Title:
ADJUSTABLE PIEZOOELECTRIC CONVERTER FOR CLOCKS
Document Type and Number:
Japanese Patent JPS5648564
Kind Code:
A
Abstract:
A watch includes a piezoelectric wafer mounted on a membrane held by its peripheral edge inside a watch caseback. A frequency adjustment device mounted in the caseback includes a rotatable arm contacting the membrane and movable to adjust the resonant frequency of the membrane and piezoelectric crystal vibrating assembly. The frequency of the piezoelectric transducer may be adjusted to match a desired frequency of an electrical or sound signal.
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| JPS59684 | ELECTRONIC TIMEPIECE CIRCUIT |
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| JPS5958389 | [Title of the device] Alarm wrist watch |
Inventors:
JIYATSUKU SHIYUWARUTSUCHIRUDO
Application Number:
JP12219180A
Publication Date:
May 01, 1981
Filing Date:
September 03, 1980
Export Citation:
Assignee:
TIMEX CORP
International Classes:
G04C21/02; G04G13/02; G10K9/12; G10K9/122; H04R17/10; G10K13/00; (IPC1-7): G04C21/06; G10K9/12; H04R17/00