US3737556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable termination apparatus with rigid stress relief assembly and conductive seal
Assignee: Joslyn Corp
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Filing: 1972-01-21
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Granted: 1973-06-05
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Expires: 1992-01-21
Abstract
Abstract A termination or splice apparatus for use with insulated power cable comprising a rigid housing having an elongated bore for receiving a terminal end portion of the cable, and a conducting elastomeric sealing means at one end of the bore. An integral stress relief assembly includes a preformed cone of rigid conducting material and an insulating section, and is seated in the bore adjacent said sealing means and extends toward the opposite end for a distance substantially less than the total length of the bore. The remaining portion of the bore is filled with dielectric insulating fluid and a load-bearing insulation system that exerts compression through said stress cone and insulating section against said sealing means to provide continuously sealing engagement at said one end of the bore around the cable through a wide range of temperature variations.
Inventors
- 👤 F Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/02; H02G15/06
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
116 words
A cable termination apparatus for insulated power cable having a coaxial outer conductive sheath comprising an elongated housing having a bore receiving a terminal end portion of said cable; annular sealing means of deformable material closing one end of said bore around said cable in an air-free seal; a hollow sleeve of rigid load-bearing material in said bore around said cable, said sleeve including a tubular semi-conductive segment adjacent said sealing means forming a stress cone having a frustoconical surface tapering outwardly of the cable insulation and a tubular insulating segment of dielectric material bonded to said frustoconical surface; and force means exerting compression on said sealing means through said sleeve for maintaining said air-free seal.
Claim 2
Dependent Claim
116 words
A cable termination apparatus for insulated power cable having a coaxial outer conductive sheath comprising an elongated housing having a bore receiving a terminal end portion of said cable; annular sealing means of deformable material closing one end of said bore around said cable in an air-free seal; a hollow sleeve of rigid load-bearing material in said bore around said cable, said sleeve including a tubular semi-conductive segment adjacent said sealing means forming a stress cone having a frustoconical surface tapering outwardly of the cable insulation and a tubular insulating segment of dielectric material bonded to said frustoconical surface; and force means exerting compression on said sealing means through said sleeve for maintaining said air-free seal.
Claim 3
Dependent Claim
33 words
The termination apparatus of claim 1 wherein said sealing means is constructed of conductive material and is in direct contact along an inside radial end face with said conductive segment of said sleeve.
Claim 4
Dependent Claim
31 words
The cable termination apparatus of claim 2 including means sealing said bore at the end opposite said annular sealing means and including insulating fluid in said bore between said sealed ends.
Claim 5
Dependent Claim
29 words
The cable termination apparatus of claim 1 wherein said sealing means is relatively short in dimension axially of said bore in relation to the axial dimension of said sleeve.
Claim 6
Dependent Claim
44 words
The cable termination apparatus of claim 4 wherein said sleeve extends only a fractional part of the axial length of said bore, and a remaining portion of said bore is filled with a load-bearing insulating system exerting force on one end of said sleeve.
Claim 7
Dependent Claim
33 words
The cable termination apparatus of claim 5 wherein said load-bearing insulating system comprises a plurality of rigid annular insulating rings around said cable insulation and insulating fluid in said bore around said cable.
Claim 8
Dependent Claim
35 words
The cable termination apparatus of claim 6 wherein said force means includes spring means exerting resilient end thrust on said sleeve through said insulating rings for maintaining said annular sealing means in an air-free seal.
Claim 9
Dependent Claim
146 words
A cable termination assembly including an insulated, hollow housing having an elongated bore receiving a terminal end portion of an insulated power cable having a coaxial conductive ground sheath; a pair of conductive terminals at opposite ends of said housing connected to said power cable and said sheath, respectively; annular, deformable, conductive sealing means at one end of said housing sealing said bore around said cable and making electrical contact between said sheath and one of said terminals; a hollow sleeve of load-bearing material around said cable in said bore including a conductive segment in contact with said sealing means forming a stress cone with a frustoconical surface tapering outwardly of said cable insulation and an insulating segment in contact with said surface, and bias means exerting force on said sealing means through said sleeve for maintaining said seal at said one end of said bore.
Claim 10
Dependent Claim
146 words
A cable termination assembly including an insulated, hollow housing having an elongated bore receiving a terminal end portion of an insulated power cable having a coaxial conductive ground sheath; a pair of conductive terminals at opposite ends of said housing connected to said power cable and said sheath, respectively; annular, deformable, conductive sealing means at one end of said housing sealing said bore around said cable and making electrical contact between said sheath and one of said terminals; a hollow sleeve of load-bearing material around said cable in said bore including a conductive segment in contact with said sealing means forming a stress cone with a frustoconical surface tapering outwardly of said cable insulation and an insulating segment in contact with said surface, and bias means exerting force on said sealing means through said sleeve for maintaining said seal at said one end of said bore.
Claim 11
Dependent Claim
42 words
The cable termination assembly of claim 8 wherein said bias means includes a plurality of rigid insulating rings around said cable in said bore, one of said rings being in end contact with an end of said insulating segment of said sleeve.
Claim 12
Dependent Claim
32 words
The cable termination assembly of claim 8 wherein said sealing means is substantially shorter in axial length than said sleeve and said sleeve is substantially shorter in axial length than said bore.
Claim 13
Independent Claim
177 words
A device for terminating a high voltage cable comprising an elongated housing having a bore receiving an end portion of said high voltage cable, sealing means positioned at one end of said bore maintaining said end portion of said cable and said housing in a sealing engagement, said sealing means including an annular deformable member, filler means within said bore between said end portion of said cable and said elongated housing, said filler means including a first substantially noncompressible elongated unitary member, said first noncompressible member including a relatively conductive portion adjacent said deformable member, said conductive portion having a first surface exhibiting an increasing taper away from said end portion of said cable with increasing distance from said deformable member, said first noncompressible member further including a relatively nonconductive portion having a second surface complementarily shaped to at least a portion of said first surface, and compressive means biasing said deformable member and said first noncompressible member into a compressive engagement to maintain said sealing engagement between said end portion of said cable and said housing.
Claim 14
Independent Claim
177 words
A device for terminating a high voltage cable comprising an elongated housing having a bore receiving an end portion of said high voltage cable, sealing means positioned at one end of said bore maintaining said end portion of said cable and said housing in a sealing engagement, said sealing means including an annular deformable member, filler means within said bore between said end portion of said cable and said elongated housing, said filler means including a first substantially noncompressible elongated unitary member, said first noncompressible member including a relatively conductive portion adjacent said deformable member, said conductive portion having a first surface exhibiting an increasing taper away from said end portion of said cable with increasing distance from said deformable member, said first noncompressible member further including a relatively nonconductive portion having a second surface complementarily shaped to at least a portion of said first surface, and compressive means biasing said deformable member and said first noncompressible member into a compressive engagement to maintain said sealing engagement between said end portion of said cable and said housing.
Claim 15
Dependent Claim
28 words
A device as defined in claim 11 wherein said filler means comprises a dielectric system, said dielectric system including a liquid dielectric portion and a solid dielectric portion.
Claim 16
Dependent Claim
24 words
A device as defined in claim 12 wherein said relatively nonconductive portion of first noncompressible member forms a part of said solid dielectric portion.
Claim 17
Dependent Claim
39 words
A device as defined in claim 12 wherein said solid dielectric portion includes a plurality of substantially noncompressible elongated unitary dielectric members serially positioned within said bore between one end of said bore and said first noncompressible elongated member.
Claim 18
Dependent Claim
40 words
A device as defined in claim 12 wherein said liquid dielectric portion is positioned between said solid dielectric portion and said end portion of said cable and between said solid dielectric portion and the inner surface of said elongated housing.
Claim 19
Dependent Claim
19 words
A device as defined in claim 11 wherein said annular deformable member comprises an annular deformable electrically conductive member.
Claim 20
Independent Claim
80 words
A device for terminating an insulated high voltage power cable comprising an elongated housing of insulating material having a bore receiving an end portion of said insulated high voltage power cable, annular deformable sealing means maintaining said housing and said end portion of said cable in a sealing engagement and, conductive means for providing voltage stress relief for the insulation of said high voltage cable, said conductive means positioned within said bore in a compressive relationship with said sealing means.
Claim 21
Independent Claim
80 words
A device for terminating an insulated high voltage power cable comprising an elongated housing of insulating material having a bore receiving an end portion of said insulated high voltage power cable, annular deformable sealing means maintaining said housing and said end portion of said cable in a sealing engagement and, conductive means for providing voltage stress relief for the insulation of said high voltage cable, said conductive means positioned within said bore in a compressive relationship with said sealing means.
Claim 22
Dependent Claim
17 words
A device as recited in claim 17 wherein said sealing means is formed of a conductive material.
Claim 23
Independent Claim
107 words
A device for terminating an insulated high voltage power cable of the type having a central current carrying conductor and an outer conductive sheath connected to a source of ground potential comprising an elongated housing of insulating material having a bore receiving an end portion of said insulated high voltage power cablE, an electrically conductive annular deformable sealing means maintaining said housing and said end portion of said cable in a sealing engagement and conductive means for providing voltage stress relief for the insulation of said high voltage cable, said conductive means positioned within said bore and electrically connected to said conductive sheath by said sealing means.
Claim 24
Independent Claim
107 words
A device for terminating an insulated high voltage power cable of the type having a central current carrying conductor and an outer conductive sheath connected to a source of ground potential comprising an elongated housing of insulating material having a bore receiving an end portion of said insulated high voltage power cablE, an electrically conductive annular deformable sealing means maintaining said housing and said end portion of said cable in a sealing engagement and conductive means for providing voltage stress relief for the insulation of said high voltage cable, said conductive means positioned within said bore and electrically connected to said conductive sheath by said sealing means.
Claim 25
Dependent Claim
18 words
A device as defined in claim 19 wherein said conductive means is formed of a substantially rigid material.
Claim 26
Dependent Claim
23 words
A device as defined in claim 20 further comprising compressive means maintaining said conductive means and said sealing means in a compressive engagement.
Claim 27
Independent Claim
265 words
A device for terminating an insulated high voltage power cable comprising an elongated housing of insulating material having a bore receiving an end portion of said insulated high voltage power cable, a deformable sealing means positioned at one end of said bore maintaining said end portion of said cable and said housing in a sealing engagement, a substantially noncompressible elongated unitary member in said bore around said end portion of said cable, said noncompressible member having an inner diameter at least along a portion of the inner surface of said noncompressible member greater than the outer diameter of said end portion of said cable to produce a first substantial clearance between said portion of said inner surface of said noncompressible member and said end portion of said cable and having an outer diameter less than the inner diameter of said housing to produce a second substantial clearance between said noncompressible member and said housing, said noncompressible member including a conductive voltage stress relief means for the insulation of said high voltage cable, said conductive stress relief means including a surface exhibiting an increasing taper away from said end portion of said cable with increasing distance from said sealing means, said noncompressible member further including an insulating portion having a surface mating with at least a portion of said surface of said conductive stress relief means and dielectric means within said housing between said end portion of said cable and said housing, at least a portion of said dielectric means comprising a liquid dielectric, said first and said second clearances being filled by said liquid dielectric.
Claim 28
Independent Claim
265 words
A device for terminating an insulated high voltage power cable comprising an elongated housing of insulating material having a bore receiving an end portion of said insulated high voltage power cable, a deformable sealing means positioned at one end of said bore maintaining said end portion of said cable and said housing in a sealing engagement, a substantially noncompressible elongated unitary member in said bore around said end portion of said cable, said noncompressible member having an inner diameter at least along a portion of the inner surface of said noncompressible member greater than the outer diameter of said end portion of said cable to produce a first substantial clearance between said portion of said inner surface of said noncompressible member and said end portion of said cable and having an outer diameter less than the inner diameter of said housing to produce a second substantial clearance between said noncompressible member and said housing, said noncompressible member including a conductive voltage stress relief means for the insulation of said high voltage cable, said conductive stress relief means including a surface exhibiting an increasing taper away from said end portion of said cable with increasing distance from said sealing means, said noncompressible member further including an insulating portion having a surface mating with at least a portion of said surface of said conductive stress relief means and dielectric means within said housing between said end portion of said cable and said housing, at least a portion of said dielectric means comprising a liquid dielectric, said first and said second clearances being filled by said liquid dielectric.
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |