Patent US3108215A successfully refreshed from Google Patents.
US3108215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic control circuit for a. c. motors
Assignee: Schneider Electric USA Inc
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Filing: 1956-06-11
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Granted: 1963-10-22
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Expires: 1976-06-11
Abstract
No abstract record available.
Inventors
- 👤 Dorn L Pettit
- 👤 Robert C Montross
- 👤 Hutchinson Gildea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:37
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A SYSTEM FOR CONTROLLING POWER TO AN INDUCTION MOTOR FROM AN A.C. SOURCE, IN COMBINATION, AN ELASTRONIC CONTACTOR FOR REGULATING THE POWER TO SAID MOTOR, A RELAY CONTROL CIRCUIT FOR CONTROLLING THE MODE OF OPERATION OF SAID CONTACTOR, SAID CONTACTOR HAVING INDIVIDUAL POWER AND FIRING CONTROL CIRCUITS FOR EACH PHASE OF SAID SOURCE, EACH OF SAID FIRING CONTROL CIRCUITS INCLUDING INDIVIDUAL CIRCUITS FOR DIFFERENT MODES OF CONTROLLING THE POWER CIRCUIT, SAID RELAY CONTROL CIRCUIT INCLUDING OPERATING CIRCUIT MEANS FOR OPERATING A FIRST INDIVIDUAL CIRCUIT FOR A FIRST MODE OF OPERATION, ACCELERATION CIRCUIT MEANS INCLUDING SLOW OPERATING MEANS IN SAID OPENING CIRCUIT FOR ENERGIZING SAID ACCELERATION CIRCUIT MEANS A SHORT TIME PERIOD AFTER SAID FIRING CONTROL CIRCUIT IS OPERATED TO OPERATE A SECOND CIRCUIT IN SAID FIRING CONTROL CIRCUIT TO CHANGE TO A SECOND MODE OF CONTROLLING THE POWER CIRCUIT.
Claim 2
Dependent Claim
140 words
IN A SYSTEM FOR CONTROLLING POWER TO AN INDUCTION MOTOR FROM AN A.C. SOURCE, IN COMBINATION, AN ELASTRONIC CONTACTOR FOR REGULATING THE POWER TO SAID MOTOR, A RELAY CONTROL CIRCUIT FOR CONTROLLING THE MODE OF OPERATION OF SAID CONTACTOR, SAID CONTACTOR HAVING INDIVIDUAL POWER AND FIRING CONTROL CIRCUITS FOR EACH PHASE OF SAID SOURCE, EACH OF SAID FIRING CONTROL CIRCUITS INCLUDING INDIVIDUAL CIRCUITS FOR DIFFERENT MODES OF CONTROLLING THE POWER CIRCUIT, SAID RELAY CONTROL CIRCUIT INCLUDING OPERATING CIRCUIT MEANS FOR OPERATING A FIRST INDIVIDUAL CIRCUIT FOR A FIRST MODE OF OPERATION, ACCELERATION CIRCUIT MEANS INCLUDING SLOW OPERATING MEANS IN SAID OPENING CIRCUIT FOR ENERGIZING SAID ACCELERATION CIRCUIT MEANS A SHORT TIME PERIOD AFTER SAID FIRING CONTROL CIRCUIT IS OPERATED TO OPERATE A SECOND CIRCUIT IN SAID FIRING CONTROL CIRCUIT TO CHANGE TO A SECOND MODE OF CONTROLLING THE POWER CIRCUIT.
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |