US1714050A - Cable fitting - Google Patents

Description

Patented May 21, 1929.

UNITED STATES JAMES SCOTT, OF CLEVELAND, OHIO.

CABLE FITTING.

Application filed July 14, 1927. Serial No. 205,642.

My invention relates to cable supports or fittings and particularly to that class of fittings to which a cable or span wire is anchored and which may be attached to a support and insulated from the support if desired.

The object of my invention is to provide a fitting which is simple, economical to install and which will securely grip a cable or span wire and hold it against relative movement.

My invention resides in the new and novel construct-ion, combination and relation of the various parts herein described and shown in the drawing accompanying this specification.

In the drawing Fig. 1 is a plan view of the single form of.

my invention, in which a single clamp is shown and how it may be applied to an insulator.

Fi .2 is a side view of my invention and is o the double form in which two like clamps are used connected by an interlink form of insulator.

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 is a longitudinal sectional view of the clamping portion of my invention taken on the line 44 of Fig. 1 and shows in addition a span wire or cable clamped in position. Fig. 5 is a sectional view taken on the line 55 of Fig. 1. Fig. 6 is an edge view of one of the clamping members. i

Fig. 7 is a side view of Fig. 6. Fig. 8 is a sectional view taken on the line 88 of Fig. 7.

4 In the preferred embodiment of my invention I provide the body member 1 and from one end thereof projects the spaced arms 2 provided at one end with a passage in which is positioned the bolt and nut 3. Between the arms 2 is positioned an insulating memher 4:, shown in dotted lines, and secured in place by means of the bolt and nut 3. The insulator may be of the interlink type shown in the drawing or it may be a spool type, in which case the bolt will be straight in place of curved as shown. If desired, the insulator may be done away with and the spaced arms connected directly to a fitting or cable if desired for securing the device in place. Also there may be substituted for the arms 2, an

eye member for attachment to a support.

If two clamps are used as shown in Fig. 2, then I prefer to use the interlink type of insulator in which the porcelain is under compression and the clamps will not separate if the insulator should be shattered and fall away.

The body member is provided upon one face with a longitudinal disposed groove 5 and one or more transverse openings 6 in line with the groove 5. Each transverse opening 6 is provided with an enlarged rectangular shaped portion 7 The longitudinal groove 5 is so shaped as to form a serrated or humped surface in which the high points or humps are interposed between the trans verse openings 6 where two or more openings are used.

.Positioned in each opening 6 is a holding member 7 having a threaded shank. Each member 7 is rovided with a head 9 which forms with t e shank of the member 7 a T headed bolt. The projecting portions of the head 9 have formed in their lower face a groove 10, and it will be noted in Fig. 4 that the lower face of the projecting portion of the head 9 tapers upwardly toward the ends of the head. The shank of the holding member 7 is provided with a hole 11 therethrough to receive the span wire for cable 12.

The portion of the shank immediately below the head 9 in which the hole 11 is positioned is of a rectangular formation as shown in Fig. 8 and this formation engages with the side of the enlarged portion 70f the transverse opening 6 .to revent the relative rota' tion of the member and the body member 1 and prevents bringing a twisting strain upon the cable 12 in tightening up the nuts 8, should there be a tendency for the nut to rotate the member 7.

In order to install the single form of my invention shown in Fig. 1, it is only necessary to secure the insulator 4, or the eye which may be substituted for the insulator and already referred to, to a pole or other support and then to pass the end of the span or cable 12 through the holes 11 inthe members 7. This having been done, the nuts 8 are drawn up, thereby drawing the span wire 12 down into the depressions formed in the groove 5, and thereby securely seating the span wire in the groove 5 and drawing the projecting parts of the head 9 into engagement with the cable.

The double form shown in Fig. 2 can be cut into span wires, strain wires, conductors, pole guys, etc., and involves merely securing the ends of the cable, wires, etc. to

' companied with very serious results.

the clamps as described in the single form in Fig. 1. I

The double form has the advantage over the single form in that the part of the clamp castings which are secured to the insulator and which are somewhat close to each other are not subject to electrolysis, to the same degree,

, due to surface leakage, that the wires of the cable are, and which wires would be secured to the insulator in the form shown in Fig. 1.

It will be observed that my invention requires the operation of only one nut inconnection with each holding device. There are many cable clamping devices upon the market which have the holding device of a U shaped formation and each leg is provided with a nut or the holding member may use what is known as a J, bolt which has only one nut, but this is deficient in that in drawing the nut into position the end of the bolt may open up or yield, thereby preventing sufliciently securing the cable in place, and the end of the J bolt may yield after the device has been in operation for a while and permit the cable to with-draw which may be ac- By the use of the fastening device herein described, I securethe strong grip affected by the U bolt with the advantage of the single Irut of the J bolt, which provides a device which is economical in con'structionand much smaller and quicker to install than devices now on the market.

The humpedicondition of the longitudinal groove aids in holding thespan wire in position and the upwardly and outwardly tapering groovelO in the under face of the projecting portions of the head 9 tends to prevent the outer edges of the head 9 from cutting into and injuring the cable, and it will be noted that'i'the slope of the lower face of the head 9 corresponds approximately with the slope of the surface'of the groove 5 in a longitudinal direction. I

It will be understood that while I have described my invention for' connecting cables or stranded wires, it can alsobe used to connect solid wires.

There will of course be modifications in my invention herein described and disclosed which will be apparent to those skilled in the art. Therefore I do not wish to other than by my claims.

I claim v 1. A cable fitting comprising a body mem ber having means at one end to secure the body to a support, a longitudinal groove in one face of the body member, one or more transversely disposedopenings through the body member in line with the groove, a holding device passing througheach opening and having a longitudinal opening therethrough to receive a cable, projections above each openbe limited ing in line with the groove; and means to draw the cable positioned in the opening in the holding device towards the body member and the cable into the groove.

2. A cable fitting comprising a body member having means to secure the body member .to a support, a longitudinal groove in one face of the body member, a plurality of transversely disposed openings through the body member in line with the groove and a holding device in each opening, a longitudinally disposed passage through each holding device, to recelve a cable, means pro ecting longltudinally from the holding device to engage the cable; the portion of the body between adjacent holding devices being raised to form humps and means to draw the cable towards the body member. I

3. A cable fitting comprising ,a body member havingmeans at one end to secure the body to a support, a longitudinal groove in one face of the body member, one or more transversely disposed openings through the body member in line with the groove, a holding device passing through each opening and having a longitudinal opening therethrough to receive a cable and means to draw the cable positioned in the opening in the holding device towards the body member and'the cable into the groove, means on the holding device cooperating with means on the body member to prevent relative rotation of the parts when the said drawing means is rotated.

4. A cable fitting holding device comprising a T headed bolt having a threaded shank at one end and a projecting head at the op-' posite end, the intermediate portion having a square or rectangular section and a passage therethrough in line with the projections of the head, rotatable means on the threaded portion to move the device relative to the support and the lower face of the projecting portions of the head being grooved and sloping upwardly and outwardly.

5. A cable fitting comprising a body member having means to secure the body member to a support, a longitudinal groove in one face of the body member, a plurality of transverse openings through the body in line with the groove and a holding device in each opening, a longitudinally disposed opening through each holding device to receive a cable, means on the body cooperating with each head in alinement with the groove and means on each holding device to draw the head toward the body member to grip a cable therebetween, the head and said part being positioned in a common plane.

7. A cable fitting comprising a member having a seat-forming groove in one face thereof, means to secure the fitting to a supporting insulator and T-headed clamping means arranged in alinement and having a part extending through openings in the'memher and having the heads arranged in alinement with the groove and in the same plane with the said part and means on each clamping means to draw the head towards the groove.

8. A cable fitting comprising a body memher, means to secure the member to a support, a longitudinally disposed groove on one face of the "body and having alternately raised and depressed portions in alinement, a plurality of clamping members having T- shaped heads in alinement positioned above the depressed portions of the groove and a shank integrally formed with each head, a transverse opening through the shank of each clamping member adjacent the head, 'a passage through thebody for each shank and means on each shank to draw the clamping member towards the body member and into engagement with a cable.

In testimony whereof I afiix my signature.

JAMES SCOTT.

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