Time setting device for an electronic watch

Details Time setting device for an electronic watch Time setting device for an electronic watch

1974-08-09

1976-11-02

Weldon, Ulysses

58 855, G04C 300

Patent

active

039888860

ABSTRACT:
An electronic watch having a time-counting circuit comprising a plurality of cascade-connected counter stages where the counts are continuously carried in each predetermined lapse of time under control of output clock pulses from a clock pulse oscillator generating standard high frequency clock pulses with high accuracy, the counter stages being coupled with a time display device indicating momentarily changing time. The watch is provided with a time-setting device comprising an auxiliary counter circuit for designating independently the respective counter stages constituting the time-counting circuit, a normally open switch closed only when a time-setting operation is required and sequentially designating through the auxiliary counter circuit the respective counter stages from the highest stage to the lowest stage whose count is desired to be correct, and a counter for continuously and automatically adding one time-correction pulse after another having a predetermined frequency to one of the counter stages which is designated by the auxiliary counter circuit upon the actuation of the switch until the designated counter stage is stored with a desired number of counts, thereby attaining a time-setting operation as easily and speedily as possible.

REFERENCES:
patent: 3788058 (1974-01-01), Idei et al.
patent: 3798428 (1974-03-01), Izawa
patent: 3810356 (1974-05-01), Fujita
patent: 3852950 (1974-12-01), Yoda et al.
patent: 3852952 (1974-12-01), Vittoz et al.

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