US1260582A - Wire rope. - Google Patents

Description

' c e. ROEBLING.-

WIRE ROPE. APPLIQAUON FILED AHLZB. I915.

Patented Mar. 26, 1918.

UNKTED TATE PATENT @FlFUbCit-il.

CHARLES G. ROEBLING, OF TREN'I'ON, NEW JERSEY, ASSIGNOR TO JOHN RUEBLINGS l SONS COMPANY, A CORPORATION OF NEW JERSEY.

WIRE ROPE.

Specification of Letcers Patent. Patentgd m 2.1; j gjg.

Application filed April 26, 1915. Serial No. 23,960.

' New Jersey, have invented certain new and useful Improvements in \Vire Rope, fully described and represented in the following specification and the accompanying drawings forming a part of the same.

The'especial object of the invention is to provide an improved wire rope composed of amumber of strands which shall be of greater flexibility, strength and durability than previous wire ropes, and the invention relates particularly to a novel construction of the strands for such ropes. The strands embodying the invention, however, may be used as a one strand,rope, and such use is included withinthe invention.

The invention includes a novel strand composed of a core and three layers of wires. in which the wires are so selected and stranded that the cross-lay and consequent nicking resulting from the old method of laying up such strands are entirely avoided, and a large increase in metallic area and consequent increase in tensile strength secured, while the construction secures compactness and the wires are locked in position so as to prevent their being displaced in service.

As a full understanding of the invention can best be given by a description of a construction embodying the same, such a description will now be .given in connection with the accompanying drawing showing some of the preferred forms of embodiment of the invention, and the features forming the invention will then be specifically pointed out in the claims.

In the drawings:

Figure l is a cross section of a 37 wire strand or rope embodying the invention.

Fig. 2 isa side elevation of the same.

Figs. 3 and 4 are views similar to Fig. 1 showing, respectively, 29 and 41 wire strands or ropes.

Fig. 5 is a cross section of a wire rope made up of a core and six strands, such as shown in Fig. 1.

Referring now especially to Figs. 1 and 2, a is the core of the strand or rope, which, core may be of wire, hemp or other material. Around this core and wound compactly upon the core, side by side. are nine wlres Z2 forming the inner layer of the threelayer rope. Around the outside of the wires 6 are wound an equal number of wires (7, these wires being laid in the interstices be tween each pair of wires Z) and being of such size as to form a complete covering layer. Outside the wires 0 are laid wires (Z in the interstices between each pair of wires 0, and between these wires (7 are laid small wires e, which rest upon the erown of the wires throughout their length. so as to produce a continuous bearing without a ny cross-lay, the outer layer of wires thus eon sisting of twice the number of wires in the first and second layers. It will be understood that all the wires ?1, 1-, (7. c. are laid up with the same lay, so that the wires r' are interlocked in the interstices between the wires 6 throughout their length. a. d the. wires (Z similarly interlocked in the interstices between the wires while the wires are locked in position between the larger wires (Z. The wires (I, e. will preferably. as shown, have such ratio in diameters 11s to produce substantially a round strand.

In Fig. '5 there is shown a rope consisting of a core A and six strands B. such as shown in Figs. 1 and 2. laid thereon. It will be understood that the number of strands used in making up the rope may be varied, as usual or desired, the six strand rope being shown only for purpose of illustration.

The strand or rope shown in Fig. 3 is the same in principle as that shown in Fig. 1. 'but is a 29 strand rope, being composed of an inner core f of wire. hemp, or other material, and has a layer of seven wires 1 laid about the core. a second layer of seven larger wires 71 laid upon the wires g. and an outer layer of fourteen alternating large and small wires 2', 7., as described in connection with Figs. 1 and 2.

The. strand or rope shown in F ig. l is the same in principle as that of Figs. 1 and 3, but" is a 41 wire strand, having an inner core Z, an inner layer of ten wires m. a second layer of ten wires 11, and an outer layer of twenty alternating large and small wires 0,

From the, above description and illustration of three strands made up oi": differing numbers of wires, the applied-ion of the ins . d'erstood.- a f It will be a continuous I their original position side displacement or creeping of the indi invention in making up strands having other. numbers of wires will readily be unseen that-the arrangements of wires in the strands above shown and described avoid to a great extent air spaces or voids and thus secure an increase in metallic area for a given diameter of strand, and a' corresponding increase in tensile strength of the strand. Gross-lay or one point bearings of any of the wires of any of the outerlayers on the wires of the next inner layer-is also avoided, thus securing increased strength and efliciency due to the elimination o f the tendency to nicking of the'wires by cross-lay or one point bearing,

' bearing a mportant, also, in securing compadtness strength of construction, and in prenting the wires from being displaced from in service, so that vidual wires or layers in service is entirely avoided.

What I claim is: 1.. A wire rope or strand comprising a core, a first layer of round wires wound around said core side by side, a second layer of round wires on the first layer, the wires of said second layer being the same in number as the wires of the first layer and lying in the interstices between the wires of the first layer, and a third layer of round wires upon the second layer, the wires of said third layer being double the number of the wires of the second layer, and alternate wires of said third layer lying in the interstices be-- tween the wires of the second layer and upon the crowns of the wires of the second layer.

2.'A wire rope or strand comprising a.

core, a first layer of round wires wound around said core side by-side,'a second layer of round wires on the first layer, the wires of said second layer being the same in number as the wires of the first layer and lying in the interstices betweenthe wires of the first layer, and a third layer of round wires upon the second layer consisting of alternatin'g large and small wires, the larger wires being equal in number .to the wires of the second layer and lying in the interstices between the wires of the second layer, and the smaller wires of the outer layer being equal in number to the wires of the second layer and lying upon the crowns of the wires of the second la er and between the larger for all the wires Y throughout their length being secured. The, ",interloeking' of all the three layers of wire ,the wires of the first layer,

strands, each strand comprising a core, a first layer of round-wires wound around said layer being double the number of the wires of the second layer, and alternate wires of said third layer lying in the interstices be tween the wires of the second layer and upon the crowns of the wires of the second layer.-

4. A wire rope consisting of a plurality of strands, each st 'and comprising a core, a first layer of round wires wound around said core side by side, a second layer of round. 'WlI'GS on the first layer, the wires of said second layer being the same in number as the wires of the first layer and lying in the interstices between the wires' of the first layer, and a third layer of round wires upon the second layer consisting of alternating large and small wires, the larger wires being equal in number to the wires of the second layerand lying in the interstices between the wires of the second layer, and the smaller wires of the outer layer being equal in number to the wires of the second layer and lying upon the crowns of the wires of thesecond layer and betweenthe larger wires of the third layer. A wire rope or strand comprising a core, a first layer of round Wires wound around said core side by side, a second layer of round wires 011 the first layer, the wires of said second layer being the same in number and larger than the wires of the first layer and'lying in the interstices between and a third layer of round wiresupon the second layer, the wires of said third layer being double the number of the wires of the second layer.

6. A wire rope or strand comprising a core, a plurality of layers of round 'wires upon said core, the wires comprisin eachlayer being the same in number anc lying in the interstices between the wires of the preceding layer, and an outer layer of round wires having double the number of the wires in each of the preceding layers.

, In testimony whereofiI have .hereunto set my hand, in the presence of two subscribing witnesses.

CHARLES G. ROEBLING.

Witnesses E. TH0MPSQN, N. C. HARRISON.

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