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US4182114A
Expired / Lapsed
US
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Time-piece with electric motor driven display and planetary motion work
Assignee: SSIH Management Services SA
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Filing: 1977-07-11
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Granted: 1980-01-08
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Expires: 1997-07-11
Abstract
Abstract An electrically energized timepiece movement is provided with motion work the form of a planetary train entirely supported on the frame of a driving motor. Coaxial planet pinions are excentrically located on a minute wheel, one planet pinion engaging a fixed central gear and the other engaging the hour wheel.
Inventors
- 👤 Pierre-Luc Gagnebin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:32
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/14; G04B; G04B13/00; G04B13/007; G04B13/008; G04B19/00; G04B19/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A wristwatch movement including an electric motor arranged to transmit motion to a minute hand and an hour hand wherein the motion work comprises a planetary train having a central minute wheel directly driven from the motor, said central minute wheel bearing a pair of eccentrically located coaxial planet pinions which are fixed for rotation together and one of which engages a fixed central gear and the other of which engages an hour wheel.
Claim 2
Dependent Claim
74 words
A wristwatch movement including an electric motor arranged to transmit motion to a minute hand and an hour hand wherein the motion work comprises a planetary train having a central minute wheel directly driven from the motor, said central minute wheel bearing a pair of eccentrically located coaxial planet pinions which are fixed for rotation together and one of which engages a fixed central gear and the other of which engages an hour wheel.
Claim 3
Dependent Claim
26 words
A wristwatch movement as set forth in claim 1 wherein the entire motion work is supported by the motor thereby to eliminate the conventional base plate.
Claim 4
Dependent Claim
26 words
A wristwatch movement as set forth in claim 2 wherein the motor cage is provided with a bracket to which a support arbor is fixedly mounted.
Claim 5
Dependent Claim
44 words
A wristwatch movement as set forth in claim 3 wherein the support arbor has the central gear immovably fixed thereto and in addition provides a rotative support for the central minute wheel and the hour wheel, said central gear and said wheels being coaxial.
Claim 6
Dependent Claim
55 words
A wristwatch movement as set forth in claim 1 wherein a shaft bearing extends through said central minute wheel and carries a shaft freely rotatable therein, a planet pinion being fixed on each end of the shaft whereby rotation of the said central minute wheel effects rotation of the planet pinions and the hour wheel.
Claim 7
Dependent Claim
26 words
A wristwatch movement as set forth in claim 1 wherein an electronic circuit controlled by a quartz crystal time standard provides driving pulses to the motor.
Claim 8
Dependent Claim
16 words
A wristwatch movement as set forth in claim 6 wherein the motor comprises a stepping motor.
Claim 9
Dependent Claim
17 words
A wristwatch movement as set forth in claim 7 wherein the motor is stepped once per minute.
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) | 1983-01-07 | 1983-07-09 | 1984-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-07 | 1987-07-09 | 1988-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-07 | 1991-07-09 | 1992-01-08 | $7700.00 | Window Closed / Lapsed |