US3307074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer structure with built-in overvoltage protection
Assignee: Westinghouse Electric Corp
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Filing: 1964-11-05
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Granted: 1967-02-28
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Expires: 1984-11-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Lockie
- 👤 Leonard L Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:51
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/323; H01F27/40; H01F27/402; H01F27/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
ELECTRICAL APPARATUS COMPRISING FIRST MEANS HAVING AN ELECTRICAL POTENTIAL OF A PREDETERMINED MAGNITUDE DURING NORMAL OPERATION OF SAID ELECTRICAL APPARATUS, SECOND MEANS HAVING A VOLTAGE DEPENDENT RESISTIVITY WHICH ALLOWS SUBSTANTIALLY NO CURRENT FLOW AT THE PREDETERMINED POTENTIAL OF SAID FIRST MEANS, SAID SECOND MEANS ALLOWING CURRENT TO FLOW AT POTENTIALS IN EXCESS OF SAID PREDETERMINED VOLTAGE, SAID SECOND MEANS BEING DISPOSED IN CONTACT WITH SAID FIRST MEANS TO PROVIDE ELECTRICAL INSULATION FOR SAID FIRST MEANS, SAID SECOND MEANS PROTECTING ITSELF BY ALLOWING CURRENT TO FLOW WHEN THE POTENTIAL OF SAID FIRST MEANS EXCEEDS ITS PREDETERMINED MAGNITUDE.
Claim 2
Dependent Claim
96 words
ELECTRICAL APPARATUS COMPRISING FIRST MEANS HAVING AN ELECTRICAL POTENTIAL OF A PREDETERMINED MAGNITUDE DURING NORMAL OPERATION OF SAID ELECTRICAL APPARATUS, SECOND MEANS HAVING A VOLTAGE DEPENDENT RESISTIVITY WHICH ALLOWS SUBSTANTIALLY NO CURRENT FLOW AT THE PREDETERMINED POTENTIAL OF SAID FIRST MEANS, SAID SECOND MEANS ALLOWING CURRENT TO FLOW AT POTENTIALS IN EXCESS OF SAID PREDETERMINED VOLTAGE, SAID SECOND MEANS BEING DISPOSED IN CONTACT WITH SAID FIRST MEANS TO PROVIDE ELECTRICAL INSULATION FOR SAID FIRST MEANS, SAID SECOND MEANS PROTECTING ITSELF BY ALLOWING CURRENT TO FLOW WHEN THE POTENTIAL OF SAID FIRST MEANS EXCEEDS ITS PREDETERMINED MAGNITUDE.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |