Patent US3408992A successfully refreshed from Google Patents.
Patent US3737597A successfully refreshed from Google Patents.
US3737597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam operated timer switch assembly with manually adjustable cam and clutch mechanism
Assignee: Duracell Inc USA
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Filing: 1971-10-20
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Granted: 1973-06-05
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Expires: 1991-10-20
Abstract
Abstract Manual axial and rotational indexing of a cam carrying shaft engages a clutch means so as to apply power driven rotation to a cam means carried by the shaft, and causes engagement of a means to retain the clutch in engagement.
Inventors
- 👤 L Jones
- 👤 R Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:00
CPC Classifications
G; G04; G04F; G04F3/00; G04F3/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
156 words
A timer comprising: a. a cam carrying shaft, b. a motor drive means, c. a cam ring including a hub carried by said cam carrying shaft, said hub having a first clutch face, and electrical switch means responsive to rotation of said cam ring, d. a gear having a second clutch face carried by said cam carrying shaft, and a coil spring disposed between said first and second clutch faces, each of said clutch faces having opposed serrations adapted to engage one another, e. a collar having an arcuate step carried by said cam carrying shaft engaging said cam ring, and f. stop means engaging said arcuate step, g. manual axial and roational indexing of said cam carrying shaft engaging said first and second clutch faces so as to apply motor driven rotation of said cam ring and engaging said stop means with said arcuate step to retain said first and second clutch faces in engagement.
Claim 2
Dependent Claim
156 words
A timer comprising: a. a cam carrying shaft, b. a motor drive means, c. a cam ring including a hub carried by said cam carrying shaft, said hub having a first clutch face, and electrical switch means responsive to rotation of said cam ring, d. a gear having a second clutch face carried by said cam carrying shaft, and a coil spring disposed between said first and second clutch faces, each of said clutch faces having opposed serrations adapted to engage one another, e. a collar having an arcuate step carried by said cam carrying shaft engaging said cam ring, and f. stop means engaging said arcuate step, g. manual axial and roational indexing of said cam carrying shaft engaging said first and second clutch faces so as to apply motor driven rotation of said cam ring and engaging said stop means with said arcuate step to retain said first and second clutch faces in engagement.
Claim 3
Dependent Claim
22 words
A timer according to claim 1 wherein said stop means includes a spring member connected to a wall of the timer housing.
Claim 4
Dependent Claim
17 words
A timer according to claim 2 wherein said spring member is a blade contilevered from said wall.
Claim 5
Dependent Claim
119 words
A timer comprising: a. cam carrying shaft, b. a motor drive means, c. cam means rotatably carried by said cam carrying shaft, and electrical switch means responsive to rotation of said cam means, d. clutch means coupling said cam means to said motor drive means, e. a collar having an arcuate step carried by said cam carrying shaft engaging said cam means, and f. a spring blade connected to a wall of a housing for the timer, g. manual axial and rotational indexing of said cam carrying shaft engaging said clutch means so as to apply motor driven rotation to said cam means and engaging said spring blade with said arcuate step to retain said clutch means in engagement.
Claim 6
Dependent Claim
119 words
A timer comprising: a. cam carrying shaft, b. a motor drive means, c. cam means rotatably carried by said cam carrying shaft, and electrical switch means responsive to rotation of said cam means, d. clutch means coupling said cam means to said motor drive means, e. a collar having an arcuate step carried by said cam carrying shaft engaging said cam means, and f. a spring blade connected to a wall of a housing for the timer, g. manual axial and rotational indexing of said cam carrying shaft engaging said clutch means so as to apply motor driven rotation to said cam means and engaging said spring blade with said arcuate step to retain said clutch means in engagement.
Claim 7
Dependent Claim
24 words
A timer according to claim 4 wherein said spring blade includes a tab carried at its free end, said tab engaging said arcuate step.
Claim 8
Dependent Claim
24 words
A timer according to claim 5 wherein said collar has a ridge engaging said spring blade to move it out of said arcuate step.
Claim 9
Dependent Claim
66 words
A timer according to claim 4 wherein said cam means includes a cam ring carried by a hub having a clutch face carried by said cam carrying shaft; and said clutch means includes a gear having a clutch face carried by said cam carrying shaft, each of said clutch faces having opposed serrations adapted to engage one another, and a coil spring disposed between said faces.
Claim 10
Dependent Claim
26 words
A timer according to claim 7 wherein said clutch means further includes a spring means disposed between said gear and an end wall of said timer.
Claim 11
Dependent Claim
22 words
A timer according to claim 4 wherein said hub engages an aperture of said cam which is slightly larger than said hub.
Claim 12
Dependent Claim
30 words
A timer according to claim 4 wherein said electrical switch means includes fixed and moveable contact blades cantilevered in a wall of the timer housing and having cooperating electrical contacts.
Claim 13
Dependent Claim
43 words
A timer according to claim 10 further including a shelf means disposed at the free end of said blades and carried by a wall of the timer housing for limiting the travel of said moveable blade and for maintaining alignment of the blades.
Claim 14
Dependent Claim
30 words
A timer according to claim 11 wherein said shelf means includes a base, and L-shaped member extending from said base engaging said wall, and a wedge carried by said base.
References Cited (Backward Citations)
US3546557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |