US3356920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic apparatus including semiconductor switching means for simultaneously energizing a plurality of stator windings
Assignee: Texas Instruments Inc
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Filing: 1965-01-13
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Granted: 1967-12-05
•
Expires: 1985-01-13
Abstract
No abstract record available.
Inventors
- 👤 Charles T Button
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:22
CPC Classifications
H; H02; H02K; H02K29/00; D; D06; D06F; D06F34/00; D06F34/10; D06F37/00; D06F37/30; D06F37/304; D06F2105/00; D06F2105/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
ELECTROMAGNETIC APPARATUS COMPRISING: A STATOR INCLUDING A MULTIPLICITY OF WINDINGS, SAID WINDINGS BEING DISTRIBUTED AROUND SAID STATOR, ONE FROM THE OTHERS; A MULTIPLICITY OF SEMICONDUCTOR CURRENT SWITCHING DEVICES RESPECTIVELY INTERCONNECTED WITH SAID WINDINGS FOR CONTROLLING CURRENT FLOW THERETHROUGH; A ROTOR MOUNTED FOR ROTATION CONCENTRICALLY RELATIVE TO THE STATOR; PILOT TRIGGERING MEANS FOR SEQUENTIALLY ENERGIZING SAID SWITCHING DEVICES INDEPENDENTLY OF THE SPEED OF ROTATION OF SAID ROTOR; AND MEANS RESPONSIVE TO THE ENERGIZATION OF EACH SWITCHING DEVICE FOR DEENERGIZING A PREVIOUSLY ENERGIZED SWITCHING DEVICE SEPARATED FROM THE SWITCHING DEVICE BEING ENERGIZED BY MORE THAN ONE DEVICE IN THE SEQUENCE OF ENERGIZATION WHEREBY A PLURALITY OF STATOR WINDINGS ARE ENERGIZED SIMULTANEOUSLY AND A ROTATING MAGNETIC FIELD IS PRODUCED BY SAID STATOR FOR APPLYING TORQUE TO SAID ROTOR.
Claim 2
Dependent Claim
125 words
ELECTROMAGNETIC APPARATUS COMPRISING: A STATOR INCLUDING A MULTIPLICITY OF WINDINGS, SAID WINDINGS BEING DISTRIBUTED AROUND SAID STATOR, ONE FROM THE OTHERS; A MULTIPLICITY OF SEMICONDUCTOR CURRENT SWITCHING DEVICES RESPECTIVELY INTERCONNECTED WITH SAID WINDINGS FOR CONTROLLING CURRENT FLOW THERETHROUGH; A ROTOR MOUNTED FOR ROTATION CONCENTRICALLY RELATIVE TO THE STATOR; PILOT TRIGGERING MEANS FOR SEQUENTIALLY ENERGIZING SAID SWITCHING DEVICES INDEPENDENTLY OF THE SPEED OF ROTATION OF SAID ROTOR; AND MEANS RESPONSIVE TO THE ENERGIZATION OF EACH SWITCHING DEVICE FOR DEENERGIZING A PREVIOUSLY ENERGIZED SWITCHING DEVICE SEPARATED FROM THE SWITCHING DEVICE BEING ENERGIZED BY MORE THAN ONE DEVICE IN THE SEQUENCE OF ENERGIZATION WHEREBY A PLURALITY OF STATOR WINDINGS ARE ENERGIZED SIMULTANEOUSLY AND A ROTATING MAGNETIC FIELD IS PRODUCED BY SAID STATOR FOR APPLYING TORQUE TO SAID ROTOR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |