US3520124A - Timer device - Google Patents
Timer device Download PDFInfo
- Publication number
- US3520124A US3520124A US799055A US3520124DA US3520124A US 3520124 A US3520124 A US 3520124A US 799055 A US799055 A US 799055A US 3520124D A US3520124D A US 3520124DA US 3520124 A US3520124 A US 3520124A
- Authority
- US
- United States
- Prior art keywords
- reaction
- barrier
- reactant
- compartment
- indicating
- 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
Links
Images
Classifications
-
- 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
- G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
- G07C1/30—Parking meters
Definitions
- the reacting materials are carried on a base member and are separated by a barrier preventing contact therebetween. Upon elimination of the barrier, a commencement signal is produced indicating the time reaction is underway. In preferred embodiments the commencement and termination signals involve abrupt color changes.
- the device finds particular utility as an elapsed time indicator for indicating motor vehicle parking time.
- This invention relates to timing devices for measuring a predetermined time interval. More specifically, it relates to a self cancelling time ticket or device based on a reaction system of two or more components.
- the device is preferably in the form of a ticket or the like which provides a signal that the reaction is underway (a commencement signal) and a termination signal indicating that the reaction is complete and that the predetermined time period has elapsed.
- the commencement signal and termination signal may be in the form of color changes, although other signals are within the scope of the invention.
- the device has utility in indicating elapsed time in a wide variety of applications.
- An important application is in indicating motor vehicle parking periods. For example, a motorist would purchase or otherwise be provided with time tickets containing a reaction system having a two hour reaction time. Upon parking the vehicle in a two hour parking zone, the motorist would activate the reaction system on the ticket and aflix the ticket to the windshield of his vehicle. Upon activating the system, the commencement signal is produced, indicating that the reaction is underway. After two hours the reaction is complete and an abrupt termination signal is produced.
- the device thus serves the same function as a parking meter but at much less cost, particularly the initial investment, meter maintenance, and collection costs.
- Other applications include elapsed time indicators for indicating expiration times on drugs, chemical, photographic film and the like.
- reaction system includes both chemical reactions and purely physical reactions.
- Examples of chemical reactions which may be employed are so-called clock reactions such as the iodine clock reaction, the formaldehyde clock reaction, the methylene blue-sugar reaction or reactions indicating pH change.
- Example of physical reactions include the disintegration by a solvent of time capsules which may contain a dye, for example, or which contain a material chemically reactive with the solvent to produce a termination signal.
- the reacting components forming the reaction system are physically separated by barrier means.
- the barrier is eliminated or broken, and the commencement signal is produced indicating the reaction is underway.
- FIG. 1 is a partial view of a motor vehicle having the timer device displayed on the windshield of the vehicle.
- FIGS. 28 illustrate various forms of the invention, to be described in detail herein.
- FIG. 1 a motor vehicle 20 is shown having a time ticket 21 displayed on the windshield 21.
- FIG. 2A illustrates the device after the reacion has commenced.
- the cover sheet could be opaque and colored green, for example.
- the reactants 24 and 25 are coated on the base in the form of clear or white gels.
- Reactant 24 comprised potassium iodate contained in aqueous gelatin gel.
- Reactant 25 comprised the following in aqueous gelatin gel: starch, sodium sulfite, salicylic acid, and sulfuric acid.
- the above system is the iodine clock reaction.
- the reactant coatings are translucent white. After the reaction is complete, the device abruptly turns blue. By suitable manipulation of concentration of the reactants, elapsed times of from 30 minutes to two hours can be measured.
- Reactant 24 comprised 0.1 N HCl and 1% phenolphlthalein in ethyl alcohol in aqueous gelatin gel
- a clear ge Reactant 25 comprised finely powdered trisodium phosphate microencapsulated in polyvinyl alcohol, forming a white coating.
- the material When the aqueous medium disintegrates the polyvinyl alcohol coating on the phosphate particles, the material turns red.
- elapsed times By way varying the thickness of of the polyvinyl alcohol coating, elapsed times of from one to eight hours can be measured.
- Reactant 24 comprised 0.1 N HCl in aqueous gelatin gel.
- Reactant 25 comprised finely divided ultramarine blue microencapsulated in polyvinyl alcohol, forming a white coating.
- thickness of the polyvinyl alcohol coating By varying the thickness of the polyvinyl alcohol coating, elapsed times of from one to eight hours can be measured. The system turns deep blue upon completion.
- FIG. 3 illustrates another embodiment of the invention.
- a transparent plastic envelope 28 is provided with a frangible barrier 29 separating compartments 30 and 31.
- An alkali soluble barrier 32 separating compartments 31 and 33.
- Compartment 30 contains 0.1 N NaOH which is colorless.
- Compartment 31 contains water containing a drop of 1% phenolphthalein in ethanol.
- Barrier 29 is ruptured by squeezing compartment 30 and the resulting solution turns red, the commencement signal.
- Barrier 32 is formed of maleic anhydride methyl vinyl ether copolymer which is alkali soluble.
- Compartment 33 contains a drop of 2% methyl green in ethanol.
- FIG. 4 illustrates a further embodiment.
- a transparent envelope 34 is provided with a frangible barrier 35 separating compartments 36 and 37.
- Compartment 36 contains 0.1 N HCl.
- Compartment 37 contains a single crystal of methyl orange plus the microencapsulated ultramarine blue of Example III.
- the barrier 35 is ruptured by bending the device as shown, whereupon the solution turns red. After the polyvinyl alcohol coating has disintegrated, the solution is blue.
- FIG. shows another embodiment.
- Envelope 38 has a frangible barrier 39 and is sealed to absorbent filter paper 40.
- the absorbent paper 40 is impregnated with aqueous potassium iodate plus 0.01% methyl yellow and is dried. The paper is yellow.
- Envelope 38 contains the remaining iodine clock reagents, as set forth in Example I, in aqueous solution, Envelope 38 is squeezed, rupturing the barrier 39 and saturating paper 40, which now turns red. Upon completion of the reaction, the paper turns blue.
- FIG. 6 illustrates a further embodiment.
- Transparent envelope 41 is provided with a frangible barrier 42 forming compartment 43 which contains 0.1 N acetic acid and litmus extract, producing a red color.
- Compartment 44 is filled with a microporous material 45 such as polyurethane foam, for example, compartment 46 contains cotton or the like impregnated with 0.1 N sodium hydroxide and subsequently dried.
- a microporous material 45 such as polyurethane foam
- compartment 46 contains cotton or the like impregnated with 0.1 N sodium hydroxide and subsequently dried.
- the acetic acid and litmus solution move by capillary action through the microporous material progressively turning it red.
- the caustic impregnated absorbent material turns blue, indicating the termination.
- FIG. 7 A further embodiment is illustrated in FIG. 7.
- Transparent envelope 47 is provided with a frangible barrier 48 forming compartments 49 and 50.
- Compartment 49 contains a solution of one reactant.
- Compartment 50 is filled with the second reactant microencapsulated in a slowly soluble material and an indicator. Examples of suitable reactants are those described in connection with FIG. 4. The reaction is commenced by squeezing compartment 49, thereby fracturing barrier 48.
- FIG. 8 Another embodiment is shown in FIG. 8.
- a base member 51 is coated with frangible microcapsules 52 containing one reactant.
- a second coating of frangible microcapsules 53 containing a second reactant and a dye is superposed on the first coating.
- the reaction is initiated by fracturing the microcapsules, as by rubbing with a coin 54.
- Microcapsules 52 and 53 are, for example, white before being fractured.
- the dye and the reactants are released, signalling the commencement of the reaction.
- the reactants may be the iodine clock reactants of Example I, the encapsulated potassium iodate containing, for example, a yellow dye.
- reaction times varying from a few minutes to several days may be obtained.
- a device for indicating a predetermined time interval comprising a base carrying two materials which upon contact comprise a reaction system requiring a predetermined time interval from commencement to termination, said reaction system producing a termination signal upon termination, barrier means preventing contact of said two materials and means for producing a signal coincident with elimination of said barrier means for signaling commencement of the reaction.
- commencement and termination signals involve abrupt color changes.
- reaction system comprises a chemical reaction having a predetermined induction period whereby an abrupt termination signal is produced.
- one of said reaction materials comprises a solvent which attacks and disintegrates a coating covering the second reactant.
- the separately encapsulated reactant materials comprise the reactants for the iodine clock reaction, one of said encapsulated reactants including a dye for signaling commencement of the reaction.
- said barrier means comprises a frangible wall separating the reactant materials.
Description
July 14, 1970 s. MYERS 3,520,124
TIMER DEVICE Filed Feb. 13, 1969 Fifii (26 INVENTOR SUMNER MYERS 5| W j g ATTORNEYS United States Patent Ofice 3,520,124 Patented July 14, 1970 3,520,124 TIMER DEVICE Sumner Myers, 3248 Patterson St. NW., Washington, D.C. 20015 Filed Feb. 13, 1969, Ser. No. 799,055 Int. Cl. G01d 21/00; G04f 1/00 US. Cl. 58-1 11 Claims ABSTRACT OF THE DISCLOSURE A device for indicating a predetermined time interval based on two or more materials which react, either chemically or physically over a predetermined period to produce a termination signal. The reacting materials are carried on a base member and are separated by a barrier preventing contact therebetween. Upon elimination of the barrier, a commencement signal is produced indicating the time reaction is underway. In preferred embodiments the commencement and termination signals involve abrupt color changes. The device finds particular utility as an elapsed time indicator for indicating motor vehicle parking time.
This invention relates to timing devices for measuring a predetermined time interval. More specifically, it relates to a self cancelling time ticket or device based on a reaction system of two or more components. The device is preferably in the form of a ticket or the like which provides a signal that the reaction is underway (a commencement signal) and a termination signal indicating that the reaction is complete and that the predetermined time period has elapsed. The commencement signal and termination signal may be in the form of color changes, although other signals are within the scope of the invention.
It is among the objects of this invention to provide a simple, inexpensive, fool-proof timing device for indicating a predetermined time period. Other objects and advantages will be apparent from the description herein.
The device has utility in indicating elapsed time in a wide variety of applications. An important application is in indicating motor vehicle parking periods. For example, a motorist would purchase or otherwise be provided with time tickets containing a reaction system having a two hour reaction time. Upon parking the vehicle in a two hour parking zone, the motorist would activate the reaction system on the ticket and aflix the ticket to the windshield of his vehicle. Upon activating the system, the commencement signal is produced, indicating that the reaction is underway. After two hours the reaction is complete and an abrupt termination signal is produced. Thus, law enforcement ofiicials can readily detect vehicles which have been parked longer than the parking limit. The device thus serves the same function as a parking meter but at much less cost, particularly the initial investment, meter maintenance, and collection costs. Other applications include elapsed time indicators for indicating expiration times on drugs, chemical, photographic film and the like.
The term reaction system as used in the specification and claims includes both chemical reactions and purely physical reactions. Examples of chemical reactions which may be employed are so-called clock reactions such as the iodine clock reaction, the formaldehyde clock reaction, the methylene blue-sugar reaction or reactions indicating pH change. Example of physical reactions include the disintegration by a solvent of time capsules which may contain a dye, for example, or which contain a material chemically reactive with the solvent to produce a termination signal.
The reacting components forming the reaction system are physically separated by barrier means. To activate the system, the barrier is eliminated or broken, and the commencement signal is produced indicating the reaction is underway.
Referring to the drawing:
FIG. 1 is a partial view of a motor vehicle having the timer device displayed on the windshield of the vehicle.
FIGS. 28 illustrate various forms of the invention, to be described in detail herein.
In FIG. 1, a motor vehicle 20 is shown having a time ticket 21 displayed on the windshield 21.
In FIG. 2, a transparent base 23 of plastic film or cellophane or the like is coated in separate areas with a reactant 24 and a second reactant 25. A strippable cover sheet 26 covers both reactants. To activate the device, the cover sheet 26 is removed and the coated base 23 folded at 27 to place the reactants in contact. FIG. 2A illustrates the device after the reacion has commenced. In practice the cover sheet could be opaque and colored green, for example. The reactants 24 and 25 are coated on the base in the form of clear or white gels. Thus upon activating the device as shown in FIG. 2A the ticket now appears clear or white, the commencement signal. After the reaction is complete the device abruptly turns red, for example, the termination signal, indicating the predetermined time period has elapsed.
The following examples illustrate reaction systems utilizable in the embodiment shown in FIGS. 2 and 2A:
EXAMPLE I Reactant 24 comprised potassium iodate contained in aqueous gelatin gel.
Reactant 25 comprised the following in aqueous gelatin gel: starch, sodium sulfite, salicylic acid, and sulfuric acid.
The above system is the iodine clock reaction. The reactant coatings are translucent white. After the reaction is complete, the device abruptly turns blue. By suitable manipulation of concentration of the reactants, elapsed times of from 30 minutes to two hours can be measured.
EXAMPLE II Reactant 24 comprised 0.1 N HCl and 1% phenolphlthalein in ethyl alcohol in aqueous gelatin gel, a clear ge Reactant 25 comprised finely powdered trisodium phosphate microencapsulated in polyvinyl alcohol, forming a white coating.
When the aqueous medium disintegrates the polyvinyl alcohol coating on the phosphate particles, the material turns red. By way varying the thickness of of the polyvinyl alcohol coating, elapsed times of from one to eight hours can be measured.
EXAMPLE III Reactant 24 comprised 0.1 N HCl in aqueous gelatin gel.
FIG. 3 illustrates another embodiment of the invention. A transparent plastic envelope 28 is provided with a frangible barrier 29 separating compartments 30 and 31. An alkali soluble barrier 32 separating compartments 31 and 33. Compartment 30 contains 0.1 N NaOH which is colorless. Compartment 31 contains water containing a drop of 1% phenolphthalein in ethanol. Barrier 29 is ruptured by squeezing compartment 30 and the resulting solution turns red, the commencement signal. Barrier 32 is formed of maleic anhydride methyl vinyl ether copolymer which is alkali soluble. Compartment 33 contains a drop of 2% methyl green in ethanol. When barrier 32 is disintegrated by the alkali, the solution escapes into compartment 33 and turns violet. By varying the thickness of barrier 32, predetermined times of 30 minutes to 4 hours can be measured.
FIG. 4 illustrates a further embodiment. A transparent envelope 34 is provided with a frangible barrier 35 separating compartments 36 and 37. Compartment 36 contains 0.1 N HCl. Compartment 37 contains a single crystal of methyl orange plus the microencapsulated ultramarine blue of Example III. The barrier 35 is ruptured by bending the device as shown, whereupon the solution turns red. After the polyvinyl alcohol coating has disintegrated, the solution is blue.
FIG. shows another embodiment. Envelope 38 has a frangible barrier 39 and is sealed to absorbent filter paper 40. The absorbent paper 40 is impregnated with aqueous potassium iodate plus 0.01% methyl yellow and is dried. The paper is yellow. Envelope 38 contains the remaining iodine clock reagents, as set forth in Example I, in aqueous solution, Envelope 38 is squeezed, rupturing the barrier 39 and saturating paper 40, which now turns red. Upon completion of the reaction, the paper turns blue.
FIG. 6 illustrates a further embodiment. Transparent envelope 41 is provided with a frangible barrier 42 forming compartment 43 which contains 0.1 N acetic acid and litmus extract, producing a red color. Compartment 44 is filled with a microporous material 45 such as polyurethane foam, for example, compartment 46 contains cotton or the like impregnated with 0.1 N sodium hydroxide and subsequently dried. Upon breaking the barrier 42, the acetic acid and litmus solution move by capillary action through the microporous material progressively turning it red. When the solution migrates to the compartment 46 the caustic impregnated absorbent material turns blue, indicating the termination. By proper selection of pore size of the microporous material, elapsed times of from minutes to one hour can be measured.
A further embodiment is illustrated in FIG. 7. Transparent envelope 47 is provided with a frangible barrier 48 forming compartments 49 and 50. Compartment 49 contains a solution of one reactant. Compartment 50 is filled with the second reactant microencapsulated in a slowly soluble material and an indicator. Examples of suitable reactants are those described in connection with FIG. 4. The reaction is commenced by squeezing compartment 49, thereby fracturing barrier 48.
