Patent US3809831A successfully refreshed from Google Patents.
US3809831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Program timer assembly with improved cam disc face circumferential grooves for abrupt radial displacement
Assignee: Sarkes Tarzian Inc
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Filing: 1973-03-01
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Granted: 1974-05-07
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Expires: 1993-03-01
Abstract
Abstract There is provided a timing device of the type suitable for controlling the cycling of appliances and the like. The timing device includes an axially restrained cam disc having a plurality of circumferential cam tracks a plurality of switch blades is provided having cam follower means adapted to engage selected ones of the cam tracks. A drive is provided which may be ratcheted to provide for manual overdrive or advance of the cam disc. Moreover a line switch is provided controlled by axially translation of the control shaft. Switching means may be provided for automatically disengaging the line switch upon completion of an operating cycle.
Inventors
- 👤 G Godwin
- 👤 W Wagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:53
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/10; H01H43/106; H01H43/12; H01H43/125
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A timing device comprising: a housing, an axially restrained cam disc mounted on a control shaft in the housing, said disc having a plurality of circumferential grooves formed in at least one of its faces defining radially modulated circumferential cam tracks, a plurality of switch blades within said housing, and cam follower means associated with at least some of said switch blades engaging selected ones of said cam tracks radially movable in response to the radial modulation of said tracks, at least some of said switch blades having electrical terminal means associated therewith for making electrical connection thereto.
Claim 2
Dependent Claim
98 words
A timing device comprising: a housing, an axially restrained cam disc mounted on a control shaft in the housing, said disc having a plurality of circumferential grooves formed in at least one of its faces defining radially modulated circumferential cam tracks, a plurality of switch blades within said housing, and cam follower means associated with at least some of said switch blades engaging selected ones of said cam tracks radially movable in response to the radial modulation of said tracks, at least some of said switch blades having electrical terminal means associated therewith for making electrical connection thereto.
Claim 3
Dependent Claim
44 words
A timing device as set forth in claim 1 wherein the other face of said cam disc contains circumferential grooves defining cam tracks, and another plurality of said switch blades are provided within said housing, at least some of which include cam follower means.
Claim 4
Dependent Claim
36 words
A timing device as set forth in claim 1 wherein said cam disc is provided with gear teeth in its peripheral face, and drive means are provided including a drive gear operatively driving said gear teeth.
Claim 5
Dependent Claim
50 words
A timing device as set forth in claim 3 wherein said drive gear is mounted on a pivotally mounted gear plate pivotable toward and away from said gear teeth to disengage from said gear teeth upon rotation of said cam disc in a first direction to override said drive gear.
Claim 6
Dependent Claim
45 words
A timing device as set forth in claim 4 and including locking means axially movable with said shaft movable into locking engagement with said gear plate maintaining said drive gear in engagement with said gear teeth in a first axial position of said control shaft.
Claim 7
Dependent Claim
51 words
A timing device as set forth in claim 1 and wherein said cam disc is provided with a center bore having at least one keyway, said control shaft is axially movable within said bore relative to said cam disc and keyed with said keyway for radial movement with said cam disc.
Claim 8
Dependent Claim
33 words
A timing device as set forth in claim 6 and including an additional switch blade operatively associated with said control shaft for movement in response to the axial position of said control shaft.
Claim 9
Dependent Claim
76 words
A timing device as set forth in claim 7 said shaft is provided with a circumferential cam and additionally including an actuator assembly restrained axially and having a cam follower operatively associated with the last mentioned cam for radial movement in response to axial movement of said shaft, said additional switch blade being operatively connected with said actuator assembly to move radially relative to said control shaft in response to axial movement of said control shaft.
Claim 10
Dependent Claim
64 words
A timing device as set forth in claim 6 and including switching means responsive to the radial position of said control shaft for moving said control shaft axially from a first axial position to a second axial position, said switching means including a cam and a cam follower carried by said shaft to move said shaft from a first position to a second position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |