Patent US3156907A successfully refreshed from Google Patents.
US3156907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft position transducer
Assignee: Unisys Corp
•
Filing: 1959-12-14
•
Granted: 1964-11-10
•
Expires: 1979-12-14
Abstract
No abstract record available.
Inventors
- 👤 Walter C Lanning
- 👤 Robert E Spero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:26
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/38; G08C19/46; G08C19/48; H; H03; H03M; H03M1/00; H03M1/12; H03M1/64; H03M1/645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN COMBINATION, A ROTATABLE SHAFT, MEANS COUPLED TO SAID SHAFT FOR GENERATING AN ALTERNATING MAGNETIC FIELD HAVING A DIRECTION VECTOR CORRESPONDING TO THE ANGULAR POSITION OF SAID ROTATABLE SHAFT, A WINDING DISPOSED WITHIN SAID FIELD, MEANS FOR ROTATING SAID WINDING AT UNIFORM ROTATIONAL SPEED ABOUT AN AXIS PERPENDICULAR TO SAID VECTOR, WHEREBY THERE IS INDUCED IN SAID WINDING A VOLTAGE AMPLITUDE MODULATED BY A SIGNAL HAVING A FREQUENCY RELATED TO THE SPEED OF ROTATION OF SAID WINDING AND A PHASE DETERMINED BY THE ANGULAR POSITION OF SAID ROTATABLE SHAFT, MEANS COUPLED TO SAID MEANS FOR ROTATING AND DRIVEN SYNCHRONOUSLY WITH SAID WINDING FOR GENERATING A REFERENCE VOLTAGE OF THE SAME FREQUENCY AS THAT OF SAID SIGNAL, SAID REFERENCE VOLTAGE HAVING A PHASE REPRESENTING A PREDETERMINED POSITION OF SAID SHAFT, AND MEANS COUPLED TO THE LAST-NAMED MEANS AND TO SAID WINDING FOR MEASURING THE PHASE DIFFERENCE BETWEEN SAID SIGNAL AND SAID REFERENCE VOLTAGE, WHEREBY SAID PHASE DIFFERENCE REPRESENTS THE ANGULAR DISPLACEMENT OF SAID SHAFT FROM SAID PREDETERMINED POSITION.
Claim 2
Dependent Claim
167 words
IN COMBINATION, A ROTATABLE SHAFT, MEANS COUPLED TO SAID SHAFT FOR GENERATING AN ALTERNATING MAGNETIC FIELD HAVING A DIRECTION VECTOR CORRESPONDING TO THE ANGULAR POSITION OF SAID ROTATABLE SHAFT, A WINDING DISPOSED WITHIN SAID FIELD, MEANS FOR ROTATING SAID WINDING AT UNIFORM ROTATIONAL SPEED ABOUT AN AXIS PERPENDICULAR TO SAID VECTOR, WHEREBY THERE IS INDUCED IN SAID WINDING A VOLTAGE AMPLITUDE MODULATED BY A SIGNAL HAVING A FREQUENCY RELATED TO THE SPEED OF ROTATION OF SAID WINDING AND A PHASE DETERMINED BY THE ANGULAR POSITION OF SAID ROTATABLE SHAFT, MEANS COUPLED TO SAID MEANS FOR ROTATING AND DRIVEN SYNCHRONOUSLY WITH SAID WINDING FOR GENERATING A REFERENCE VOLTAGE OF THE SAME FREQUENCY AS THAT OF SAID SIGNAL, SAID REFERENCE VOLTAGE HAVING A PHASE REPRESENTING A PREDETERMINED POSITION OF SAID SHAFT, AND MEANS COUPLED TO THE LAST-NAMED MEANS AND TO SAID WINDING FOR MEASURING THE PHASE DIFFERENCE BETWEEN SAID SIGNAL AND SAID REFERENCE VOLTAGE, WHEREBY SAID PHASE DIFFERENCE REPRESENTS THE ANGULAR DISPLACEMENT OF SAID SHAFT FROM SAID PREDETERMINED POSITION.
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |