Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1977-08-18
1979-05-22
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
29 2535, 179110A, 310324, H01R 4110
Patent
active
041561562
ABSTRACT:
The resonant frequency of a conventional piezoelectric transducer having predetermined dimensions and a fundamental nodal diameter is reduced while maintaining the overall predetermined diameter and fundamental nodal diameter of the transducer. A method of reducing the resonant frequency of a conventional piezoelectric transducer includes the step of radially slotting the substrate of the transducer.
REFERENCES:
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patent: 1990409 (1935-02-01), Lawrance
patent: 1997790 (1935-04-01), Heidrich
patent: 2487962 (1949-11-01), Arndt, Jr.
patent: 2870521 (1959-01-01), Rudnick
patent: 3815129 (1974-06-01), Sweany
patent: 3943338 (1976-03-01), Massa
Shoot Lyle E.
Sweany Louis P.
Budd Mark O.
P. R. Mallory & Co. Inc.
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