US1878790A - Electric flexible conductor - Google Patents

Electric flexible conductor Download PDF

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Publication number
US1878790A
US1878790A US324616A US32461628A US1878790A US 1878790 A US1878790 A US 1878790A US 324616 A US324616 A US 324616A US 32461628 A US32461628 A US 32461628A US 1878790 A US1878790 A US 1878790A
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United States
Prior art keywords
flexible
cable
conductor
tube
electric
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Expired - Lifetime
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US324616A
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English (en)
Inventor
Lund Einar
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ELECTRODES de la SAVOIE SOC D
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ELECTRODES de la SAVOIE SOC D
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/001—Power supply cables for the electrodes of electric-welding apparatus or electric-arc furnaces

Definitions

  • M invention relates to an electric flexible con uctor of the type which transmits high tension currents an the action of flame or jets of flame.
  • g T he said flexible conductor is particularly applicable to leading an electric current to the movable electrodes of electrometallurgical furnaces of high power.
  • the flexible parts of the 1g elements leading current to such movable electrodes are composed of copper cables, or of flexible blades of copper, which have the dis advantage of being afle'cted by heat, oxidizing, and when Sub e'cted to annealing, of los- 16, ng their mechanical resistance. Also, in con-- nection with arrangements well known in the 'art, care is taken not to expose such elements to the flames given 011' byopen furnaces, such as calcium carbide or ferro-alloy furnaces for example.
  • Another object of my invention is to combine one or more electric cables with a seamless flexible metallic tube of the type, for example, 0f those tubes which are formed by drawing a single piece of metallic tube, without soldering or clamping.
  • the one or more cables are preferably disposed with a certain amount of play within the flexible metallic tube.
  • I may dispose the metallic tube on the interior of the cable and I may even combine the two arrangements.
  • I provide a circulation of water or other liquid on the interior of the flexible tube with a view to en:
  • the flexible conductor is connected.
  • the conductors thus constructed are both flexible and unaflected by the heat or by the flames issuing from the furnaces or elsewhere. Said conductors can at the same time conduct the cooling water and the electric current to the electrode-carrying devices or analogous members.
  • Fig. 1 is a sectional view' of the first embodiment of my invention
  • Fig. 2 isa sectional view similar to Fig. 1 showing a slightly modified form of mountg:
  • Fig. 3 is an elevational view with parts in section of still another slightly modified form of mounting;
  • Fig. 4c is a partial longitudinal section of another modified form of conductor;
  • F Fig. 5 is a transverse section taken through Figffi is a sectional longitudinal view of a modified form;
  • Fig. 7 is a partial sectional plan view of the same form and Figs. 8 and 9 are similar views of another modified form of mounting.
  • Fig. 1, 1 represents a flexible seamles metallic tube, of any type known to the art, of an alloy 01' of copper, for example, formed of a single piece by drawing without soldering or clamping.
  • said tube is disposed a cable 2 of flexible character for conducting electricity, said cable being of such thickness as to form a space 3 between such cable and the tube for circulating water.
  • the cable 2 is fastened at each extremity within a bronze thimble 4, pierced by a transverse hole 5 and a longitudinal hole 6 for running water out of the tube.
  • Each thimble is fixed by any of the well known means, such as threads, tapered joint, sweating, or the like, to an electric coupling 7 which may be cast or not, for ensuring clamping and perfect contact.
  • Fig. 1 said parts are screwthreaded together.
  • the tube 1 is fixed to a socket 8 connected to a flange 9 of the coupling 7 and sealed by means of a suitable packing ring 10.
  • the couplings 7 can be connected either to the contact plate A with general water circulation surrounding the electrode B of the furnace and forming an electrodecarrying clamp therefor, or to the rigid bars C.
  • the couplings 7 are themselves each pierced with a channel 11 registerin at one end with the hole 6 of the thimble and communicating at the other end with a pipe line D serving as a conduit for carrying water to the electrode-carrying clamp A.
  • the two extremities of the flexible conductor are disposed vertically, and the movable extremity of the conductor can be displaced from the position indicated at ⁇ I in full lines to the position indicated at II in dot and dash lines, an arcuate rest 12, or analogous member serving to support the right hand end of the conductor.
  • Fig. 3 one of the extremities of the flexible conductor is vertically disposed whereas the other is horizontal, the horizontal end being displaceable as before from the position indicated at I to the position indicated at II. In said Fig. 3 only the lower clamping parts of bus bars C are shown.
  • the cable 2 is maintained in spaced relation to the tube 1 by means of members 15 pierced with holes 16 in a manner to assure normal circulation of the water.
  • the said members 15 asvavee may be metallic or of insulating material if it is desired to eliminate the phenomenon known in the electrical art as skin eflect.
  • I may electricall-y insulate the tube 1, at one or both of its extremities, from the cable 2 as well as from the fitting7, in order to thus obtain, not only suppression of skin effect, but also to protect the conductor from jets of flame due to accidental contact.
  • the flexible conductor may be composed of one or more cables bound together in known manner for establishing the conditions desired, and chiefly in order to obtain the de cc of flexibility desired, for ensuring efliclent cooling, and for diminishing skin effect.
  • Figs. Sand 7 show the articulation of the water conveyor D on the conductor, by the intermediary of a knee joint 16 mounted on the fitting 7 to which the line 1 is connected.
  • the electrical current is supplied by flem'ble plates 17, near to the center of the articulation and sheltered from the fire.
  • the plates are fixed on the fitting 7 by bolts and connected to the bars C.
  • a fire-proof flexible electric conductor of the type described comprising a flexible electric cable, a flexible metallic tube surrounding said cable, a fitting tightly fitted to one end of said cable, a packing member interconnecting said fitting and said tube, an aperture in said fitting for injecting water into the space between said tube and said cable, a fitting mounted on the other end of said cable, a packing member interconnecting said fitting and said tube, and an aperture in said last mentioned fitting adapted to pass the water in said space into an element to which said conductor is connected for cooling purposes.
  • a fire-proof flexible electric conductor of the type described comprising a flexible electric cable, a flexible metallic tube surrounding said cable, a fitting firmly attached to one end of said cable and tube and having therethrough a channel adapted to pass water into the space therebetween, means for pivotally connecting said fitting to current-carrying bus-bars, and a fitting at the other end of said cable and tube having therethrough a channel adapted to pass the water in said space into an element to which said conductor is connected for cooling purposes.
  • An electricconductor of the type described comprising a relatively massive substantially solid electric conducting cable an outside flexible metallic tubing surrounding III the conducting cable and aced therefrom to form a water acket direct y surrounding the cable, a meta ic thimble fitted over each end of the conducting cable within the outside tubing and exten ing beyond the end of the tubing, said thimble being provided with a transverse channel or bore be 0nd the end of the cable within the water jac et and a longitudinal channel or bore communicating with the transverse channel and extending to the outer end of the thimble, and means sealing the water jacket near the end of the tubing.
  • An electrical conductor as claimed in claim 3 having an electrical end coupling fitted to the thimble outside the tubing.

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  • Insulated Conductors (AREA)
US324616A 1927-12-17 1928-12-08 Electric flexible conductor Expired - Lifetime US1878790A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR645850T 1927-12-17

Publications (1)

Publication Number Publication Date
US1878790A true US1878790A (en) 1932-09-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
US324616A Expired - Lifetime US1878790A (en) 1927-12-17 1928-12-08 Electric flexible conductor

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Country Link
US (1) US1878790A (enrdf_load_stackoverflow)
BE (1) BE356276A (enrdf_load_stackoverflow)
FR (1) FR645850A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457843A (en) * 1944-09-02 1949-01-04 Ohio Crankshaft Co Flexible conductor for induction heating
US2468805A (en) * 1946-03-08 1949-05-03 Linde Air Prod Co Fluid cooled gas blanketed arcwelding torch
US2489992A (en) * 1946-08-28 1949-11-29 Mallory & Co Inc P R Welding electrode holder
US2975267A (en) * 1957-09-11 1961-03-14 Nottingham & Co Inc J B Air cooled whip and electrode holder for welders
US3406239A (en) * 1965-08-25 1968-10-15 Northwestern Steel & Wire Co Power cable arrangement for electric arc furnaces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457843A (en) * 1944-09-02 1949-01-04 Ohio Crankshaft Co Flexible conductor for induction heating
US2468805A (en) * 1946-03-08 1949-05-03 Linde Air Prod Co Fluid cooled gas blanketed arcwelding torch
US2489992A (en) * 1946-08-28 1949-11-29 Mallory & Co Inc P R Welding electrode holder
US2975267A (en) * 1957-09-11 1961-03-14 Nottingham & Co Inc J B Air cooled whip and electrode holder for welders
US3406239A (en) * 1965-08-25 1968-10-15 Northwestern Steel & Wire Co Power cable arrangement for electric arc furnaces

Also Published As

Publication number Publication date
BE356276A (enrdf_load_stackoverflow)
FR645850A (fr) 1928-11-02

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