US3608710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage cable system with factory installed potheads and method of installing same
Assignee: Individual
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Filing: 1968-11-20
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Granted: 1971-09-28
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Expires: 1988-11-20
Abstract
Abstract The high-voltage cable system and its preattached potheads facilitate installation of cable in underground work. The method of installation using the improved cable package of this invention permits rapid installation without the necessity of expensive field splicing of the cable to the pothead. Pressure accumulators located within the potheads maintain a positive pressure in the cable system to avoid contamination of the insulating oil. A unique oil submerged, ultrashort pothead and automatic oil purifier form another feature of the system.
Inventors
- 👤 Paul F Pugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:10
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/02; B65D85/04; H; H01; H01B; H01B17/00; H01B17/34; H01F; H01F27/00; H01F27/08; H01F27/10; H01F27/12; H01F27/14; H02; H02G; H02G1/00; H02G1/06; H02G15/00; H02G15/20; H02G15/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
29 words
A method according to claim 1 wherein said sheath is of aluminum; and said step of connecting said sheath to said pothead includes welding the sheath to the pothead.
Claim 2
Dependent Claim
65 words
A method according to claim 1 which further includes connecting a second pothead having a chamber to the other end of said cable before transporting the cable and potheads to the installation site; said step of connecting including sealing said sheath to said second pothead with said chamber of said second pothead communicating with the space between the sheath and conductive core of the cable.
Claim 3
Dependent Claim
31 words
A method according to claim 1 wherein said step of introducing fluid under pressure to said chamber and communicating spaces includes filling said chamber and spaces with a purified insulating oil.
Claim 4
Dependent Claim
29 words
A method according to claim 1 which further includes providing a container; coiling said cable in said container before connecting said pothead to the cable; and closing said container.
Claim 5
Dependent Claim
35 words
A method according to claim 5 wherein said step of installing the cable includes connecting a shield to said pothead, and guiding said shield and pothead under obstructions in a trench to install said cable.
Claim 6
Dependent Claim
135 words
A package for high-voltage cable comprising a generally rectangular boxlike structure having sidewalls, a bottom wall, and a cover; a drum of cylindrical exterior configuration within said container; means releasably securing said drum within said container in centered relation to said sidewalls; first partition means and second partition means; means securing said first partition means in spaced relation to said bottom wall to define a first compartment; means securing said second partition means in spaced relation to said cover to define a second compartment; and a length of high-voltage cable having a sheath surrounding a conductive core, coiled on said drum; a first pothead secured to one end of said cable, and disposed in said first compartment; and a second pothead secured to the other end of said cable and disposed in said second compartment.
Claim 7
Dependent Claim
86 words
A package according to claim 7 wherein said cover includes a first section, and a second section; means releasably connecting said sections together to form a cover including a base portion, and a longitudinally split nozzle portion; and means releasably securing said cover to said end walls in a first position in which said nozzle extends into said container, and a second position in which said nozzle projects from said container; said nozzle presenting a smoothly curved interior surface to guide said cable through the nozzle.
Claim 8
Dependent Claim
32 words
A package according to claim 7 which further includes means releasably securing said bottom wall to said sidewalls; said bottom wall having an opening therein of a size to receive said cable.
Claim 9
Independent Claim
242 words
A method for making factory installed potheads and of installing high-voltage cable comprising the steps of providing a container having a removable cover, a removable bottom wall, and a removable top wall; coiling a length of cable comprising a conductive core and a sheath surrounding the core into said container, said sheath and core having a space therebetween; providing a first pothead and a second pothead, at least one of said potheads having a chamber therein; securing said potheads to the respective ends of said cable with said chamber in fluid communication with said space between said core and sheath; introducing fluid under pressure into said chamber and space between said core and sheath; positioning said potheads within said container; transporting said container with cable and potheads to the installation site; forming a first length of trench for said cable; connecting a shield to said pothead; pulling said first pothead under any obstructions in said trench; uncoiling at least a portion of said cable during said pulling; providing a second container at a location beyond the obstructions; positioning said first pothead in said second container; uncoiling the remaining cable from said first container and coiling at least a portion thereof in said second container; forming a second length of trench for said cable; pulling said first pothead under any obstructions in said second length of trench; and feeding cable from said second container during pulling of the pothead through said second trench.
Claim 10
Dependent Claim
34 words
A method according to claim 10 wherein said step of positioning said potheads within said container includes positioning said first pothead adjacent said top wall, and positioning said second pothead adjacent said bottom wall.
Claim 11
Dependent Claim
74 words
A method according to claim 11 wherein said first pothead is removed from said container after said cover is removed; and which further includes removing said bottom wall; removing said second pothead from said container; pulling said second pothead into position in said trench by pulling same in a direction opposite to the pulling direction of said first pothead; and removing one sidewall of said first container after the cable therein is substantially uncoiled.
Claim 12
Dependent Claim
19 words
A method according to claim 12 wherein said container is positioned with one sidewall horizontal during said pulling operation.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |