US3209226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for alternating current motor
Assignee: General Electric Co
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Filing: 1961-08-01
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Granted: 1965-09-28
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Expires: 1981-08-01
Abstract
No abstract record available.
Inventors
- 👤 Lawrence R Foote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:13
CPC Classifications
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
103 words
IN A MOTOR CONTROL SYSTEM FOR A MULTIPHASE ALTERNATING CURRENT MOTOR WHEREIN ALTERNATING CURRENT IS APPLIED TO SAID MOTOR THROUGH SATURABLE REACTIVE MEANS CONTROLLED BY TIME DURATION MODULATED DIRECT CURRENT, MAGNETIC AMPLIFIER MEANS OPERATIVE TO PRODUCE TIME DURATION MODUATING SIGNAL CONDITIONS IN ACCORDANCE WITH THE CONTROLLED SATURATION THEREOF, MEANS FOR ESTABLISHING SAID CONTROLLED SATURATION AS A FUNCTION OF THE DIFFERENCE BETWEEN DESIRED MOTOR SPEED AND EXISTING MOTOR SPEED, DIRECT CURRENT SUPPLY MEANS CONNECTED TO SAID SATURABLE REACTIVE MEANS AND RESPONSIVE TO SAID TIME DURATION MODULATING SIGNAL CONDITIONS TO SUPPLY TIME DURATION MODULATED DIRECT CURRENT THERETO, AND FEEDBACK MEANS CONTROLLED BY THE TIME DURA-
Claim 2
Dependent Claim
103 words
IN A MOTOR CONTROL SYSTEM FOR A MULTIPHASE ALTERNATING CURRENT MOTOR WHEREIN ALTERNATING CURRENT IS APPLIED TO SAID MOTOR THROUGH SATURABLE REACTIVE MEANS CONTROLLED BY TIME DURATION MODULATED DIRECT CURRENT, MAGNETIC AMPLIFIER MEANS OPERATIVE TO PRODUCE TIME DURATION MODUATING SIGNAL CONDITIONS IN ACCORDANCE WITH THE CONTROLLED SATURATION THEREOF, MEANS FOR ESTABLISHING SAID CONTROLLED SATURATION AS A FUNCTION OF THE DIFFERENCE BETWEEN DESIRED MOTOR SPEED AND EXISTING MOTOR SPEED, DIRECT CURRENT SUPPLY MEANS CONNECTED TO SAID SATURABLE REACTIVE MEANS AND RESPONSIVE TO SAID TIME DURATION MODULATING SIGNAL CONDITIONS TO SUPPLY TIME DURATION MODULATED DIRECT CURRENT THERETO, AND FEEDBACK MEANS CONTROLLED BY THE TIME DURA-
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |