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Publication numberUS723717 A
Publication typeGrant
Publication dateMar 24, 1903
Filing dateAug 17, 1900
Priority dateAug 17, 1900
Publication numberUS 723717 A, US 723717A, US-A-723717, US723717 A, US723717A
InventorsJohn D Nicholson
Original AssigneePittsburgh Reduction Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric conductor.
US 723717 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 723,717. PATENTED MAR. 24, 1903.

J. D. NICHOLSON.

ELECTRIC CONDUCTOR.

APPLICATION FILED AUG.17. 1900. no MonnL.

WITNESSES: 48 izkaah INVENTOR 444/47 BY ATTO R N EY UNITED STATES 'ATENT FFICE.

JOHN D. NICHOLSON, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE PITTSBURGH REDUCTION COMPANY, OF- PITTSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA. I

ELECTRIC CONDUCTOR.

SPECIFICATION forming part of Letters Patent N 0. 723,717, dated March 24, 1903.

Application filed August 11,1900. Serial to. 27,196. (Noniodeli) To all whom it may concern: Be it known that I, JOHN D. NICHOLSON, a citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Electrical Conductors, of which the following is a specification.

r This invention relates to a novel electrical re, conductor or wire; and it consists in a wire drawn or rolled from a compound ingotmade of two metals, one being copper and the other aluminium, substantially as hereinafter fully described and claimed.

r 5 In the drawing which forms partof this specification the figure is a transverse section of my compound wire.

Some of the more pertinent physical characteristics of aluminium and copper are as :0 follows:

The two metals readily-fuse together to form alloys of more orless value in the mechanical arts; but the important electric characteristics then no longer exist. The electric conductivity, for example, diminishes rapidly with the addition of copper, while the tensile strength may increase greatly.

I have found that a wire can be readily drawn from a compound ingot composed of Q the two metals poured or formed'se'parately,

' 'in some cases the core being of copper and the shell of aluminium, in other cases thereverse.

'45 In such a wire each metal preserves its own characteristics and both metals partake in the increase of tensile strength due to the operation of drawing. The conductivity of either remains intact. Byduly proportioning the two metals the resultant strength, conductiv- 5'0 ity, sectional area, or weight may be brought to any desired standard.

I prefer to make the compound wire with a. copper core and aluminium shell on account of the greatly-reduced liability to corrosion. In coupling such wires or making branch connections the difiiculty ordinarily found in soldering aluminium is not serious, as the copper part of the conductor can be readily soldered without seriously raising the resistance 6:: of the joint.

The particular method of forming the com pound ingot may vary, as that is not of the essence of my present invention. A simple way is by casting first acore of copper, it having the higher melting-point,and then while this is at or near the melting-point of alue minium casting the shell of the latter around such copper core, or the operation maybe reversed as to positions, the first cast, of copper, being the shell and the cast of aluminium being the core, or in some cases the hollow and solid ingots may be separately formed and consolidated by hydraulic or other pressure applied before or after cooling or while the core is cold and the shell still heated.

In referring to either of the two component parts of my new conductor I wish to say that they are supposed to be substantially pure; but the presence of slight admixtures of phos- 8c phorusor other well-known deoxidizing reagents is not objectionable, provided the individual characteristics of the two metals are substantially preserved. I

I claim as my invention- A compound electrical conductor composed of a core and a-shell of different metals drawn into wire, one metal being aluminium and the other copper.

Signed at the city of Belfast, Ireland, this 0 9th day of July, 1900. V

- JOHN D. NICHOLSON;

Witnesses:

JOHN M. QUADE, BERNARD PEAKE.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2439408 *Feb 20, 1942Apr 13, 1948Motorola IncPortable radio transmitting and receiving set
US2473888 *Jun 10, 1947Jun 21, 1949Gen ElectricLead-in wire for electric lamps and similar devices
US2569149 *Oct 19, 1945Sep 25, 1951Joseph B BrennanBimetallic structure
US2662831 *Jul 19, 1950Dec 15, 1953Anderson Brass WorksMethod of bonding copper to aluminum or aluminum alloys
US2700212 *Oct 15, 1948Jan 25, 1955Gen ElectricElectrical conductor
US2735170 *Sep 14, 1948Feb 21, 1956 Method-of producing a multilayer strep
US2755542 *May 14, 1949Jul 24, 1956Gen Motors CorpMethod of providing brazed ferrous metal parts with aluminum coating
US3568130 *Apr 7, 1969Mar 2, 1971Kdi Sealtron CorpElectrical connector for aluminum cable
US5223349 *Jun 1, 1992Jun 29, 1993Sumitomo Electric Industries, Ltd.Copper clad aluminum composite wire
US6982385Dec 4, 2003Jan 3, 2006Jeng-Shyong WuWire cable of electrical conductor forming of multiple metals or alloys
US7572980 *Jan 26, 2007Aug 11, 2009Ford Global Technologies, LlcCopper conductor with anodized aluminum dielectric layer
US7935885 *Jul 11, 2008May 3, 2011Ford Global Technologies, LlcInsulated assembly of insulated electric conductors
Classifications
Cooperative ClassificationC23C10/02, Y10S428/939