Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1991-03-08
1993-03-23
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310366, 310367, H01L 4108
Patent
active
051967588
ABSTRACT:
A piezoelectric resonator containing two rectangular parallelepipedal slices including N and M base structures, respectively, wherein N and M are integers. The two rectangular parallelepipedal slices each include at least one base structure shaped as a thin crystal slice of piezoelectric material in the form of a rectangular parallelepiped. A non-resonant arm connects the two rectangular parallelepipedal slices in juxtaposition in a single plane. An embedding zone is connected to the arm through a connection zone so as to fix the resonator outside a center thereof. Electrodes are disposed on opposite surfaces of the two rectangular parallelepipedal slices and are polarized to excite preferentially the Nth harmonic of a fundamental contour vibration mode in each base structure, and to produce respective extension modes in the two rectangular parallelepipedal slices in a direction perpendicular to an axis of the non-resonant arm.
REFERENCES:
patent: 4450378 (1984-05-01), Hermann et al.
patent: 4469979 (1984-09-01), Chuang
patent: 4654663 (1987-03-01), Alsenz et al.
patent: 4873465 (1989-10-01), Bourgeois
patent: 4926086 (1990-05-01), Bourgeois et al.
Proceedings of the 39th Annual Frequency Symposium 1985, Philadelphia, Pa., IEEE Catalog No. 85CH2186-5, Library of Congress No. 58-60781, May 29-31, 1985, "A Novel Miniuature ZT-Cut Resonator", J. W. Herman, pp. 375-380.
Patent Abstracts of Japan, vol. 6, No. 32 (E-96)(910), Feb. 28, 1982, 56-152313.
Budd Mark O.
Centre Suisse d'Electronique et de Microtechnique S.A.
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