Another embodiment is shown in FIG. 8. A base member 51 is coated with frangible microcapsules 52 containing one reactant. A second coating of frangible microcapsules 53 containing a second reactant and a dye is superposed on the first coating. The reaction is initiated by fracturing the microcapsules, as by rubbing with a coin 54. Microcapsules 52 and 53 are, for example, white before being fractured. Upon fracture, the dye and the reactants are released, signalling the commencement of the reaction. The reactants may be the iodine clock reactants of Example I, the encapsulated potassium iodate containing, for example, a yellow dye.
It will be apparent to those skilled in the art that many other chemical or physical reaction systems may be employed in the present invention. By suitably controlling the concentrations of the reactants, in the case of chemical reaction systems, or by control of soluble barrier thickness, reaction times varying from a few minutes to several days may be obtained.
I claim:
1. A device for indicating a predetermined time interval comprising a base carrying two materials which upon contact comprise a reaction system requiring a predetermined time interval from commencement to termination, said reaction system producing a termination signal upon termination, barrier means preventing contact of said two materials and means for producing a signal coincident with elimination of said barrier means for signaling commencement of the reaction.
2. The device set forth in claim 1 wherein said commencement and termination signals involve abrupt color changes.
3. The device set forth in claim 1 wherein said reaction system comprises a chemical reaction having a predetermined induction period whereby an abrupt termination signal is produced.
4. The device set forth in claim 3 wherein said reaction is the iodine clock reaction.
5. The device set forth in claim 1 wherein one of said reaction materials comprises a solvent which attacks and disintegrates a coating covering the second reactant.
6. The device set forth in claim 1 wherein said reactant materials are separately encapsulated in frangible microcapsules coated on said base.
7. The device set fort-h in claim 6 wherein the separately encapsulated reactant materials comprise the reactants for the iodine clock reaction, one of said encapsulated reactants including a dye for signaling commencement of the reaction.
8. The device set forth in claim 1 wherein the reactant materials produce a pH change and contain an indicator responsive to said pH change to produce the commencement signal.
9. The device set forth in claim 1 wherein the reactant materials produce a pH change and contain an indicator responsive to said pH change to produce the termination signal.
10. The device set forth in claim 1 wherein said reactant materials are coated on separate areas of said base and said barrier means is a strippable sheet covering said coated base whereby the reaction is commenced by contacting said separately coated areas together.
11. The device set forth in claim 1 wherein said barrier means comprises a frangible wall separating the reactant materials.
References Cited UNITED STATES PATENTS 2,337,534 12/1943 Barber 581 2,671,424 3/1954 Herring et a1 116-114 X 3,018,611 1/1962 BiritZ 58-1 3,420,635 1/1969 Davis 1l6-1 14 X FOREIGN PATENTS 2,432 1/1910 Great Britain.
RICHARD B. WILKINSON, Primary Examiner S. A. WAL, Assistant Examiner US. Cl. X.R. 23253; 116-114
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79905569A | 1969-02-13 | 1969-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3520124A true US3520124A (en) | 1970-07-14 |
Family
ID=25174938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US799055A Expired - Lifetime US3520124A (en) | 1969-02-13 | 1969-02-13 | Timer device |
Country Status (1)
Country | Link |
---|---|
US (1) | US3520124A (en) |
Cited By (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3599419A (en) * | 1969-05-23 | 1971-08-17 | Us Army | Chemo-mechanical timer |
US3768976A (en) * | 1971-05-20 | 1973-10-30 | Us Army | Temperature-time integrating indicator |
US3942467A (en) * | 1974-01-21 | 1976-03-09 | Bio-Medical Sciences, Inc. | Time temperature indicator |
US3954011A (en) * | 1973-09-24 | 1976-05-04 | Minnesota Mining And Manufacturing Company | Selected time interval indicating device |
US4206838A (en) * | 1978-07-28 | 1980-06-10 | Micro-Circuits Company | Time-lapse indicator or the like |
US4212153A (en) * | 1978-02-07 | 1980-07-15 | Herculite Protective Fabrics Corporation | Time color indicator |
US4229813A (en) * | 1978-06-26 | 1980-10-21 | Akzona Incorporated | Elapsed time indicator |
US4292916A (en) * | 1979-06-18 | 1981-10-06 | Micro-Circuits Company | Timer and storage condition indicator |
