Patent US3242407A successfully refreshed from Google Patents.
US3242407A
Expired / Lapsed
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Dual gain input circuit for generatorfed motor control system
Assignee: Imperial Electric Co
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Filing: 1963-01-14
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Granted: 1966-03-22
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Expires: 1983-01-14
Abstract
No abstract record available.
Inventors
- 👤 Hansen Hans Richard Ansgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:10
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/34; H02P7/347
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN A MOTOR GENERATOR DRIVE ARRANGEMENT WHEREIN THE MOTOR ARMATURE CIRCUIT IS DIRECTLY CONNECTED TO THE ARMATURE CIRCUIT OF THE GENERATOR AND SPEED CONTROL OF THE SYSTEM IS ACHIEVED BY VARYING THE MAGNITUDE OF THE SIGNAL APPLIED TO THE FIELD WINDING OF THE GENERATOR, A CONTROL SYSTEM PROVIDING A CONTROL SPEED VARIABLE EXCITATION SIGNAL TO THE GENERATOR FIELD WINDING COMPRISING, A FIRST CONTROL AMPLIFIER HAVING INPUT AND OUTPUT CIRCUITS, SAID OUTPUT CIRCUIT OF SAID FIRST CONTROL AMPLIFIER CONNECTED TO THE GENERATOR FIELD WINDING, A SECOND CONTROL AMPLIFIER HAVING INPUT AND OUTPUT CIRCUITS, SAID OUTPUT CIRCUIT OF SAID SEC OND CONTROL AMPLIFIER CONNECTED IN CIRCUIT WITH SAID INPUT CIRCUITS OF SAID FIRST CONTROL AMPLIFIER, REFERENCE SPEED SIGNAL MEAN IN CIRCUIT WITH EACH OF SAID AMPLIFIERS, AND FEEDBACK SIGNAL MEANS MODIFYING SAID REFERENCE SPEED SIGNAL IN ACCORDANCE WITH THE SPEED OF SAID MOTOR, WHEREBY AT HIGH SPEEDS THE SECOND CONTROL AMPLIFIER WILL HAVE APPROXIMATELY ZERO OUTPUT AND ACCORDINGLY NOT CONTRIBUTING TO THE SPEED CONTROL OF THE MOTOR,
Claim 2
Dependent Claim
165 words
IN A MOTOR GENERATOR DRIVE ARRANGEMENT WHEREIN THE MOTOR ARMATURE CIRCUIT IS DIRECTLY CONNECTED TO THE ARMATURE CIRCUIT OF THE GENERATOR AND SPEED CONTROL OF THE SYSTEM IS ACHIEVED BY VARYING THE MAGNITUDE OF THE SIGNAL APPLIED TO THE FIELD WINDING OF THE GENERATOR, A CONTROL SYSTEM PROVIDING A CONTROL SPEED VARIABLE EXCITATION SIGNAL TO THE GENERATOR FIELD WINDING COMPRISING, A FIRST CONTROL AMPLIFIER HAVING INPUT AND OUTPUT CIRCUITS, SAID OUTPUT CIRCUIT OF SAID FIRST CONTROL AMPLIFIER CONNECTED TO THE GENERATOR FIELD WINDING, A SECOND CONTROL AMPLIFIER HAVING INPUT AND OUTPUT CIRCUITS, SAID OUTPUT CIRCUIT OF SAID SEC OND CONTROL AMPLIFIER CONNECTED IN CIRCUIT WITH SAID INPUT CIRCUITS OF SAID FIRST CONTROL AMPLIFIER, REFERENCE SPEED SIGNAL MEAN IN CIRCUIT WITH EACH OF SAID AMPLIFIERS, AND FEEDBACK SIGNAL MEANS MODIFYING SAID REFERENCE SPEED SIGNAL IN ACCORDANCE WITH THE SPEED OF SAID MOTOR, WHEREBY AT HIGH SPEEDS THE SECOND CONTROL AMPLIFIER WILL HAVE APPROXIMATELY ZERO OUTPUT AND ACCORDINGLY NOT CONTRIBUTING TO THE SPEED CONTROL OF THE MOTOR,
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |