Hour hand corrector for dual display timepiece

Details Hour hand corrector for dual display timepiece Hour hand corrector for dual display timepiece

1978-10-11

1980-10-21

Jackmon, Edith S.

Horology: time measuring systems or devices

Regulating means

For setting

368 76, 368187, G04C 300, G04B 2700

Patent

active

042286484

ABSTRACT:
A dual display timepiece employs a stepping motor capable of rotation in sense for driving hour and minute hands in an analogue display and an electronic digital display for displaying other information (second, date, chronograph, etc.). In order to facilitate hour hand corrections a logic circuit is provided which permits the user to enter the nature (positive or negative) and the amount of correction desired into the digital display. Following such entry the hour hand is corrected automatically by application of N.times.Y higher than normal frequency signals to the analogue display, where N corresponds to the number of signals required to effect a one hour or half hour correction and Y corresponds to the correction entered by the user.

REFERENCES:
patent: 3823545 (1974-07-01), Vittoz et al.
patent: 3875741 (1975-04-01), Hastings
patent: 3911665 (1975-10-01), Van Berkum
patent: 4004407 (1977-01-01), Fujita
patent: 4095405 (1978-06-01), Tamaka
patent: 4170870 (1979-10-01), Burdet

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