US3651701A
Expired / Lapsed
US
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Timing gear
Assignee: Holzer Patent AG
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Filing: 1969-09-15
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Granted: 1972-03-28
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Expires: 1989-09-15
Abstract
Abstract A timing gear for the production of timing and switch movements consisting of a control cam disc and ratchets or pawls which are driven by a motor through a reduction gear by means of eccentrics and act on two sets of teeth on the cam disc, the teeth being of even pitch wherein at least two pawls are provided which engage a set of teeth on the control cam disc and are given differing strokes.
Inventors
- 👤 Walter Holzer
- 👤 Konrad Laufer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:55
CPC Classifications
F; F16; F16H; F16H31/00; F16H31/003; F16H31/004; H; H01; H01H; H01H43/00; H01H43/10; H01H43/101; H01H43/102; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1555; Y10T74/1556
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
A timing gear with a driven control cam disc having a ratchet and pawls, characterized by the fact that the control cam disc (2) has on its circumference a first set of teeth (5) and a second set of teeth (6), a first pawl (22) engaging the first set of teeth (5) and a second pawl (23) engaging the second set of teeth (6), an eccentric (13) on which said first pawl (22) is mounted, a shaft 25 driving said eccentric, said second pawl (23) having a slot (26) therein, a spring (29) acting to press said second pawl against the second set of teeth (6), a stop (32) on said second pawl (23), said shaft (25) extending through the slot (26), an eccentric cam (27) fastened firmly to said shaft (25), said stop (32) resting against said eccentric cam (27), so that a uniform driving of the shaft (25) will result in the control cam disc (2) being driven through the first set of teeth (5) and pawl (22) uniformly in small steps and through the second set of teeth (6) and the pawl (23) in larger steps and at longer time intervals.
Claim 2
Dependent Claim
194 words
A timing gear with a driven control cam disc having a ratchet and pawls, characterized by the fact that the control cam disc (2) has on its circumference a first set of teeth (5) and a second set of teeth (6), a first pawl (22) engaging the first set of teeth (5) and a second pawl (23) engaging the second set of teeth (6), an eccentric (13) on which said first pawl (22) is mounted, a shaft 25 driving said eccentric, said second pawl (23) having a slot (26) therein, a spring (29) acting to press said second pawl against the second set of teeth (6), a stop (32) on said second pawl (23), said shaft (25) extending through the slot (26), an eccentric cam (27) fastened firmly to said shaft (25), said stop (32) resting against said eccentric cam (27), so that a uniform driving of the shaft (25) will result in the control cam disc (2) being driven through the first set of teeth (5) and pawl (22) uniformly in small steps and through the second set of teeth (6) and the pawl (23) in larger steps and at longer time intervals.
Claim 3
Dependent Claim
18 words
A timing gear in accordance with claim 1 wherein the two sets of teeth have a different pitch.
Claim 4
Dependent Claim
20 words
A timing gear in accordance with claim 1 wherein the two sets of teeth have a pitch of equal size.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |