Patent US3606687A successfully refreshed from Google Patents.
US3606687A
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Pendulous synchro level sensor
Assignee: Kearfott Guidance and Navigation Corp
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Filing: 1968-01-18
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Granted: 1971-09-21
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Expires: 1988-01-18
Abstract
Abstract A MODULE SYSTEM TO DETERMINE THE TILT OF TWO PLANES RELATIVE TO EACH OTHER AND TO THE EARTH HORIZONTAL/VERTICAL. A MODULE IS AFFIXED TO EACH PLANE, BELOW THE PLANE. EACH MODULE HAS A RESOLVER WITH A PENDULUM ATTACHED TO THE RESOLVER SHAFT. THE OUTPUT OF ONE MODULE RESOLVER IS FED TO THE OTHER MODULE RESOLVER AND THE OUTPUT OF THE SECOND MODULE RESOLVER THEN PROVIDES THE TILT ANGLE.
Inventors
- 👤 John N Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:53
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/02; G01C9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |