US3304481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for direct current miniature motors without mechanical commutators
Assignee: Siemens Schuckertwerke AG
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Filing: 1964-07-29
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Granted: 1967-02-14
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Expires: 1984-07-29
Abstract
No abstract record available.
Inventors
- 👤 Saussele Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:44
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06; H02K29/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
AN ELECTRIC MOTOR CIRCUIT COMPRISING A DIRECT-CURRENT MINIATURE MOTOR WITHOUT MECHANICAL COMMUTATORS, SAID MOTOR HAVING A PERMANENT-MAGNET ROTOR AND STAR-CONNECTED STATOR WINDINGS, DIRECT-CURRENT CIRCUIT MEANS CONNECTED TO SAID RESPECTIVE WINDINGS FOR SEQUENTIALLY ENERGIZING THEM BY DIRECT CURRENT TO PRODUCE A ROTATING MAGNETIC FIELD, SAID CIRCUIT MEANS COMPRISING CURRENT CONTROL MEANS RESPONSIVE TO VOLTAGE INDUCED BY SAID ROTOR IN SAID STATOR WINDINGS DURING RESPECTIVE INTERVALS BETWEEN SAID ENERZING CURRENTS, WHEREBY THE ENERGIZING CURRENTS OF SAID RESPECTIVE STATOR WINDINGS ARE COMMUTATED UNDER CONTROL BY SAID INDUCED VOLTAGES.
Claim 2
Dependent Claim
85 words
AN ELECTRIC MOTOR CIRCUIT COMPRISING A DIRECT-CURRENT MINIATURE MOTOR WITHOUT MECHANICAL COMMUTATORS, SAID MOTOR HAVING A PERMANENT-MAGNET ROTOR AND STAR-CONNECTED STATOR WINDINGS, DIRECT-CURRENT CIRCUIT MEANS CONNECTED TO SAID RESPECTIVE WINDINGS FOR SEQUENTIALLY ENERGIZING THEM BY DIRECT CURRENT TO PRODUCE A ROTATING MAGNETIC FIELD, SAID CIRCUIT MEANS COMPRISING CURRENT CONTROL MEANS RESPONSIVE TO VOLTAGE INDUCED BY SAID ROTOR IN SAID STATOR WINDINGS DURING RESPECTIVE INTERVALS BETWEEN SAID ENERZING CURRENTS, WHEREBY THE ENERGIZING CURRENTS OF SAID RESPECTIVE STATOR WINDINGS ARE COMMUTATED UNDER CONTROL BY SAID INDUCED VOLTAGES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |