US626980A - Rail-bond for electric railways - Google Patents

Description

Patented lune l3, I899.

F. u. DANIELS. BAIL BOND FOB ELECTRIC BAILWAYS.

(Application filed Apr. 25, 1899.)

(No Model.)

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rn'snn. DANIELS, OF WORCESTER;MASSACHUSETTS.

RAIL-BOND FOR ELECTR EC RA BLWAYS.

SPECIFICATION forming part of Letters Patent No. 626,980, dated June 13, 189.9.

- Application filed April 251 1899' To (all whom. it may concerh:

Ee'it known that I, FRED II. DANIELS, a citizen of the United States, and a resident of \Vorcester, in the county of Worcester and State of Massachusetts, have invented a certain new and 'useful Improvement in the Manufacture of Rail-Bonds for Electric Railways and other Purposes, of which the following is a specification.

My invention has reference to a rail-bond designed more particularly for use as a connection between the terminals of the two adjoining rails of an electric railway, and consisting of strands of copper wire twisted together in the flattened copper-wire rope or ca- .ble, as shown, for example, in Figure .2 of the drawings of my Patent No.;582,'849, of May 18, 1897. Iii-making such bonds it has been found when the ropeor cable is flattened that the wires of which it 'iscomposed are bruised a'nd'indented one into theother, and in some instances nearly or quite cut through by the pressure requisite t'o fiatten'the rope, while the conducting power of the bond as a whole is materially impaired. I "have discovered that thisdefect can be obviated entirely by omitting from the interior of the cable several of the strands, dependingin number upon the cross-section of the cable and the number of strands of wire composing it, the cable in' effect being tubular or pipe-like instead of solid throughout, 'as heretofore has been the When this tubular or pipe-like cable is flatt 'ned, the wire strandsunder the'pressure to which they are subjected have the opportunity, owing to the space afforded for this purpose by the tubular structune of the un- I flattened cablato adjust themselves to their new position and in their new relations without any injury tothemselves or without cutting or bruising one another, the resulting product being in this respect noticeably different from the flattened bond made from orserum, 714,395. (Nomodel) dinary copper-wire cable, and, moreover, be-

ingmuch more flexible and satisfactory in every way than the latter.

In the accompanying drawings, Fig. 1 is a view of a section of the. tubular or pipe-like copper-wire cable or rope from which the con-- necto'r or bond is to be made.

Fig.2 is a cross-section of the same.

Fig. 3 is a view of the bond after it has been flattened out betweenits ends. the samethrough the flattened part.

'7 The copper-wire rope or cable is shown at A, Fig. 1.. The difference between it and the ordinary copper-wire rope is that several of. the-central or core wiresin thisinstance sev en-.-are omitted, thus giving to the rope a tubular or pipe-like structure. lhis tubular rope-is shown in Fig. 2 as flattened, with the exception of its ends.

Fig. 4; is a cross-section of v Till-BBB ends themselves can be secured or welded by pressure to suitaforesaidpatent, No. 582,849.

Having described my improvement, what I claim, and, desire to secure by Letters Pat-- out, is-.-

1. The improvement in the manufacture of rail bonds or connectors for electric railways which consists in forming from strands of copper wire a tubular rope or cable, and then flattening said rope or cable by pressure, sub- .stautially as andfor the purposes hereinbe- ,foreset forth.

2. As animproved article otmanufacture,- a rail-bond made from tubular flattened copper-wire rope or cable, as hereirnbefore set forth.

:In testimony whereof I havehereunto set 80 my hand his 21st day of April, 1899.

- FRED II. DANIELS;

\Vitnesses:

N. G. STODDARD, Gnn'rnunn' LAMPSON.

able-terminals in the manner set forth in my

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