Patent US3622682A successfully refreshed from Google Patents.
US3622682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop joint for high-voltage, oil-filled cable
Assignee: Pirelli and C SpA
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Filing: 1970-09-11
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Granted: 1971-11-23
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Expires: 1990-09-11
Abstract
Abstract A stop joint for joining together a pair of high-voltage oilfilled electrical power cables, and comprising a locking mechanism for securing together the ends of the cable conductors and further comprising a rigid insulator which interconnects the conductors where they are joined, to the outer casing of the cables thereby to absorb the mechanical stresses caused by heating and cooling of the conductors. The locking mechanism comprises a pair of circular discs having sleeves fitted to the respective cable conductors and circumferential protuberances about the edge of the periphery of each disc. These protuberances define a circumferential projection when the discs are together. A ring which can be dissembled is provided about the discs and the ring contains an internal groove which accommodates the projection and holds the discs together.
Inventors
- 👤 Vittorio Buroni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:28
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/20; H02G15/24; H02G15/25
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
346 words
A stop joint locking together the ends of electrical conductors of high and very high voltage oil-filled electrical cables so that the conductors are rigidly connected at their ends to a cable casing, said joint having an axis which passes through the centers of the conductor ends and also having a transversal plane of symmetry passing through the center of the joint in a direction perpendicular to the joint axis, said joint comprising: two electrical contact elements specularly shaped with respect to the plane of symmetry of the joint, the contact elements comprising circular discs, having first and second surfaces, said first surfaces being in contact and lying in the plane of symmetry of the joint, and sleeves projecting from the second surfaces along the axis of the joint, said sleeves being rigidly connected to the ends of the conductors, each of said discs having specularly shaped protruberances around its periphery and defining an annular projection along the outer two periphery of the discs; a ring extending along the outer periphery of the discs comprising a plurality of sectors and having adjusting means rigidly securing adjacent sectors to one another, said ring having a groove on its inner surface of the same configuration as the annular projection and receiving said projection intimately inside the groove, said ring securing and rigidly locking said contact elements together by urging together and aligning the two protruberances; two restraining insulators having inner lips on a first end and outer lips on a second end and extending from the vicinity of the contact elements to points adjacent to the casing, means rigidly securing the inner lips on the first ends of said insulators to said electrical contact elements, means rigidly securing the outer lips on the second ends of the insulators to the casing; at least two pairs of electrodes, the electrodes of the first pair being positioned respectively at each end of the conductors and being electrically connected thereto, and the electrodes of the second pair being positioned respectively on each side of the ring and being electrically connected thereto.
Claim 2
Dependent Claim
346 words
A stop joint locking together the ends of electrical conductors of high and very high voltage oil-filled electrical cables so that the conductors are rigidly connected at their ends to a cable casing, said joint having an axis which passes through the centers of the conductor ends and also having a transversal plane of symmetry passing through the center of the joint in a direction perpendicular to the joint axis, said joint comprising: two electrical contact elements specularly shaped with respect to the plane of symmetry of the joint, the contact elements comprising circular discs, having first and second surfaces, said first surfaces being in contact and lying in the plane of symmetry of the joint, and sleeves projecting from the second surfaces along the axis of the joint, said sleeves being rigidly connected to the ends of the conductors, each of said discs having specularly shaped protruberances around its periphery and defining an annular projection along the outer two periphery of the discs; a ring extending along the outer periphery of the discs comprising a plurality of sectors and having adjusting means rigidly securing adjacent sectors to one another, said ring having a groove on its inner surface of the same configuration as the annular projection and receiving said projection intimately inside the groove, said ring securing and rigidly locking said contact elements together by urging together and aligning the two protruberances; two restraining insulators having inner lips on a first end and outer lips on a second end and extending from the vicinity of the contact elements to points adjacent to the casing, means rigidly securing the inner lips on the first ends of said insulators to said electrical contact elements, means rigidly securing the outer lips on the second ends of the insulators to the casing; at least two pairs of electrodes, the electrodes of the first pair being positioned respectively at each end of the conductors and being electrically connected thereto, and the electrodes of the second pair being positioned respectively on each side of the ring and being electrically connected thereto.
Claim 3
Dependent Claim
16 words
A stop joint as defined in claim 1, wherein said ring comprises at least four sectors.
Claim 4
Dependent Claim
27 words
A stop joint as defined in claim 1, wherein the protruberances are frustoconical shaped with their respective bases coplanar with the first surfaces of their reSpective discs.
Claim 5
Dependent Claim
58 words
A stop joint as defined in claim 1, further comprising a layer of metallic tape on the periphery of said ring bridging the two electrodes of the second pair screening said ring and electrical contact area, and a layer of carbon paper disposed over said metallic tape layer providing linearity between the pair of electrodes forming the screen.
Claim 6
Dependent Claim
35 words
A stop joint as defined in claim 1, wherein the two electrodes of the second pair are maintained at the potential of the ring by means of springs interposed between the ring and the electrodes.
Claim 7
Dependent Claim
60 words
A stop joint as defined in claim 1, wherein the restraining insulator consists of two equal parts, specularly disposed with respect to each other, each restraining insulator portion being in contact with said discs and each of the electrodes of the second pair being imbedded in a corresponding restraining insulator and forming the screen for the ring and electrical contacts.
Claim 8
Dependent Claim
57 words
A stop joint as defined in claim 1, wherein a sealing gasket is placed in a groove formed by the combination of the discs, the restraining insulators and a pair of joint flanges, to seal said groove from the permeation of oil and thereby prevent said oil from coming into contact with the conductors of said joint.
Claim 9
Dependent Claim
56 words
A stop joint as in claim 1, wherein the electrodes of the first pair are embedded in insulators, and wherein means mechanically and electrically couple said electrodes of the first pair to the sleeves of the electrical contact elements whereby to impart a voltage potential on the sleeve to the said electrodes of the first pair.
Claim 10
Dependent Claim
17 words
A stop joint as defined in claim 1, wherein the restraining insulator in made of epoxy resin.
Claim 11
Dependent Claim
16 words
A stop joint as defined in claim 1, wherein said restraining insulator is made of porcelain.
Claim 12
Dependent Claim
28 words
A stop joint as defined in claim 1, wherein outer lips of the two restraining insulators are clamped between casing flanges and bushings secured to the casing flanges.
Claim 13
Dependent Claim
35 words
A stop joint as defined in claim 1, wherein inner lips of the two restraining insulators are clamped between the discs and a pair of joint flanges urged against said discs by means of screws.
Claim 14
Dependent Claim
218 words
A stop joint locking together ends of electrical conductors of high and very high voltage oil-filled electrical cables so that the conductors are rigidly connected at their ends to an outer casing covering the cable insulation, said joint having an axis which passes through the centers of the conductor ends and also having a transversal plane of symmetry passing through the center of the joint in a direction perpendicular to the joint axis, said joint comprising: two electrical contact elements, specularly shaped with respect to the plane of symmetry of the joint, the contact elements comprising circular discs, having first and second surfaces, said first surfaces contacting each other in the plane of symmetry of the joint, and sleeves projecting from the second surfaces along the axis of the joint, said sleeves being rigidly connected to the ends of the conductors, conductive means disposed about the peripheries of said discs and mechanically clamping said discs together, a pair of rigid, tubularly shaped, restraining insulators surrounding the cable insulation on each side of the plane of symmetry and extending from the vicinity of the contact elements to points adjacent to the casing, means rigidly securing one end of each insulator to said electrical contact elements and means rigidly securing the other end of each insulator to the cable casing.
Claim 15
Dependent Claim
218 words
A stop joint locking together ends of electrical conductors of high and very high voltage oil-filled electrical cables so that the conductors are rigidly connected at their ends to an outer casing covering the cable insulation, said joint having an axis which passes through the centers of the conductor ends and also having a transversal plane of symmetry passing through the center of the joint in a direction perpendicular to the joint axis, said joint comprising: two electrical contact elements, specularly shaped with respect to the plane of symmetry of the joint, the contact elements comprising circular discs, having first and second surfaces, said first surfaces contacting each other in the plane of symmetry of the joint, and sleeves projecting from the second surfaces along the axis of the joint, said sleeves being rigidly connected to the ends of the conductors, conductive means disposed about the peripheries of said discs and mechanically clamping said discs together, a pair of rigid, tubularly shaped, restraining insulators surrounding the cable insulation on each side of the plane of symmetry and extending from the vicinity of the contact elements to points adjacent to the casing, means rigidly securing one end of each insulator to said electrical contact elements and means rigidly securing the other end of each insulator to the cable casing.
Claim 16
Dependent Claim
61 words
A stop joint as defined in claim 1, which further comprises at least two pairs of electrodes, the electrodes of first pair being positioned respectively at each end of the conductors and being electrically connected thereto, and the electrodes of the second pair being positioned respectively at each side of the means clamping the discs together and being electrically connected thereto.
References Cited (Backward Citations)
US2967901A
Cited
US3061666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |