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US 3,943,697 AGranted
Electronic watch
AssigneeKabushiki Kaisha Suwa Seikosha
InventorKinji Fujita
Life of this patent
Estimating the term…
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.
Claims1
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 .mu. 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 .mu.F 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.
2 more elements
Dependencies are inferred from the claim text.