Patent US3105181A successfully refreshed from Google Patents.
US3105181A
Expired / Lapsed
US
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Limit control for motors
Assignee: Schneider Electric USA Inc
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Filing: 1959-12-30
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Granted: 1963-09-24
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Expires: 1979-12-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Calvin B Sanborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:52
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/16; H02P25/32; H02P25/325; B; B66; B66C; B66C13/00; B66C13/18; B66C13/22; B66C13/23; B66C13/26; B66C2700/00; B66C2700/08; B66C2700/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A CONTROL SYSTEM FOR CONTROLLING THE MODE OF OPERATION OF A MULTI-PHASE MOTOR BY CONTROLLING THE ENERGIZATION, FROM A MULTI-PHASE SOURCE OF POWER, OF EACH OF THE WINDINGS OF THE MOTOR, AND COMPRISING FIRST MEANS OPERATIVE TO EFFECT ENERGIZATION OF THE MOTOR WINDINGS BY THE SOURCE OF POWER TO CAUSE THE MOTOR TO OPERATE IN A FIRST MODE OF OPERATION, CURRENT CONDUCTOR MEANS, LIMIT CONTROL MEANS RESPONSIVE TO OPERATION OF SAID MOTOR BEYOND A CERTAIN LIMIT OF OPERATION IN SAID FIRST MODE OF OPERATION TO DISCONTINUE THE ENERGIZATION OF SAID MOTOR WINDINGS BY SAID SOURCE OF POWER AND TO FORM A CLOSED LOOP INCLUDING SAID CURRENT CONDUCTOR MEANS AND AT LEAST ONE OF SAID MOTOR WINDINGS, A STANDBY CIRCUIT, SAID LIMIT CONTROL MEANS ALSO BEING OPERABLE CONCURRENTLY WITH DISCONTINUANCE OF ENERGIZATION OF THE MOTOR WINDINGS TO CONNECT A MOTOR WINDING EXTRANEOUS OF THE CLOSED LOOP FOR SUBSEQUENT ENERGIZATION BY SAID STANDBY CIRCUIT, AND SECOND MEANS OPERATIVE WHILE SAID LIMIT CONTROL MEANS IS TRIPPED TO CLOSE SAID STANDBY CIRCUIT, THEREBY TO REVERSE ENERGIZATION OF THE MOTOR WINDINGS TO CAUSE SAID MOTOR TO OPERATE IN A DIFFERENT MODE OF OPERATION.
Claim 2
Dependent Claim
188 words
A CONTROL SYSTEM FOR CONTROLLING THE MODE OF OPERATION OF A MULTI-PHASE MOTOR BY CONTROLLING THE ENERGIZATION, FROM A MULTI-PHASE SOURCE OF POWER, OF EACH OF THE WINDINGS OF THE MOTOR, AND COMPRISING FIRST MEANS OPERATIVE TO EFFECT ENERGIZATION OF THE MOTOR WINDINGS BY THE SOURCE OF POWER TO CAUSE THE MOTOR TO OPERATE IN A FIRST MODE OF OPERATION, CURRENT CONDUCTOR MEANS, LIMIT CONTROL MEANS RESPONSIVE TO OPERATION OF SAID MOTOR BEYOND A CERTAIN LIMIT OF OPERATION IN SAID FIRST MODE OF OPERATION TO DISCONTINUE THE ENERGIZATION OF SAID MOTOR WINDINGS BY SAID SOURCE OF POWER AND TO FORM A CLOSED LOOP INCLUDING SAID CURRENT CONDUCTOR MEANS AND AT LEAST ONE OF SAID MOTOR WINDINGS, A STANDBY CIRCUIT, SAID LIMIT CONTROL MEANS ALSO BEING OPERABLE CONCURRENTLY WITH DISCONTINUANCE OF ENERGIZATION OF THE MOTOR WINDINGS TO CONNECT A MOTOR WINDING EXTRANEOUS OF THE CLOSED LOOP FOR SUBSEQUENT ENERGIZATION BY SAID STANDBY CIRCUIT, AND SECOND MEANS OPERATIVE WHILE SAID LIMIT CONTROL MEANS IS TRIPPED TO CLOSE SAID STANDBY CIRCUIT, THEREBY TO REVERSE ENERGIZATION OF THE MOTOR WINDINGS TO CAUSE SAID MOTOR TO OPERATE IN A DIFFERENT MODE OF OPERATION.
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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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |