US3801725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spacer construction for fluid-insulated transmission lines
Assignee: ABB Inc USA
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Filing: 1972-11-14
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Granted: 1974-04-02
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Expires: 1992-11-14
Abstract
Abstract Improved spacer discs with voltage-control rings are provided to centrally locate the inner high-voltage conductor in fluidinsulated transmission lines. The streamer-control rings reduce the probability of initiation of a streamer across the spacer. Rings, in conjunction with corrugations provided on the surface of the insulating spacers, may additionally be provided for voltage control across the spacers. The spacing between a plurality of voltage-control rings, supported on the spacer, may accommodate the voltage-distribution pattern. The rings may be cast into the spacer as cylinders or cemented thereto, as desired. The rings may be located in somewhat close proximity to both the inner high-voltage conductor, and also to the inner wall of the outer grounded pipe enclosure. Bands of conducting paint, conducting rings of resinous material, such as epoxy, or rings of high-dielectric-constant material may alternatively be employed in place of solid metallic rings.
Inventors
- 👤 O Farish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:07
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/06; H01B9/0644; H01B9/0666; H01B9/0672; H02; H02G; H02G5/00; H02G5/06; H02G5/066
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
42 words
A high-voltage electrical system comprising a plurality of spaced electrodes, a dielectric spacer disposed between said electrodes, and at least one conducting ring disposed on the exposed lateral surface of said spacer and spaced radially away from each of said spaced electrodes.
Claim 2
Dependent Claim
42 words
A high-voltage electrical system comprising a plurality of spaced electrodes, a dielectric spacer disposed between said electrodes, and at least one conducting ring disposed on the exposed lateral surface of said spacer and spaced radially away from each of said spaced electrodes.
Claim 3
Dependent Claim
82 words
The combination of claim 1, wherein two concentric conducting rings are disposed on the exposed lateral surface of said spacer with both of the concentric conducting rings spaced radially away from each of said spaced electrodes. 3, A high-voltage coaxial electrical system comprising a pair of coaxial electrodes, a disc-like spacer of insulating material separating said electrodes, and one or more conducting rings surrounding the central conductor yet spaced radially away therefrom and supported on the lateral exposed surface of said spacer.
Claim 4
Dependent Claim
15 words
The combination of claim 3, wherein two rings are utilized and are in concentric relation.
Claim 5
Dependent Claim
11 words
The combination of claim 1, wherein the dielectric spacers is corrugated.
Claim 6
Dependent Claim
11 words
The combination of claim 3, wherein the dielectric spacer is corrugated.
Claim 7
Dependent Claim
21 words
The combination of claim 1, wherein metallic shielding electrodes are provided peripherally on the inside and outer edges of the spacer.
Claim 8
Dependent Claim
50 words
A high-voltage electrical system comprising a plurality of spaced electrodes, a dielectric spacer disposed between said electrodes, and one or more spaced rings painted upon the exposed outer lateral surface of the dielectric spacer in concentric relationship with respect to said spaced electrodes and spaced radially away from both electrodes.
Claim 9
Dependent Claim
50 words
A high-voltage electrical system comprising a plurality of spaced electrodes, a dielectric spacer disposed between said electrodes, and one or more spaced rings painted upon the exposed outer lateral surface of the dielectric spacer in concentric relationship with respect to said spaced electrodes and spaced radially away from both electrodes.
Claim 10
Dependent Claim
50 words
A high-voltage electrical system comprising a plurality of spaced electrodes, a dielectric spacer of resinous material disposed between said electrodes, and one or more rings made of a conducting epoxy material cast into the exposed lateral side of the dielectric epoxy spacer and spaced radially away from said spaced electrodes.
Claim 11
Dependent Claim
50 words
A high-voltage electrical system comprising a plurality of spaced electrodes, a dielectric spacer of resinous material disposed between said electrodes, and one or more rings made of a conducting epoxy material cast into the exposed lateral side of the dielectric epoxy spacer and spaced radially away from said spaced electrodes.
Claim 12
Dependent Claim
41 words
A high-voltage electrical system comprising a plurality of spaced electrodes, a dielectric spacer disposed between said electrodes, and one or more high-dielectric-constant epoxy bands cast onto the main epoxy spacer, said main epoxy spacer being made of a relatively low-dielectric-constant material.
Claim 13
Dependent Claim
41 words
A high-voltage electrical system comprising a plurality of spaced electrodes, a dielectric spacer disposed between said electrodes, and one or more high-dielectric-constant epoxy bands cast onto the main epoxy spacer, said main epoxy spacer being made of a relatively low-dielectric-constant material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |