US2463199A

US2463199A - Splice

Info

Publication number: US2463199A
Application number: US597646A
Authority: US
Inventors: Vincent C J Peterson
Original assignee: American Chain and Cable Co Inc
Current assignee: FKI Industries Inc
Priority date: 1945-11-12
Filing date: 1945-06-05
Publication date: 1949-03-01
Anticipated expiration: 1966-03-01
Also published as: GB602948A; DE874259C

Description

' March 1', 1949.

v. c. J. PETERSON SPLICE Filed June 5, 1945 2 Sheets-Sheet l mvzmon mvctwr Cid/Irina ATTORNEY Patented Mar. 1, 1949 UNITED STATES PATENT orsics SPLICE Vincent 0. 1. Peterson, Forty Fort, Pa., assignor to American Chain 8: Cable Company, Inc., Bridgeport, Conn., a corporation of New York Application June 5, 1945, Serial No. 597,848

connecting ends thereof or in fastening an end to a standing part as, for instance, in the formation of a loop or eye.

Splicing constructions should be easy to fabricate, use reasonably small size fittings, and should develop the full strength of the rope. Splices of the conventional kind either do not hold securely or cause a disturbance in the arrangement of the strands of which the rope is made to such an extent that one of the strands is subjected to a greater portion of the load that it would normally carry, causing it to part at less than the rated load of the rope.

It is therefore a primary object of the present invention to provide a method and means of splicing a rope which is easy to apply. .7

It is a further object of the present invention to provide a method and means for splicing rope which entails no substantial loss in flexibility of a rope.

It is a further object of the present invention to provide a method and means for making rope splices which will not require too great an increase in diameter at the splice.

It is a further object of the present invention to provide a method of splicing which will not sacrifice the initial strength of the rope.

Briefly, it is proposed to form a splice by winding the strands of a rope around another rope and securing these strands in place in such a manner that tension will tend to lock the splice together. This will appear as the description proceeds.

\ after application of ferrules thereto;

Fig. 5 is a cross-section on the line 55 of Fig. 4;

Fig. 6 is a longitudinal partial section similar to Fig. 4 after completion of the splice;

2 Fig. 7 is a cross-section on the line 1-1 of Fig. 6;

Fig. 8 shows the first step of a modified method; Fig. 9 shows the second step of this method; Fig. 10 is a longitudinal partial section of a completed splice; and

Fig. 11 is a cross-section on line I i--l i oi Fig. 8.

The present description is applied to the making of eyes, it beingunderstood of course that the same technique can be employed in the making of splices between the ends of ropes or the attachment of a rope to an intermediate portion of another rope. Furthermore, although the generic term rope is used, it must be understood that what is meant is a stranded structure which may be a strand, a rope formed of a number of strands or a cable stranded of individual ropes. Furthermore, the present invention is not limited to structures laid up for their entire length. For instance, a braided structure can be used if it has a laid section of sufficient length to permit formation of the described splice.

In Figs. 1-7, a rope l0 comprising a number a of strands H, which may be laid about a core i2,

is shown with its and strands unlaid, as a preliminary step in makings. splice. As shown, the core i2 is cut ofi at it.

The eye is formed by bringing the unlaid strands about the standing part or the rope with the laid portion closely adjacent thereto. The cut end is of the core is then close to the body of the rope as shown in Fig. 2. The strands are then wound about the standing part of the rope in such a fashion that they lie within the valleys between the adjacent strands of the rope as shown in Fig. 3. They are then secured in place. This is done in the shown form by the use of ferrules These ferrules may be secured in place by swaging or by simple pressing. The amount or swaging or pressing required is dependent to a certain extent upon the distance apart of these ferrules;

' that is to say, if the outer ends of the two ferrules are quite close together, very heavy swaging may be necessary. On the other hand, ferrules separated by a distance or about one lay require considerably less swaging. It will be appreciated, of course, that a single long ferrule could be used. ,This, however, has the disadvantage of being still. when eyes of this nature are 3 used in slings, for example, it is often desired that the sling be as flexible as possible so that, when the sling is used in a choker" hitch, it is free to bend right up to the eye.

In 9. splice made in this fashion the standing part of the rope is not disturbed by operations such as tucking, which are required in ordinary splicing methods. For this reason the standing part of the rope is substantially unaffected by the splicing. The part of the rope which is unlald andwrapped about the standing part of the rope can be re-laid readily to give equal tension to all of the strands, so that there is no development of excessive stress in any one strand. This is particularly true when preformed wire rope is used as the strands thereof naturally wind themselves about the standing part of the rope.

