Patent US3249903A successfully refreshed from Google Patents.
US3249903A
Expired / Lapsed
US
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Transformer casing structure having shielded terminals
Assignee: WILLIAM D TARRANT
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Filing: 1964-12-21
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Granted: 1966-05-03
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas U Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:54
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
143 words
AN ELECTRICAL TRANSFORMER COMPRISING, A TANK POSITIONABLE IN AN UPRIGHT POSITION, A CORE AND COIL ASSEMBLY HAVING WINDINGS AND MOUNTED IN SAID TANK, A FIRST VOLTAGE TERMINAL MOUNTED ON AN UPPER PORTION OF SAID TANK AND IN ELECTRICAL CONTACT WITH SAID WINDINGS, A SECOND VOLTAGE TERMINAL MOUNTED ON THE BOTTOM OF SAID TANK AND IN ELECTRICAL CONTACT WITH SAID WINDINGS, AND AXIALLY EXTENDING SKIRT PORTION ON THE LOWER PORTION OF SAID TANK AND EXTENDING THEREFROM A DISTANCE GREATER THAN THE LENGTH OF SAID SECOND TERMINAL, AND ACCESS APERTURE IN SAID AXIALLY EXTENDING SKIRT AND POSITIONED THEREIN TO GIVE READY ACESS TO SAID SECOND TERMINAL, AND TAP CHANGER MEANS MOUNTED WITHIN SAID TANK IN ELECTRICAL CONTACT RELATION WITH SAID COIL ASSEMBLY AND HAVING ACTUATING MEANS ACCESSIBLE THROUGH SAID BOTTOM OF SAID TANK, SAID TRANSFORMER ADAPTED FOR EASE, SAFETY AND SIMPLICITY OF INSTALLATION AND MAINTENANCE.
References Cited (Backward Citations)
US2668274A
Cited
US3164794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |