US3629758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer using noncombustible fluid dielectric for cooling
Assignee: Westinghouse Electric Corp
•
Filing: 1969-10-14
•
Granted: 1971-12-21
•
Expires: 1989-10-14
Abstract
Abstract A fluid-cooled transformer having an outer casing of metal and an inner casing of electrical insulating material. The space between the outer and inner casings being substantially filled with solid or cellular insulating material. The inner casing has therein a core-coil assembly with fluid dielectric material filling the inner casing to a predetermined height. Bushings extend through the outer and inner casings for making necessary electrical connections to the coil.
Inventors
- 👤 Henry A Pearce Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/33; H01F27/02; H01F27/025; H01F27/28; H01F27/32; H01F27/321
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
64 words
A transformer comprising a core-coil assembly, an inner casing of electrical insulating material enclosing said core-coil assembly, an outer metallic casing enclosing said inner casing and said core-coil assembly, said inner casing being spaced from said outer casing, solid insulation substantially filling the space between said outer and inner casings, and liquid insulation in said inner casing, said liquid insulation surrounding said core-coil assembly.
Claim 2
Dependent Claim
64 words
A transformer comprising a core-coil assembly, an inner casing of electrical insulating material enclosing said core-coil assembly, an outer metallic casing enclosing said inner casing and said core-coil assembly, said inner casing being spaced from said outer casing, solid insulation substantially filling the space between said outer and inner casings, and liquid insulation in said inner casing, said liquid insulation surrounding said core-coil assembly.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein said inner casing is made of plastic material.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein the space between said outer and inner casings is substantially filled with cellular solid insulation.
Claim 5
Dependent Claim
20 words
The apparatus of claim 1 wherein the space between said outer and inner casings is substantially filled with foamed resin.
Claim 6
Dependent Claim
18 words
The apparatus of claim 1 wherein said inner casing contains a predetermined quantity of liquid dielectric containing chlorobiphenyl.
Claim 7
Dependent Claim
18 words
The apparatus of claim 1 wherein said inner casing contains a predetermined quantity of liquid dielectric containing fluorocarbon.
Claim 8
Dependent Claim
18 words
The apparatus of claim 1 wherein said inner casing contains a predetermined quantity of liquid dielectric containing fluorosilicone.
Claim 9
Dependent Claim
25 words
The apparatus of claim 1 comprising bushings passing through said outer and inner casings for connecting electrical conductors to the coil of said core-coil assembly.
Claim 10
Dependent Claim
17 words
The apparatus of claim 1 comprising means for cooling the liquid dielectric contained in said inner casing.
Claim 11
Dependent Claim
59 words
The apparatus of claim 7 wherein the means for cooling the liquid dielectric comprises an outlet connection and an inlet connection to said inner casing, conduits connected to said outlet and inlet connections, means connected to said conduit for force circulating said liquid dielectric, and heat exchange Means associated with said conduit for removing heat from said liquid dielectric.
References Cited (Backward Citations)
US366544A
Cited
US2734096A
Cited
US1931455A
Cited
GB489590A
Cited
GB484788A
Cited
US2413195A
Cited
US2489891A
Cited
US2774807A
Cited
US2816947A
Cited
US2875263A
Cited
GB853941A
Cited
US2999222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |