US3676579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer lead insulator and method of making same
Assignee: Westinghouse Electric Corp
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Filing: 1971-08-02
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Granted: 1972-07-11
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Expires: 1991-08-02
Abstract
Abstract High voltage lead insulator for shell-form transformers and method of constructing same. Hollow cylindrical members, being constructed of pressboard and having one of their ends flared, are coaxially positioned with respect to each other and are mounted over a circular opening in a U-shaped channel member. Adhesive is disposed between the flared surfaces to reinforce the structure.
Inventors
- 👤 Thomas J Lanoue
- 👤 John G De Neef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:35
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/04; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/301; Y; Y10; Y10S; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A transformer lead insulator comprising a U-shaped channel member having two sides and a top portion, a tubular member having first and second ends and a laminated wall, the first end of said tubular member being attached by a suitable means to the top portion of said channel member and positioned over a circular opening therein, said tubular member comprising a pluraLity of hollow cylindrical members which are coaxially positioned with respect to each other to form the laminated tubular member wall.
Claim 2
Dependent Claim
82 words
A transformer lead insulator comprising a U-shaped channel member having two sides and a top portion, a tubular member having first and second ends and a laminated wall, the first end of said tubular member being attached by a suitable means to the top portion of said channel member and positioned over a circular opening therein, said tubular member comprising a pluraLity of hollow cylindrical members which are coaxially positioned with respect to each other to form the laminated tubular member wall.
Claim 3
Dependent Claim
29 words
The transformer lead insulator of claim 1, wherein the channel member and the hollow cylindrical members are constructed of pressboard, with a suitable adhesive disposed between adjacent cylindrical members.
Claim 4
Dependent Claim
96 words
The transformer lead insulator of claim 1, wherein the means for attaching the tubular member comprises a joint which is formed by the ends of the hollow cylindrical members and by the flared area of the channel member which is adjacent to the opening therein, one end of a first cylindrical member being flared and positioned adjacent to the inside of the flared channel member opening, one end of a second cylindrical member being flared and positioned adjacent to the outside of the flared channel member opening, with a suitable adhesive disposed between adjacent flare surfaces.
Claim 5
Dependent Claim
27 words
The transformer lead insulator of claim 3, wherein the adhesive which is disposed between adjacent flare surfaces comprises a mixture of polyvinyl chloride, water and pressboard particles.
Claim 6
Dependent Claim
28 words
The transformer lead insulator of claim 3, wherein the adhesive which is disposed between adjacent flare surfaces comprises a mixture of polyvinyl chloride, water and virgin pulp particles.
Claim 7
Independent Claim
158 words
A method of constructing a transformer lead insulator comprising the steps of: providing two hollow cylindrical members, a first of said cylindrical members having an inside diameter which is slightly larger than the outside diameter of the second cylindrical member, flaring one end of said hollow cylindrical members, providing a U-shaped channel member having a top portion, cutting a circular opening in the top portion of said U-shaped channel member, said opening having a diameter which is slightly less than the outside diameter of the second cylindrical member, flaring the area adjacent to the circular opening in the channel member, inserting the second cylindrical member into said opening from the inside of the channel member, telescoping the first cylindrical member over the second cylindrical member until the flare area of the first cylindrical member is adjacent to the outside of the flare area around the opening in the channel member, and applying an adhesive between the flared surfaces.
Claim 8
Independent Claim
158 words
A method of constructing a transformer lead insulator comprising the steps of: providing two hollow cylindrical members, a first of said cylindrical members having an inside diameter which is slightly larger than the outside diameter of the second cylindrical member, flaring one end of said hollow cylindrical members, providing a U-shaped channel member having a top portion, cutting a circular opening in the top portion of said U-shaped channel member, said opening having a diameter which is slightly less than the outside diameter of the second cylindrical member, flaring the area adjacent to the circular opening in the channel member, inserting the second cylindrical member into said opening from the inside of the channel member, telescoping the first cylindrical member over the second cylindrical member until the flare area of the first cylindrical member is adjacent to the outside of the flare area around the opening in the channel member, and applying an adhesive between the flared surfaces.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |