Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1986-06-09
1987-12-29
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310312, 310365, 310369, H01L 4108
Patent
active
047163321
ABSTRACT:
A piezoelectric vibrator of thickness-shear mode including a vibrating plate made of AT-cut quartz and a pair of electrodes applied on major surfaces of the vibrating plate in opposition to each other. A part of a contour of the vibrating plate is made closer to the electrode by cutting off a corner of a square vibrating plate. An impedance of the piezoelectric vibrator for a fundamental vibration is extremely increased to suppress the fundamental vibration and thus the piezoelectric vibrator can vibrate stably at a third overtone frequency.
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Asahi Dempa Co., Ltd.
Budd Mark O.
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