Electro-mechanical watch

Details Electro-mechanical watch Electro-mechanical watch

1978-02-15

1980-04-08

Jackmon, Edith S.

Horology: time measuring systems or devices

Regulating means

For setting

368 34, 368321, G04C 300, G04B 1924, G04B 2700

Patent

active

041965787

ABSTRACT:
An electro-mechanical watch for advancing the uncorrected watch indicating members to their correct time indicating positions, after a correction period during which one of the indicating members is adjusted and the advancement of the uncorrected members is interrupted. In regular operation, a pulsed signal at a normal frequency from a watch frequency divider drives a stepping motor to advance the indicating members. At the beginning of the correction period, the pulsed signal is switched from the stepping motor to a pulse counter which counts the pulses occurring during the correction period. After the correction period, the pulsed signal is switched back to the stepping motor and a number of signal pulses at a higher than normal frequency, equal to the count of the pulse counter are applied to the stepping motor to advance rapidly the uncorrected indicating members to their correct time indicating positions.

REFERENCES:
patent: 3901022 (1975-08-01), Cleusix et al.
patent: 3998044 (1976-12-01), Yamauchi et al.

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