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US3784722A Expired / Lapsed US ⏱️ 0.0 years remaining

Water-cooled electric furnace cable

Assignee: Individual
•
Filing: 1972-07-17
•
Granted: 1974-01-08
•
Expires: 1992-07-17
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Abstract

Abstract To prevent wear and cutting of the hair-like wires of the stranded conductor wire ropes of a flexible water-cooled electric furnace conductor cable and its tubular jackets and core by their flexing against the end of the riser tubes in the terminals thereof, the riser tube of each terminal is flexible and is constructed from non-ferrous flexible non-magnetic metal such as phosphor bronze, as a short hose portion or as a short tightlywound coil spring, either of which flexes with the bending of the cable as the furnace is tilted and the cable is consequently stretched while suspended between the furnace and the transformer. The flexible riser tube extends from the cable conductor rope pocket of the terminal head into the interior of the cable so as to prevent the solder used in securing the conductor ropes in the pocket from flowing into the interior of the cable and plugging up the water holes through which the cooling water flows from the terminal end through the riser tube by way of the perforated tubular core into the interior of the cable and into the flexible elastomeric perforated tubular jackets surrounding the cable conductor ropes. The connection between the terminal and the flexible riser tube is made by means of a tubular coupling including a threaded tubular stem or nipple threaded into the inner end of the terminal cooling water bore and carrying a correspondingly internally-threaded annular disc the periphery of which is joined to the inner end of the flexible riser tube by an annular layer of solder. The coupling and disc are of non-magnetic metal such as brass.

Inventors

  • 👤 D Goodman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 21:38
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/11; H01; H01B; H01B7/00; H01B7/42; H01B7/421; H01B7/423; H01B7/425; H01B9/00; H01B9/001

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 184 words
A cable terminal adapted to be inserted in the flexible tubular casing of an electric furnace cable and therein connected to a multiplicity of flexible stranded wire conductor ropes surrounding a central flexible coolant conduit, said terminal comprising; a terminal body having a head portion and an electrical connection portion projecting outward from one end of said head portion, said head portion having a central bore and counterbore facing in the opposite direction from said connection portion, said head portion having a coolant passageway therethrough communicating with said bore, a riser tube of flexible material disposed centrally in said counterbore and defining with said counterbore an annular cavity adapted to receive the outer ends of the conductor ropes and also adapted to receive means for securing the conductor ropes to said head, said riser tube being adapted to be placed in communication with the coolant conduit, and a riser tube coupling device disposed in said bore between said terminal body and said riser tube and secured to the inner end of said riser tube and to said terminal body in interconnecting supporting relationship therewith.
Claim 2
Dependent Claim 184 words
A cable terminal adapted to be inserted in the flexible tubular casing of an electric furnace cable and therein connected to a multiplicity of flexible stranded wire conductor ropes surrounding a central flexible coolant conduit, said terminal comprising; a terminal body having a head portion and an electrical connection portion projecting outward from one end of said head portion, said head portion having a central bore and counterbore facing in the opposite direction from said connection portion, said head portion having a coolant passageway therethrough communicating with said bore, a riser tube of flexible material disposed centrally in said counterbore and defining with said counterbore an annular cavity adapted to receive the outer ends of the conductor ropes and also adapted to receive means for securing the conductor ropes to said head, said riser tube being adapted to be placed in communication with the coolant conduit, and a riser tube coupling device disposed in said bore between said terminal body and said riser tube and secured to the inner end of said riser tube and to said terminal body in interconnecting supporting relationship therewith.
Claim 3
Dependent Claim 29 words
A cable terminal, according to claim 1, wherein said coupling device includes a transversely-extending portion and wherein means is provided for securing said transversely-extending portion to said riser tube.
Claim 4
Dependent Claim 29 words
A cable terminal, according to claim 1, wherein said coupling device at its forward end has a tubular stem connecting said bore to the interior of said riser tube.
Claim 5
Dependent Claim 20 words
A cable terminal, according to claim 3, wherein the forward end of said tubular stem is seated in said bore.
Claim 6
Dependent Claim 37 words
A cable terminal, according to claim 3, wherein the rearward end of said bore is threaded and wherein the forward end of said tubular stem is correspondingly threaded and threadedly engages said rearward enD of said bore.
Claim 7
Dependent Claim 48 words
A cable terminal, according to claim 5, wherein the rearward end of said tubular stem is also threaded, and wherein said coupling device also includes a transversely-extending portion secured to said riser tube and has a threaded hole therein threadedly engaging the threaded rearward end of said stem.
Claim 8
Dependent Claim 26 words
A cable terminal, according to claim 2, wherein said securing means includes an annular layer of metal adherently joining said transversely-extending portion to said riser tube.
Claim 9
Dependent Claim 39 words
A cable terminal, according to claim 1, wherein an elongated flexible tubular connector is interposed between said riser tube and the central flexible coolant conduit and extends beyond said riser tube into the interior of the flexible coolant conduit.
Claim 10
Dependent Claim 18 words
A cable terminal, according to claim 8, wherein said elongated flexible tubular connector comprises a tightly-wound helical spring.

References Cited (Backward Citations)

US2969415A Cited
US2985708A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-01-07 1977-07-09 1978-01-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-01-07 1981-07-09 1982-01-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-01-07 1985-07-09 1986-01-08 $7700.00 Window Closed / Lapsed

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