US4298115A (en) * | 1979-02-09 | 1981-11-03 | Micro-Circuits Company | Time-lapse indicator |
US4367957A (en) * | 1978-07-28 | 1983-01-11 | Micro-Circuits Company | Time-lapse indicator or the like |
US4408557A (en) * | 1979-06-18 | 1983-10-11 | Micro-Circuits Co., Inc. | Timer and storage condition indicator |
US4643588A (en) * | 1984-04-25 | 1987-02-17 | Ciba-Geigy Ag | Method of monitoring temperature |
WO1987002163A1 (en) * | 1985-10-03 | 1987-04-09 | Klaus Dietrich | Process and device for marking new parts |
US4903254A (en) * | 1989-08-31 | 1990-02-20 | Haas David J | Time indicator enhancement method |
US4979400A (en) * | 1989-02-27 | 1990-12-25 | Proprietary Technology, Inc. | Force and elapsed time recording assembly |
WO1991004520A1 (en) * | 1989-09-20 | 1991-04-04 | Tothill, John, Compton | An automatic parking coupon |
US5045283A (en) * | 1988-08-02 | 1991-09-03 | Jp Labs Inc. | Moving boundary device for monitoring shelf-life of a perishable product |
US5053339A (en) * | 1988-11-03 | 1991-10-01 | J P Labs Inc. | Color changing device for monitoring shelf-life of perishable products |
US5058088A (en) * | 1990-01-04 | 1991-10-15 | Haas Sandra F | Time indicator |
US5107470A (en) * | 1990-03-12 | 1992-04-21 | Note/Worthy Products, Inc. | Fast-acting time color indicator |
WO1993000669A1 (en) * | 1991-06-27 | 1993-01-07 | Haas David J | Patterned indicators |
GB2271000A (en) * | 1992-09-24 | 1994-03-30 | Michael Francis Isaacs | Status monitoring device. |
US5317987A (en) * | 1989-11-02 | 1994-06-07 | Badische Tabakmanufaktur Roth-Handle Gmbh | Indicator for display of elapsed times and/or of the moment when changes of state occur |
US5364132A (en) * | 1991-02-04 | 1994-11-15 | S.J.A. Trust | Method for assembly and activation of a reusable security identification badge |
US5602804A (en) * | 1995-08-03 | 1997-02-11 | Temtec Inc | Long term rapid color changing time indicator |
US5633836A (en) * | 1995-12-04 | 1997-05-27 | Noteworthy Products, Inc. | Accelerated development time-delayed message system |
WO1997042551A1 (en) | 1996-05-06 | 1997-11-13 | Temtec, Inc. | Long-term rapid color changing time indicator employing dye absorbing viewing layer |
US5719828A (en) * | 1990-01-04 | 1998-02-17 | Temtec, Inc. | Patterned indicators |
US5756356A (en) * | 1995-03-31 | 1998-05-26 | Toyo Ink Manufacturing Co., Ltd. | Method of indicating time or temperature-time accumulated value as color change, and materials therefor |
US5976881A (en) * | 1992-05-28 | 1999-11-02 | Colormetric Laboratories, Inc. | Device and method for detecting chemical breakthrough of protective clothing |
FR2795533A1 (en) | 1999-06-22 | 2000-12-29 | Science Et Tec | Method for measuring fixed period of time for vehicle parking purposes by using non-miscible liquids that after initial shaking separates after set time period |
US6314907B1 (en) | 1999-08-02 | 2001-11-13 | Optiva | Device use indicator |
US6395551B1 (en) | 1994-02-16 | 2002-05-28 | 3M Innovative Properties Company | Indicator for liquid disinfection or sterilization solutions |
US6428748B1 (en) | 2001-01-31 | 2002-08-06 | Grouptek, Inc. | Apparatus and method of monitoring an analyte |
GB2344101B (en) * | 1998-11-26 | 2002-09-11 | Brent Lee Taylor | Time indicator for packaging closures |
EP1268178A1 (en) * | 2000-03-02 | 2003-01-02 | Lifelines Technology, Inc. | Activatable time-temperature indicator system |
US20030214997A1 (en) * | 2002-04-03 | 2003-11-20 | Diekmann Timothy J. | Time or time-temperature indicating articles |
US20040013839A1 (en) * | 2002-03-07 | 2004-01-22 | Ko Chan U. | Color changing device for time indicating label and methods of making and using the same |
US6741523B1 (en) | 2000-05-15 | 2004-05-25 | 3M Innovative Properties Company | Microstructured time dependent indicators |
US20050078013A1 (en) * | 2001-12-19 | 2005-04-14 | Yoshihide Mochizuki | Period indicator |
US20050141348A1 (en) * | 2003-12-31 | 2005-06-30 | Adamy Steven T. | Timing device |
US20060114754A1 (en) * | 2004-11-30 | 2006-06-01 | Macdonald John G | Visual indicator chronograph and the use of the same |
WO2006077413A2 (en) * | 2005-01-21 | 2006-07-27 | Intray Ltd | Open life indicator label for food produce and suchlike |
US20060274606A1 (en) * | 2005-06-03 | 2006-12-07 | Wesley Fields | Particle-based time indicator and method for its use |
US20070048503A1 (en) * | 2005-08-31 | 2007-03-01 | Macdonald John G | Solvatochromic visual indicator and the use of the same |
US20090043168A1 (en) * | 2007-08-09 | 2009-02-12 | Israel Ramos | Self-releasing tourniquet and method |
US20100043694A1 (en) * | 2008-08-20 | 2010-02-25 | Patel Gordhanbhai N | Tamper evident indicating devices |
US20100084347A1 (en) * | 2006-10-08 | 2010-04-08 | H2Q Water Industries | Fluid filter monitoring device |
US20100263244A1 (en) * | 2009-04-16 | 2010-10-21 | Nelson Tabirian | Labels and taggants with programmable multi color coded timing |
US20110129394A1 (en) * | 2002-10-01 | 2011-06-02 | Robert Holt | Inspection and testing indicator |
US8343437B2 (en) | 2008-06-04 | 2013-01-01 | Jp Laboratories, Inc. | Monitoring system based on etching of metals |
US9034192B2 (en) | 2009-09-09 | 2015-05-19 | Strauss Water Ltd. | Liquid filter device |
WO2015112679A1 (en) | 2014-01-27 | 2015-07-30 | Jp Laboratories, Inc | Indicating devices based on lateral diffusion of a mobile phase through a non-porous stationary phase |
US9448182B2 (en) | 2004-11-08 | 2016-09-20 | Freshpoint Quality Assurance Ltd. | Time-temperature indicating device |
EP3293493A1 (en) | 2008-06-04 | 2018-03-14 | G Patel | A monitoring system based on etching of metals |
US10046981B2 (en) | 2015-03-23 | 2018-08-14 | Strauss Water Ltd. | Water filter and assembly thereof |
US20190257695A1 (en) * | 2012-06-15 | 2019-08-22 | Freshpoint Quality Assurance Ltd. | Time and/or Temperature Sensitive Devices and Methods of Use Thereof |
WO2020183185A1 (en) * | 2019-03-13 | 2020-09-17 | Singh Arwinder | Transdermal patch |
US11002611B2 (en) | 2018-01-29 | 2021-05-11 | Timestrip Uk Limited | Elapsed time temperature indicator and method of activation and use |
US11398167B2 (en) * | 2016-07-11 | 2022-07-26 | Intray Ltd. | Time temperature indicator label |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191002432A (en) * | 1909-02-01 | 1910-08-11 | Felten And Guilleaume Lahmeyer | Improved Means for Checking the use of Electric Lighting Apparatus and more particularly of Electric Glow Lamps. |
US2337534A (en) * | 1941-06-14 | 1943-12-28 | Alfred W Barber | Device for indicating exposure time of printed pages |
US2671424A (en) * | 1953-01-21 | 1954-03-09 | Herring Arthur | Device for indicating when the contents of containers have been nearly exhausted |
US3018611A (en) * | 1962-01-30 | Timer device and method for determination | ||
US3420635A (en) * | 1966-03-28 | 1969-01-07 | Aseptic Thermo Indicator Co | Fruit ripeness telltale |
-
1969
- 1969-02-13 US US799055A patent/US3520124A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3018611A (en) * | 1962-01-30 | Timer device and method for determination | ||
GB191002432A (en) * | 1909-02-01 | 1910-08-11 | Felten And Guilleaume Lahmeyer | Improved Means for Checking the use of Electric Lighting Apparatus and more particularly of Electric Glow Lamps. |
US2337534A (en) * | 1941-06-14 | 1943-12-28 | Alfred W Barber | Device for indicating exposure time of printed pages |
US2671424A (en) * | 1953-01-21 | 1954-03-09 | Herring Arthur | Device for indicating when the contents of containers have been nearly exhausted |
US3420635A (en) * | 1966-03-28 | 1969-01-07 | Aseptic Thermo Indicator Co | Fruit ripeness telltale |
Cited By (80)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3599419A (en) * | 1969-05-23 | 1971-08-17 | Us Army | Chemo-mechanical timer |
US3768976A (en) * | 1971-05-20 | 1973-10-30 | Us Army | Temperature-time integrating indicator |
US3954011A (en) * | 1973-09-24 | 1976-05-04 | Minnesota Mining And Manufacturing Company | Selected time interval indicating device |
US3942467A (en) * | 1974-01-21 | 1976-03-09 | Bio-Medical Sciences, Inc. | Time temperature indicator |
US4212153A (en) * | 1978-02-07 | 1980-07-15 | Herculite Protective Fabrics Corporation | Time color indicator |
US4229813A (en) * | 1978-06-26 | 1980-10-21 | Akzona Incorporated | Elapsed time indicator |
US4206838A (en) * | 1978-07-28 | 1980-06-10 | Micro-Circuits Company | Time-lapse indicator or the like |
US4367957A (en) * | 1978-07-28 | 1983-01-11 | Micro-Circuits Company | Time-lapse indicator or the like |
US4298115A (en) * | 1979-02-09 | 1981-11-03 | Micro-Circuits Company | Time-lapse indicator |
US4292916A (en) * | 1979-06-18 | 1981-10-06 | Micro-Circuits Company | Timer and storage condition indicator |
US4408557A (en) * | 1979-06-18 | 1983-10-11 | Micro-Circuits Co., Inc. | Timer and storage condition indicator |
US4643588A (en) * | 1984-04-25 | 1987-02-17 | Ciba-Geigy Ag | Method of monitoring temperature |
WO1987002163A1 (en) * | 1985-10-03 | 1987-04-09 | Klaus Dietrich | Process and device for marking new parts |
US5045283A (en) * | 1988-08-02 | 1991-09-03 | Jp Labs Inc. | Moving boundary device for monitoring shelf-life of a perishable product |
US5053339A (en) * | 1988-11-03 | 1991-10-01 | J P Labs Inc. | Color changing device for monitoring shelf-life of perishable products |
US4979400A (en) * | 1989-02-27 | 1990-12-25 | Proprietary Technology, Inc. | Force and elapsed time recording assembly |
US4903254A (en) * | 1989-08-31 | 1990-02-20 | Haas David J | Time indicator enhancement method |
WO1991004520A1 (en) * | 1989-09-20 | 1991-04-04 | Tothill, John, Compton | An automatic parking coupon |
US5317987A (en) * | 1989-11-02 | 1994-06-07 | Badische Tabakmanufaktur Roth-Handle Gmbh | Indicator for display of elapsed times and/or of the moment when changes of state occur |
US5058088A (en) * | 1990-01-04 | 1991-10-15 | Haas Sandra F | Time indicator |
US5719828A (en) * | 1990-01-04 | 1998-02-17 | Temtec, Inc. | Patterned indicators |
US5107470A (en) * | 1990-03-12 | 1992-04-21 | Note/Worthy Products, Inc. | Fast-acting time color indicator |
US5974003A (en) * | 1990-03-12 | 1999-10-26 | Pedicano; Ernest A. | Hidden message indicator |
US5364132A (en) * | 1991-02-04 | 1994-11-15 | S.J.A. Trust | Method for assembly and activation of a reusable security identification badge |
WO1993000669A1 (en) * | 1991-06-27 | 1993-01-07 | Haas David J | Patterned indicators |
US5976881A (en) * | 1992-05-28 | 1999-11-02 | Colormetric Laboratories, Inc. | Device and method for detecting chemical breakthrough of protective clothing |
GB2271000A (en) * | 1992-09-24 | 1994-03-30 | Michael Francis Isaacs | Status monitoring device. |
US6395551B1 (en) | 1994-02-16 | 2002-05-28 | 3M Innovative Properties Company | Indicator for liquid disinfection or sterilization solutions |
US5756356A (en) * | 1995-03-31 | 1998-05-26 | Toyo Ink Manufacturing Co., Ltd. | Method of indicating time or temperature-time accumulated value as color change, and materials therefor |
US5602804A (en) * | 1995-08-03 | 1997-02-11 | Temtec Inc | Long term rapid color changing time indicator |
US5633836A (en) * | 1995-12-04 | 1997-05-27 | Noteworthy Products, Inc. | Accelerated development time-delayed message system |
WO1997042551A1 (en) | 1996-05-06 | 1997-11-13 | Temtec, Inc. | Long-term rapid color changing time indicator employing dye absorbing viewing layer |
GB2344101B (en) * | 1998-11-26 | 2002-09-11 | Brent Lee Taylor | Time indicator for packaging closures |
FR2795533A1 (en) | 1999-06-22 | 2000-12-29 | Science Et Tec | Method for measuring fixed period of time for vehicle parking purposes by using non-miscible liquids that after initial shaking separates after set time period |
US6314907B1 (en) | 1999-08-02 | 2001-11-13 | Optiva | Device use indicator |
EP1268178A4 (en) * | 2000-03-02 | 2003-04-16 | Lifelines Technology Inc | Activatable time-temperature indicator system |
EP1268178A1 (en) * | 2000-03-02 | 2003-01-02 | Lifelines Technology, Inc. | Activatable time-temperature indicator system |
US6741523B1 (en) | 2000-05-15 | 2004-05-25 | 3M Innovative Properties Company | Microstructured time dependent indicators |
US6428748B1 (en) | 2001-01-31 | 2002-08-06 | Grouptek, Inc. | Apparatus and method of monitoring an analyte |
US6576474B2 (en) | 2001-01-31 | 2003-06-10 | Grouptek, Inc. | Apparatus and method of monitoring an analyte |
US7472667B2 (en) * | 2001-12-19 | 2009-01-06 | Sumitomo Chemical Co., Ltd. | Period indicator |
US20050078013A1 (en) * | 2001-12-19 | 2005-04-14 | Yoshihide Mochizuki | Period indicator |
US20040013839A1 (en) * | 2002-03-07 | 2004-01-22 | Ko Chan U. | Color changing device for time indicating label and methods of making and using the same |
US7294379B2 (en) * | 2002-03-07 | 2007-11-13 | Avery Dennison Corporation | Color changing device for time indicating label and methods of making and using the same |
US6916116B2 (en) | 2002-04-03 | 2005-07-12 | 3M Innovative Properties Company | Time or time-temperature indicating articles |
US20030214997A1 (en) * | 2002-04-03 | 2003-11-20 | Diekmann Timothy J. | Time or time-temperature indicating articles |
US8672362B1 (en) | 2002-10-01 | 2014-03-18 | Brady Worldwide, Inc. | Single-piece tag |
US8056498B2 (en) * | 2002-10-01 | 2011-11-15 | Brady Worldwide, Inc. | Inspection and testing indicator |
US20110129394A1 (en) * | 2002-10-01 | 2011-06-02 | Robert Holt | Inspection and testing indicator |
US20050141348A1 (en) * | 2003-12-31 | 2005-06-30 | Adamy Steven T. | Timing device |
US7434535B2 (en) * | 2003-12-31 | 2008-10-14 | Church & Dwight Co., Inc. | Timing device |
US9448182B2 (en) | 2004-11-08 | 2016-09-20 | Freshpoint Quality Assurance Ltd. | Time-temperature indicating device |
US20080025154A1 (en) * | 2004-11-30 | 2008-01-31 | Macdonald John G | Visual indicator chronograph and the use of the same |
US7280441B2 (en) | 2004-11-30 | 2007-10-09 | Kimberly-Clark Worldwide, Inc. | Visual indicator chronograph and the use of the same |
US20060114754A1 (en) * | 2004-11-30 | 2006-06-01 | Macdonald John G | Visual indicator chronograph and the use of the same |
US20080210152A1 (en) * | 2005-01-21 | 2008-09-04 | John Robinson | Open Life Indicator Label for Food Produce and Suchlike |
WO2006077413A3 (en) * | 2005-01-21 | 2007-05-31 | Dynamic Input Ltd | Open life indicator label for food produce and suchlike |
WO2006077413A2 (en) * | 2005-01-21 | 2006-07-27 | Intray Ltd | Open life indicator label for food produce and suchlike |
US20060274606A1 (en) * | 2005-06-03 | 2006-12-07 | Wesley Fields | Particle-based time indicator and method for its use |
US7829181B2 (en) | 2005-08-31 | 2010-11-09 | Kimberly-Clark Worldwide, Inc. | Solvatochromic visual indicator and the use of the same |
US20070048503A1 (en) * | 2005-08-31 | 2007-03-01 | Macdonald John G | Solvatochromic visual indicator and the use of the same |
US20100084347A1 (en) * | 2006-10-08 | 2010-04-08 | H2Q Water Industries | Fluid filter monitoring device |
US8790512B2 (en) | 2006-10-08 | 2014-07-29 | Strauss Water Ltd. | Fluid filter monitoring device |
US20090043168A1 (en) * | 2007-08-09 | 2009-02-12 | Israel Ramos | Self-releasing tourniquet and method |
US8343437B2 (en) | 2008-06-04 | 2013-01-01 | Jp Laboratories, Inc. | Monitoring system based on etching of metals |
EP3293493A1 (en) | 2008-06-04 | 2018-03-14 | G Patel | A monitoring system based on etching of metals |
US20100043694A1 (en) * | 2008-08-20 | 2010-02-25 | Patel Gordhanbhai N | Tamper evident indicating devices |
US20100263244A1 (en) * | 2009-04-16 | 2010-10-21 | Nelson Tabirian | Labels and taggants with programmable multi color coded timing |
US9034192B2 (en) | 2009-09-09 | 2015-05-19 | Strauss Water Ltd. | Liquid filter device |
US20190257695A1 (en) * | 2012-06-15 | 2019-08-22 | Freshpoint Quality Assurance Ltd. | Time and/or Temperature Sensitive Devices and Methods of Use Thereof |
US10816410B2 (en) * | 2012-06-15 | 2020-10-27 | Freshpoint Quality Assurance Ltd. | Time and/or temperature sensitive devices and methods of use thereof |
US20210080331A1 (en) * | 2012-06-15 | 2021-03-18 | Freshpoint Quality Assurance Ltd. | Time and/or Temperature Sensitive Devices and Methods of Use Thereof |
US20210285825A1 (en) * | 2012-06-15 | 2021-09-16 | Freshpoint Quality Assurance Ltd. | Time and/or Temperature Sensitive Devices and Methods of Use Thereof |
US11788897B2 (en) * | 2012-06-15 | 2023-10-17 | Freshpoint Quality Assurance Ltd. | Time and/or temperature sensitive devices and methods of use thereof |
US11821798B2 (en) * | 2012-06-15 | 2023-11-21 | Freshpoint Quality Assurance Ltd. | Time and/or temperature sensitive devices and methods of use thereof |
WO2015112679A1 (en) | 2014-01-27 | 2015-07-30 | Jp Laboratories, Inc | Indicating devices based on lateral diffusion of a mobile phase through a non-porous stationary phase |
US10046981B2 (en) | 2015-03-23 | 2018-08-14 | Strauss Water Ltd. | Water filter and assembly thereof |
US11398167B2 (en) * | 2016-07-11 | 2022-07-26 | Intray Ltd. | Time temperature indicator label |
US11002611B2 (en) | 2018-01-29 | 2021-05-11 | Timestrip Uk Limited | Elapsed time temperature indicator and method of activation and use |
WO2020183185A1 (en) * | 2019-03-13 | 2020-09-17 | Singh Arwinder | Transdermal patch |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3520124A (en) | Timer device | |
US6373786B1 (en) | Cap for a hermetically sealed container | |
US5602804A (en) | Long term rapid color changing time indicator | |
AU659138B2 (en) | Security identification badge | |
US3811840A (en) | Test device for detecting low concentrations of substances in fluids | |
US4038485A (en) | Test composition, device, and method | |
US5446705A (en) | Time indicator having discrete adhesive | |
EP0198011B1 (en) | Field assay for ligands | |
GB1222035A (en) | Pressure-sensitive record material | |
EP0906591A1 (en) | Long-term rapid color changing time indicator employing dye absorbing viewing layer | |
IE40209B1 (en) | Package integrity indicator | |
JPS6472066A (en) | Assay device provided with ports | |
US5411888A (en) | In vitro test for dermal corrosive properties | |
AU6539774A (en) | Liquid level detecting and indicating system for vehicle | |
EP0299359A3 (en) | Reagent delivery system for use in solid-phase analytical devices | |
WO2012141594A1 (en) | Time-temperature indicator system | |
AU2001252812B2 (en) | Assay device with timer function | |
FR2503317B1 (en) | QUICK RELEASE VALVE, PARTICULARLY FOR VEHICLE BRAKING DEVICE | |
AU5256096A (en) | Microencapsulation process | |
ES267379U (en) | Defrosting indicator | |
EP0117424A3 (en) | Improved temperature-responsive pacifier assembly | |
IE44834L (en) | Determining lipase activity | |
JPS59106501A (en) | Diaper type wear article | |
JPS5518218A (en) | Removal of excess formaldehyde in dispersion liquid having microcapsule dispersed therein | |
Horton et al. | Synthesis of 8-(methoxycarbonyl) octyl glycosides of O-alpha-L-rhamno-pyranosyl-(1 goes to 3)-O-alpha-L-rhamnopyranosyl-(1 goes to 3)-2-acetamido-2, 6-dideoxy-D-glucopyranose; models for the antigen of Pseudomonas aeruginosa Fisher immunotype 5 |