US3560835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for protecting electric power converter from commutation failure
Assignee: General Electric Co
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Filing: 1969-01-03
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Granted: 1971-02-02
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Expires: 1989-01-03
Abstract
Abstract POWER CONVERSION APPARATUS USING ELECTRIC VALVES TO CONTROL THE POWER DELIVERED FROM A SOURCE OF ELECTRICITY TO A LOAD CIRCUIT IS PROTECTED FROM COMMUTATION FAILURE BY PROVIDING MEANS RESPONSIVE TO THE APPARATUS OPERATING WITH A MARGIN ANGLE THAT IS SMALLER THAN A DESIRED MINIMUM FOR ACTIVATING MEANS FOR ADDING CAPACITANCE TO THE LOAD CIRCUIT. IN ONE FORM OF THE INVENTION, A REDUCED-SCALE, INCREASED-SENSITIVITY MIMIC CONVERSION APPARATUS IS USED TO DETECT INCIPENT COMMUTATION FAILURE.
Inventors
- 👤 Charles E Rettig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:53
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/27; H02M5/271; H02H; H02H7/00; H02H7/10; H02H7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |