US3098958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-current motor and the like
Assignee: Individual
•
Filing: 1959-04-07
•
Granted: 1963-07-23
•
Expires: 1979-04-07
Abstract
No abstract record available.
Inventors
- 👤 Katz Leonhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5383; H02M7/53832; H02M7/53835; H02K; H02K29/00; H02K29/06; H02K29/12; H02P; H02P6/00; H02P6/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
MOTOR APPARATUS AND THE LIKE HAVING, IN COMBINATION, A STATOR MAGNETIC CIRCUIT COMPRISING A PAIR OF FIXED WINDINGS ONE OF WHICH CONSTITUTES THE STATOR WINDING OF THE MOTOR AND THE LIKE AND THE OTHER FIXED WINDING OF WHICH IS COUPLED TO THE STATOR WINDING, A MOVABLE SECONDARY WINDING CONSTITUTING THE ROTOR DISPOSED ADJACENT THE SAID STATOR WINDING AND ELECTOR-MEGNETICALLY COUPLED THERETO, A SOURCE OF DIRECT-CURRENT VOLTAGE, A PAIR OF TRANSISTORS SWITCHING MEANS CONNECTED IN PUSH PULL TO THE SAID STATOR WINDING AND TO THE SOURCE, AND A FEEDBACK PATH CONNECTED FROM THE SAID OTHER FIXED WINDING TO THE TRANSISTOR SWITCHING MEANS FOR LIMITING THE PERIOD OF OPERATION THEREOF IN ORDER TO APPLY AN ALTERNATING-CURRENT VOLTAGE TO THE SAID STATOR WINDING, SAID FIXED WINDINGS BEING CONNECTED THROUGH A D.C. PATH INCLUDING IMPEDANCE MEANS, THE TIME CONSTANTS OF THE CIRCUIT INCLUDING THE SWITCHING MEANS, THE FEEDBACK PATH, THE IMPEDANCE MEANS AND THE STATOR WINDING DETERMINING THE FREQUENCY OF THE SAID ALTERNATING-CURRENT VOLTAGE SUBSTANTIALLY INDEPENDENTLY OF THE MOVEMENT OF THE ROTOR.
Claim 2
Dependent Claim
168 words
MOTOR APPARATUS AND THE LIKE HAVING, IN COMBINATION, A STATOR MAGNETIC CIRCUIT COMPRISING A PAIR OF FIXED WINDINGS ONE OF WHICH CONSTITUTES THE STATOR WINDING OF THE MOTOR AND THE LIKE AND THE OTHER FIXED WINDING OF WHICH IS COUPLED TO THE STATOR WINDING, A MOVABLE SECONDARY WINDING CONSTITUTING THE ROTOR DISPOSED ADJACENT THE SAID STATOR WINDING AND ELECTOR-MEGNETICALLY COUPLED THERETO, A SOURCE OF DIRECT-CURRENT VOLTAGE, A PAIR OF TRANSISTORS SWITCHING MEANS CONNECTED IN PUSH PULL TO THE SAID STATOR WINDING AND TO THE SOURCE, AND A FEEDBACK PATH CONNECTED FROM THE SAID OTHER FIXED WINDING TO THE TRANSISTOR SWITCHING MEANS FOR LIMITING THE PERIOD OF OPERATION THEREOF IN ORDER TO APPLY AN ALTERNATING-CURRENT VOLTAGE TO THE SAID STATOR WINDING, SAID FIXED WINDINGS BEING CONNECTED THROUGH A D.C. PATH INCLUDING IMPEDANCE MEANS, THE TIME CONSTANTS OF THE CIRCUIT INCLUDING THE SWITCHING MEANS, THE FEEDBACK PATH, THE IMPEDANCE MEANS AND THE STATOR WINDING DETERMINING THE FREQUENCY OF THE SAID ALTERNATING-CURRENT VOLTAGE SUBSTANTIALLY INDEPENDENTLY OF THE MOVEMENT OF THE ROTOR.
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) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |