US986817A - Wire rope or cable. - Google Patents

Description

T. GORE.

WIRE ROPE OR CABLE.

APPLICATION FILED JUNE 22;-1s10.

Patented Mar. 14, 1911.

WWWM

To all whom it may concern:

THOMAS GORE, OF BROOKLYN, NEW YORK.

WIRE ROPE on CABLE.

Specification of Letters Patent.

. Application filed June 22, 1910. Serial No. 568,345. v

Be it known that I, THOMAS GoRn,a citizen of the United States, and .a resident of the borough of Brooklyn, in the .county of Kings andState of New York, have invented certain new and useful Improvements in Wire Ropes or Cables, of which the following is a specification.

The present invention relates to wire.

ropes or cablesfor hoisting, haulage and other purposes, and has more'particularly reference to a protective covering for such.

ropes. Ropes of this character are generally composed of a plurality of strands, each strand comprisinga. plurality of wires,.

twisted together around a fibrous "or metallic core. Surrounding each strand 1s a covering. The strands are designed to take all the strain to which the rope is subjected, and the covering is merely for the purpose of protecting thestrands from exposure and Wear or abrasion in passing over sheaves, &c. Heretofore it has been customary to serve thestrandswith round wire.

zs This is shown in British Patent No. 10346 of 1886. This construction is objectionable because it makes the complete 'rope very bulky owing to the thickness of the wire covering. If thin wire is used to reduce the b llkiness of the rope, the abrasion to which tlie rope is subjected will wearthe wire covering out in a short time. Furthermore the thin round wire covering will tend to wear into the wires comprising the strand and will ultimately sever them. Besides the round wire covering is expensive, as a great deal of wire necessarily has to-be used. It has also been customary in the prior art to use flat strips of sheet steel as a covering for the strands. This is shown in British Patent No. 5696 of 1886. This is objectionable because the fiat strips of sheet steel, being slit from larger sheets, have square edges. When the rope is bent, as in passing over a sheave, the square edges of adjacent windings of the covering will be separated on one side and will be crowded together on the other side. Consequently at the point where the windings are crowded together the adjacent edges will-chats and wear out, besides digging into the wires of thestrand. Sometimes a fibrous thread or wire is interposed between adjacent wlndings. This is not a success because if a fibrous thread is used, it will soon wear out and leave the inner strands exposed and subject to the chafing action of the sheet steel. If a wire is interposed between adjacent windings it will wear out by the action of the raw edgesof the sheet steel and Patented Mar. 14., 1911.

will also tend to be crowded into the, wires of the innerstrands. Moreover, these flat strips are of short length and have to-be pieced together.

The object of my invention is to obviate all these defects, and to that end I use a covering, for the strands of the rope, which i is made of flat Wire with rounded edges.

The invention is illustrated in the accompanying drawings in which Figure 1' 1s 'a general view,of the rope in elevation. Fig.2 is a diagrammatic view showing adjacent windings of the-fiatwirecovering which surrounds each strand of the rope. Fig. 3 is a transverse sectional View through the complete rope, the covering for the strands being somewhat exaggerated in thickness to more clearly illustrate the invention.

Similar characters of reference indicate corresponding parts in the different views. The ropeis, in'the present instance, com posed of .a plurality of strands 1, each strand consisting of a plurality of individual wires 2, the strands being twisted together around a core 3. w hich is here shown as fibrous material, butwhich may be of metal or other material in accordance with well known shop practices. Similarly each strand may harl e a central core of fibrous or othermater1a more flat wires 4 having rounded or convex edges 5. This flat wire is made by rolling cold drawn wire of round section into a flat wire with rounded. edges. This fiat wire can be rolled in lengthsup to 15,000 feet and may be of copper, brass, iron or steel and galvanized if preferred. Preferably this wire is of a much lower breaking strain per square inch than the wires generally used in the manufacture of metal ropes. Owing to the fact that the wire 4 is flat it will not cut into the inner strands as would a round wire, nor will it make the rope too bulky. Furthermore it-is cheaper as less wire is required than it round wire is used. The' Each strand is served with one or when the rope is bent, therounded'edges 5 will ride freely one upon the other without chafing. In this way the life of the rope, and of the 'sheaves over which the re e passes, is increased and the rope is ma e more flexible.

What is claimed, is:

1. Asa new article of manufacture, a wire 2 rope composed of a plurality of strands,

each strand comprising a plurality of wires, twisted together around a core,- and each strand being wound with fiat metal'wire having rounded edges which abut and form joints between adjacent windings.

' 2. As a new article of manufacture, a. wire ropecomposed ofa plurality of strands, each strand comprising a plurality of wires, twisted together around a core, and each strand being. wound with flat metal wire having convex edges which abut and form joints between adjacent windings 3. As a new article of manufacture, a wire rope composed of a plurality of strands,- each strand comprising a plurality of wires,

twisted together around a core, and each strand being wound with cold drawn wire rolled into flat wire with rounded ed cs which abut and form joints .ibetwcen ad a- "cent windings.

4. As a new article of manufacture, a wire strand bein rolled into at wire with convex edges which rope composed of a plurality, of strands,

each strand comprising a plurality of wires, twisted together around a core, and each wound with cold drawn wire abut and form joints between adjacent windings.

5; As a new article of manufacture, a wire rope composed of a plurality of strands, each strand comprising a plurality of wires twisted together, and each strand bein wound with flat metal wire having rounde edges which abut and form joints between ad acent 'convolutions of the wire.

THOMAS GORE.

fiTv'itnesses:

LAURA E. SMITH, AxnL V. BEEKEN.

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