US4935658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal resonator with low acceleration sensitivity and method of manufacture thereof
Assignee: QUARTZTRONICS Inc A UTAH CORP
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Filing: 1988-07-13
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Granted: 1990-06-19
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Expires: 2008-07-13
Abstract
Abstract In a process of producing crystal resonators in which the direction and magnitude of the gamma vector is substantially the same for each resonator, a method of altering the resonator during the process to change the resonator mass, shape, or electrode placement so as to reduce the gamma vector magnitude of each crystal. This alteration may be done by adding mass, removing mass, or both adding and removing mass, or by positioning the electrodes to selectively position the electric field in the crystal, all in order to move the location of the active region of vibration and thereby reduce the gamma vector.
Inventors
- 👤 Errol P. Eernisse
- 👤 Roger W. Ward
- 👤 O. Lew Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:04
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; H03H3/04; H03H9/00; H03H9/15; H03H9/17; H03H9/19; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A crystal resonator constructed to control acceleration sensitivity of said resonator and comprising a piezoelectric resonator plate, mounting structure for supporting the plate, means for causing said plate to resonate, and means disposed on a selected area of the plate to distribute the mass of the resonator plate in a non-symmetric fashion relative to the Y axis of the plate which is normal thereto, for reducing at least one component of the gamma vector of the plate, to thereby reduce the acceleration sensitivity
Claim 2
Dependent Claim
83 words
A crystal resonator constructed to control acceleration sensitivity of said resonator and comprising a piezoelectric resonator plate, mounting structure for supporting the plate, means for causing said plate to resonate, and means disposed on a selected area of the plate to distribute the mass of the resonator plate in a non-symmetric fashion relative to the Y axis of the plate which is normal thereto, for reducing at least one component of the gamma vector of the plate, to thereby reduce the acceleration sensitivity
Claim 3
Dependent Claim
35 words
A crystal resonator as in claim 1 wherein said means for reducing at least one component of the gamma vector of the plate comprises resonator plate material positioned on said selected area of the plate.
Claim 4
Dependent Claim
35 words
A crystal resonator as in claim 1 wherein said means for reducing at least one component of the gamma vector of the plate comprises omission of a portion of the plate at said selected area.
Claim 5
Dependent Claim
89 words
A crystal resonator constructed to control acceleration sensitivity of said resonator and comprising a piezoelectric resonator plate, mounting structure for supporting the plate, means for producing an electric field in said plate to cause said plate to resonate, and means disposed on the electric field producing means so that the distribution of the electric field in the plate is non-symmetric relative to the Y axis of the plate which normal thereto, for reducing at least one component of the gamma vector of the plate to thereby reduce acceleration sensitivity.
Claim 6
Dependent Claim
89 words
A crystal resonator constructed to control acceleration sensitivity of said resonator and comprising a piezoelectric resonator plate, mounting structure for supporting the plate, means for producing an electric field in said plate to cause said plate to resonate, and means disposed on the electric field producing means so that the distribution of the electric field in the plate is non-symmetric relative to the Y axis of the plate which normal thereto, for reducing at least one component of the gamma vector of the plate to thereby reduce acceleration sensitivity.
References Cited (Backward Citations)
DE204582C
Cited
US4262227A
Cited
US4418299A
Cited
US4211947A
Cited
DE2828048A1
Cited
US4370584A
Cited
US4451755A
Cited
JPS60160213A
Cited
US4642505A
Cited
US4641055A
Cited
US4837475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |