Patent US4451755A successfully refreshed from Google Patents.
US4451755A
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Acceleration sensitivity reduction method
Assignee: United States Department of the Army
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Filing: 1982-10-18
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Granted: 1984-05-29
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Expires: 2002-10-18
Abstract
Abstract The acceleration sensitivity of an AT-cut quartz crystal plate resonator iseduced by replacing the quartz crystal plate of the resonator with a quartz crystal plate having a flatter plate contour.
Inventors
- 👤 John R. Vig
- 👤 Raymond L. Filler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:41
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/15; H03H9/17; H03H9/19
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
44 words
Method of reducing the average acceleration sensitivity of a 10 megahertz, third-overtone AT-cut quartz crystal plate resonator from 3.5×10 -9 /g to 7×10 -10 /g comprising replacing a 2 diopter contour plano-convex quartz crystal plate with an 0.62 diopter contour plano-convex quartz crystal plate.
Claim 2
Dependent Claim
44 words
Method of reducing the average acceleration sensitivity of a 10 megahertz, third-overtone AT-cut quartz crystal plate resonator from 3.5×10 -9 /g to 7×10 -10 /g comprising replacing a 2 diopter contour plano-convex quartz crystal plate with an 0.62 diopter contour plano-convex quartz crystal plate.
Claim 3
Dependent Claim
41 words
Method of reducing the acceleration sensitivity of a 5 megahertz third-overtone AT-cut quartz crystal plate resonator from 2.4×10 -9 /g to 4.2×10 -10 /g comprising replacing a 6 diopter plano-convex quartz crystal plate with a 2 diopter biconvex quartz crystal plate.
Claim 4
Dependent Claim
41 words
Method of reducing the acceleration sensitivity of a 5 megahertz third-overtone AT-cut quartz crystal plate resonator from 2.4×10 -9 /g to 4.2×10 -10 /g comprising replacing a 6 diopter plano-convex quartz crystal plate with a 2 diopter biconvex quartz crystal plate.
Claim 5
Dependent Claim
46 words
Method of reducing the acceleration sensitivity of a 5 megahertz fundamental mode AT-cut quartz crystal plate resonator from in excess of 1×10 -8 /g to 1×10 -9 /g comprising replacing a 2.87 diopter plano convex quartz crystal plate with a 1.37 diopter plano-convex quartz crystal plate.
Claim 6
Dependent Claim
46 words
Method of reducing the acceleration sensitivity of a 5 megahertz fundamental mode AT-cut quartz crystal plate resonator from in excess of 1×10 -8 /g to 1×10 -9 /g comprising replacing a 2.87 diopter plano convex quartz crystal plate with a 1.37 diopter plano-convex quartz crystal plate.
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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |