Patent US3333221A successfully refreshed from Google Patents.
US3333221A
Expired / Lapsed
US
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Transformer having temperature responsive leakage reactance
Assignee: Westinghouse Electric Corp
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Filing: 1965-08-20
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Granted: 1967-07-25
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Lockie
- 👤 Andrew W Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:09
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/40; H01F27/402; H01F27/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN ELECTRICAL TRANSFORMER COMPRISING A MAGNETIC CORE, FIRST AND SECOND WINDINGS DISPOSED IN INDUCTIVE RELATION WITH SAID MAGNETIC CORE AND IN SPACED CONCENTRIC RELATION RELATIVE TO ONE ANOTHER, MEANS HAVING PREDETERMINED TEMPERATURE RESPONSIVE MAGNETIC CHARACTERISTICS DISPOSED BETWEEN SAID SPACED CONCENTRIC FIRST AND SECOND WINDINGS, SAID MEANS BEING NON-MAGNETIC UNTIL A PREDETERMINED ELEVATED TEMPERATURE IS REACHED, WHICH CAUSES THE LEAKAGE RECTANCE OF SAID ELECTRICAL INDUCTIVE APPARATUS TO INCREASE WHEN SAID PREDETERMINED TEMPERATURE IS REACHED.
Claim 2
Dependent Claim
73 words
AN ELECTRICAL TRANSFORMER COMPRISING A MAGNETIC CORE, FIRST AND SECOND WINDINGS DISPOSED IN INDUCTIVE RELATION WITH SAID MAGNETIC CORE AND IN SPACED CONCENTRIC RELATION RELATIVE TO ONE ANOTHER, MEANS HAVING PREDETERMINED TEMPERATURE RESPONSIVE MAGNETIC CHARACTERISTICS DISPOSED BETWEEN SAID SPACED CONCENTRIC FIRST AND SECOND WINDINGS, SAID MEANS BEING NON-MAGNETIC UNTIL A PREDETERMINED ELEVATED TEMPERATURE IS REACHED, WHICH CAUSES THE LEAKAGE RECTANCE OF SAID ELECTRICAL INDUCTIVE APPARATUS TO INCREASE WHEN SAID PREDETERMINED TEMPERATURE IS REACHED.
References Cited (Backward Citations)
US3239783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |