Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1987-11-27
1989-04-25
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310344, 310348, H01L 4108
Patent
active
048251178
ABSTRACT:
An apparatus for monitoring the curing of a fiber reinforced composite plastic which is cured at temperatures of the order of 350.degree. C. and an ultrasonic transducer assembly useful in the apparatus. The transducer assembly comprises a lithium niobate piezoelectric element having anisotropic coefficients of thermal expansion which is mounted on a metal base of the transducer assembly by means of a layer of structured copper. The structured copper is thermo-compression diffusion bonded to the lithium niobate element and to the metal base, and is compliant in a transverse direction to compensate for differential thermal expansions while affording good electrical and thermal conductivity and good acoustic coupling between the lithium niobate element and metal base.
REFERENCES:
patent: 2310612 (1943-02-01), Bremer et al.
patent: 3187207 (1965-06-01), Tomes
patent: 3441754 (1969-04-01), Heny
patent: 3673442 (1972-06-01), Sonderegger
patent: 3735166 (1973-05-01), Bradley
patent: 4156158 (1979-05-01), Wilson et al.
patent: 4229812 (1980-10-01), Holloway
patent: 4252263 (1981-02-01), Houston
patent: 4266157 (1981-05-01), Peters
patent: 4366713 (1983-01-01), Gilmore et al.
patent: 4392153 (1983-07-01), Glascock, II et al.
patent: 4398117 (1983-08-01), St. Cyr
patent: 4430596 (1984-02-01), Shanley
patent: 4444352 (1984-04-01), Glascock, II et al.
patent: 4551647 (1985-11-01), Day
Conradi, M. S. and Miller, J. G., "A Transmission Oscillator Ultrasonic Spectrometer", Rev. Sci. Instrum., 45, Mar. 1974, pp. 358-360.
Mallet, L. F., "Microcomputer-Based Control of Composite Curing", M. S. Thesis, MIT, Jun. 1985, pp. 2, 25-45, 150, 151.
Gilmore Robert S.
Glascock, II Homer H.
Thomas, III Lewis J.
Budd Mark O.
Campbell Donald R.
Davis Jr. James C.
General Electric Company
Webb II Paul R.
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