US3794867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing device for an oscillatory crystal
Assignee: Compagnie Electronique et de Piezoelectricite CEPE
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Filing: 1972-02-09
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Granted: 1974-02-26
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Expires: 1992-02-09
Abstract
Abstract A wire suspension device for oscillatory piezoelectric crystals made of a bar vibrating in a flexion mode, said wires being fixed on two parallel faces at points of minimum vibration of the crystal , determined by the intersection with these faces of a particular inclined straight line passing through a point of the median axis of longitudinal symmetry located at a distance from one end of approximately 0.2 times the total length.
Inventors
- 👤 G Gibert
- 👤 P Vidal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:42
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504; H03H9/0533
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
A fixing device for an oscillatory crystal in parallelpiped bar form, capable of mechanical oscillations in a flexion mode and in a plane parallel to that of the faces by which said parallelpiped is fixed, said fixing faces being parallel with one another, comprising a fixed support, and suspension wires respectively attached at one of their ends to said support and at the other end of the crystal, at fixing points on said faces, said points being arranged in pairs respectively on each of said faces, and each pair of points being located on a straight line intersecting the median plane of symmetry of the bar which is parallel to said faces, said intersection point being located on the axis of symmetry of said median plane, said straight line making an acute angle up to 20* with a line passing at said intersection point and perpendicular to said faces.
Claim 2
Dependent Claim
149 words
A fixing device for an oscillatory crystal in parallelpiped bar form, capable of mechanical oscillations in a flexion mode and in a plane parallel to that of the faces by which said parallelpiped is fixed, said fixing faces being parallel with one another, comprising a fixed support, and suspension wires respectively attached at one of their ends to said support and at the other end of the crystal, at fixing points on said faces, said points being arranged in pairs respectively on each of said faces, and each pair of points being located on a straight line intersecting the median plane of symmetry of the bar which is parallel to said faces, said intersection point being located on the axis of symmetry of said median plane, said straight line making an acute angle up to 20* with a line passing at said intersection point and perpendicular to said faces.
Claim 3
Dependent Claim
41 words
A fixing device as claimed in claim 1, wherein the shorter distance of said intersection point to one of the two ends of the bar is between 0.200 and a value less than 0.224 times the largest dimension of said bar.
Claim 4
Dependent Claim
41 words
A fixing device as claimed in claim 1, wherein the plane defined by said straight line and said perpendicular direction, makes an angle with the median plane of symmetry of the bar perpendicular to said faces, of between 30* and 60*.
Claim 5
Dependent Claim
13 words
An oscillatory crystal as claimed in claim 1, equipped with said fixing device.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |