Patent US3864507A successfully refreshed from Google Patents.
US3864507A
Expired / Lapsed
US
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Electrical conductor
Assignee: Alcoa Corp
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Filing: 1974-02-25
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Granted: 1975-02-04
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Expires: 1994-02-25
Abstract
Abstract An electrical conductor assembly particularly adapted for underground transmission of high voltage direct current is provided which includes a hollow, cylindrical metal sheath made of elongate staves having tongue and groove engagement between the longitudinal edges of adjacent staves and welded together exteriorly of such tongue and groove engagements and having a groove in the bottom of the sheath in the interior surface thereof to collect particles of foreign matter in the sheath. The conductor further includes a solid cylindrical conductor core of metal such as an aluminum conductor alloy concentrically supported in the sheath by a plurality of insulators at spaced intervals along the length of the conductor and has a compressed gas in the sheath for insulating the aluminum core from the sheath.
Inventors
- 👤 D Marshall Fox
- 👤 Richard B Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:12
CPC Classifications
H; H02; H02G; H02G5/00; H02G5/06; H02G5/066; H02G5/063; H02G5/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
171 words
A conductor assembly for transmission of high voltage electrical power comprising a hollow cylindrical metal sheath, a core conductor, a plurality of insulators in the sheath at spaced intervals along the length thereof supporting the core substantially concentrically centered in the sheath, and compressed insulating gas in the sheath, said sheath comprising one or more elongate staves each of which comprises A portion of the circumference of the sheath and having a groove along one longitudinal edge thereof open toward the adjoining edge of the adjacent stave and a tongue along the other longitudinal edge projecting into the groove in the adjoining edge of the adjacent stave and the staves welded together along their adjacent longitudinal edges exteriorly of said tongue and groove engagement so that welding will not contaminate the interior of the sheath, and further having a particle trap in the interior surface of said sheath comprising a longitudinally extending upwardly open groove in the bottom of the sheath as disposed for use in the transmission of electrical power.
Claim 2
Dependent Claim
171 words
A conductor assembly for transmission of high voltage electrical power comprising a hollow cylindrical metal sheath, a core conductor, a plurality of insulators in the sheath at spaced intervals along the length thereof supporting the core substantially concentrically centered in the sheath, and compressed insulating gas in the sheath, said sheath comprising one or more elongate staves each of which comprises A portion of the circumference of the sheath and having a groove along one longitudinal edge thereof open toward the adjoining edge of the adjacent stave and a tongue along the other longitudinal edge projecting into the groove in the adjoining edge of the adjacent stave and the staves welded together along their adjacent longitudinal edges exteriorly of said tongue and groove engagement so that welding will not contaminate the interior of the sheath, and further having a particle trap in the interior surface of said sheath comprising a longitudinally extending upwardly open groove in the bottom of the sheath as disposed for use in the transmission of electrical power.
Claim 3
Dependent Claim
34 words
A conductor as set forth in claim 1 in which said upwardly open groove has a trapezoidal cross section with the mouth of the groove being substantially narrower than the bottom of the groove.
Claim 4
Dependent Claim
25 words
A conductor as set forth in claim 2 in which said groove has an adhesive in it to catch and trap particles in the groove.
Claim 5
Dependent Claim
23 words
A conductor as set forth in claim 2 in which said groove is formed by adjacent longitudinally extending edge surfaces of adjoining staves.
Claim 6
Dependent Claim
35 words
A conductor as set forth in claim 1 in which two staves for the circumference of a section of said sheath and a plurality of such sections are joined end-to-end to form a transmission line.
Claim 7
Dependent Claim
29 words
A conductor as set forth in claim 1 in which said core conductor is a solid cylinder made of aluminum conductor alloy and has a dielectric coating on it.
Claim 8
Dependent Claim
23 words
A conductor as set forth in claim 1 in which said insulators are spaced apart at intervals of approximately 10 to 20 feet.
Claim 9
Dependent Claim
17 words
A conductor as set forth in claim 1 in which said compressed gas includes sulfur hexafluoride (SF6).
Claim 10
Dependent Claim
31 words
A conductor as set forth in claim 1, in which the longitudinal electrical conductance of the sheath is in the range of one to one-fifth of conductance of said core conductor.
References Cited (Backward Citations)
US755436A
Cited
US3324272A
Cited
US3345450A
Cited
US3515939A
Cited
US3792188A
Cited
US3767837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |