US3109972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural generator fed motor control system
Assignee: Individual
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Filing: 1961-10-03
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Granted: 1963-11-05
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Expires: 1981-10-03
Abstract
No abstract record available.
Inventors
- 👤 Theodoric B Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:31
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/68; B; B60; B60L; B60L50/00; B60L50/10; B60L50/11; B62; B62D; B62D11/00; B62D11/02; B62D11/04; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70; Y02T10/7072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN AN ELECTRIC MOTOR CONTROL SYSTEM HAVING A PRIME MOVER, A COMPOUND-WOUND, DIRECT CURRENT GENERATOR DRIVEN THEREBY, A PLURALITY OF COMPOUND-WOUND, DIRECT CURRENT MOTORS WHOSE ARMATURES ARE CONNECTED IN A FIRST SERIES LOOP CIRCUIT WITH EACH OTHER AND WITH THE ARMATURE OF SAID GENERATOR AND SEPARATE MEANS FOR VARIABLY EXCITING THE SHUNT FIELDS OF SAID GENERATORS AND SAID MOTORS, THE COMBINATION COMPRISING A SEPARATE SECOND SERIES LOOP CIRCUIT CONNECTING THE SERIES FIELD WINDINGS OF SAID GENERATOR AND SAID MOTORS TO EACH OTHER; MEANS RESPONSIVE TO THE CURRENT IN THE FIRST SERIES LOOP CIRCUIT FOR EXCITING THE SAID SERIES FIELD WINDINGS WITH A CURRENT PROPORTIONAL TO THE CURRENT IN THE ARMATURES OF SAID MOTORS; AND MEANS RESPONSIVE TO THE CURRENT IN THE FIRST SERIES LOOP CIRCUIT FOR MAINTAINING THE CURRENT IN SAID SERIES FIELD WINDINGS IN A CONSTANT DIRECTION DESPITE A REVERSAL OF CURRENT IN THE ARMATURES OF SAID MOTORS.
Claim 2
Dependent Claim
149 words
IN AN ELECTRIC MOTOR CONTROL SYSTEM HAVING A PRIME MOVER, A COMPOUND-WOUND, DIRECT CURRENT GENERATOR DRIVEN THEREBY, A PLURALITY OF COMPOUND-WOUND, DIRECT CURRENT MOTORS WHOSE ARMATURES ARE CONNECTED IN A FIRST SERIES LOOP CIRCUIT WITH EACH OTHER AND WITH THE ARMATURE OF SAID GENERATOR AND SEPARATE MEANS FOR VARIABLY EXCITING THE SHUNT FIELDS OF SAID GENERATORS AND SAID MOTORS, THE COMBINATION COMPRISING A SEPARATE SECOND SERIES LOOP CIRCUIT CONNECTING THE SERIES FIELD WINDINGS OF SAID GENERATOR AND SAID MOTORS TO EACH OTHER; MEANS RESPONSIVE TO THE CURRENT IN THE FIRST SERIES LOOP CIRCUIT FOR EXCITING THE SAID SERIES FIELD WINDINGS WITH A CURRENT PROPORTIONAL TO THE CURRENT IN THE ARMATURES OF SAID MOTORS; AND MEANS RESPONSIVE TO THE CURRENT IN THE FIRST SERIES LOOP CIRCUIT FOR MAINTAINING THE CURRENT IN SAID SERIES FIELD WINDINGS IN A CONSTANT DIRECTION DESPITE A REVERSAL OF CURRENT IN THE ARMATURES OF SAID MOTORS.
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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |