Patent US3309592A successfully refreshed from Google Patents.
US3309592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic switching system for motors
Assignee: GOLAY BUCHEL AND CIE
•
Filing: 1964-01-28
•
Granted: 1967-03-14
•
Expires: 1984-01-28
Abstract
No abstract record available.
Inventors
- 👤 Favre Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:02
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/14; H02P6/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A CONTROL CIRCUIT FOR A D.C. POWERED A.C. MOTOR HAVING A STATOR WINDING AND A POWER CIRCUIT COMPRISING: (1) A MONOSTABLE MULTIVIBRATOR CONNECTED WITH SAID CONTROL CIRCUIT; (2) POWER TRANSISTORS CONNECTED TO SAID STATOR WINDING FOR ENERGIZING THE SAME IN BOTH CURRENT DIRECTIONS; (3) AT LEAST TWO VOLTAGE-CONTROL PRODUCING MEANS CONNECTED IN THE BASE CIRCUIT OF SAID POWER TRANSISTORS AND WITH SAID MONOSTABLE MULTIVIBRATOR, ONE OF SAID MEANS ACTING ON ONE OF SAID POWER TRANSISTORS DURING ONE CURRENT DIRECTION AND THE OTHER CONTROLLING SAID OTHER POWER TRANSISTOR FOR THE OTHER CURRENT DIRECTION; (4) SWITCHING MEANS CONTROLLED BY THE MOTOR CURRENT FOR MAKING SAID POWER TRANSISTOR NON-CONDUCTIVE WHENEVER A GIVEN MAXIMUM VALUE OF THE MOTOR CURRENT IS EXCEEDED, AND FOR MAKING IT AGAIN CONDUCTIVE WHENEVER THE MOTOR CURRENT FALLS BELOW A GIVEN VALUE; (5) AN AUXILIARY CIRCUIT HAVING AN OPERATIVE MEMBER CONNECTED TO SAID SWITCHING MEANS FOR ADJUSTING THE THRESHOLD VALUE OF THE VOLTAGE OF THE SWITCHING MEANS AS A FUNCTION OF THE SPEED OF ROTATION OF THE MOTOR.
Claim 2
Dependent Claim
168 words
A CONTROL CIRCUIT FOR A D.C. POWERED A.C. MOTOR HAVING A STATOR WINDING AND A POWER CIRCUIT COMPRISING: (1) A MONOSTABLE MULTIVIBRATOR CONNECTED WITH SAID CONTROL CIRCUIT; (2) POWER TRANSISTORS CONNECTED TO SAID STATOR WINDING FOR ENERGIZING THE SAME IN BOTH CURRENT DIRECTIONS; (3) AT LEAST TWO VOLTAGE-CONTROL PRODUCING MEANS CONNECTED IN THE BASE CIRCUIT OF SAID POWER TRANSISTORS AND WITH SAID MONOSTABLE MULTIVIBRATOR, ONE OF SAID MEANS ACTING ON ONE OF SAID POWER TRANSISTORS DURING ONE CURRENT DIRECTION AND THE OTHER CONTROLLING SAID OTHER POWER TRANSISTOR FOR THE OTHER CURRENT DIRECTION; (4) SWITCHING MEANS CONTROLLED BY THE MOTOR CURRENT FOR MAKING SAID POWER TRANSISTOR NON-CONDUCTIVE WHENEVER A GIVEN MAXIMUM VALUE OF THE MOTOR CURRENT IS EXCEEDED, AND FOR MAKING IT AGAIN CONDUCTIVE WHENEVER THE MOTOR CURRENT FALLS BELOW A GIVEN VALUE; (5) AN AUXILIARY CIRCUIT HAVING AN OPERATIVE MEMBER CONNECTED TO SAID SWITCHING MEANS FOR ADJUSTING THE THRESHOLD VALUE OF THE VOLTAGE OF THE SWITCHING MEANS AS A FUNCTION OF THE SPEED OF ROTATION OF THE MOTOR.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |