US3172092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable reluctance angle transducer
Assignee: Individual
•
Filing: 1960-07-26
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Granted: 1965-03-02
•
Expires: 1980-07-26
Abstract
No abstract record available.
Inventors
- 👤 Robert L Ledford
- 👤 David S Bynum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:50
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A TRANSDUCER FOR REMOTELY INDICATING THE ANGULAR POSITION OF A HOUSING ROTATABLY MOUNTED ON A FIXED SHAFT, COMPRISING: A CYLINDRICAL BODY MADE OF MAGNETIC MATERIAL INCLUDED IN SAID HOUSING, SAID CYLINDRICAL BODY SURROUNDING SAID SHAFT AND HAVING AN INNER CYLINDRICAL SURFACE ECCENTRIC RELATIVE TO SAID SHAFT AND PARALLEL THEREWITH; A PAIR OF E-SHAPED MAGNETIC CORES ATTACHED TO SAID SHAFT AT DIAMETRICALLY OPPOSED POINTS, SAID CORES BEING LOCATED WITHIN SAID HOUSING WITH THE OPEN ENDS OF THE CORES EXTENDING EQUAL DISTANCES FROM SAID SHAFT TOWARD SAID INNER CYLINDRICAL SURFACE, THE DISTANCE EXTENDED BEING SUCH AS TO LEAVE AN AIR GAP BETWEEN THE CORES AND SAID INNER SURFACE AT ALL ANGULAR POSITIONS OF SAID HOUSING; A CONDUCTIVE WINDING ON THE CENTRAL LEG OF EACH OF SAID E-SHAPED CORES, THE INDUCTIVE COUPLING BETWEEN SAID WINDINGS BEING SUBSTANTIALLY ZERO, THE INDUCTANCE OF EACH WINDING VARY WITH CHANGES IN THE AIR GAP BETWEEN ITS RESPECTIVE CORE AND SAID ECCENTRIC INNER CYLINDRICAL SURFACE; AND MEANS REMOTE FROM SAID TRANSDUCER AND CONNECTED TO SAID WINDINGS FOR INDICTING THE ANGULAR POSITION OF SAID HOUSING.
Claim 2
Dependent Claim
176 words
A TRANSDUCER FOR REMOTELY INDICATING THE ANGULAR POSITION OF A HOUSING ROTATABLY MOUNTED ON A FIXED SHAFT, COMPRISING: A CYLINDRICAL BODY MADE OF MAGNETIC MATERIAL INCLUDED IN SAID HOUSING, SAID CYLINDRICAL BODY SURROUNDING SAID SHAFT AND HAVING AN INNER CYLINDRICAL SURFACE ECCENTRIC RELATIVE TO SAID SHAFT AND PARALLEL THEREWITH; A PAIR OF E-SHAPED MAGNETIC CORES ATTACHED TO SAID SHAFT AT DIAMETRICALLY OPPOSED POINTS, SAID CORES BEING LOCATED WITHIN SAID HOUSING WITH THE OPEN ENDS OF THE CORES EXTENDING EQUAL DISTANCES FROM SAID SHAFT TOWARD SAID INNER CYLINDRICAL SURFACE, THE DISTANCE EXTENDED BEING SUCH AS TO LEAVE AN AIR GAP BETWEEN THE CORES AND SAID INNER SURFACE AT ALL ANGULAR POSITIONS OF SAID HOUSING; A CONDUCTIVE WINDING ON THE CENTRAL LEG OF EACH OF SAID E-SHAPED CORES, THE INDUCTIVE COUPLING BETWEEN SAID WINDINGS BEING SUBSTANTIALLY ZERO, THE INDUCTANCE OF EACH WINDING VARY WITH CHANGES IN THE AIR GAP BETWEEN ITS RESPECTIVE CORE AND SAID ECCENTRIC INNER CYLINDRICAL SURFACE; AND MEANS REMOTE FROM SAID TRANSDUCER AND CONNECTED TO SAID WINDINGS FOR INDICTING THE ANGULAR POSITION OF SAID HOUSING.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |