular key unit 104a, from the look-up table 902, to thereby generate a route table for transmission to the key unit 104a.
- the IDNs and IDKs of the various locks are encrypted by the encrypter 904 using the particular daykey encryption key code in use on that day.
- the daykey encryption key code is then itself encrypted using the IDK encryption key code of the specific key unit 104a for which the route table is being compiled.
- the encrypted daykey denoted as DAYKEY(IDK) is then also transmitted to the computer 908 of key unit 104a.
- the IDN identification number and IDK encryption key code are stored in the key interface module 906, while the encrypted daykey DAYKEY(IDK) and the encrypted route tables are stored in the key memory 502 of handheld computer 908.
- the lock memory 602 contains the IDN or lock identification number of that particular lock, the IDK encryption code associated with that particular lock, and an arbitrary seed number.
- the seed number is simply a certain numerical value, the actual value of which is not relevant.
- the handheld computer 908 sends the encrypted daykey to the key interface module 906, which decrypts the DAYKEY(IDK) using its encryption key code IDK to obtain the decrypted daykey.
- the encrypted IDNs and IDKs are then sent to the module 906 to be decrypted using the daykey, and used by the module 906 in the verification process with the lock.
- This feature is intended as an additional security measure to achieve an even higher level of security, for the reason that the module 906 is an add-on feature to the computer 908 and is removable therefrom.
- the module 906 is an add-on feature to the computer 908 and is removable therefrom.
- neither the module nor the handheld computer can be used for access to any information with respect to lock ID codes or encryption key codes.
- the daykey encryption code is periodically changed in the programmer, the particular daykey stored in the module 906 is of limited use.
- the lock Upon insertion of the key 101 into the keyway of the lock at step 1001, power is applied to the lock at step 1201.
- the lock sends a handshake protocol to the key, which receives the handshake at step 1002 and sends an acknowledge to the lock at step 1003.
- the lock recognizes the acknowledge and sends its IDN to the key at step 1204.
- the key receives the lock IDN and acknowledges at steps 1004 and 1005, and checks to see whether the lock's IDN exists in memory for the presently valid route table at step 1006.
- the route tables are labeled by date, and the computer 908 includes a clock for keeping track of the current date.
- the key checks to see if the lock's corresponding IDK is found in memory for the particular IDN sent by the lock and acknowledges the lock if both IDN and IDK have been found, at step 1008.
- the lock Upon receiving the acknowledge at step 1205, the lock sends the seed number from memory 602 to the key at step 1206.
- the key acknowledges receipt of the seed number at step 1010, and the lock then encrypts the seed number with its IDK at step 1208 upon receiving the acknowledge at step 1207.
- the key also encrypts the seed number from the lock at step 1011, using the IDK found for the IDN received from the lock.
- the key sends the encrypted seed number to the lock, which receives it at step 1209.
- the lock compares the encrypted seed number received from the key with the encrypted seed number which the lock itself generated, at step 1210. If the numbers match, the key is determined to be authorized to access the lock.
- the key writes the encrypted seed number into the memory 602 over the old seed number. The encrypted seed number will be used as the new seed number for the next access request from a key.
- the lock sends an acknowledge to the key to inform it of a successful access request, and activates the solenoid at step 1213. The lock then resets at step 1214. If any of the acknowledges from the key are not received within a predetermined amount of time, the lock routine also advances immediately to step 1214 for reset.
- the key unit Upon receiving the acknowledge from the lock at step 1013, the key unit writes the date of access into the route table at step 1014, over the IDK previously stored there. As such, the key unit will thereafter not be able to access the lock without being reprogrammed by the programmer 301a. Such can be accomplished either by bringing the key unit 104a back to the management center, or by calling into the programmer via modem 910 for reprogramming in the field.
- the key unit then proceeds to step 1015 where it is reset for the next lock access attempt.
- the key unit may be programmed to have a set number of accesses to each lock before requiring reprogramming. Such is shown in Fig. 10A, wherein a counter is incremented at step 1014a, and the value stored in the counter is compared with a preset maximum number of accesses at step 1014b. If this number has been reached, the lock IDK is replaced by the date of access and the key unit is reset at steps 1014c and 1015; otherwise the key unit is immediately reset at step 1014d. In either event, additional access to the lock may be denied upon an attempted access to another lock.
- Fig. 13 illustrates an electronic security system relating to T-handle lock type vending machines such as snack and beverage machines, newspaper machines, gaming devices such as slot machines, stand alone lottery machines, money loaders for ATMs (automated teller machines), and transit system farecard machines.
- a portable, conventional handheld computer (HHC) 1301 is provided with an internal circuit board or option card 1310, having a CPU, memory and associated firmware or software.
- the option card is installed either as a built-in daughter board or may be inserted into an existing option slot in the HHC 1301, and communicates with the CPU 1325 of the HHC through an interface bus 1320.
- the option card 1310 of Fig. 13 replaces the add-on module 906 of the security system of Fig. 9 and generally performs the same functions as the module 906. As such, further description of the operation of the option card 1310 will be omitted to eliminate repetition.
- the HHC 1301 is connectable to a host management system 1304 through an interface 1305.
- An electronic key device 1302 is connected to the HHC 1301 through an input/output (I/O) port 1330 of the HHC.
- the option card 1310 communicates with electronic T-lock device 1340 of vending machine 1303 through the I/O port 1330 of the HHC, to transfer decrypted ID code data therebetween and thus provide access to the vending machine.
- Key device 1302 is similar to key device 101 of Fig. 1A.
- the HHC 1301 is used to access vending machine 1303.
- the vending machine includes a novel electronic T-lock device 1340 (to be described in detail below).
- the electronic T-lock device 1340 communicates with the HHC 1301 via the key device 1302, which supplies power to the T-lock device.
- Electronic T-lock device 1340 also communicates with electronic coin vending circuitry 1350 through optocoupler interface 1360.
- the electronic coin vending circuitry 1350 includes a memory for maintaining information regarding the amount of money deposited in the vending machine, inventory information relating to the different types and quantities of merchandise sold and still on hand, and other pertinent information relating to the operation of the vending machine.
- the electronic coin vending circuitry 1350 is conventionally known in the art and for this reason will not be further described.
- the optocoupler interface consists of LED and optotransistor circuitry and is also well known in the art.
- the optocoupler interface 1360 enables existing vending machines to be retrofitted with novel electronic T-lock devices 1340 by providing isolation coupling between the existing coin vending circuitry and the T-lock device, to avoid any possible damage due to voltage incompatibility between the components.
- the optocoupler interface 1360 allows inventory data to be transferred from the vending machine circuitry 1350 to the handheld computer 1301 where it is stored in memory. While optocoupling circuitry is used in one design of security system, it is noted that other types of interfacing including hardwiring may be used in the invention with equivalent function.
- One advantage lies in the ability of the HHC 1301 to download inventory data from the vending machine 1303 by simply inserting the key device 1302 into the T-lock device 1340.
- the T-lock will retrieve inventory data from the vending circuity 1350 and transfer it to the HHC 1301.
- Service personnel may then read the inventory information from the HHC display, allowing the servicer to determine the quantities and types of inventory that require restocking in the vending machine, without requiring the servicer to open the machine to either access the coin vending circuitry, or to visually inspect the inventory, thus saving considerable time and enhancing convenience.
- the inventory data may also be uploaded to the host management system 1304 along with the route collection data as described previously, for use by management.
- the access protocols between the HHC 1301 and the T-lock device 1340 are the same as shown in Figs. 10 and 12.
- Fig. 14 illustrates a mechanical T-lock assembly which is used in conjunction with an embodiment of a security system comprising a lock, in particular a T-lock device, of the present invention.
- the mechanical aspects of the T-lock assembly are disclosed in U.S. Patent 5,038,588.
- a locking mechanism 30 having a bolt 18 is mounted within a cylinder/extension rod housing 22.
- a threaded extension rod 20 is mounted in the housing at the other end thereof and is secured within the housing by means of a head 48 and teeth 58 which mate with corresponding cam means in the end of the housing 22.
- the lock assembly of Fig. 14 is shown in its unlocked position in which bolt 18 is retracted from engagement with an opening 44 a hollow shank portion 46 in T-handle housing unit 16.
- Bolt 18 is engageable with opening 44 through an aperture 42 in the cylinder/extension rod housing 22.
- spring 60 forces the end of the housing 22 into engagement with the teeth 58.
- Front handle 15 thus pops out of its nested position within housing 16 and allows the extension rod 20 to be unscrewed from its complementary threaded section within the vending machine.
- the T-lock device 1340 is mounted within a door or access panel of the machine or box with which it is associated, and thus unscrewing of the extension rod 20 allows the interior of the vending machine or other type of box to be accessed.
- Key device 1302 is inserted into a keyway of locking mechanism 30 and is turned in order to retract bolt 18 from engagement with opening 44.
- Fig. 16 illustrates the constituent parts of the novel electronic T-lock device and the locking mechanism 30 of an embodiment of the present invention.
- Bolt 18 is mounted in bolt housing 1640.
- the bolt 18 may be a spring-loaded bolt or a deadbolt.
- Bolt 18 includes a channel 181 and a cam slot 182 as shown in Figs. 17E and 17F.
- Bolt cam 1630 is mounted within bolt housing 1640, and includes a cam pin 1631 which engages within the channel 181 and rests within slot 182 as the bolt 18 is being retracted through rotation of the key.
- Figs. 17C and 17D respectively show a front and rear view of the bolt cam 1630.
- bolt cam 1630 includes a teardrop slot 1632, and a 180° slot 1633.
- the bolt cam 1630 is engaged by shaft 1622 of armature 1623.
- Shaft 1622 has a projection 1625 at the end thereof adjacent the bolt cam 1630.
- the shaft 1622 and projection 1625 fit into the teardrop slot of the bolt cam 1630.
- the armature 1623 is mounted within solenoid 1620, and is normally biased toward the bolt cam by a spring 1624.
- Spring 1624 forces the shaft 1622 fully within the bolt cam so that the projection 1625 is located within 180° slot 1633.
- the other end of the shaft 1622 is slotted along the edge thereof; this slot engages with chamfer 1615 of plug assembly 1610, as shown in Fig. 17B.
- Plug assembly 1610 has a keyway 1613 and a data contact terminal 1614 at the front end thereof, as shown in Fig.
- a 180° channel 1612 is provided on the back end of plug assembly 1610. This channel interacts with a roll pin 59 which projects into the interior of housing 22 when the plug assembly is mounted therein.
- An alignment slot 1501 is provided in opening 1510 of front handle 15, as shown in Fig. 15, to ensure that the plug assembly, and thus projection 1625, is properly aligned with the teardrop slot 1632, by requiring the keyway 1613 to be aligned with the alignment slot 1501 in order for the key device 1302 to be inserted into the keyway.
- Tabs on the end of housing 22 engage with a vertical slot in front handle 15, and the housing 22 is rigidly secured to the front handle by means of a set screw 1503 which is threaded through thread hole 1504 in handle 15.
- the electronic lock circuit as shown in Fig. 6 is formed on an IC chip 1502 which is mounted within a hollowed out section of front handle 15.
- Wire contacts 1611 connect the data/power contact terminal 1614 to the IC chip 1502 and power terminals 1621 connect the solenoid 1620 to the IC chip 1502. Additional wiring (not shown) connects the IC chip to the optocoupler interface 1360.
- the solenoid 1620 In operation, when the solenoid 1620 is unenergized, the spring 1623 forces the projection 1625 into the 180° slot 1633 of the bolt cam. Thus, insertion of a key or other instrument in keyway 1613 will allow the plug assembly 1610 and armature 1623 to be freely rotated 180° without engaging the bolt cam to retract the bolt 18.
- the lock circuit Upon the proper transfer of decrypted ID code data from the HHC to the lock circuit 1502, the lock circuit allows power to be transmitted to the solenoid 1620, drawing the armature 1623 in toward the solenoid. In this position, the projection 1625 engages with the teardrop slot 1632, and rotation of the key 1302 will thus rotate the bolt cam 1630 causing the bolt 18 to retract and providing access to the vending machine.
- T-lock assembly uses a threaded extension rod, this is not critical to the operation of the invention, and other equivalent attachment mechanisms for securing the T-lock to the housing enclosure such as ratchets, latches, pins, etc. may be used equivalently according to the invention.
Abstract
Description
- This invention relates generally to security systems comprising a lock, and more particularly to electronic security systems for money-containing devices such as pay telephones, vending machines, bill changers or the like, which must be periodically accessed by a collector in order to retrieve the funds accumulated in the device.
- Typically, the collection of money from coin or currency operated devices such as pay telephones, transit system fair car machines or the like is a costly and burdensome operation. For instance, a company may own tends or even hundreds of thousands of pay telephones for which tens or hundreds of thousands of keys must be kept in order to prevent the loss of a key from requiring the changing of locks on thousands of keys must be kept in order to prevent the loss of a key from requiring the changing of locks on thousands of devices which would operate with the lost key.
- Another problem involved with the collecting of funds from currency operated devices is the possibility of fraud or theft by a collector. Typically, a collector should remove a locked coin box from the device and replace it with an empty lock box to which he does to have access. However, it is possible that a removed coin box will not be replaced with another lock box but rather will be replaced with an unlocked receptacle which can be later removed by that collector before turning in his key at the end of the collection shift.
- Yet another cost involved in the collection process is the sheer manpower required for the task of distributing, collecting, and keeping track of many thousands of keys on a daily basis.
- Although electronic security systems are known and have been used for various purposes, see e.g. US Patents 4,789,859, 4,738,334, 4,697,171, 4,438,426, applicants are unaware of any which specifically address the problems noted above.
- US-A-5,140,317 discloses the features of the precharacterising portion of claim 1.
- US-A-5,038,588 discloses a T-handle lock assembly.
- This invention is a security system, comprising a lock, said lock including: a bolt movable between a locked position and an unlocked position; a bolt cam contacting said bolt and moving said bolt between said locked position and said unlocked position through rotation of said bolt cam; characterised by a shaft means selectively engageable with said bolt cam for rotating said bolt cam; plug means connected to said shaft means for rotating said shaft means, said plug means having a keyway for insertion of key means for rotating said plug means; solenoid means for drawing said shaft means into active engagement with said bolt cam upon energization of said solenoid means so that said bolt cam may be rotated by said shaft means; and access means for selectively energizing said solenoid means; wherein said shaft means is passively engaged with said bolt cam so as to rotate without rotating said bolt cam when said solenoid means is not energized.
- Preferably, the shaft means includes a projection on an end thereof, said bolt cam includes a channel within which said projection rotates without engaging said bolt cam when said shaft means is passively engaged with said bolt cam, and said bolt cam further includes a teardrop slot within which said projection engages said bolt cam for rotating said bolt cam when said shaft means is actively engaged with said bolt cam.
- Preferably the access means comprises means for receiving data from said key means, means for determining whether data received from said key means is authorized data, and means for energizing said solenoid mean when data received from said key means is determined to be authorized data.
- Preferably, the securing system further comprises an extension rod; an elongated housing assembly for housing therein said extension rod, said bolt, said bolt cam, said shaft means, said solenoid means and said plug means; and a front handle coupled to said elongated housing assembly and having a recess formed therein, said access means being located within said recess.
- Preferably said key means includes a handheld computer including means for storing encoded data, and an internal circuit board installed within said handheld computer for interfacing said handheld computer with said access means, including means for decoding said encoded data stored in said handheld computer into decoded data and means for generating said specific data for transmission to said access means based on said decoded data.
- Advantageously the security system further comprises a key device coupled to said internal circuit board via an I/O port of said handheld computer, said key device being insertable into said plug means and providing operative power to said lock from said handheld computer, and providing data from said lock to said handheld computer.
- Preferably said lock is installed in a vending machine having internal memory circuitry which stores inventory information therein; said lock further comprising interface means for coupling said access means with said internal memory circuitry, said access means reading said inventory information from said internal memory circuitry and transmitting said inventory information to said handheld computer through said key means.
- Advantageously said key means includes a key having a data contact, and said plug means includes a terminal for contacting said data contact of said key through which said inventory information is transmitted to said memory means of said electronic key means.
- The preferred embodiment of the present invention can provide an electronic security system which overcomes the problems mentioned above and significantly reduces collection costs, which can eliminate the requirement of costly re-keying in the event of a key loss; and which can substantially eliminate the possibility of internal fraud and theft.
- The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and are not limitative of the present invention, and wherein:
- Figures 1A and 1B are side and end elevational views, respectively, of an electronic key with its own power supply for use with a security system, comprising a lock, according to one preferred embodiment of the present invention;.
- Figure 2 is a front elevation view of a lock cylinder and associated mechanisms (shown with the housing cover removed) for operation with the key of Figures 1A and 1B;
- Figure 3 is a schematic view of a first electronic key programmer for use with the security system according to an embodiment of the present invention;
- Figure 4 is a schematic view of another portable key programmer for use with the security system according to an embodiment of the present invention;
- Figure 5 is a schematic block diagram of the circuit elements of the electronic key of Figure 1A;
- Figure 6 is a schematic block diagram of the electronic components of the lock mechanism of Figure 2;
- Figure 7 is a schematic block diagram of the electronic key programmer of Figures 3 and 4;
- Figure 8 is an operational flow chart diagram of the operation of an electronic lock mechanism in accordance with an embodiment of the present invention;
- Figure 9 is a schematic block diagram of a further electronic key programmer and electronic key unit for use with the security system according to an embodiment of the present invention;
- Figure 10 is a flow chart diagram of the operation of the
key unit 104a of Figure 9; - Figure 10a is a flow chart diagram of an alternatively routine
for
step 1014 of Figure 10; - Figure 11 is a block diagram of the contents of a
lock memory 602 of the program and unit of Figure 9; - Figure 12 is a flow chart diagram of the operation of the lock unit of Figure 2;
- Figure 13 is a block diagram of an electronic security system incorporating a lock according to an embodiment of the invention, relating to T-handle type vending machines;
- Figure 14 is a partly cross sectional side view of a T-handle lock assembly incorporating a lock according to an embodiment of the invention;
- Figure 15 is a front view of the
cylinder front handle 15 of Fig. 14; - Figure 16 is an exploded partly cross sectional side view of a cylinder front handle, cylinder/extension rod housing subassembly, and bolt release assembly according to a security system comprising a lock in accordance with an embodiment of the invention; and
- Figure 17A is a front view of
plug assembly 1610 of Fig. 16; - Figure 17B is a rear view of
plug assembly 1610; - Figure 17C is a front view of
bolt cam 1630 of Fig. 16; - Figure 17D is a rear view of
bolt cam 1630; - Figure 17E is a front view of
bolt 18 of Fig. 16; and - Figure 17F is a side view of
bolt 18. -
- Figures 1A and 1B illustrate an
electronic key 100. - The key has a
key body 101 which contains logic and power transfer circuitry, and akey blade 102 with appropriately cut key bits for operating pin tumblers as is known in the art. Thekey 100 also carries a spring loaded data and powerelectrical contact 103, which is made of a suitable material and is preferably gold plated. - Portable battery and
logic housing 104 contains a battery power supply and electronic circuitry, abattery charging port 105, a wrist strap orbelt clip 106, and a plug-connectedcable 107 for transferring power and data signals between thehousing 104 and thekey body 101. - Figure 1B is an end view of the key body showing the orientation of the spring loaded
contact 103 with relation to thekey blade 102. The key 100 and connectedhousing 104 with their components are portable and are referred to as "key means". - Figure 2 illustrates a lock cylinder and bolt mechanism included in a housing 201 (with its cover removed). Within the housing is a
bolt 202 operated by alock cylinder 203 containing akey cylinder plug 204 having akeyway 205 forkey blade 102, and anelectrical contact 206 which makes contact with the power anddata contact 103 of the key body when thekey blade 102 is inserted into the key blade opening 205. - A
bolt cam 207 is rotated by thelock cylinder 203 to move thebolt 202 between the locked position shown and an unlocked position in which the bolt is withdrawn downward to be substantially within thehousing 201. Thelock housing 201 further includeselectronic logic circuitry 208 and an electrically poweredsolenoid 209. Solenoid 209 includes a spring biasedbolt blocking plunger 210 which, when extended, preventsbolt 202 from being withdrawn by the bolt cam into thehousing 201 to its unlocked position. Upon operation of thesolenoid 209,bolt blocking plunger 210 is retracted toward the solenoid to enable thekey 100 to be turned in the clockwise direction which rotatesbolt cam 207 against thebolt 202 and causes the movement of thebolt 202 downward into thehousing 201. - Figure 3 illustrates a programmer for writing data into and reading data from the circuitry in
key body 104 throughcable 107. The programmer includes ahost computer 301 which may be a minicomputer, personal computer, or any other type of computer, but which preferably is an IBM® compatible microcomputer. A keyprogrammer interface unit 302 is connected to thecomputer 301 by means of acable 303 which plugs into a communication port of thecomputer 301. Theprogrammer interface unit 302 contains akey receptacle 304 having electrical contacts into which the plug end of thekey cable 107 is inserted after being disconnected fromkey body 101 to allow the computer to write into the memory withinkey housing 104. Thecomputer 301 is loaded with asoftware program 305 for loading and retrieving files from thekey logic housing 104. - Figure 4 illustrates a portable programmer interface unit 401 including a modem which enables the portable programmer interface unit 401 to communicate with the
computer 301 through the public switched telephone network (PSTN) via astandard phone jack 402. - An operator in the field needing to update the contents of files in the
key housing 104 would dial up the host computer using astandard phone set 403 which is connectable via a jack to the programmer interface 401. Once communication with thehost computer 301 is established, the programmer interface unit 401 operates in the same manner as the officeprogrammer interface unit 302. - Figure 5 is a schematic block diagram illustrating the components within the
electronic key housing 104. The components include a microcontroller ormicroprocessor 501, an electrically erasable programmable read only memory (EEPROM) 502 coupled to thecontroller 501, an oscillator orclock 503 which provides clock signals for the operation ofcontroller 501, and abattery power source 504 which operates thecontroller 501 as well as thesolenoid 209 and thecircuitry 208 within thelock mechanism housing 201. The electronic key components further include anelectronic switch 505 operated by thecontroller 501 and apower sensing circuit 506. - Figure 6 is a schematic block diagram of the
electronic circuitry 208 within thelock housing 201. This circuitry includes amicroprocessor 601, anEEPROM 602 coupled to themicroprocessor 601, an oscillator orclock 603 for providing operational clock signals to themicroprocessor 601, apower filter 604,electronic switch 605 and load 606 for transmission of signals to thekey controller 501 via line 607, and anelectronic switch 608 for allowing power to flow frompower source 504 within thekey housing 104 throughcable 107 and contacts 103-206 through thesolenoid 209 to ground to activate the solenoid. - Figure 7 is a schematic diagram of the electronic key
programmer interface unit 302. It is noted that the portable key programmer interface unit 401 contains substantially the same components as theprogrammer 302, in addition to the modem and telephone jack not shown. Theprogrammer interface unit 302 includes amicrocontroller 701, a clock oscillator 702, anelectronic switch 703 and load 704 combination which operate similarly to theswitch 605 andload 606, apower supply 705, and a standard RS-232 receiver anddriver 706 which couples theprogrammer interface unit 302 to thehost computer 301. - The operation of the system components will now be described with reference to Figures 5-7.
- The
electronic key 100 is inserted into the keyprogrammer interface unit 302 or 401 to be programmed by the host computer running the customizedsoftware application 305 viacable 107 as described above. - Using the example of a lock for pay telephones for illustration, the
EEPROM 502 is loaded with data corresponding to a specific collection route. The data can be entered manually through a keyboard provided with thehost computer 301, or the data can be transferred to theEEPROM 502 from files on a floppy disk inserted into a standard floppy disk drive of thecomputer 301. -
EEPROM 502 is loaded with specially encrypted data corresponding to specific ID codes stored in each of theelectronic lock memories 602 of the locks on the specific collection route. Data encryption is performed by an encryption algorithm in a known manner.EEPROM 502 also is loaded with the date of key programming, the start date as of which the key is valid, and a time window during which the key can be used, for example, 24, 48 or 72 hours from the start date.EEPROM 502 also contains an address location storing the particular key category, for example, whether the key is a collection key or service key, and a serial number for key identification. The data is encrypted using a specific algorithm performed by thesoftware 305. - The
computer 301 may also print out the particular collection route, lock key codes, time window, and start date for confirmation by the programmer. -
Controller 501 keeps track of the current time and date by counting the clock inputs ofoscillator 503 and using the key programming date as a reference. - The data is written into
EEPROM 502 through switching ofelectronic switch 703 bymicrocontroller 701 which serves to increase and decrease the amount of power consumed by theload 703 which in turn provides the logic levels for binary "1" and "0" digital communication to themicrocontroller 501. This increase and decrease in power is sensed by thepower sense circuit 506 and is converted into digital signals readable by themicrocontroller 501. - Referring now to Figure 6, the
lock mechanism microprocessor 601 is coupled toEEPROM memory 602 which stores a specific ID code for that specific lock. One important feature is that the lock mechanism of Figure 2 contains no power supply itself but is completely powered by thepower source 504 of theelectronic key 100.Power filter 604 is provided to supply power to the logic circuits from the key 100 over line 607, the power filter smoothing the voltage waveform so that power interruptions caused by data transmission over line 607 will not affect the operation of the logic circuits. - As an additional security feature, a
solenoid activation switch 609 can be mechanically coupled to thebolt blocking plunger 210 of Figure 2 to detect the retraction of the bolt blocking plunger. In telephones equipped with a so-called "Smart Terminal" orcircuit board 610, which is provided with a modem to link the telephone to the host computer over a telephone line,activation switch 609 can be used to send an alarm to the host computer whenswitch 609 detects the retraction of the bolt blocking plunger in the absence of generation of an enable signal by themicroprocessor 601, which would be indicative of someone tampering with the lock by trying to manually pry the bolt blocking plunger away frombolt 202. Anadditional line 611 may be provided to establish communication between the lock microprocessor and thesmart terminal 610. - The use of a
smart telephone terminal 610 also allows the use of a host confirmation feature. - Part of the data stored in the
key memory 502 is the key's particular serial number. Using the host confirmation feature, thehost computer 301 would dial up thesmart terminal 610 via a modem and transmit a host confirmation message to themicroprocessor 601. The message may instruct the microprocessor to allow thesolenoid 209 to be powered by any mechanically operable key inserted into thekey slot 205, may instruct themicroprocessor 601 to prevent any key at all from operating the lock by prohibiting powering of thesolenoid 209, or may instruct themicroprocessor 601 to allow only a key having a particular serial number, transmitted by the host computer, to operate the lock by powering the solenoid. The host confirmation data may then be stored in thememory 602 coupled to themicroprocessor 601. - Referring now to Figure 8, the overall operation of the electronic lock system will be described.
