Ceramic bistable deflection element

Details Ceramic bistable deflection element Ceramic bistable deflection element

1983-10-24

1985-08-06

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310331, 310358, 310359, H01L 4108

Patent

active

045338493

ABSTRACT:
A bistable ceramic deflection element includes an assembly of two ceramic plates of a ferroelectric ceramic material which can be easily polarized and which has a low coercive field strength, one plate thereof being polarized so that the deflection element is deflected. The other plate is not polarized. The depolarization of the polarized plate can be performed simultaneously with the polarization of the plate non-polarized thus far, because the interchanging of the polarization condition can be simply performed by briefly applying a direct voltage via two extreme electrodes, provided on the plates. The direct voltage causes polarization of the plate not polarized thus far.

REFERENCES:
patent: 2782397 (1957-02-01), Young
patent: 3646413 (1972-02-01), Oomen
patent: 3950659 (1976-04-01), Dixon et al.
patent: 4349762 (1982-09-01), Kitamura et al.
Flexure Mode Piezoelectric Transducers, by C. P. Germano, IEEE Transactions on Audio and Electroacoustics, vol. AU-19, No. 1, Mar. 1971, pp. 6-12.

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