Analog display electronic timepiece with multi-speed hand moveme

Details Analog display electronic timepiece with multi-speed hand moveme Analog display electronic timepiece with multi-speed hand moveme

1983-07-05

1985-07-02

Roskoski, Bernard

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

368 80, 368160, G04F 500

Patent

active

045264759

ABSTRACT:
An electronic analog display timepiece provides multifunctions wherein the hand, or hands, is driven at different frequencies. To prevent erroneous performance of the step motor, an interval longer than the period of damped oscillation of the step motor is provided when the step motor driving frequency changes by synchronizing the lower frequency driving signals with the signal of the highest frequency of the circuit. Alternatively, one pulse of the second frequency signal is eliminated when switching from the first to the second frequency signal.

REFERENCES:
patent: 4290129 (1981-09-01), Ushikoshi
patent: 4407019 (1983-09-01), Futami et al.

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