Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1978-11-30
1980-09-02
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310326, 310337, 310369, H01L 4110
Patent
active
042208874
ABSTRACT:
An electromechanical transducer is made from a member providing for the introduction of electrical energy and the conversion of such energy to mechanical vibrations radially. First means cooperate with the transducer member in limiting the vibrations of the member in a direction for radially contracting the member. When the transducer member has a narrow gap extending along the length of the transducer member, the first means includes a resilient member having a width greater than the width of the gap and disposed in the gap to prestress the transducer member and prevent the ends of the gap from contacting each other during such vibrations. Second means cooperate with the transducer member for limiting the vibrations of the member in a direction for radially expanding the member. The second means include at least one band extending circumferentially around the transducer member for limiting the mechanical vibrations of the member in a direction for expanding the member. Means are provided for introducing electrical signals to the transducer member to produce the mechanical vibrations.
REFERENCES:
patent: 2812452 (1957-11-01), Harris
patent: 3043967 (1962-07-01), Clearwaters
patent: 3230505 (1966-01-01), Parker et al.
patent: 3325780 (1967-06-01), Horan
patent: 3396285 (1968-08-01), Michenko
Budd Mark O.
Roston Ellsworth R.
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