Electronic watch

Details Electronic watch Electronic watch

1976-12-23

1978-04-18

Jackmon, Edith S.

58 23R, 58 23D, 58 855, G04B 1930, G04C 300, G04B 2700

Patent

active

040844048

ABSTRACT:
A frequency divider divides a sonic or ultrasonic time base frequency to provide signals with a frequency of N/60 Hz, where N is a whole number comprised between 1 and 16. These signals drive a motor step-by-step, the motor in turn driving minutes and hours hands by one step per pulse. A liquid crystal supplied with a signal of optically perceptible frequency of about 1 Hz can be added, providing a flashing optical display enabling verification of running of the watch.

REFERENCES:
patent: 3469389 (1969-09-01), Nakai
patent: 3748846 (1973-07-01), Kikuchi
patent: 3800523 (1974-04-01), Yamazaki
patent: 3802182 (1974-04-01), Fujita

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