US3096467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless d. c. motor with permanent magnet rotor
Assignee: Ferranti International PLC
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Filing: 1960-10-07
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Granted: 1963-07-02
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Expires: 1980-10-07
Abstract
No abstract record available.
Inventors
- 👤 Angus Ernest Thomas
- 👤 Walker Donald Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
H; H02; H02P; H02P6/00; H02K; H02K29/00; H02K29/06; H02K29/10; H02P6/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A DIRECT CURRENT MOTOR COMPRISING A PERMANENTLY MAGNETISED ROTOR RIGIDLY SECURED TO AN OUTPUT SHAFT, A WOUND STATOR HAVING A PLURALITY OF WINDINGS, EACH WINDING BEING ASSOCIATED WITH AN INDIVIDUAL ENERGISING CIRCUIT WHICH IS CONTROLLED BY THE OUTPUT CURRENT FROM ONE OR OTHER OF TWO ENERGY TRANSDUCERS, GATING MEANS FOR SELECTING ONE OR OTHER OF SAID TWO TRANSDUCER FOR CONTROLLING THE ENERGISING CIRCUIT OF EACH WINDING, AND A DISC ROTATED IN SYNCHRONISM WITH SAID ROTOR BY SAID OUTPUT SHAFT, SAID DISC CONTROLLING A SUPPLY OF ENERGY TO EACH OF SAID ENERGY TRANSDUCERS WHICH ARE DISPOSED IN RELATION TO SAID DISC IN SUCH MANNER THAT FOR ANY POSITION OF SAID ROTOR AT LEAST ONE OF SAID STATOR WINDINGS IS ENERGISED TO PRODUCE A FIELD CAUSING SAID ROTOR TO ROTATE, AND THAT SAID ROTOR IS CAUSED TO ROTATE IN A FORWARD OR A REVERSE DIRECTION ACCORDING TO WHICH OF SAID TWO ENERGY TRANSDUCER IS SELECTED BY SAID GATING MEANS TO CONTROL THE ENERGISING CIRCUIT OF EACH WINDING.
Claim 2
Dependent Claim
165 words
A DIRECT CURRENT MOTOR COMPRISING A PERMANENTLY MAGNETISED ROTOR RIGIDLY SECURED TO AN OUTPUT SHAFT, A WOUND STATOR HAVING A PLURALITY OF WINDINGS, EACH WINDING BEING ASSOCIATED WITH AN INDIVIDUAL ENERGISING CIRCUIT WHICH IS CONTROLLED BY THE OUTPUT CURRENT FROM ONE OR OTHER OF TWO ENERGY TRANSDUCERS, GATING MEANS FOR SELECTING ONE OR OTHER OF SAID TWO TRANSDUCER FOR CONTROLLING THE ENERGISING CIRCUIT OF EACH WINDING, AND A DISC ROTATED IN SYNCHRONISM WITH SAID ROTOR BY SAID OUTPUT SHAFT, SAID DISC CONTROLLING A SUPPLY OF ENERGY TO EACH OF SAID ENERGY TRANSDUCERS WHICH ARE DISPOSED IN RELATION TO SAID DISC IN SUCH MANNER THAT FOR ANY POSITION OF SAID ROTOR AT LEAST ONE OF SAID STATOR WINDINGS IS ENERGISED TO PRODUCE A FIELD CAUSING SAID ROTOR TO ROTATE, AND THAT SAID ROTOR IS CAUSED TO ROTATE IN A FORWARD OR A REVERSE DIRECTION ACCORDING TO WHICH OF SAID TWO ENERGY TRANSDUCER IS SELECTED BY SAID GATING MEANS TO CONTROL THE ENERGISING CIRCUIT OF EACH WINDING.
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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |