US3585552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1969-04-10
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Granted: 1971-06-15
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Expires: 1989-04-10
Abstract
Abstract Electrical apparatus having an electrical conductor insulated with solid insulating means, which is impregnated with a liquid dielectric. The solid insulating means includes paper having a fibrous web formed of wholly aromatic polyamide fibers.
Inventors
- 👤 Landis E Feather
- 👤 Paul Voytik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:07
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/323
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
Electrical inductive apparatus having more inductive reactance than capacitive reactance at power frequencies, comprising: an enclosure, liquid dielectric means disposed in said enclosure, at least one electrical winding, including leads, immersed in said liquid dielectric means, said at least one electrical winding being adapted for connection to an electrical potential, and solid insulating means disposed to electrically insulate at least a portion of said electrical winding, with said liquid dielectric means impregnating said solid insulating means, said solid insulating means including paper consisting essentially of a fibrous web formed of wholly aromatic polyamide fibers.
Claim 2
Dependent Claim
94 words
Electrical inductive apparatus having more inductive reactance than capacitive reactance at power frequencies, comprising: an enclosure, liquid dielectric means disposed in said enclosure, at least one electrical winding, including leads, immersed in said liquid dielectric means, said at least one electrical winding being adapted for connection to an electrical potential, and solid insulating means disposed to electrically insulate at least a portion of said electrical winding, with said liquid dielectric means impregnating said solid insulating means, said solid insulating means including paper consisting essentially of a fibrous web formed of wholly aromatic polyamide fibers.
Claim 3
Dependent Claim
14 words
The electrical apparatus of claim 1 wherein the liquid dielectric means is mineral oil.
Claim 4
Dependent Claim
15 words
The electrical apparatus of claim 1 wherein the liquid dielectric means is a synthetic liquid.
Claim 5
Dependent Claim
25 words
The electrical apparatus of claim 1 wherein the solid insulating means includes a plurality of layers of paper, each formed of wholly aromatic polyamide fibers.
Claim 6
Dependent Claim
29 words
The electrical apparatus of claim 1 wherein the electrical apparatus Is a transformer, and the solid insulating means is the turn-to-turn insulation on the at least one electrical winding.
Claim 7
Dependent Claim
33 words
The electrical apparatus of claim 1 wherein the electrical apparatus is a transformer, and the solid insulating means is disposed to electrically insulate at least one lead of at least one electrical winding.
Claim 8
Dependent Claim
44 words
The electrical apparatus of claim 1 wherein the electrical apparatus is a transformer, and including tap changing means, and wherein the solid insulating means is disposed to insulate a lead from the at least one winding of the transformer to the tap changing means.
Claim 9
Dependent Claim
88 words
Electrical transformer apparatus, comprising: an enclosure, liquid dielectric means disposed in said enclosure, at least first and second electrical windings, each having a plurality of conductor turns and electrical leads, disposed in said enclosure and immersed in said liquid dielectric means, and solid insulating means disposed to electrically insulate at least a portion of one of said electrical windings, said solid insulating means being impregnated with said liquid dielectric means, said solid insulating means including paper consisting essentially of a fibrous web formed of wholly aromatic polyamide fibers.
Claim 10
Dependent Claim
88 words
Electrical transformer apparatus, comprising: an enclosure, liquid dielectric means disposed in said enclosure, at least first and second electrical windings, each having a plurality of conductor turns and electrical leads, disposed in said enclosure and immersed in said liquid dielectric means, and solid insulating means disposed to electrically insulate at least a portion of one of said electrical windings, said solid insulating means being impregnated with said liquid dielectric means, said solid insulating means including paper consisting essentially of a fibrous web formed of wholly aromatic polyamide fibers.
Claim 11
Dependent Claim
21 words
The electrical transformer apparatus of claim 8, wherein the solid insulating means is disposed between the first and second electrical windings.
Claim 12
Dependent Claim
19 words
The electrical transformer apparatus of claim 9, wherein the first and second electrical windings are concentrically adjacent one another.
Claim 13
Dependent Claim
28 words
The electrical transformer apparatus of claim 8, wherein the solid insulating means is disposed to electrically insulate the conductor turns of at least one of the electrical windings.
Claim 14
Dependent Claim
30 words
The electrical transformer apparatus of claim 8, wherein the solid insulating means is disposed about at least one of the electrical leads of at least one of the electrical windings.
Claim 15
Dependent Claim
15 words
The electrical transformer apparatus of claim 8, wherein the liquid dielectric means is mineral oil.
Claim 16
Dependent Claim
16 words
The electrical transformer apparatus of claim 8, wherein the liquid dielectric means is a synthetic liquid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |