Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2060913 A
Publication typeGrant
Publication dateNov 17, 1936
Filing dateJul 7, 1934
Priority dateJul 7, 1934
Publication numberUS 2060913 A, US 2060913A, US-A-2060913, US2060913 A, US2060913A
InventorsWeaver Leo L
Original AssigneeWestern Electric Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electrical conductor
US 2060913 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

NOV. 17, 1936. l WEAVER 2,060,913

ELECTRICAL CONDUCTOR Filed July 7, 1934 F/G. 4. A F16.

/NVENOR L. 1 WEAVER ATTORNEY Patented Nov. 17, 1936 PATENT OFFICE ELECTRICAL CONDUCTOR Leo L. Weaver, Cranford, N. J., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of NewYork Application July 7, 1934, Serial N0. 734,082

1 Claim.

This invention relates to electrical conductors and more particularly to` multiple conductor cords or cables.

The cords used to connectr a telephone receiver to the base of the instrument and the base to the bell box must be of sutlicient length and exibility, especially in the case of a desk telephone to permit of convenient use over a relatively wide area. At the same time in some cases it is preferable that these cords should not be in the way when the instrument is not in use. Similar considerations apply to the power cords used to supply current to lamps, fiat irons, toasters and other electrical devices. Many devices in the Iorm of variously coiled and shaped spring wires to be applied to or over such cords have been suggested.

An object of the invention is to provide a self coiling cord or conductor which is so constructed as to form itself into a neat and compact coil when not under tension without the application thereto of any extraneousl means or device not normally included in the structure of such conductors or cords, and which shall nevertheless yield easily to tension tending to elongate the coil. In one embodiment of the invention, one or lmore of the three metallic conductor strands of the customary telephone cord is made of some material such as a phosphor bronze alloy, which combines both satisfactorily high `electrical conductivity and mechanical elasticity, and is formed as a flattened tape wound in a resilient helix or Fig. 1 is a plan view of a length of three con-A ductor cord constructed and formed in accord- 50 ance with the invention;

Fig. 2 is a view thereof in side elevation; Fig. 3 is an enlarged sectional View on the line '3f-3' of Fig. 2; Fig. 4 is a view similar to Fig. 1 of a modified 55 form; f

rection of its coil axis and tends to resume its Fig. 5 is a view similar to Fig. 2 of another modified form; I

Fig. 6 is lan enlarged sectional view on the line 6-6 of Fig. 5, and

Fig. "I is an enlarged sectional view of a third modication.

The embodiment of theinvention disclosed in Figs. 1, 2, and 3 comprises three conductors 20, 2|, and 22. These are flat tapes of rectangular cross section coiled in a resilient cylindrical helix whose curvature is substantially in the plane of the tapes. The tapes are made preferably of a phosphor bronze alloy or other material having both satisfactory electrical conductivity and4 mechanical elasticity.

The middle tape 2| is individually covered with a braided protective and insulating sheath 23 of textile libres, and the three tapes together are covered with a similar outer sheath 24.

Instead of coiling the cord in a helix as shown in Fig. 2, it may in some cases be preferable to coil it as a fiat resilient spiral as shown in Fig. 4. In either case the coiled form is held and sustained by the coiled ilat conductors and not by any added member.

Figs. 5 and 6 discloses a modiiied form of the invention in which there is only one conductor in the cord and in which the cross sectionl of the conductor is elliptical or oval and is formed into al helix with the principal curvature in the plane of the greatest cross section-dimension of the conductor.

A cord or cable made and formed in accordance Awith the invention may have any number oi conductors associated together provided that one of the conductors be elastic and have a cross section of greater dimension in one of two mutually perpendicular directions than in the other, so that if the cord beformed-as a coil with its curvature in the plane of the greater cross section dimension of the attened conductor, it will flex easily across that plane but will resist flexure in the plane.

'Ihus Fig. 7 is a cross section of a cord embodying the invention in which a single flat tape conductor 2| is combined with two ordinary round or stranded conductors |20 and |22 and the whole may be coiled in a resilient spiral or helix with the curvature in the plane of the tape 2|.

One advantage of the construction disclosed in Figs. l, 2, and 3 is the saving in covering material. The fiat tape-like conductors enclosed in the sheath 24 are held thereby against relative lateral displacement, and in particular conductors 20 and 22 cannot slide around conductor 2l and make contact with each other.

Hence for mutual insulative separation of the three conductors it is necessary only to cover the middle conductor 2| individually, whereas ii all three were circular in cross section, no one could be relied upon to separate the other two. The same is true of the construction shown in Fig. 7.

In the disclosure above it is suggested that the conductive strands 20, 2|, and 22 be made of phosphor bronze. This is a preferred c0nstruction since such alloys are at the same time highly electrically conductive and also highly mechani cally elastic. The invention is not, however, coniined to this material as in some instances other materials such as spring brass, some spring steels, certain nickel alloys such as monel, nichrome and the like, and for some uses hard drawn alloys of aluminum could be used.

For simplicity and clarity of statement the phrase substantially ilat" as applied to the cross section of a conductor will hereinafter be used to mean a cross section greater in one direction than in any other. and thus will include oval, elliptical, rectangular but not square, rhombic or rhomboidal cross sections and the like. Also the phrases coiled in the plane of the conductor" or coiled in the plane of the strand" will be similarly used to mean coiled so that the curvature of coiling. is substantially `in or wallel to a plane passing through the conductor or strand in the direction of the greatest dimension of the cross section of the conductor or strand.

'I'he embodiments of the invention herein disclosed' are illustrative merely and may be modiiled and departed from in many ways without departing from the spirit and scope o! the invention as pointed out in and limited solely by the appended claim.

What isclaimed is:

An electrical conductor cord comprising three strands each a unitary combined conductor and coiling spring and each of material both` electrically conductive and mechanically elastic and each formed with a substantially flat cross section and the three cross sections being mutually parallel, a sheath of insulating material on the middle strand, and a sheath of insulating material over the whole, the whole conductor cord being coiled in the plane oi' the ilat strands, whereby the coiled conductor is easily elastically deformable under stress along the axis of the coils thereof and tends to return to its coiled :form when released from stress.

LEO L. WEAVER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2890264 *Dec 21, 1956Jun 9, 1959Hoover CoElectrically conductive extensible hose
US2895001 *Jul 5, 1955Jul 14, 1959Dayton Rubber CompanyCombination hose and electrical conductors
US2911947 *Dec 3, 1956Nov 10, 1959Nelson H KramerAnimal leash
US2936670 *Dec 14, 1954May 17, 1960Erwin WalterMethod of manufacturing multi-core cables
US3027417 *Jun 29, 1959Mar 27, 1962Hughes Aircraft CoExtensible electric cable
US3334176 *Jul 22, 1965Aug 1, 1967Sunbeam CorpRetractile cord
US3676572 *Jun 1, 1971Jul 11, 1972Barber Colman CoExtensible cable structure
US6218622 *Oct 10, 1997Apr 17, 2001Tunewell Technology LtdPower distribution line
US6320133Oct 10, 1997Nov 20, 2001Tunewell Technology LtdPower distribution system
US6653570Nov 28, 2001Nov 25, 2003David L. ElrodRibbon cable
US7304246 *Feb 13, 2006Dec 4, 2007Grover Scott HuffmanDesign for linear broadband low frequency cable
US7931582Feb 9, 2001Apr 26, 2011Obtech Medical AgControlled impotence treatment
US8096938Oct 16, 2002Jan 17, 2012Obtech Medical AgControlled anal incontinence disease treatment
US8096939Nov 19, 2009Jan 17, 2012Obtech Medical AgUrinary incontinence treatment with wireless energy supply
US8126558May 22, 2006Feb 28, 2012Obtech Medical AgControlled penile prosthesis
US8287444Apr 29, 2008Oct 16, 2012Obtech Medical AgMechanical impotence treatment apparatus
US8290594Aug 19, 2010Oct 16, 2012Obtech Medical AgImpotence treatment apparatus with energy transforming means
US8313423May 10, 2007Nov 20, 2012Peter ForsellHydraulic anal incontinence treatment
US8509894Oct 12, 2009Aug 13, 2013Milux Holding SaHeart help device, system, and method
US8545384Feb 1, 2010Oct 1, 2013Obtech Medical AgAnal incontinence disease treatment with controlled wireless energy supply
US8556796Jan 15, 2010Oct 15, 2013Obtech Medical AgControlled urinary incontinence treatment
US8600510Oct 9, 2009Dec 3, 2013Milux Holding SaApparatus, system and operation method for the treatment of female sexual dysfunction
US8602966Apr 25, 2008Dec 10, 2013Obtech Medical, AGMechanical impotence treatment apparatus
US8636809Jan 29, 2009Jan 28, 2014Milux Holding SaDevice for treating obesity
US8678997Mar 14, 2006Mar 25, 2014Obtech Medical AgMale impotence prosthesis apparatus with wireless energy supply
US8696745Oct 12, 2009Apr 15, 2014Kirk Promotion Ltd.Heart help device, system, and method
US8734318Jun 28, 2006May 27, 2014Obtech Medical AgMechanical anal incontinence
US8764627Sep 10, 2008Jul 1, 2014Obtech Medical AgPenile prosthesis
EP0113479A1 *Dec 23, 1983Jul 18, 1984Braun AktiengesellschaftMains cable for small electrical devices
WO2009024548A1 *Aug 18, 2008Feb 26, 2009Philip Kelvin CrispAnimal collar
Classifications
U.S. Classification174/69, 267/180, 174/117.00F, 174/117.0FF
International ClassificationH01B7/06
Cooperative ClassificationH01B7/06
European ClassificationH01B7/06