Reduction of energy consumption of electronic timepiece

Details Reduction of energy consumption of electronic timepiece Reduction of energy consumption of electronic timepiece

1979-06-20

1981-07-28

Weldon, Ulysses

Horology: time measuring systems or devices

Chronological

With power monitor

368 76, 368 80, 368 85, 368 86, G04B 900

Patent

active

042814057

ABSTRACT:
Reduces the consumption of an electronic time piece equipped with a motor 4 driving a display unit 5. A quartz oscillator 1 feeds a supply circuit 3 through a frequency divider 2. The supply circuit 3 of the motor and its control circuit 9 periodically decrease the pulse energy supplied to the motor in response to a reference signal 8.2 provided by a reference counter say every 60 seconds. The energy then supplied to the motor is regulated as a function of the presence or absence of a signal delivered by a detection switch 7 operated by the display unit. If the detection switch does not close, compensating pulses are fed to the motor to catch up the lost seconds and the pulse energy is stepped up.

REFERENCES:
patent: 3812670 (1974-05-01), Nikaido et al.
patent: 3855781 (1974-12-01), Chihara et al.
patent: 3958182 (1976-05-01), Sauthier
patent: 3963946 (1976-06-01), Zajac
patent: 3992868 (1976-11-01), Tamaru et al.
patent: 4031447 (1977-06-01), Togo et al.
patent: 4032827 (1977-06-01), Dobratz et al.

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