Electronic timepiece with calendar function and control...

Details Electronic timepiece with calendar function and control... Electronic timepiece with calendar function and control...

2005-02-22

2009-11-10

Miska, Vit W (Department: 2833)

Horology: time measuring systems or devices

With calendar indicator

Movable ring or disk

C368S028000

Reexamination Certificate

active

07616527

ABSTRACT:
An electronic timepiece with a calendar display function that drives a piezo-electric actuator to drive a rotation of a piezo-electric rotor, and stops the drive of the piezo-electric actuator when the amount of the piezo-electric rotor advances is detected by a spring switch. Photoreflectors are used for day detection accomplished using gears having a small speed reduction ratio relative to the piezo-electric rotor, and spring switches are used in month detection and year detection.

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