Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2007-07-24
2007-07-24
Dougherty, Thomas M. (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S340000, C310S348000
Reexamination Certificate
active
11304475
ABSTRACT:
The invention relates to piezoelectric resonators. An interposer element is used between a resonating plate and the resonator package to provide improved (i.e. reduced) acceleration sensitivity. The interposer element is preferably of similar thermal expansion characteristics to the resonating plate. Electrical connection to the resonating plate from the exterior of the package is preferably provided via the interposer element.
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Clayton, L. D. et al., “Four-Point SC-Cut Crystal Unit Design Calculations for Reduced Acceleration Sensitivity”Proceedings of the 1992 IEEE Frequency Control Symposium, May 27-29, 1992, pp. 582-596.
Zhou, Y. S. et al., “An Analysis of the Normal Acceleration Sensitivity of Contoured Quartz Resonators Stiffened by Identical Top and Bottom Quartz Cover Plates Supported by Clips,”Proceedings of the 1991 IEEE Forty-Fifth Annual Symposium on Frequency Control, May 29-31, 1991, pp. 298-308.
Boyko Olexandre A.
Brownie Phil
McIlroy Michael
Robinson Brent J.
Dougherty Thomas M.
Rakon Limited
Woodcock & Washburn LLP
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