US3659413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single position date or day corrector with gravity controlled clutch
Assignee: Citizen Watch Co Ltd
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Filing: 1971-03-16
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Granted: 1972-05-02
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Expires: 1991-03-16
Abstract
Abstract In a calendar correction mechanism for a timepiece a double pawl member is freely mounted on a movable pin for pivotal movement under the influence of gravity for selective engagement with a day star wheel or a date calendar dial. A mechanical motion transmitting train is arranged between an elongated operating stem and the movable pin to shift the pawl member for transmitting step motion to either the day star wheel or the date calendar dial.
Inventors
- 👤 Kazuo Tanaka
- 👤 Toshihiko Kanayama
- 👤 Tetuya Yasuda
- 👤 Hidetaka Tutiya
- 👤 Yoshio Kikuchi
- 👤 Takeo Muto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:07
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/24; G04B19/243; G04B19/247; G04B19/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A calendar correction mechanism for a calendar timepiece, comprising a stationary member, preferably a plate, a date calendar dial rotatably mounted thereon, a day star wheel for a day calendar dial and rotatably mounted on said plate, an elongated operating stem at least slidably mounted on said plate and motion-transmitting means provided between said operating stem, on the one hand, and said date calendar dial and said star wheel, on the other hand, said correction being characterized by a gravity-operated clutch provided in said transmitting means for selectively cooperating either of said dial or said star wheel depending upon the acting direction of gravity force upon said timepiece.
Claim 2
Dependent Claim
108 words
A calendar correction mechanism for a calendar timepiece, comprising a stationary member, preferably a plate, a date calendar dial rotatably mounted thereon, a day star wheel for a day calendar dial and rotatably mounted on said plate, an elongated operating stem at least slidably mounted on said plate and motion-transmitting means provided between said operating stem, on the one hand, and said date calendar dial and said star wheel, on the other hand, said correction being characterized by a gravity-operated clutch provided in said transmitting means for selectively cooperating either of said dial or said star wheel depending upon the acting direction of gravity force upon said timepiece.
References Cited (Backward Citations)
US3470687A
Cited
US3470688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |