Acoustic electric transducer with shield of controlled thickness

Details Acoustic electric transducer with shield of controlled thickness Acoustic electric transducer with shield of controlled thickness

1979-10-11

1981-07-07

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310336, 128660, 73632, H01L 4108

Patent

active

042777119

ABSTRACT:
The rate of decay of oscillations caused by application of driving pulses to the spaced crystals of an acoustic electric transducer that are mounted on a base is increased by making the thickness of the shield in contact with the ends of the crystals remote from the base such that asymmetrical Lamb waves flowing along the shield that can induce crystal oscillations in the thickness mode have a wavelength equal to twice the spacing between crystals so that their integrated effect is nearly zero.

REFERENCES:
patent: 4101795 (1978-07-01), Fukumoto et al.
patent: 4211948 (1980-07-01), Smith et al.
patent: 4217516 (1980-08-01), Iinuma et al.
patent: 4217684 (1980-08-01), Brisken et al.

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