Patent US3564539A successfully refreshed from Google Patents.
US3564539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital resolver
Assignee: United States Department of the Navy
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Filing: 1969-03-27
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Granted: 1971-02-16
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Expires: 1989-03-27
Abstract
Abstract A DIGITAL RESOLVER IS DISCLOSED WHICH ROTATES AN INPUT VECTOR FROM A SHAFT ANGLE TRANSMITTER IN ACCORDANCE WITH THE NUMBER IN A BINARY COUNTER TO ACHIEVE A NULL. THE ROTATION IS PERFORMED IN THREE STAGES, TWO OF WHICH PROVIDE FOR LARGE, EXACT, DISCRETE ROTATIONS AND THE THIRD FOR A LINEAR APPROXIMATION. WHEN A NULL IS ACHIEVED, THE ANGLE THROUGH WHICH THE INPUT VECTOR HAS BEEN ROTATED REPRESENTS THE ANGULAR POSITION OF THE TRANSMITTER SHAFT. THE RESOLVER MAY BE USED EITHER TO CONTROL THE ANGULAR POSITION OF THE SHAFT OR TO READ OUT THE SHAFT ANGLE OF THE TRANSMITTER AS A BINARY NUMBER.
Inventors
- 👤 Brock S Dew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:27
CPC Classifications
H; H03; H03M; H03M1/00; G; G08; G08C; G08C19/00; G08C19/38; G08C19/46; H03M1/12; H03M1/50
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |