Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1980-06-09
1982-09-21
Miller, J. D.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310335, 310369, 128660, 333186, 367157, H03J 328, H03H 940, A61B 1000
Patent
active
043509177
ABSTRACT:
An ultrasonic wave transducer is formed from a body of piezoelectric material having nonuniform thickness. Each location on the transducer is resonant at a different frequency according to the thickness at that point. By changing the frequency of the applied excitation signal, the origin and direction of the radiation can be altered.
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Lizzi Frederic L.
Weil Kurt W.
Miller J. D.
Rebsch D. L.
Riverside Research Institute
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