Patent US3373327A successfully refreshed from Google Patents.
US3373327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit for cryogenic motors
Assignee: United States Department of the Army
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Filing: 1964-09-22
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Granted: 1968-03-12
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Expires: 1984-09-22
Abstract
No abstract record available.
Inventors
- 👤 Dieter L Teuber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:09
CPC Classifications
H; H02; H02K; H02K55/00; H02K55/02; H02K55/04; H02P; H02P7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A MOTOR COMPRISING A PLURALITY OF COIL MEANS; A ROTOR MOUNTED FOR ROTATION; FIRST CIRCUIT MEANS FOR SENSING THE DIRECTION OF CHANGE IN THE INDUCTIVITY OF EACH COIL MEANS DUE TO ROTATION OF SAID ROTOR; SAID FIRST CIRCUIT MEANS HAVING A PLURALITY OF CONTROL WINDINGS, EACH WOUND AROUND AND ASSOCIATED WITH DIFFERENT PAIRS OF ADJACENT COIL MEANS; SAID CONTROL WINDINGS BEING SO ARRANGED THAT A DIFFERENCE IN INDUCTIVITY OF ANY TWO CONTROL WINDINGS ASSOCIATED WITH ONE OF SAID COIL MEANS IS PROPORTIONAL TO THE INDUCTIVITY OF SAID ONE COIL MEANS, CONTROL CIRCUIT MEANS HAVING INPUTS CONNECTED TO OUTPUTS OF SAID FIRST CIRCUIT MEANS; AND SAID CONTROL CIRCUIT MEANS HAVING OUTPUTS CONNECTED TO THE COIL MEANS SO AS TO CONTROL THE ENERGIZATION OF SAID COIL MEANS.
Claim 2
Dependent Claim
125 words
A MOTOR COMPRISING A PLURALITY OF COIL MEANS; A ROTOR MOUNTED FOR ROTATION; FIRST CIRCUIT MEANS FOR SENSING THE DIRECTION OF CHANGE IN THE INDUCTIVITY OF EACH COIL MEANS DUE TO ROTATION OF SAID ROTOR; SAID FIRST CIRCUIT MEANS HAVING A PLURALITY OF CONTROL WINDINGS, EACH WOUND AROUND AND ASSOCIATED WITH DIFFERENT PAIRS OF ADJACENT COIL MEANS; SAID CONTROL WINDINGS BEING SO ARRANGED THAT A DIFFERENCE IN INDUCTIVITY OF ANY TWO CONTROL WINDINGS ASSOCIATED WITH ONE OF SAID COIL MEANS IS PROPORTIONAL TO THE INDUCTIVITY OF SAID ONE COIL MEANS, CONTROL CIRCUIT MEANS HAVING INPUTS CONNECTED TO OUTPUTS OF SAID FIRST CIRCUIT MEANS; AND SAID CONTROL CIRCUIT MEANS HAVING OUTPUTS CONNECTED TO THE COIL MEANS SO AS TO CONTROL THE ENERGIZATION OF SAID COIL MEANS.
References Cited (Backward Citations)
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US3005117A
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US3153185A
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US3274471A
Cited
US3304481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |