Patent US2218112A successfully refreshed from Google Patents.
Patent US3186237A successfully refreshed from Google Patents.
US3186237A
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Piezoelectric transducer
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1961-10-17
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Granted: 1965-06-01
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Expires: 1981-10-17
Abstract
No abstract record available.
Inventors
- 👤 Forrest Lew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:36
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/09; G01P15/0922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN AN ACCELEROMETER, AN ELONGATED PIEZOELECTRIC CRYSTAL HAVING A BORE EXTENDING ALONG ITS LONGITUDINAL AXIS, CANTILEVER TYPE MOUNTING MEANS FOR SUPPORTING THE CRYSTAL AT ONE OF ITS ENDS, A MASS SECURED TO THE OTHER CRYSTAL END, A WIRE EXTENDING THROUGH THE BORE AND HAVING ONE END SECURED TO THE MASS WITH THE OTHER END BEING SECURED TO THE SUPPORT, AND MEANS FOR EXERTING A PULLING ACTION ON THE WIRE FOR APPLYING A COMPRESSIVE FORCE TO THE CRYSTAL IN THE DIRECTION OF ITS LONGITUDINAL AXIS.
Claim 2
Dependent Claim
84 words
IN AN ACCELEROMETER, AN ELONGATED PIEZOELECTRIC CRYSTAL HAVING A BORE EXTENDING ALONG ITS LONGITUDINAL AXIS, CANTILEVER TYPE MOUNTING MEANS FOR SUPPORTING THE CRYSTAL AT ONE OF ITS ENDS, A MASS SECURED TO THE OTHER CRYSTAL END, A WIRE EXTENDING THROUGH THE BORE AND HAVING ONE END SECURED TO THE MASS WITH THE OTHER END BEING SECURED TO THE SUPPORT, AND MEANS FOR EXERTING A PULLING ACTION ON THE WIRE FOR APPLYING A COMPRESSIVE FORCE TO THE CRYSTAL IN THE DIRECTION OF ITS LONGITUDINAL AXIS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |