Electronic timepiece

Details Electronic timepiece Electronic timepiece

1974-01-11

1977-08-23

Weldon, Ulysses

Electrical generator or motor structure

Dynamoelectric

Rotary

58 23AC, 58 855, 58 50R, 310346, G04C 300

Patent

active

040431096

ABSTRACT:
An electronic wristwatch having a quartz crystal vibrator serving as a time standard, a display, and an electronic divider circuit for dividing the high frequency signal supplied by the quartz crystal vibrator into a low frequency timekeepng signal and applying same to the display. A quartz crystal oscillator circuit is adapted to be compensated during changes in temperature to stabilize the operation thereof, and a divider regulating circuit is provided selectively to regulate the period of the timekeeping signal produced by the divider circuit. The regulating circuit is completely independent of the quartz crystal oscillator circuit, and regulation of the period of the timing signal has no effect on the operation of the oscillator circuit.

REFERENCES:
patent: 2471143 (1949-05-01), Cress
patent: 3289055 (1966-11-01), Aizawa et al.
patent: 3322981 (1967-05-01), Brenig
patent: 3540207 (1970-11-01), Keeler
patent: 3541779 (1970-11-01), Langley
patent: 3568093 (1971-03-01), Ishida et al.
patent: 3719838 (1973-03-01), Peduto et al.
patent: 3777471 (1973-12-01), Koehler et al.
patent: 3792377 (1974-02-01), Fujita et al.
patent: 3810355 (1974-05-01), Ito
patent: 3895486 (1975-07-01), Hammer et al.

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