Patent CA589819A successfully refreshed from Google Patents.
US4018977A
Expired / Lapsed
US
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High voltage cable with air dielectric
Assignee: TE Connectivity Corp
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Filing: 1976-07-02
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Granted: 1977-04-19
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Expires: 1996-07-02
Abstract
Abstract The present invention relates to a high voltage cable having a composite dielectric of solid insulation surrounded by an air dielectric. Spacers extend from the solid dielectric and through the air dielectric to maintain a dust cover in radially spaced relationship from the solid insulation and to define the air dielectric diameter.
Inventors
- 👤 Henry Otto Herrmann, Jr.
- 👤 Douglas Wade Glover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:23
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/02; H01B7/0233
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
A high voltage cable, comprising: a center conductor, a layer of solid insulation encircling said conductor, a cover of air permeable flexible material enclosing said layer of solid insulation, said cover being impervious to dust particles and defining a dust free unpressurized air space around said solid insulation, and spacer means between said solid insulation and said cover defining the outer radial extent of said air space.
Claim 2
Dependent Claim
67 words
A high voltage cable, comprising: a center conductor, a layer of solid insulation encircling said conductor, a cover of air permeable flexible material enclosing said layer of solid insulation, said cover being impervious to dust particles and defining a dust free unpressurized air space around said solid insulation, and spacer means between said solid insulation and said cover defining the outer radial extent of said air space.
Claim 3
Dependent Claim
16 words
The structure as recited in claim 1, wherein, said cover comprises a cloth of polyester material.
Claim 4
Dependent Claim
22 words
The structure as recited in claim 1, wherein, said spacer means comprises a material having a dielectric constant approximating that of air.
Claim 5
Dependent Claim
25 words
The structure as recited in claim 1, wherein, said spacer means comprises a series of flanges of a solid dielectric material approximating that of air.
Claim 6
Dependent Claim
12 words
The structure as recited in claim 4, wherein, said flanges are annular.
Claim 7
Dependent Claim
22 words
The structure as recited in claim 4, wherein, said flanges are helical and are serially joined to provide a continuous helical flange.
Claim 8
Dependent Claim
45 words
The structure as recited in claim 4, wherein, said spacer means comprises a bellows having a series of convolutions, with the inner diameters of said convolutions impinging in encirclement against said solid insulation, and with the outer diameters of said convolutions impinging against said cover.
Claim 9
Dependent Claim
19 words
The structure as recited in claim 7, wherein, the outer diameters of said convolutions are bonded to said cover.
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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |