Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1979-03-12
1980-12-16
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
73632, 128660, 310327, 310334, 310336, H01L 4108
Patent
active
042400031
ABSTRACT:
Spurious emissions caused by a newly-described vibration mode in an acosutic imaging transducer are suppressed by cancelling the net displacement of the center of mass of each piezoelectric element in the transducer array.
REFERENCES:
patent: 3036231 (1962-05-01), Henry
patent: 3058015 (1962-10-01), Nesh
patent: 3365590 (1968-01-01), Lobdell
patent: 3543058 (1970-11-01), Klemens
patent: 3714475 (1973-01-01), Baker, Jr.
patent: 4101795 (1978-07-01), Fukomoto et al.
patent: 4122725 (1978-10-01), Thompson
patent: 4158787 (1979-06-01), Forward
Budd Mark O.
Hewlett--Packard Company
Wong Edward Y.
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