Piezoelectric vibrator and method of adjusting vibrating frequen

Details Piezoelectric vibrator and method of adjusting vibrating frequen Piezoelectric vibrator and method of adjusting vibrating frequen

1985-11-14

1987-04-14

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310312, H01L 4108

Patent

active

046581731

ABSTRACT:
The disclosure is directed to a piezoelectric vibrator or resonator which includes a vibrating plate employing expansion mode vibration, and a groove or grooves formed at a center and/or in the vicinity of the center of the vibrating plate in a direction intersecting sides of the vibrating plate contributing to the vibration so as to make vibration propagating speed slower than that in the absence of the groove or grooves, and also to a method of adjusting vibrating frequency of such a piezoelectric vibrator.

REFERENCES:
patent: 2870521 (1959-01-01), Rudnick
patent: 4469975 (1984-09-01), Nakamura et al.
patent: 4511821 (1985-04-01), Nakamura et al.
patent: 4532451 (1985-07-01), Inoue

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