Patent US3787743A successfully refreshed from Google Patents.
US3787743A
Expired / Lapsed
US
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Flexion mode crystalline bar for an oscillator
Assignee: Compagnie Electronique et de Piezoelectricite CEPE
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Filing: 1972-02-09
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Granted: 1974-01-22
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Expires: 1992-02-09
Abstract
Abstract Crystalline parallelepiped bar oscillating piezoelectrically in a plane, in a flexion mode, whose terminal faces, are inclined by respect to the plane perpendicular to the longitudinal axis of symmetry of the bar, at an angle ranging between 0* and 60* measured in the flexion plane, and at an angle ranging between 0* and 45* measured in the plane perpendicular to the flexion plane.
Inventors
- 👤 G Gibert
- 👤 P Vidal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:23
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504; H03H9/0533
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A crystalline bar of parallelepiped form, capable of piezoelectric oscillations in a plane, in a flexion mode, comprising two pairs of faces parallel to its longitudinal axis of symmetry, the first pair being perpendicular to said plane, and the second parallel thereto, and one pair of terminal faces limited by external straight contour lines, said second pair including the fixing points for attaching at zones of minimum flexion vibration one of the ends of bar suspension wires respectively attached by their other end to a support, each of said pairs being equipped with a pair of plane electrodes, each pair of electrodes being respectively connected to one of the two terminals of an alternative voltage source, wherein those of said straight contour lines contained in the first pair of faces make an angle of between 0* and 45* with a direction perpendicular to said second pair of faces, counted in a clockwise direction.
Claim 2
Dependent Claim
153 words
A crystalline bar of parallelepiped form, capable of piezoelectric oscillations in a plane, in a flexion mode, comprising two pairs of faces parallel to its longitudinal axis of symmetry, the first pair being perpendicular to said plane, and the second parallel thereto, and one pair of terminal faces limited by external straight contour lines, said second pair including the fixing points for attaching at zones of minimum flexion vibration one of the ends of bar suspension wires respectively attached by their other end to a support, each of said pairs being equipped with a pair of plane electrodes, each pair of electrodes being respectively connected to one of the two terminals of an alternative voltage source, wherein those of said straight contour lines contained in the first pair of faces make an angle of between 0* and 45* with a direction perpendicular to said second pair of faces, counted in a clockwise direction.
Claim 3
Dependent Claim
45 words
A crystalline bar as claimed in claim 1, wherein those of said straight contour lines contained in the second pair of faces make an angle ranging between 0* and 60*, with a direction perpendicular to said first pair of faces counted in a clockwise direction.
Claim 4
Dependent Claim
12 words
A crystal oscillator comprising a crystalline bar as claimed in claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |