Patent US3211983A successfully refreshed from Google Patents.
US3211983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor speed control apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1962-10-18
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Granted: 1965-10-12
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Expires: 1982-10-18
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Dolphin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:04
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/30; H02P7/305; B; B21; B21B; B21B37/00; B21B37/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN SPEED CONTROL APPARATUS FOR A MOTOR HAVING AN ARMATURE AND A FIELD WINDING, THE COMBINATION OF SPEED REFERENCE SIGNAL MEANS FOR PRODUCING A SPEED SIGNAL IN ACCORDANCE WITH THE DESIRE MOTOR OPERATING SPEED, FIRST REGULATOR MEANS RESPONSIVE TO SAID SPEED SIGNAL AND TO THE ACTUAL SPEED OF THE MOTOR AND OPERATIVE TO ENERGIZE SAID ARMATURE TO CAUSE THE MOTOR TO OPERATE IN ACCORDANCE WITH A PREDETERMINED RELATIONSHIP BETWEEN SAID SPEED SIGNAL AND THE ACTUAL MOTOR SPEED, AND SECOND REGULATOR MEANS RESPONSIVE TO THE ACTIAL SPEED OF THE MOTOR AND THE COUNTER ELECTROMOTIVE FORCE OF THE MOTOR, AND BEING OPERATIVE TO ENERGIZE SAID FIELD WINDING IN ACCORDANCE WITH A PREDETERMINED RELATIONSHIP BETWEEN
Claim 2
Dependent Claim
112 words
IN SPEED CONTROL APPARATUS FOR A MOTOR HAVING AN ARMATURE AND A FIELD WINDING, THE COMBINATION OF SPEED REFERENCE SIGNAL MEANS FOR PRODUCING A SPEED SIGNAL IN ACCORDANCE WITH THE DESIRE MOTOR OPERATING SPEED, FIRST REGULATOR MEANS RESPONSIVE TO SAID SPEED SIGNAL AND TO THE ACTUAL SPEED OF THE MOTOR AND OPERATIVE TO ENERGIZE SAID ARMATURE TO CAUSE THE MOTOR TO OPERATE IN ACCORDANCE WITH A PREDETERMINED RELATIONSHIP BETWEEN SAID SPEED SIGNAL AND THE ACTUAL MOTOR SPEED, AND SECOND REGULATOR MEANS RESPONSIVE TO THE ACTIAL SPEED OF THE MOTOR AND THE COUNTER ELECTROMOTIVE FORCE OF THE MOTOR, AND BEING OPERATIVE TO ENERGIZE SAID FIELD WINDING IN ACCORDANCE WITH A PREDETERMINED RELATIONSHIP BETWEEN
References Cited (Backward Citations)
US2964691A
Cited
US3026464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |