Compensating circuitry for an electronic watch

Details Compensating circuitry for an electronic watch Compensating circuitry for an electronic watch

1989-05-04

1990-03-27

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With mechanical or electromechanical driven display

368160, G04B 1904, G04F 500

Patent

active

049126890

ABSTRACT:
A timepiece includes a hairspring for storing the energy provided by a step motor driving circuit and a rotor immersed in a viscous fluid controls the energy released by the hairspring to provide a constant driving force for turning the display hands of the timepiece. Compensating circuitry varies the strength of a driving signal supplied to the step motor to minimize the adverse influence of variations in the load torque due to changes in ambient temperature and/or additional loads associated with a calendar mechanism.

REFERENCES:
patent: 3952497 (1976-04-01), Schulz et al.
patent: 3978654 (1976-09-01), Kolke et al.

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