Apparatus for correcting second hand of electronic timepiece

Details Apparatus for correcting second hand of electronic timepiece Apparatus for correcting second hand of electronic timepiece

1975-11-13

1978-05-02

Weldon, Ulysses

58 23R, 58 50R, G04B 2708

Patent

active

040867552

ABSTRACT:
An electronic timepiece comprises an oscillator which generates high frequency pulses, a dividing circuit connected to receive the high frequency pulses from the oscillator and divide them into lower frequency pulses suitable for use as a time standard, and a time indicator responsive to the lower frequency pulses for indicating the time in at least minutes and seconds. An apparatus for correcting the seconds indication of the time indicator comprises a delaying circuit connected to receive lower frequency pulses from the dividing circuit and delay them a predetermined time period, and a selecting circuit connected to receive both the lower frequency pulses and the delayed pulses and selectively pass them to the time indicator in response to control signals. An advance-set circuit is connected to an advancing switch and responds to each switch actuation to transmit an advance control signal to the selecting circuit which then adds a lower frequency pulse to a delayed pulse to thereby advance the seconds indication, and a retard-set circuit is connected to a retarding switch and responds to each switch actuation to transmit a retard control signal to the selecting circuit which then inhibits the passing of a lower frequency pulse to thereby retard the seconds indication. An up-down counter coacts with an advance-reset circuit and a retard-reset circuit for counting the number of actuations of the advancing and retarding switches and effecting resetting of corresponding ones of the advance-set and retard-set circuits.

REFERENCES:
patent: 3668859 (1972-06-01), Polin et al.
patent: 3823545 (1974-07-01), Vittoz et al.
patent: 3834152 (1974-09-01), Nishimura et al.
patent: 3895486 (1975-07-01), Hammer et al.
patent: 3931703 (1976-01-01), Scherrer et al.
patent: 3948035 (1976-04-01), Kusumoto

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