CA1264348A - Timing mechanism - Google Patents
Timing mechanismInfo
- Publication number
- CA1264348A CA1264348A CA000496798A CA496798A CA1264348A CA 1264348 A CA1264348 A CA 1264348A CA 000496798 A CA000496798 A CA 000496798A CA 496798 A CA496798 A CA 496798A CA 1264348 A CA1264348 A CA 1264348A
- Authority
- CA
- Canada
- Prior art keywords
- electrical contact
- cams
- electrical
- leg
- individual
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
- H01H43/10—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
- H01H43/12—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation
- H01H43/125—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation using a cam
Abstract
TIMING MECHANISM
Abstract of Disclosure A motor driven rotatable camstack includes at least two cams. A V-shaped electrical terminal blade spans the two cams. Each leg of the V-shaped electrical terminal includes a cam follower which individually engages one of the cams. Two individual spring electrical contact blades are positioned on one side of the cams to cooperate with one leg of the V-shaped electrical terminal and a single spring electrical contact blade is positioned on the other side of the V-shaped terminal to cooperate with the other leg.
Abstract of Disclosure A motor driven rotatable camstack includes at least two cams. A V-shaped electrical terminal blade spans the two cams. Each leg of the V-shaped electrical terminal includes a cam follower which individually engages one of the cams. Two individual spring electrical contact blades are positioned on one side of the cams to cooperate with one leg of the V-shaped electrical terminal and a single spring electrical contact blade is positioned on the other side of the V-shaped terminal to cooperate with the other leg.
Description
i26~3 Background of the Invention The present invention relates to a timing nlechdnism and nlore particularly to a timing mechanism that provides a single and a double upper circuit for controlling the function of an appliance.
Timing mechanisms have been used for many years to control the functions of dishwashers, washers, and dryers. In such applications, it is sometimes necessary to provide several circuits between the timing mechanism and the appliance to perform several functions. In the present invention, a single and a double upper circuit have been provided in a very simple and economical manner.
Summary of the Invention Accordingly, there is provided a timing mechanism which in general comprises a motor driven rotatable camstack which includes at least two individual cams; aV-shaped electrical terminal blade providing individual first and second legs extending from a common first electrical terminal and spanning the two individual cams, each of the first and second legs including individual cam followers, one each engaging one of the two individual cams, and an electrical contact carried at each of the first and second legs; two iniividual spring electrical contact blades having electrical contacts in operable position with the first leg and with eachother, and each electrically connected to a second and third electrical terminal;
and a single spring electrical contact blade having an electrical contact in operable position with an electrical contact of the second leg and electrically connected to a fourth electrical terminal.
Description of the Drawings Figure 1 is a front view of a timing mechanism showing the features of the invention.
Fiyure 2 is a partial section taken along the line 2-2 of Figure 1.
Detailed Description of the Invention Referring now to the drawings, a detailed illustration of timing mechanism 10 is shown. Timing mechanism 10, in general, includes a plurality of cams 1 and 2carried on a cam shaft 12 which is journalled for rotation in end plate 14 and the 12~348 r~ase 16 of cup shaped housing 18, and electrical switch nneans 26 which individua11y engage the cams to be rotated thereby. The cams are rotated by a motor drive means 20 through a clutch means 22 and gear 24 which is engaged by the clutch means, gear 24 being fixedly carried on shaft 12 to cduse rotation thereof.
Clutch means 22 permits manual rotation of the shaft independent of the motor drive means.
Motor drive means 20 includes motor 21 having an output pinion 28 and a gear train 30 which includes a series of gears and pinions coupled between motor output pinion 28 and gear train output pinion 32. Output pinion 32 meshes with gear 24to cause rotation of the gear and shaft 12. Rotation of shaft 12 causes rotation of cams 1 and 2 to open and close the corresponding switch means 26 to control the functions of the appliance in accordance with a program provided by the cams.
In accordance with the present invention, a single circuit and a double upper ;circuit is very simply and economically provided by switch means 26. A V-shapedelectrical terminal blade 31 has two legs 33 and 34 spanning at least a portion of the two cams 1 and 2. Each leg has a cam follower 36 and 38 which individually engages one of the cams. In the present embodiment, follower 36 engages cam 2 while tollower 38 engages cam 1. Each leg has an electrical contact 40 and 42 carried at its distal end. The V-shaped electrical blade extends from a common electrical terminal 44.
A single circuit is provided by a spring blade 46 which cooperates with leg 33. The single blade extends from an electrical terrninal 48 and has an electrical contact 50 at its distal end. A stop means comprising a post 52 limits the blade's travel when the blade is in its relaxed position. When cams 1 and 2 arerotated, follower 36 will engage an outer lobe 2' to close the switch.
A double upper circuit is provided by spring blades 54 and 56 which cooperate with each other and with leg 34 of the V-shaped spring blade.
Spring blade 54 is connected to electrical terminal 57 and has an electrical contact 58 at its distal end while spring blade 56 is connected to electrical i~;4~4t~
terminal 60 and has an electrical contact 62 dt its distal end. Rotation of the cams causes follower 38 to leave its open position defined by step 1' and to engage lobe 1" to close contacts 42 and 58 with further rotation causing the follower to engage lobe 1 "' to cause contact 58 to also engage contact 62.
Spring blades 54 and 56 are limited in their relaxed position through stop means which include posts 64 and 66.
Timing mechanisms have been used for many years to control the functions of dishwashers, washers, and dryers. In such applications, it is sometimes necessary to provide several circuits between the timing mechanism and the appliance to perform several functions. In the present invention, a single and a double upper circuit have been provided in a very simple and economical manner.
Summary of the Invention Accordingly, there is provided a timing mechanism which in general comprises a motor driven rotatable camstack which includes at least two individual cams; aV-shaped electrical terminal blade providing individual first and second legs extending from a common first electrical terminal and spanning the two individual cams, each of the first and second legs including individual cam followers, one each engaging one of the two individual cams, and an electrical contact carried at each of the first and second legs; two iniividual spring electrical contact blades having electrical contacts in operable position with the first leg and with eachother, and each electrically connected to a second and third electrical terminal;
and a single spring electrical contact blade having an electrical contact in operable position with an electrical contact of the second leg and electrically connected to a fourth electrical terminal.
Description of the Drawings Figure 1 is a front view of a timing mechanism showing the features of the invention.
Fiyure 2 is a partial section taken along the line 2-2 of Figure 1.
Detailed Description of the Invention Referring now to the drawings, a detailed illustration of timing mechanism 10 is shown. Timing mechanism 10, in general, includes a plurality of cams 1 and 2carried on a cam shaft 12 which is journalled for rotation in end plate 14 and the 12~348 r~ase 16 of cup shaped housing 18, and electrical switch nneans 26 which individua11y engage the cams to be rotated thereby. The cams are rotated by a motor drive means 20 through a clutch means 22 and gear 24 which is engaged by the clutch means, gear 24 being fixedly carried on shaft 12 to cduse rotation thereof.
Clutch means 22 permits manual rotation of the shaft independent of the motor drive means.
Motor drive means 20 includes motor 21 having an output pinion 28 and a gear train 30 which includes a series of gears and pinions coupled between motor output pinion 28 and gear train output pinion 32. Output pinion 32 meshes with gear 24to cause rotation of the gear and shaft 12. Rotation of shaft 12 causes rotation of cams 1 and 2 to open and close the corresponding switch means 26 to control the functions of the appliance in accordance with a program provided by the cams.
In accordance with the present invention, a single circuit and a double upper ;circuit is very simply and economically provided by switch means 26. A V-shapedelectrical terminal blade 31 has two legs 33 and 34 spanning at least a portion of the two cams 1 and 2. Each leg has a cam follower 36 and 38 which individually engages one of the cams. In the present embodiment, follower 36 engages cam 2 while tollower 38 engages cam 1. Each leg has an electrical contact 40 and 42 carried at its distal end. The V-shaped electrical blade extends from a common electrical terminal 44.
A single circuit is provided by a spring blade 46 which cooperates with leg 33. The single blade extends from an electrical terrninal 48 and has an electrical contact 50 at its distal end. A stop means comprising a post 52 limits the blade's travel when the blade is in its relaxed position. When cams 1 and 2 arerotated, follower 36 will engage an outer lobe 2' to close the switch.
A double upper circuit is provided by spring blades 54 and 56 which cooperate with each other and with leg 34 of the V-shaped spring blade.
Spring blade 54 is connected to electrical terminal 57 and has an electrical contact 58 at its distal end while spring blade 56 is connected to electrical i~;4~4t~
terminal 60 and has an electrical contact 62 dt its distal end. Rotation of the cams causes follower 38 to leave its open position defined by step 1' and to engage lobe 1" to close contacts 42 and 58 with further rotation causing the follower to engage lobe 1 "' to cause contact 58 to also engage contact 62.
Spring blades 54 and 56 are limited in their relaxed position through stop means which include posts 64 and 66.
Claims (3)
1. A timing mechanism comprising:
a) a motor driven rotatable camstack, said camstack including at least two individual cams, b) a V-shaped electrical terminal blade providing individual first and second legs extending from a common first electrical terminal and spanning at least a portion of said two cams, each of said first and second legs including individual cam followers, one each engaging one of said two individual cams, andelectrical contacts carried at a distal end of said legs, c) two individual spring electrical contact blades having electrical contacts in operable position with an electrical contact of said first leg and with each other, and electrically connected to a second and third electrical terminal, and d) a single spring electrical contact blade having an electrical contact in operable position with an electrical contact of said second leg and electrically connected to a fourth electrical terminal.
a) a motor driven rotatable camstack, said camstack including at least two individual cams, b) a V-shaped electrical terminal blade providing individual first and second legs extending from a common first electrical terminal and spanning at least a portion of said two cams, each of said first and second legs including individual cam followers, one each engaging one of said two individual cams, andelectrical contacts carried at a distal end of said legs, c) two individual spring electrical contact blades having electrical contacts in operable position with an electrical contact of said first leg and with each other, and electrically connected to a second and third electrical terminal, and d) a single spring electrical contact blade having an electrical contact in operable position with an electrical contact of said second leg and electrically connected to a fourth electrical terminal.
2. A timing mechanism according to claim 1 further including stop means limiting the travel of said two spring electrical contact means in their relaxed position.
3. A timing mechanism according to claim 2 further including stop means limiting the travel of said single electrical contact blade in their relaxed position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/737,934 US4575594A (en) | 1985-05-28 | 1985-05-28 | Timing mechanism |
| US06/737,934 | 1985-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1264348A true CA1264348A (en) | 1990-01-09 |
Family
ID=24965871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000496798A Expired CA1264348A (en) | 1985-05-28 | 1985-12-03 | Timing mechanism |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4575594A (en) |
| CA (1) | CA1264348A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841496A (en) * | 1987-12-17 | 1989-06-20 | Emhart Industries, Inc. | Appliance timer |
| US10504673B2 (en) * | 2017-09-22 | 2019-12-10 | Lg Electronics Inc. | Switch device comprising two switches which share a common conductor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3436498A (en) * | 1967-02-15 | 1969-04-01 | Mallory & Co Inc P R | Flex-shaft switch |
| US3581028A (en) * | 1969-11-20 | 1971-05-25 | Dynamics Corp America | Liquidizer timer jogger with improved drive means including lost motion connection |
| US3818157A (en) * | 1973-03-26 | 1974-06-18 | Mallory & Co Inc P R | Dual cam pulse timer switch |
| US4103119A (en) * | 1976-10-12 | 1978-07-25 | P. R. Mallory & Co. Inc. | Timing mechanism having independently operated plural cam assemblies |
| US4123915A (en) * | 1977-05-16 | 1978-11-07 | Amf Incorporated | Defrost timer having selectable defrost time |
| US4292482A (en) * | 1979-12-03 | 1981-09-29 | Emhart Industries, Inc. | Circuit controller for anti-wrinkle control |
| US4463225A (en) * | 1982-09-30 | 1984-07-31 | The Singer Company | Dryer timer |
-
1985
- 1985-05-28 US US06/737,934 patent/US4575594A/en not_active Expired - Lifetime
- 1985-12-03 CA CA000496798A patent/CA1264348A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4575594A (en) | 1986-03-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121205 |