- After the
key blade 102 is inserted into thekeyway 205 and thecontact 103 is electrically coupled to thekey cylinder contact 206, the electronic lock logic circuitry is powered up or awakened atstep 801. At step 802,microprocessor 601 communicates with themicrocontroller 501 to read the data stored in thememory 502. Atstep 803,microprocessor 601 checks whether the current date stored inmemory 502 is after the start date written intomemory 502 during the programming mode of the key, determines whether the current time read frommemory 502 is within the time window stored inmemory 502 which has been programmed by the host computer in advance. If the start date read from the key memory is subsequent to the current date read from the key memory, or if the current time is outside of the time window stored in the key memory, the microprocessor advances to step 809 at which the key is determined to be invalid, themicroprocessor 601 is reset, and no further action is taken. If the time and date data is valid, themicroprocessor 601 proceeds to step 804 in which the list of ID codes stored inkey memory 502, corresponding to the locks that key 100 is to operate on this particular collection route, is compared with the current ID code stored in thememory 602. If the ID code inmemory 602 is contained in the list stored inmemory 502, the process proceeds to step 805 in which the presence of a host confirmation feature is checked. If not, the microprocessor proceeds to step 809. If the telephone is not equipped with asmart terminal 610, processing proceeds to step 806 in whichmicroprocessor 601 calculates a new ID code according to a prestored algorithm inmemory 602, encrypts the new ID code and stores it inmemory 602, replacing the previous ID code stored therein. Atstep 807,microprocessor 601 transmits a signal toelectronic switch 608 which allows power to flow frompower source 504 throughsolenoid 209, and causesbolt blocking plunger 210 to retract in the direction toward thesolenoid 209 for a predetermined period of time such as 5 seconds. At this time, the operator may turn thekey body 101 and unlock the bolt. Themicroprocessor 601 then resets before thekey body 101 is withdrawn from theinsert slot 205. After the bolt is relocked, thebolt blocking plunger 210 moves back to its blocking position shown in Figure 2 by spring bias action. - If the coin telephone is one equipped with a smart terminal, processing proceeds from
step 805 to step 808. In this step,microprocessor 601 determines whether the key serial number matches the serial number transmitted from the host computer, or whether the host computer has sent a message to prevent all keys from operating. If the key data matches the data stored in thememory 602, processing proceeds to step 806 as described above. If the key data does not match, ormicroprocessor 601 has received a prohibit message, processing proceeds to step 809. - As an additional feature, each lock may write its serial number and current time into a specific location of the
memory 502 of the key in the event that all key data is valid to indicate that the specific lock was operated at the particular time stored with the serial number. Upon return of the key to the central office, the key may be re-inserted into theprogrammer interface unit 302 and the files inmemory 502 read by the host computer in order to maintain a list of the locks that were operated as well as those that were not operated. All of the algorithms utilized by each of thelock microprocessors 601 are stored in thehost computer 301 such that after the key is returned at the end of a collection cycle, the key may be reprogrammed with the new ID codes currently being stored in each of the operated locks, while the ID codes for the locks that have not been operated are left unchanged within thekey memory 502. - Description will now be made of a second design of a security system with reference to Figs. 9-12.
- Fig. 9 illustrates a
programmer 301a, which may be similar to themicrocomputer programmer 301 of Fig. 3. Theprogrammer 301a includes aCPU 901, a pair of look-up tables 902 and 903, and adaykey encrypter 904. Look-up table 902 contains a listing of various IDNs (identification numbers) and IDKs (encryption key codes) for each lock of the system. Every lock is identified by a lock identification number or IDN, and has associated therewith a corresponding encryption key code IDK which is used by the lock to encrypt data. - Look-up table 903 contains a listing of various IDNs and IDKs for each
key unit 104a of the system. Eachkey unit 104a is also identified by a key IDN and has associated therewith a corresponding encryption key code IDK which is used by the key unit to encrypt data. -
Daykey encrypter 904 contains an arbitrary encryption key code which is changed daily in theprogrammer 301a (thus the designation "daykey"). -
Key unit 104a includes akey module 906, ahandheld computer 908, and optionally amodem 910. Themodule 906 interfaces thehandheld computer 908 to thekey device 101.Handheld computer 908 is a commercially available device such as a Panasonic Model JT-770, and may be implemented by any other equivalent apparatus. Thecomputer 908 includes akey memory 502 which stores route stop information programmed from theprogrammer 301a. The route stop information is organized into a route table containing specific routes labeled by date. Thekey interface module 906 includes the IDN and IDK for thekey unit 104a. - In operation, route stops for each collector are compiled by the
programmer 301a. These route stops may be selected by a management operator, or may be downloaded into theprogrammer 301a from a central host management system. For eachkey unit 104a, which is identified by a particular key module IDN and corresponding encryption key code IDK, theprogrammer 301a compiles a set of locks which are to be serviced for collection (or other operations) by reading out a number of IDNs and associated IDKs of the locks to be accessed by the particularkey unit 104a, from the look-up table 902, to thereby generate a route table for transmission to thekey unit 104a. - The IDNs and IDKs of the various locks are encrypted by the
encrypter 904 using the particular daykey encryption key code in use on that day. The daykey encryption key code is then itself encrypted using the IDK encryption key code of the specifickey unit 104a for which the route table is being compiled. The encrypted daykey, denoted as DAYKEY(IDK), is then also transmitted to thecomputer 908 ofkey unit 104a. - In the
key unit 104a, the IDN identification number and IDK encryption key code are stored in thekey interface module 906, while the encrypted daykey DAYKEY(IDK) and the encrypted route tables are stored in thekey memory 502 ofhandheld computer 908. - Referring now to Figure 11, the
lock memory 602 contains the IDN or lock identification number of that particular lock, the IDK encryption code associated with that particular lock, and an arbitrary seed number. The seed number is simply a certain numerical value, the actual value of which is not relevant. - In order for the encrypted IDNs and IDKs of the route tables stored in
memory 502 to be decrypted, thehandheld computer 908 sends the encrypted daykey to thekey interface module 906, which decrypts the DAYKEY(IDK) using its encryption key code IDK to obtain the decrypted daykey. The encrypted IDNs and IDKs are then sent to themodule 906 to be decrypted using the daykey, and used by themodule 906 in the verification process with the lock. - This feature is intended as an additional security measure to achieve an even higher level of security, for the reason that the
module 906 is an add-on feature to thecomputer 908 and is removable therefrom. Thus, in the event that the module is lost or stolen, neither the module nor the handheld computer can be used for access to any information with respect to lock ID codes or encryption key codes. Further, since the daykey encryption code is periodically changed in the programmer, the particular daykey stored in themodule 906 is of limited use. - Operation of the security system will now be described with reference to the flow chart diagrams of Figs. 10, 10A and 12.
