US3275918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for a plural motor drive with load equalization
Assignee: Youngstown Res and Dev Co
•
Filing: 1964-04-21
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Granted: 1966-09-27
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Expires: 1984-04-21
Abstract
No abstract record available.
Inventors
- 👤 Louis H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:55
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/46; B21B37/28; E; E21; E21D; E21D23/00; E21D23/04; E21D23/0472
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
ELECTRIC APPARATUS COMPRISING A FIRST PAIR OF ELECTRIC MOTORS AT LEAST ONE OF WHICH IS DRIVINGLY CONNECTED TO A FIRST OUTPUT SHAFT, A SECOND PAIR OF ELECTRIC MOTORS AT LEAST ONE OF WHICH IS DRIVINGLY CONNEGTED TO A SECOND OUTPUT SHAFT, AN ARMATURE OF ONE OF SAID FIRST PAIR MOTORS CONNECTED ELECTRICALLY IN SERIES WITH AN ARMATURE OF ONE OF SAID SECOND PAIR MOTORS TO FORM A FIRST NEUTRAL POINT BETWEEN SAID SERIES CONNECTION, AN ARMATURE OF THE OTHER OF SAID FIRST PAIR MOTORS CONNECTED ELECTRICALLY IN SERIES WITH AN ARMATURE OF THE OTHER OF SAID SECOND PAIR MOTORS TO FORMS A SECOND NEUTRAL POINT BETWEEN SAID SERIES CONNECTION, A NEUTRAL CIRCUIT BETWEEN SAID FIRST AND SECOND NEUTRAL POINTS, SAID ARMATURE OF SAID ONE OF SAID FIRST PAIR MOTORS AND SAID ARMATURE OF SAID OTHER OF SAID SECOND PAIR MOTORS BEING CONNECTED,TO ONE SIDE OF A
Claim 2
Dependent Claim
146 words
ELECTRIC APPARATUS COMPRISING A FIRST PAIR OF ELECTRIC MOTORS AT LEAST ONE OF WHICH IS DRIVINGLY CONNECTED TO A FIRST OUTPUT SHAFT, A SECOND PAIR OF ELECTRIC MOTORS AT LEAST ONE OF WHICH IS DRIVINGLY CONNEGTED TO A SECOND OUTPUT SHAFT, AN ARMATURE OF ONE OF SAID FIRST PAIR MOTORS CONNECTED ELECTRICALLY IN SERIES WITH AN ARMATURE OF ONE OF SAID SECOND PAIR MOTORS TO FORM A FIRST NEUTRAL POINT BETWEEN SAID SERIES CONNECTION, AN ARMATURE OF THE OTHER OF SAID FIRST PAIR MOTORS CONNECTED ELECTRICALLY IN SERIES WITH AN ARMATURE OF THE OTHER OF SAID SECOND PAIR MOTORS TO FORMS A SECOND NEUTRAL POINT BETWEEN SAID SERIES CONNECTION, A NEUTRAL CIRCUIT BETWEEN SAID FIRST AND SECOND NEUTRAL POINTS, SAID ARMATURE OF SAID ONE OF SAID FIRST PAIR MOTORS AND SAID ARMATURE OF SAID OTHER OF SAID SECOND PAIR MOTORS BEING CONNECTED,TO ONE SIDE OF A
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |