US3869561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable separating joint
Assignee: International Standard Electric Corp
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Filing: 1973-08-27
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Granted: 1975-03-04
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Expires: 1993-08-27
Abstract
Abstract An oil filled cable is divided into separate hydraulic chambers by a stop joint to prevent excess leakage from cable portions adjacent a fault. A separating flange between sections has tight fitting passageways for the insulated wire conductors to permit slight flow between chambers and prevent large leaks. Normally the joint is bypassed by external valves which apply equalized oil pressure to each section. Occurrence of low pressure from a leak causes the valves to close and separates the sections while limiting leakage from the adjacent section until the faulty section is repaired. The construction permits a reduction in the usual number of completely separate stop joints which require additional electrical joint connections.
Inventors
- 👤 Gunnar Wettre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:40
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/20; H02G15/24; H02G15/25
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
123 words
A separating joint for an oil filled electrical cable comprising a plurality of insulated conductors, first and second adjacent cable enclosures around said conductors, said enclosures having adjacent facing end flanges, and a common separating flange secured to and between said facing end flanges of said enclosures, said common separating flange providing two hydraulic chambers for oil on respective opposite sides thereof separated only by said common separating flange, said separating flange having a plurality of openings passing said insulated conductors between said two hydraulic chambers, said insulated conductors fitting sufficiently closely in said openings to allow only a small flow of oil from one side of the separating flange to the other upon occurrence of a pressure difference between the two sides.
Claim 2
Dependent Claim
123 words
A separating joint for an oil filled electrical cable comprising a plurality of insulated conductors, first and second adjacent cable enclosures around said conductors, said enclosures having adjacent facing end flanges, and a common separating flange secured to and between said facing end flanges of said enclosures, said common separating flange providing two hydraulic chambers for oil on respective opposite sides thereof separated only by said common separating flange, said separating flange having a plurality of openings passing said insulated conductors between said two hydraulic chambers, said insulated conductors fitting sufficiently closely in said openings to allow only a small flow of oil from one side of the separating flange to the other upon occurrence of a pressure difference between the two sides.
Claim 3
Dependent Claim
20 words
The device of claim 1, including reinforcing means fitting within said openings receiving said insulated conductors in a close fit.
Claim 4
Dependent Claim
27 words
The device of claim 2, wherein said reinforcing means includes sections of pipe having an inner diameter substantially equal to the outer diameter of said insulated conductors.
Claim 5
Dependent Claim
33 words
The device of claim 3, wherein said separating flange and pipe sections are of metal and including heat fusible metal sealing means securing said pipe sections to said separating flange around said openings.
Claim 6
Dependent Claim
17 words
The device of claim 3, wherein said pipe sections are an integral unit with said separating flange.
Claim 7
Dependent Claim
17 words
The device of claim 3, wherein said pipe sections and separating flange are of an insulating material.
Claim 8
Dependent Claim
16 words
The device of claim 3, wherein said pipe sections and flange are of a conducting material.
Claim 9
Dependent Claim
44 words
The device of claim 3, including tape windings covering said insulated conductors at the entrance points of said pipe sections and providing sufficiently tight connections between said pipe sections and said insulated conductors to allow only said small flow of oil through said openings.
Claim 10
Dependent Claim
45 words
The device of claim 3, including shrinkable plastic sleeves covering said insulated conductors at the entrance points of said pipe sections and providing sufficiently tight connections between said pipe sections and said insulated conductors to allow only said small flow of oil through said openings.
Claim 11
Dependent Claim
37 words
The device of claim 3, including plastic setting material sealing said insulated conductors to said entrance points of said pipe sections and providing sufficiently tight connections to allow only said small flow of oil through said openings.
Claim 12
Dependent Claim
17 words
The device of claim 3, wherein said enclosures on opposite sides of said flange include oil nipples.
Claim 13
Dependent Claim
35 words
The device of claim 2, including means supplying oil to said two hydraulic chambers, means sensing said pressure difference between said two sides, and valve means for controlling the oil supplied between said two chambers.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |