US3751692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature insensitive piezoelectric resonator mounting
Assignee: Centre Electronique Horloger SA
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Filing: 1971-11-04
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Granted: 1973-08-07
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Expires: 1991-11-04
Abstract
Abstract A bar of x-y oscillating quartz is suspended in a casing under vacuum by two pairs of suspension wires fixed on opposite faces of the bar, centrally facing ends of each pair of wires being fixed to a respective bar section each secured to a single respective support filament passing through a central insulating part of the casing base. Final adjustment of the frequency is effected by the deposit of material onto the ends of the quartz bar after mounting same, but prior to encapsulation and evacuation.
Inventors
- 👤 H Choffat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:48
CPC Classifications
G; G04; G04F; G04F5/00; G04F5/04; G04F5/06; G04F5/063; H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/09
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
A piezoelectric resonator comprising a casing having a base member; an elongated bar of piezoelectric material suspended in said casing and extending parallel to said base member, said resonator being under vacuum to oscillate in the x-y mode; a first pair of suspension wires fixed on one longitudinal face of said bar, and a second pair of suspension wires symmetrically fixed on an opposite longitudinal face of said bar, said first and second pairs of wires each being connected to the same point on a single respective support filament passing through the base of said casing; said support filaments preventing generation of longitudinal stresses in said bar despite variations in the length of said casing.
Claim 2
Dependent Claim
115 words
A piezoelectric resonator comprising a casing having a base member; an elongated bar of piezoelectric material suspended in said casing and extending parallel to said base member, said resonator being under vacuum to oscillate in the x-y mode; a first pair of suspension wires fixed on one longitudinal face of said bar, and a second pair of suspension wires symmetrically fixed on an opposite longitudinal face of said bar, said first and second pairs of wires each being connected to the same point on a single respective support filament passing through the base of said casing; said support filaments preventing generation of longitudinal stresses in said bar despite variations in the length of said casing.
Claim 3
Dependent Claim
25 words
A resonator according to claim 1, in which the two support filaments pass through a common electrically insulating support member located centrally in said base.
Claim 4
Dependent Claim
27 words
A resonator according to claim 1, in which each of said pairs of suspension wires are connected by a bar section secured to the respective support filament.
Claim 5
Dependent Claim
26 words
A resonator according to claim 1, in which said support filaments are formed by two pins of a transistor base plate centrally fixed in said base.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |