Ultrasonic motor for driving an analog electronic watch

Details Ultrasonic motor for driving an analog electronic watch Ultrasonic motor for driving an analog electronic watch

1990-10-22

1995-12-26

Roskoski, Bernard

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

368160, 368204, G04F 500

Patent

active

054793807

ABSTRACT:
An electronic timepiece utilizing a motor to drive indicating hands is provided. The motor includes a first member having displaceable portions displaceable in a first direction. A second member moveable in a second direction is moved in the second direction by selectively coming in contact with the first member.

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Ijima, "Ultrasonic Motor Using Flexural Standing Wave", Japanese Journal of Applied Physics, Supplements, vol. 26, No. 26-1, 1987.

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