- Upon insertion of the key 101 into the keyway of the lock at
step 1001, power is applied to the lock atstep 1201. Atstep 1202, the lock sends a handshake protocol to the key, which receives the handshake atstep 1002 and sends an acknowledge to the lock atstep 1003. Atstep 1203, the lock recognizes the acknowledge and sends its IDN to the key atstep 1204. The key receives the lock IDN and acknowledges atsteps step 1006. As previously mentioned, the route tables are labeled by date, and thecomputer 908 includes a clock for keeping track of the current date. - At
step 1007, if the IDN is found, the key checks to see if the lock's corresponding IDK is found in memory for the particular IDN sent by the lock and acknowledges the lock if both IDN and IDK have been found, atstep 1008. Upon receiving the acknowledge atstep 1205, the lock sends the seed number frommemory 602 to the key atstep 1206. The key acknowledges receipt of the seed number atstep 1010, and the lock then encrypts the seed number with its IDK atstep 1208 upon receiving the acknowledge atstep 1207. - The key also encrypts the seed number from the lock at
step 1011, using the IDK found for the IDN received from the lock. Atstep 1012, the key sends the encrypted seed number to the lock, which receives it atstep 1209. The lock then compares the encrypted seed number received from the key with the encrypted seed number which the lock itself generated, atstep 1210. If the numbers match, the key is determined to be authorized to access the lock. Atstep 1211, the key writes the encrypted seed number into thememory 602 over the old seed number. The encrypted seed number will be used as the new seed number for the next access request from a key. Atstep 1212, the lock sends an acknowledge to the key to inform it of a successful access request, and activates the solenoid atstep 1213. The lock then resets at step 1214. If any of the acknowledges from the key are not received within a predetermined amount of time, the lock routine also advances immediately to step 1214 for reset. - Upon receiving the acknowledge from the lock at
step 1013, the key unit writes the date of access into the route table atstep 1014, over the IDK previously stored there. As such, the key unit will thereafter not be able to access the lock without being reprogrammed by theprogrammer 301a. Such can be accomplished either by bringing thekey unit 104a back to the management center, or by calling into the programmer viamodem 910 for reprogramming in the field. - The key unit then proceeds to step 1015 where it is reset for the next lock access attempt.
- In an alternative mode of operation, the key unit may be programmed to have a set number of accesses to each lock before requiring reprogramming. Such is shown in Fig. 10A, wherein a counter is incremented at step 1014a, and the value stored in the counter is compared with a preset maximum number of accesses at
step 1014b. If this number has been reached, the lock IDK is replaced by the date of access and the key unit is reset atsteps step 1014d. In either event, additional access to the lock may be denied upon an attempted access to another lock. - Fig. 13 illustrates an electronic security system relating to T-handle lock type vending machines such as snack and beverage machines, newspaper machines, gaming devices such as slot machines, stand alone lottery machines, money loaders for ATMs (automated teller machines), and transit system farecard machines.
- A portable, conventional handheld computer (HHC) 1301 is provided with an internal circuit board or
option card 1310, having a CPU, memory and associated firmware or software. The option card is installed either as a built-in daughter board or may be inserted into an existing option slot in theHHC 1301, and communicates with theCPU 1325 of the HHC through aninterface bus 1320. Theoption card 1310 of Fig. 13 replaces the add-onmodule 906 of the security system of Fig. 9 and generally performs the same functions as themodule 906. As such, further description of the operation of theoption card 1310 will be omitted to eliminate repetition. TheHHC 1301 is connectable to ahost management system 1304 through aninterface 1305. An electronickey device 1302 is connected to theHHC 1301 through an input/output (I/O)port 1330 of the HHC. Theoption card 1310 communicates with electronic T-lock device 1340 ofvending machine 1303 through the I/O port 1330 of the HHC, to transfer decrypted ID code data therebetween and thus provide access to the vending machine.Key device 1302 is similar tokey device 101 of Fig. 1A. - The
HHC 1301 is used to accessvending machine 1303. The vending machine includes a novel electronic T-lock device 1340 (to be described in detail below). The electronic T-lock device 1340 communicates with theHHC 1301 via thekey device 1302, which supplies power to the T-lock device. - Electronic T-
lock device 1340 also communicates with electroniccoin vending circuitry 1350 throughoptocoupler interface 1360. The electroniccoin vending circuitry 1350 includes a memory for maintaining information regarding the amount of money deposited in the vending machine, inventory information relating to the different types and quantities of merchandise sold and still on hand, and other pertinent information relating to the operation of the vending machine. The electroniccoin vending circuitry 1350 is conventionally known in the art and for this reason will not be further described. The optocoupler interface consists of LED and optotransistor circuitry and is also well known in the art. Theoptocoupler interface 1360 enables existing vending machines to be retrofitted with novel electronic T-lock devices 1340 by providing isolation coupling between the existing coin vending circuitry and the T-lock device, to avoid any possible damage due to voltage incompatibility between the components. Theoptocoupler interface 1360 allows inventory data to be transferred from thevending machine circuitry 1350 to thehandheld computer 1301 where it is stored in memory. While optocoupling circuitry is used in one design of security system, it is noted that other types of interfacing including hardwiring may be used in the invention with equivalent function. - One advantage lies in the ability of the
HHC 1301 to download inventory data from thevending machine 1303 by simply inserting thekey device 1302 into the T-lock device 1340. Upon successful transfer of coded security information, the T-lock will retrieve inventory data from thevending circuity 1350 and transfer it to theHHC 1301. Service personnel may then read the inventory information from the HHC display, allowing the servicer to determine the quantities and types of inventory that require restocking in the vending machine, without requiring the servicer to open the machine to either access the coin vending circuitry, or to visually inspect the inventory, thus saving considerable time and enhancing convenience. The inventory data may also be uploaded to thehost management system 1304 along with the route collection data as described previously, for use by management. The access protocols between theHHC 1301 and the T-lock device 1340 are the same as shown in Figs. 10 and 12. - Fig. 14 illustrates a mechanical T-lock assembly which is used in conjunction with an embodiment of a security system comprising a lock, in particular a T-lock device, of the present invention. The mechanical aspects of the T-lock assembly are disclosed in U.S. Patent 5,038,588.
