US3151479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for testing dynamoelectric machines
Assignee: General Electric Co
•
Filing: 1961-08-22
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Granted: 1964-10-06
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Expires: 1981-08-22
Abstract
No abstract record available.
Inventors
- 👤 David M Willyoung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:22
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
THE METHOD OF TESTING THE COOLING ARRANGEMENT FOR GENERATOR FIELD WINDINGS COMPRISING THE STEPS OF PROVIDING A GENERATOR HAVING A WOUND ROTOR FOR PRODUCING A ROTATING MAGNETIC FIELD FOR THE GENERATOR, SAID ROTOR INCLUDING A PLURALITY OF SERIES-CONNECTED FLUID-COOLED COILS THEREON, TEMPORARILY CHANGING THE CONNECTIONS BETWEEN SOME OF SAID COILS TO DECREASE THE NET MAGNETOMOTIVE FORCE PRODUCED BY THE COMBINED COILS WITHOUT SUBSTANTIALLY CHANGING THE COOLING ARRANGEMENT OF THE COILS, AND OPERATING SAID GENERATOR AT SUBSTANTIALLY NO LOAD WITH SUBSTANTIALLY "RATED" FIELD EXCITATION CURRENT WHILE MEASURING THE EFFECTIVENESS OF SAID COOLING ARRANGEMENT.
References Cited (Backward Citations)
US3049633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |