Patent US3943697A successfully refreshed from Google Patents.
US3943697A
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Electronic watch
Assignee: Suwa Seikosha KK
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Filing: 1974-08-30
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Granted: 1976-03-16
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Expires: 1994-08-30
Abstract
Abstract An electronic watch including an electronic divider for dividing the high frequency output signal of a standard oscillator into low frequency timing signals. The oscillator and divider are driven by a battery having a capacitor fixedly connected in parallel therewith to serve as a voltage source during temporary disconnection of the battery.
Inventors
- 👤 Kinji Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:14
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/14; G04C3/08; G04C3/10; G04C3/108
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
An electronic watch comprising time standard oscillator means for producing a high frequency signal; electronic divider means coupled to said standard oscillator means for dividing said high frequency signal into low frequency timing signals having a period of one second; driving circuit means operatively coupled to said divider means for receiving said one second timing signals and producing one second motor driving signals; pulse motor means operating at peak currents of at least 300 μ amps and including driving coil means electrically coupled to said driving circuit means for receiving said motor driving signals; a button battery releasably mounted in said watch and operatively coupled to said oscillator means, divider means and driving circuit means for driving same by applying thereto a substantially constant voltage; and a capacitor having a capacitance of at least 1 μF fixedly mounted in said watch and connected in parallel with said battery means for serving as a constant voltage source for applying a constant voltage to said oscillator means, divider means, and driving circuit means during momentary disconnections of said battery means.
Claim 2
Dependent Claim
178 words
An electronic watch comprising time standard oscillator means for producing a high frequency signal; electronic divider means coupled to said standard oscillator means for dividing said high frequency signal into low frequency timing signals having a period of one second; driving circuit means operatively coupled to said divider means for receiving said one second timing signals and producing one second motor driving signals; pulse motor means operating at peak currents of at least 300 μ amps and including driving coil means electrically coupled to said driving circuit means for receiving said motor driving signals; a button battery releasably mounted in said watch and operatively coupled to said oscillator means, divider means and driving circuit means for driving same by applying thereto a substantially constant voltage; and a capacitor having a capacitance of at least 1 μF fixedly mounted in said watch and connected in parallel with said battery means for serving as a constant voltage source for applying a constant voltage to said oscillator means, divider means, and driving circuit means during momentary disconnections of said battery means.
References Cited (Backward Citations)
US3560998A
Cited
US3672155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |