Patent US3835240A successfully refreshed from Google Patents.
US3835240A
Expired / Lapsed
US
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Fluid cooled electrical cable
Assignee: Siemens AG
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Filing: 1973-09-20
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Granted: 1974-09-10
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Expires: 1993-09-20
Abstract
Abstract A fluid cooled electrical cable, of the type including an electrical conductor immersed in a low-temperature cooling medium, an inner tube in which the electrical conductor and cooling medium are disposed, a radiation shield disposed about the inner tube, an outer tube concentrically disposed about the inner tube and spaced apart therefrom, and superinsulation disposed about the radiation shield and the inner tube within the outer tube and in which the inner tube is suspended in the outer tube by means of suspension wires attached thereto. The improvement comprises the provision of axially displaceable mounting means, fastened to the radially inner surface of the outer tube and coupled to the suspension wires for restraining the inner tube from circumferential movement about its longitudinal axis with respect to the outer tube. The mounting means is configured as a plurality of spaced apart, elongated, slotted tracks fastened to the inner surface of the outer tube, and a plurality of rollers mounted on at least one transverse axle disposed therein to which the suspension wires are coupled. The assembly permits the axial displacement of the inner tube with respect to the outer tube but restrains circumferential movement of the inner tube.
Inventors
- 👤 G Matthaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:11
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/12; F16L59/08; H; H01; H01B; H01B12/00; H01B12/14; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/885; Y10S505/886
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
147 words
In a fluid cooled electrical cable, of the type including an electrical conductor immersed in a low-temperature cooling medium, an inner tube in which the electrical conductor and cooling medium are disposed, a radiation shield disposed about the inner tube, an outer tube concentrically disposed about the inner tube and radiation shield and superinsulation disposed between the radiation shield and the outer tube, the inner tube being suspended in the outer tube by suspension wires, the improvement comprising, a plurality of displaceable mounting means, fastened circumferentially about the radially inner surface of said outer tube, each one of said plurality of mounting means coupled to at least a corresponding one of said suspension wires, said mounting means being movable axially with respect to said inner and outer tubes, for restraining said inner tube from circumferential movement about the longitudinal axis thereof with respect to said outer tube.
Claim 2
Dependent Claim
147 words
In a fluid cooled electrical cable, of the type including an electrical conductor immersed in a low-temperature cooling medium, an inner tube in which the electrical conductor and cooling medium are disposed, a radiation shield disposed about the inner tube, an outer tube concentrically disposed about the inner tube and radiation shield and superinsulation disposed between the radiation shield and the outer tube, the inner tube being suspended in the outer tube by suspension wires, the improvement comprising, a plurality of displaceable mounting means, fastened circumferentially about the radially inner surface of said outer tube, each one of said plurality of mounting means coupled to at least a corresponding one of said suspension wires, said mounting means being movable axially with respect to said inner and outer tubes, for restraining said inner tube from circumferential movement about the longitudinal axis thereof with respect to said outer tube.
Claim 3
Dependent Claim
45 words
The electrical cable recited in claim 1, wherein said displaceable mounting means comprises elongated track means, fastened to the inner surface of said outer tube and disposed axially with respect thereto, and guide means, coupled to said suspension wires and disposed in said track means.
Claim 4
Dependent Claim
45 words
The electrical cable recited in claim 2, wherein said track means comprises a plurality of spaced-apart elongated U-shaped slotted tracks, and wherein said guide means comprises a plurality of roller members mounted on at least one transverse axle to which said suspension wires are coupled.
Claim 5
Dependent Claim
53 words
The electrical cable recited in claim 3, wherein said guide means comprises a pair of transverse axles on which said roller members are disposed, and a rigid coupling member, coupled to said transverse axles, said suspension wires being coupled to said rigid coupling member for supporting said inner tube in said outer tube.
Claim 6
Dependent Claim
53 words
The electrical cable recited in claim 2, further comprising a tubular radiation shield, concentrically disposed about said inner tube and fastened to said inner surface of said outer tube by a plurality of rigid support members, said track means being mounted and axially disposed on the radially inner surface of said radiation shield.
Claim 7
Dependent Claim
21 words
The electrical cable recited in claim 2, wherein said track means is mounted on the inner surface of said outer tube.
Claim 8
Dependent Claim
29 words
The electrical cable recited in claim 6, further comprising a tubular radiation shield, concentrically disposed about said inner tube and secured in said outer tube by said suspension wires.
Claim 9
Dependent Claim
29 words
The electrical cable recited in claim 6, wherein said radiation shield is tubular in shape and comprises a pair of semi-cylindrical shaped curved members coupled at each end thereof.
Claim 10
Dependent Claim
39 words
The electrical cable recited in claim 2, wherein said superinsulation is disposed between said radiation shield and said outer tube, and wherein said outer surface of said inner tube is coated with a layer of thermal radiation reflective material.
Claim 11
Dependent Claim
26 words
The electrical cable recited in claim 9, wherein the inner surface of said radiation shield is also provided with a layer of thermal radiation reflective material.
Claim 12
Dependent Claim
181 words
In the assembly of a fluid cooled electrical cable of the type including an electrical conductor immersed in a low temperature cooling medium, a rigid inner tube in which the electrical conductor and cooling medium are disposed, a radiation shield disposed about the inner tube, an outer tube concentrically disposed about the inner tube and the radiation shield, and superinsulation disposed between the radiation shield and the outer tube, the inner tube being suspended in the outer tube by means of suspension wires, the method of connecting the inner and outer tubes, comprising the steps of: fastening a plurality of elongated, axially disposed track means configured as slotted tracks, circumferentially to the radially inner surface of said outer tube; fastening axially displaceable guide means configured as movable roller members mounted on at least one transverse axle to the end of the suspension wires; and while interdisposing said inner tube, radiation shield and superinsulation in said outer tube, successively threading said guide means into a corresponding one of said plurality of track means to suspend said inner tube within said outer tube.
Claim 13
Dependent Claim
181 words
In the assembly of a fluid cooled electrical cable of the type including an electrical conductor immersed in a low temperature cooling medium, a rigid inner tube in which the electrical conductor and cooling medium are disposed, a radiation shield disposed about the inner tube, an outer tube concentrically disposed about the inner tube and the radiation shield, and superinsulation disposed between the radiation shield and the outer tube, the inner tube being suspended in the outer tube by means of suspension wires, the method of connecting the inner and outer tubes, comprising the steps of: fastening a plurality of elongated, axially disposed track means configured as slotted tracks, circumferentially to the radially inner surface of said outer tube; fastening axially displaceable guide means configured as movable roller members mounted on at least one transverse axle to the end of the suspension wires; and while interdisposing said inner tube, radiation shield and superinsulation in said outer tube, successively threading said guide means into a corresponding one of said plurality of track means to suspend said inner tube within said outer tube.
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |