US283764A - Pateick b - Google Patents

Description

UNITED STATES PATRICK B. DELANY,

OF NEW YORK, N. Y.

ELECTRICAL CONDUCTOR.

SPECIFICATION forming part of Letters Patent No. 283,764, dated August 28, 1883.

Application filed May 10, 1883.

To all whom it may concern.-

Be it known that I, PATRICK B. DELANY, a citizen of the United States, residing in the city, county, and State of New York, haveinvented an Improved Electrical Conductor, of which the following is a specification.

My invention relates to that class of conductors in which a metal of high conductivity is used in connection with a metallic conductor of less electrical capacity, but capable of enduring the tensile strain to which telegraphic conductors are necessarily subjected.

Heretofore iron. steel, and perhaps other electrical conductors, have been coated with a deposit of copper. While such a method or manufacturegives the desired conductivity, in handling the wire the copper coating is liable to crack and perhaps to scale off. It has also been proposed heretofore to wrap an iron or steel core with a copper ribbon, and then to coat it with tin by immersing or passing it through a bath. Such a method of manufacture is, however, objectionable for the reason that the contact between the overlapping edges of the copper ribbon is liable to become impaired, and in handling the conductor the ribbon may spring or become loosened fromthe iron or steel core. I

The object of my invention is to obviate these difficulties, and to produce a compound electrical conductor which may be manipulated with perfect freedom without fear of injury to it.

In the accompanying drawings, Figure l is a view, partly broken away, of asection of my improved conductor. Fig. 2 is a transverse section therethrough, and Fig. 3 is also atransverse section of a conductor without an insulating-coating.

I take an iron, steel, phosphor-bronze, or other core, a, capable of enduring the tensile strain and manipulation to which it may be subjected, and braid or otherwise form around it an envelope or sheath, b, of comparatively fine wire of small resistance, such as copper. This braiding may be like the fibrous insulating-braiding of the ordinary insulated wire, and may be done by any of the ordinary braiding-machines adapted for that purpose. The conductor thus formed may, if desired, be coated withtin, lead,.or zinc, 0, or other suit- (No model.)

able metal or alloy of either high or low resistance, as may be thought best, by subjecting it ble to break, crack, or separate from the core.

Ihave said fine copper wire, as that is best adapted for the purpose; but the size of the wire may be varied within wide limits. The conductor may be covered with a coating of insulating compound, as illustrated in Figs. 1 and 2.

I claim as my invention 1. A compound electrical conductor, consisting .of the combination of a strain-wire conductor of high tensile strength-and capable of enduring the necessary strains, and an envelope, sheath, or covering composed of comparatively fine wire of relatively low resistance.

2. The combination, substantially as set forth, of a strainwire of requisite tensile strength, and an envelope, sheath, or cover ing of copper wire braided thereon.

3. An electrical conductor consisting of a central wire or conductor having braided thereon a sheath of comparatively fine wire of relatively low resistance.

4. The compound electrical conductorherein described, consisting of the combination of the strain-wire or central core of requisite tensile strength, a sheath of relatively fine copper wirebraided thereon, and an outer coating of insulating material.

5. A compound electrical conductor, consisting of a strain-wire, its envelope or sheath composed of fine copper wire, and an outside coating of metal, substantially as set forth.

In testimony whereof I have hereunto subscribed my name this 7th day of May, A. D. 1883.

PATRICK B. DELANY.

fitness es FRANK W. J ONES, FEEDK. P. J oNEs.

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