Self-charging electronic timepiece
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United States of America Patent
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Mar 31, 1987
Grant Date -
N/A
app pub date -
Nov 19, 1984
filing date -
Nov 21, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electronic timepiece including timekeeping circuitry and a primary power source for converting externally applied energy to electrical energy for powering the timekeeping circuitry. The electronic timepiece also includes a secondary power source for storing energy from the primary power source and powering the timekeeping circuitry. A power controller, coupled to the timekeeping circuitry, primary power source and secondary power source controls the source of power of the timekeeping means so that upon the application of external energy to the primary power source, when the timepiece is not operating in the secondary power source and cannot power the timekeeping circuitry the timepiece begins operating substantially simultaneously.
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