Self-charging electronic timepiece

Details Self-charging electronic timepiece Self-charging electronic timepiece

1989-03-28

1995-09-26

Roskoski, Bernard

Horology: time measuring systems or devices

Power supply details

Electrical

320 2, 323906, G04B 100, G04B 300

Patent

active

RE0350435

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.

REFERENCES:
patent: 3968417 (1976-07-01), Dials
patent: 4040247 (1977-08-01), Haydon
patent: 4237385 (1980-12-01), Jurgens et al.
patent: 4316275 (1982-02-01), Tabata
patent: 4328572 (1982-05-01), Kawahara
patent: 4354118 (1982-10-01), Spencer
patent: 4409538 (1983-10-01), Tabata
patent: 4474028 (1984-10-01), Miller et al.
patent: 4528459 (1985-10-01), Wiegel
C-MOS Applied Circuit And the Solution of Problems, CQ Publication Corporation, pp. 176-180, 1981.

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