The principle upon which this type of splice holds is different from that obtaining in other types of splices. There are apparently two actions which take place when tension is applied to this splice. In the first place, if the splice is imagined with the ferrule 14 in place, and the ferrule l5 so loose as to permit slipping of the strands, tension on the splice would cause the helically wrapped strands to snub the cable underneath, hugging it and transmitting tension thereto somewhat in the manner of the cables in the U. S. Patent to Kellems, No. 2,164,278. The strands tend to unwind from the rope, which is one of the reasons for the ferrule IS. A further action is engendered by the helical disposition of the unlaid strands about the body of the rope in the valleys between the strands thereof as a result of this unwinding tendency. Unwinding cannot actually takeplace without the strands climbing out of the valleys in the rope body, which is prevented by the ferrule l5, the result being a jamming of the strand against the rope body. It will be appreciated, of course, that there must be a certain amount of resistance to movement of the strands relative to the rope bod generated by the compression of the ferrules, especially by ferrule [4, in order to bring this action into play. This resistance in itself takes part of the load. If the swaging or pressing is extensive. it will take a considerable portion of the load.

In Figs. 8 to 11 a modified formof the present invention is shown, in which an eye is formed in a slightly diiferentmanner. In the practice of this form of the invention, the rope 20, comprising strands 2| laid about-a core 22, is split into two parts, as shown in Fig. 8, by unlaying half of the strands from the core for a suificient distance to form the eye required. The core is then cut at 23, and the strands 2l-B which surrounded the cut off portion of the core are unlald from each other and helically disposed The strands 60 about the standing part of the rope. 2l-A are relaid about the core and strands 2 I-B, starting at the unstranded end, forming the eye 24. The ends of strands Zl-A are then unlaid and helically wrapped about. the standing part, in the manner shown in Fig. 10. The strands 2l-A and 2l-B are thus disposed about the standing part of the rope in the same manner as those of Figures 1 to 3. A single ferrule, or, preferably, two ferrules 25 and 26 are then pressed,

swaged or otherwise secured to the helically wrapped strands as described in connection with the first form.

As a further modified form, it is possible to modify the form shown in Figs. 1 to 7 by inserting the ends of the strands under the strands of the standing part of the rope, laying them directly around the core, with the strands of the standing part lying in the valleys of the rope laid within it. This is perfectly feasible but it 5 is a time-consuming operation compared to the forms described.

While I have described a certain particular construction in which my invention is incorpo-. rated, I do not desire to be limited to this particular embodiment since many changes and modifications may easily be made without departing from the spirit and scope of the invention as set forth in the following claims.

I claim: 1. A metallic wire rope connection comprising a section of rope having a laid portion and a second section having a laid portion and a splayed portion, both laid portions 'being of the same direction of lay, the strands of the splayed portion being of uniform cross sectional area throughout their length and wrapped around the laid portion of the first-mentioned section, said strands lying along and in the valleys of the laid portion that they overlie, and said splayed portion being directly connected to the strands of the laid portion of the second mentioned section and lying entirely outside of the laid portion of the first-mentioned section, and a fitting retaining the strands of the splayed portion in 30 position.

2. A metallic wire rope connection com rising a section of rope having a laid portion and a second section having a laid portion and terminating in a splayed portion, both laid portions having the same direction of lay, the strands of the splayed portion being of uniform cross sectional area throughout their length and wrapped around the laid portion of the first mentioned section, said strands lying along and in the valleys of the laid portion that they overlie, and said strands being directly connected to the strands of ,the laid portion of the second mentioned section and lying entirely outside of the, strands of the laid portion of the first mentioned section, and a compression fitting pressing said splayed strands against the rope they overlie for at least part of their length.

3. An eye fora length of laid metallic wire rope comprising a bight formed in the rope, the laid strands of the bight terminating in a splayed portion, the strands of the splayed portion being wrapped around the standing part of the rope and lying in the valleys between the strands of the portion of the standing part of the rope that they overlie and lying entirely outside thereof, and compression fittings pressing said splayed strands against the rope they overlie for at least part of their splayed length.

4. An eye for a length of laid metallic wire rope comprising a bight formed in the rope, the standing part of the rope having a splayed portion, the strands of said splayed portion being wrapped around the laid end of the portion of the rope forming the bight, the strands of the-splayed portion lying in the valleys of the laid portion that v they overlie, and compression fittings encircling the strands of the splayed portion and pressing them against the laid portion that they overlie.

5. An eye for a length of laid metallic wire rope comprising a bight having some of its strands passing from the standing part around the eye in one direction, and the remainder of the strands passing from the standing part of the rope around the eye in the opposite direction, all of said strands being laid up in the bight substantially as in the 5 8 atan part and in the same direction of lay, the 1 tmn t n or the blght terminating in a splayed por- UNITED Sum PATENTS tion. the splayed portion eingwrapped around Numbe Name Date the standing part of the rope, the strands of the 878,916 Wally Feb. 11, 1908 spleyed portionlying along the valleys oi the inr- 5 2,083,369 Greene June 8, 193'! tion' of rope they overlie, and compression fittings pressing the strands of the splayed portion against OTHER CES the portion or the rope that they overlie. iin smlopedm of nots and arm Rope'wor VINCENT c. J. PE'I'ERSON. y Granmont- 1 Hensel (3rd ed), published by the Cornell REFERENCES crrnn Maritime The following references are of record in the file of this patent: