US2454417A

US2454417A - Sling

Info

Publication number: US2454417A
Application number: US756359A
Authority: US
Inventors: Charles M Zerr
Original assignee: UNION WIRE ROPE CORP
Current assignee: UNION WIRE ROPE Corp
Priority date: 1947-06-23
Filing date: 1947-06-23
Publication date: 1948-11-23
Anticipated expiration: 1965-11-23

Description

c. M. ZERR 2,454,417

SLING Nov. 23, 1948.

Filed June 23, 1947 HlllllhlllllllllllllllllI INVENTOR.

fly, .2. 4 Char/e5 M Ze/r BY E ORNEY.

atenied Nov. 23, 1948 NlTE ' 'suno Charles M. Zerr, Independence, Mo esslgnor to Union Wire Rope Corporation, Kansas @lty, Mm, a corporation ofMissouri Application June 23, 1947, Serial No. 258,359

" 7 Claims.

This invention relates to the art of rope making including slings, and particularly wire cables and slings fashioned therefrom, the primary aim being to provide a sling capable of being formed by machines presently used in the industry and having looped ends formed by a novel splicing structure.

The most important object of this invention is the provision of a sling wherein the plurality of these ropes in desired numbers. as hereinafter either a regular left my, "regular right lay" or what is termed "Lang lay. In the drawing,

thewires ii) are laid to the left, whereas the strands l2 formed thereby are laid to the right to create the regular right lay rope it. There are three of these strands in each rope M. This laid up ropes forming the cable body are rebent lil efi y o the Wires l9 d right l y of t upon themselves to form a loop and then twisted, individually about corresponding ropes of the standing part of the cable to form a neat appearing, strong and smooth splice.

Another important object of this invention lies in. the manner in which the wires, the strands, and the ropes of the cables as well as the splice per se are laid up in alternate directions of twist.

A further important object of this invention is to provide a sling loop splice having all the ropes of the rebent end twisted in the same direction about the ropes of the standing part of the body ofthe sling.

A still further object of this invention is the provision of a sling having splice seizing capable of effectively covering and binding in place the ends of the several strands of the splice, which seizing is formed either of wire having a coating of fusible material that integrates upon 245- 3 plication of heat or a coating effectively applied without the employment of heat.

Many minor objects will be made clear or become apparent during the course of the following specification, reference being had to the aca companying drawing, wherein:

Figure 1 is an'elevational view of a sling made in accordance with the present invention, parts being shown in an unfinished state for clearness.

Fig. 2 is an enlarged fragmentary, perspective view thereof; and I l Fig. 3 is a fragmentary schematic view thereof showing the manner of forming the'splices.

It is well appreciated by those skilled in this the numeral l8, shown especially at one loose 55 end in Fig. 2. The procedure used in so twisting the wires it) into a strand is commonly referred to as laying.

Strands l2 in desired numbers as later specified are used to produce ropes and, in turn,

strands i2 is clearly shown at the untwisted or broomed out ends in Fig. 2. The direction of relative lays may be reversed from the positions as just set forth above and as specified in the following description. a

A cable broadly designated by the numeral I6 is then formed by laying the ropes M to the left,

presenting the same directional lay for the wires 0 well be varied depending on the use intended for sling 20 in the same manner as varying the 19 wires I 0 of the strands l2. However, for best results, it is preferable to utilize either 2, 3 or 4 of strands 12 and either 2, 3 or 4 of ropes l6.

5 The strands and ropes so twisted will lay in close juxtaposition whereas when 5 or more strands or ropes are laid, gaps and spaces will be present between the individual units.

The three unlaid ropes l4 extending from seizings 24 to the free ends of cable iii are then woven into the standing part of body iii to present splices 2B. These individual ropes M at the end of sling 20 are each separately twisted about a respective one of the ropes i l of the 5 standing part of body in and the lay is to the right or opposite to the lay of ropes it to form cable it.

In Fig. 3 the three unlaid ropes M of the loop 22 are designated by the letters a," b and "c and the ropes it of the standing part of body it are referred to by letters at, e and f. It is clear that rope a is twisted about rope d, rope. I) about rope e and rope 0 about rope 7. One of these individual twists of the corresponding ropes M in splices 26 is clearly shown.

in Fig. 2 and designated bythe numeral 23.

The ends of the ropes M of loops 22 are clipped relatively close to body l8 at the innermost end of splices 26 when a splice of suificient length has been formed. These ends generally designated by the numeral 30 and constituting the three strands I! of each rope I! are covered by seizing 82. i

seizing 32 comprises a length of wire 34 having a'coating of pliable material that may be fused by the application of heat.

After wire 34 with its fusible coating 38 is wound tightly around splice 28 for an area willcient to completely cover ends 30, heat is applied thereto. Plastic is highly desirable because oflts inherent quality of fusing upon itself and upon the splice 20 as well as the ends 30. When heat is so applied, the fusible material which may take many forms other than plastic, will run together to present a solid sleeve asshown in Fig. 2 at the uppermost end of seizing 32.

Thewire 84 being tightly wound upon splice 28 will serve to reinforce the fused body and to hold thesame in place rigidly upon splice 28. A smooth surface that is free from bulkiness is afforded in a manner not heretofore made possible by conventional types of splice seizings.

It is clear that all the above described desirable features taken together present a sling that will embody many advantages when placed in use. A strong, highly flexible and unbulky sling capable of many usesin handling loads of widely differing contours is present in the instant invention. v

The particular manner of laying the splices taken with the type of seizing illustrated and described prevents unravelling and catching of loose ends on the work handled. The splice itself is extremely neat in appearance and hardly perceptible as a splice. The individual wires. strands and ropes not only in the body of the sling but in the loops and splices are each so interwoven as to bear equally the load and stresses imparted thereto. The alternate laying of the separate units and the precise manner in which the ropes are twisted presents a juxtaposition of parts in such manner as to decrease the usual wearing of the small wires of the cable by rubbing together during use of the sling.

Although the present invention has been described having reference to specific examples and applications, it is manifest that it is not desired to be limited thereto because obvious modifications will readily present themselves to .those skilled in the art. 7

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. A sling of the character described comprising a plurality of ropes laid up to present a cable forming the body of said sling: and at least one loop formedby bending one end of the body upon itself, said one end of the body being secured to the standing partof the body by a splice, said ropes of the end of the body being twisted upon the ropes respectively of the standing part of the body to form said splice.

, 2. A sling of the character described comprising a plurality of ropes laid up to present a cable forming the body of said sling; and at least one loop formed by bending one end of the body upon itself, said one end of the body being secured to the standing part of the body bya splice, said ropes of the end of the body being twisted upon the ropes respectively of the standing part 0 the body to form said splice, the direction of" twist of all of said ropes within the splice being the same.

3; A sling of the character described comprising aplurality of ropes laid up to present a cable forming the body of said sling; and at east one loop formed by bending one end of the body upon itself, said one end of the-body being secured to the standing part of the body by a splice, said ropes of the end of the body being twisted upon the ropes respectively of the standin part of the body to form said splice the direction of twist of all of said ropes within the splice being opposite to the direction of lay of the ropes of said body.

4. A sling of the character described comprising a plurality of ropes laid up to present a cable forming the body of said sling, each of said ropes comprising a number'of twisted strands; at least one loop formed by bending one end of the body upon itself, said one end of the body being secured to the standing part of the body by a splice with the ends of the strands adjacent said end of the body projecting laterally from the standing part of the body; and seizing circumscribing said splice adjacent said ends of the strands, said seizing having a material included in the formation thereof capable of fusing upon itself upon application of heat thereto.

5. A sling of the character described comprising a plurality of ropes laid up to present a cable forming the body of said sling, each of said ropes comprising a number of twisted strands; at least one loop formed by bending one end of the body upon itself, said one end of the body being secured to the standing part of the body by a splice with the ends of the strands adjacent said end of the body projectinglaterally from the standing part of the body; and seizing circumscriblng said splice adjacent said ends of the strands, said seizing having a material included in the formation thereof capable of fusing upon itself upon application of heat thereto, and arelatively stiff stiffening material.

6. A sling of the character described comprising a plurality of ropes laid up to present a cable forming the body of said sling, each of said ropes comprising a number of twisted strands; at least one loop formed by bending one end of the body upon itself, said one end of the body being secured to the standing part of the body b a splice with the ends of the strands adjacent said end of the body projecting laterally from the standing part of the body; and a wire seizing coiled about said splice adjacent said ends of the strands, said wire having a covering of material capable of fusing upon itself upon application of heat thereto.

7. A sling of the character described comprising a plurality of ropes laid up to present a cable forming the body of said sling, each of said ropes comprising a number of twisted strands; at least one loop formed by bending one end of the body upon itself, said one end of the body being secured to the standing part of the body b a splice with the ends of the strands adjacent said end of the body projecting laterally from the standing part of the body: and a wire seizing coiled about said splice adjacent said ends of the strands, said wire having a covering of material capable of fusing with the wire and that portion of thesplice adjacent thereto, including said ends of the strands when heat is applied thereto.