- In general, a
locking mechanism 30 having abolt 18 is mounted within a cylinder/extension rod housing 22. A threadedextension rod 20 is mounted in the housing at the other end thereof and is secured within the housing by means of ahead 48 andteeth 58 which mate with corresponding cam means in the end of thehousing 22. The lock assembly of Fig. 14 is shown in its unlocked position in whichbolt 18 is retracted from engagement with an opening 44 ahollow shank portion 46 in T-handle housing unit 16.Bolt 18 is engageable with opening 44 through anaperture 42 in the cylinder/extension rod housing 22. Upon retraction of thebolt 18 from theopening 44,spring 60 forces the end of thehousing 22 into engagement with theteeth 58.Front handle 15 thus pops out of its nested position withinhousing 16 and allows theextension rod 20 to be unscrewed from its complementary threaded section within the vending machine. The T-lock device 1340 is mounted within a door or access panel of the machine or box with which it is associated, and thus unscrewing of theextension rod 20 allows the interior of the vending machine or other type of box to be accessed.Key device 1302 is inserted into a keyway of lockingmechanism 30 and is turned in order to retractbolt 18 from engagement withopening 44. - Fig. 16 illustrates the constituent parts of the novel electronic T-lock device and the
locking mechanism 30 of an embodiment of the present invention.Bolt 18 is mounted inbolt housing 1640. - The
bolt 18 may be a spring-loaded bolt or a deadbolt.Bolt 18 includes achannel 181 and acam slot 182 as shown in Figs. 17E and 17F.Bolt cam 1630 is mounted withinbolt housing 1640, and includes acam pin 1631 which engages within thechannel 181 and rests withinslot 182 as thebolt 18 is being retracted through rotation of the key. Figs. 17C and 17D respectively show a front and rear view of thebolt cam 1630. As shown,bolt cam 1630 includes ateardrop slot 1632, and a 180°slot 1633. - The
bolt cam 1630 is engaged byshaft 1622 ofarmature 1623.Shaft 1622 has aprojection 1625 at the end thereof adjacent thebolt cam 1630. Theshaft 1622 andprojection 1625 fit into the teardrop slot of thebolt cam 1630. Thearmature 1623 is mounted withinsolenoid 1620, and is normally biased toward the bolt cam by aspring 1624.Spring 1624 forces theshaft 1622 fully within the bolt cam so that theprojection 1625 is located within 180°slot 1633. The other end of theshaft 1622 is slotted along the edge thereof; this slot engages withchamfer 1615 ofplug assembly 1610, as shown in Fig. 17B.Plug assembly 1610 has akeyway 1613 and adata contact terminal 1614 at the front end thereof, as shown in Fig. 17A. A 180°channel 1612 is provided on the back end ofplug assembly 1610. This channel interacts with aroll pin 59 which projects into the interior ofhousing 22 when the plug assembly is mounted therein. Analignment slot 1501 is provided inopening 1510 offront handle 15, as shown in Fig. 15, to ensure that the plug assembly, and thusprojection 1625, is properly aligned with theteardrop slot 1632, by requiring thekeyway 1613 to be aligned with thealignment slot 1501 in order for thekey device 1302 to be inserted into the keyway. Tabs on the end ofhousing 22 engage with a vertical slot in front handle 15, and thehousing 22 is rigidly secured to the front handle by means of aset screw 1503 which is threaded throughthread hole 1504 inhandle 15. The electronic lock circuit as shown in Fig. 6 is formed on anIC chip 1502 which is mounted within a hollowed out section offront handle 15.Wire contacts 1611 connect the data/power contact terminal 1614 to theIC chip 1502 andpower terminals 1621 connect thesolenoid 1620 to theIC chip 1502. Additional wiring (not shown) connects the IC chip to theoptocoupler interface 1360. - In operation, when the
solenoid 1620 is unenergized, thespring 1623 forces theprojection 1625 into the 180°slot 1633 of the bolt cam. Thus, insertion of a key or other instrument inkeyway 1613 will allow theplug assembly 1610 andarmature 1623 to be freely rotated 180° without engaging the bolt cam to retract thebolt 18. Upon the proper transfer of decrypted ID code data from the HHC to thelock circuit 1502, the lock circuit allows power to be transmitted to thesolenoid 1620, drawing thearmature 1623 in toward the solenoid. In this position, theprojection 1625 engages with theteardrop slot 1632, and rotation of the key 1302 will thus rotate thebolt cam 1630 causing thebolt 18 to retract and providing access to the vending machine. - While the disclosed T-lock assembly uses a threaded extension rod, this is not critical to the operation of the invention, and other equivalent attachment mechanisms for securing the T-lock to the housing enclosure such as ratchets, latches, pins, etc. may be used equivalently according to the invention.
Claims (8)
- A security system, comprising a lock (30), said lock (30) including:a bolt (18) movable between a locked position and an unlocked position;a bolt cam (1630) contacting said bolt (18) and moving said bolt (18) between said locked position and said unlocked position through rotation of said bolt cam (1630);
plug means (1610) connected to said shaft means (1622) for rotating said shaft means (1622), said plug means (1610) having a keyway for insertion of key means for rotating said plug means (1610);
solenoid means (1620) for drawing said shaft means (1622) into active engagement with said bolt cam (1630) upon energization of said solenoid means (1620) so that said bolt cam (1630) may be rotated by said shaft means (1622); and
access means for selectively energizing said solenoid means (1620);
wherein said shaft means (1622) is passively engaged with said bolt cam (1630) so as to rotate without rotating said bolt cam (1630) when said solenoid means (1620) is not energized. - A security system according to claim 1, wherein said shaft means (1622) includes a projection (1625) on an end thereof, said bolt cam (1630) includes a channel (1633) within which said projection (1625) rotates without engaging said bolt cam (1630) when said shaft means (1622) is passively engaged with said bolt cam (1630), and said bolt cam (1630) further includes a teardrop slot (1632) within which said projection (1625) engages said bolt cam (1630) for rotating said bolt cam (1630) when said shaft means (1622) is actively engaged with said bolt cam (1630).
- A security system according to claim 1, wherein said access means (206) comprises means for receiving data from said key means (1302), means for determining whether data received from said key means (1302) is authorized data, and means for energizing said solenoid mean (1620) when data received from said key means (1302) is determined to be authorized data.
