Multi-function analog electronic timepiece

Details Multi-function analog electronic timepiece Multi-function analog electronic timepiece

1993-03-23

1993-12-28

Miska, Vit W.

Horology: time measuring systems or devices

With calendar indicator

368 80, 368157, G04B 1904, G04B 1924, G04F 500

Patent

active

052746143

ABSTRACT:
A high reliable multi-function analog electronic timepiece which has plurality of ultrasonic motors, or has an ultrasonic motor and a motor.
A first ultrasonic motor is provided as a driving source for driving a time indicating mechanism. The control circuit controls supplying timing of driving pulses of the first ultrasonic motor for driving a time indicating mechanism and driving pulses of the second ultrasonic motor for driving the calendar indicating mechanism. The control circuit inputs a driving pulse command signal to a piezoelectric vibrator driving circuit for providing driving pulses whose generating timing is controlled to the first ultrasonic motor.
The calendar indicating mechanism and the time indicating mechanism are operated by the operation of the second ultrasonic motor and the first ultrasonic motor.

REFERENCES:
patent: 4525075 (1985-06-01), Kita
patent: 5023853 (1991-06-01), Kawata et al.
patent: 5043956 (1991-08-01), Tsukada et al.
patent: 5197045 (1993-03-01), Miyazawa

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