- A security system according to claim 1, further comprising:an extension rod (20);an elongated housing assembly (22) for housing therein said extension rod (20), said bolt (18), said bolt cam (1630), said shaft means (1622), said solenoid means (1620) and said plug means (1610); anda front handle (15) coupled to said elongated housing assembly (22) and having a recess (1510) formed therein, said access means (206) being located within said recess (1510).
- A security system according to claim 1, wherein said key means (1302) includes:a handheld computer (908) including means for storing encoded data (502), andan internal circuit board installed within said handheld computer (908) for interfacing said handheld computer (908) with said access means (206), including means for decoding said encoded data stored in said handheld computer (908) into decoded data and means for generating said specific data for transmission to said access means (206) based on said decoded data.
- A security system according to claim 5, further comprising a key device (101) coupled to said internal circuit board via an I/O port of said handheld computer (908), said key device (101) being insertable into said plug means (1610) and providing operative power to said lock from said handheld computer (908), and providing data from said lock to said handheld computer (908).
- A security system according to claim 1, wherein said lock (30) is installed in a vending machine having internal memory circuitry (208) which stores inventory information therein;
said lock (30) further comprising interface means for coupling said access means (206) with said internal memory circuitry (208), said access means (206) reading said inventory information from said internal memory circuitry (208) and transmitting said inventory information to said handheld computer (908) through said key means (101). - A security system according to claim 7, wherein said key means (104a) includes a key (101) having a data contact (103), and said plug means includes a terminal (206) for contacting said data contact (103) of said key (101) through which said inventory information is transmitted to said memory means (502) of said electronic key means (104a).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US26781 | 1987-03-17 | ||
US08/026,781 US6005487A (en) | 1990-05-11 | 1993-03-05 | Electronic security system with novel electronic T-handle lock |
PCT/US1994/002322 WO1994021089A1 (en) | 1993-03-05 | 1994-03-03 | Electronic security system with novel electronic t-handle lock |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0688491A1 EP0688491A1 (en) | 1995-12-27 |
EP0688491A4 EP0688491A4 (en) | 1997-06-25 |
EP0688491B1 true EP0688491B1 (en) | 2003-08-06 |
Family
ID=21833755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94911454A Expired - Lifetime EP0688491B1 (en) | 1993-03-05 | 1994-03-03 | Electronic security system with novel electronic t-handle lock |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0688491B1 (en) |
AT (1) | ATE246866T1 (en) |
CA (1) | CA2157480C (en) |
DE (1) | DE69433008D1 (en) |
WO (1) | WO1994021089A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11928904B2 (en) | 2019-08-02 | 2024-03-12 | Yunding Network Technology (Beijing) Co., Ltd. | Methods and systems for controlling a smart lock |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2115539B1 (en) * | 1996-07-02 | 1999-02-01 | Sgb Equipo Electrico Sl | SINGLE KEY SYSTEM. |
US6082153A (en) * | 1997-09-17 | 2000-07-04 | Medeco Security Locks, Inc. | Anti-tampering device for use with spring-loaded electronically moved pin locking mechanisms in electronic locks and the like |
AUPQ371299A0 (en) * | 1999-10-28 | 1999-11-18 | Garamex Pty Ltd | Vendingmachine security |
EA029790B1 (en) * | 2012-01-05 | 2018-05-31 | Государственное Научное Учреждение "Объединенный Институт Энергетических И Ядерных Исследований-Сосны" Национальной Академии Наук Беларуси | System and method for determining quantity of carcinogenic and/or toxic substances in the environment |
FR3001993B1 (en) * | 2013-02-11 | 2015-07-17 | S R Tech | UNIVERSAL PILOTAGE INTERFACE FOR ELECTRICALLY CONTROLLED LOCKING DEVICES |
CN106898065B (en) | 2017-01-21 | 2020-01-17 | 云丁网络技术(北京)有限公司 | Unlocking method of intelligent door lock |
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US4369442A (en) * | 1977-09-06 | 1983-01-18 | Robert L. Werth | Code controlled microcontroller readout from coin operated machine |
US4829296A (en) * | 1986-04-30 | 1989-05-09 | Carey S. Clark | Electronic lock system |
US5038588A (en) * | 1990-08-07 | 1991-08-13 | Medeco Security Locks, Inc. | High security T-handle lock assembly with front handle improvements |
US5140317A (en) * | 1990-05-11 | 1992-08-18 | Medeco Security Locks, Inc. | Electronic security system |
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US3812403A (en) * | 1972-06-29 | 1974-05-21 | K Gartner | Electronic combination lock including sequential signal generator and signal display |
US4727368A (en) * | 1985-12-30 | 1988-02-23 | Supra Products, Inc. | Electronic real estate lockbox system |
US4736970A (en) * | 1987-03-09 | 1988-04-12 | Mcgourty Thomas K | Electrically controlled door lock |
US5018375A (en) * | 1990-09-18 | 1991-05-28 | Yale Security Inc. | Lockset having electric means for disabling and enabling the outer handle |
US5212972A (en) * | 1992-06-15 | 1993-05-25 | The Eastern Company | Tamper resistant pop-handle lock |
-
1994
- 1994-03-03 EP EP94911454A patent/EP0688491B1/en not_active Expired - Lifetime
- 1994-03-03 DE DE69433008T patent/DE69433008D1/en not_active Expired - Lifetime
- 1994-03-03 WO PCT/US1994/002322 patent/WO1994021089A1/en active IP Right Grant
- 1994-03-03 CA CA002157480A patent/CA2157480C/en not_active Expired - Fee Related
- 1994-03-03 AT AT94911454T patent/ATE246866T1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4369442A (en) * | 1977-09-06 | 1983-01-18 | Robert L. Werth | Code controlled microcontroller readout from coin operated machine |
US4829296A (en) * | 1986-04-30 | 1989-05-09 | Carey S. Clark | Electronic lock system |
US5140317A (en) * | 1990-05-11 | 1992-08-18 | Medeco Security Locks, Inc. | Electronic security system |
US5038588A (en) * | 1990-08-07 | 1991-08-13 | Medeco Security Locks, Inc. | High security T-handle lock assembly with front handle improvements |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11928904B2 (en) | 2019-08-02 | 2024-03-12 | Yunding Network Technology (Beijing) Co., Ltd. | Methods and systems for controlling a smart lock |
Also Published As
Publication number | Publication date |
---|---|
EP0688491A4 (en) | 1997-06-25 |
CA2157480C (en) | 1999-05-25 |
CA2157480A1 (en) | 1994-09-15 |
WO1994021089A1 (en) | 1994-09-15 |
EP0688491A1 (en) | 1995-12-27 |
ATE246866T1 (en) | 2003-08-15 |
DE69433008D1 (en) | 2003-09-11 |
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