US1857437A - Cable clamp - Google Patents

Description

MaylO, 1932. K LE v 1,857,437

CABLE CLAMF Filed Feb. 2.4, l93l !hua/dor [/mrK Cela.

Pat nta& May 10, 1932 UNTED P TENI* OFFICE I g ELMER ,K cmbr v wmrnnsm', iowA i damn GLAM P Application filed February 24, 1931. Serial No. 517,837.

My invention relates to that class of'cable clamps which are employed inconnecting a guy wire cable or the like 'to an anchor rod.

My object is to 'provide a clamp of this character of simple, durableand inexpensive Construction, which may be made of cast malleable metal, and without machining any other than screw threads, and to which a cable stretched taut may be readily, quickly 7 and easily applied and firmly and securely anchored. v

My invention consists in the Construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attai'ned,as hereinafter more fully set forth, pointed out in ny claims, and illustrated 'in the accompanying drawings, in which: I 1

Figure 1 shows a top or `plan view of a T cable clamp embodying my invention `with a cable clamped therein.

Figure 2 shows a side elevation of same partly in section. c g Figure 3 shows a top or plan viewofthe body portion of the clamp with the upper clamping member and bolt removed.

`Figure 1 shows a top view of the lower clamping member; and u Figure 5 shows an inverted planview of the upper clamping member. A

Referringto the. accompanying drawings, I have used the reference numeral toindi- Cate generally the body portion of the clamp. v At' oneend it is preferably provided with an enlarged portion 11, having a'screw threaded opening 12 to receive a screw threaded anchor rod, not shown. The body portion is preferably substantially oval and substantially flat on its upper and lower surfaces Theupper 1 surface, however, s provided with a groove 13 to receive a cable 14, asshown in Figure 3, and toward the rear end of'the top surface there is a raised post 15, for purposeshereinafter made clear. In the center of thebody portion is a screw threaded bolt opening in which a bolt 16 is seated. f

Rotatively mounted upon the boltlis a sleeve 17 having its upper end made of angular formation to receive a wrench. On the V lower end of the sleeve 17 are two outwardly eXtendedarms18, with their'outer edges of A wedge'shape, and these are so arranged that when the sleeve 17 is turned to one position, the'arms 18 will assume the position shown by dotted linesat 19 in Fgure 3, and when the arms '18 are turned to the position shown by solid lines in Figure 3, these wedge sur'faces engage 'and clamp adjacent portions' of the cable against the raised rbs 20 at the outer sidesof the body portion; 7

A pull upon the cable 14: in the direction of the arrow shown in F igure 3 will cause the wedges to firmly grip the cable, the gripping action of which increases as the tension upon the cable increases. V 4

`'Mounted-o'n top of the body portionisan upper gripping member 21, having an opening therein to looselyreceive the sleeve 17. This gripping member is formed with a groove 22 shaped substantiallylike the groove 13 and designed to receive the cable 14.

At the forward end of the clamping member 21, the outer rib, which forms the groove 22, is cut away so that the cable may extend beyond the gripping member.

nember to 'cooperate with the body 10, sulostantially like the gripping member 21,` and indicated generally by the numeral 23, and

'has a cable groove 24. It is rotatively mounted on the lower endof-the bolt 16, and a nut 25 and lock washer 26 are provided for gripping it against the body portion 10 and holding it in that position. u In some instances I find that the wedge looking device 17 and lS'is unnecessary, and

when that 'is not used, the device is operated First :the bolt is screwed 'upwardly until thei uppenclamping'member 21 has moved i to position 'sp aced apart from the body 10 'far enough topermit' the insertion of the cable into the grooves13 and 22 from the en- I- have also provided a second gripping 521,; the d of the cable.

i tire cireumference inwardly. That is to say,

the cable is simply w rapped about the clamping device until it enters the grooves and is' engaged by the post Then a block and tackle is applied to the end of the cable, shown at the right in Figure' 3, and the cable is drawntaut. When this has been done, the

bolt 16 is screwed down to firmly-hold the clamping member 21 against the body 10. Then the block and tackle is removedso that the-end of the cable isfree' Thisfree endis then bent downwardly over the end of the body 10, as shown at 27 in Figure 2, and'is wrapped around the clampingmember 23, in'

the same manner' as it was around the clamping member 21 before described,` .untilit is containedwthin the groove 24 and the corresponding groove onthe under side of? the body 10, as shown in Figure 2, andits free end may then be extended outwardly. Then thenut 25 is manipulated to `firmly` clanp' theclamping member 23 against the body 10.

, This forms :a clamp sutficient to hold 'the cable against strains to such anextent that the cable will break before it slips in the clamp., v

, In some'instances I prefer to have the end of the cableconcealed within the clampbetween the clamping member 23, and the *body 10, but where a longer cableend is desired,

the proj'ectingend may be tied tothe body portion ofthecable by a wire 28, or in any 7 other suitable manner;

When it is desired toagain Stretch the same 1 cable, this. may be done with my improved devicevery quickly and easily, because all that is necessary is to loosen the nut .25. Then" unwrap the endportion ofthecable from jbetweenfthe clamping members 232 and the 4: body-10, and then apply. a blockand tackle to the loose end of thecable,`and whenlthis has been done, thenit is only* necessary to loosen the bolt 16 a slight amount, suificiently to .permt 'the' block `,and tackle to V draw the cable through a groove between the clamping ' members 21 and 10, and when the tension has been properly' applied tothe cable, the bolt 16-is tightene'd and the end of the cable Secured in the same manner as before de:

scribed.

When it is desiredto use the wedge clamping device, itis not necessary to use the lower 'clamping member 23,`although this may be done if desired for the The operation of my clamping device when the wedge locking 'device is' used is the same asrthat before described, except ,that -the wedge is first placed in the position shown by dotted lines in Fgure 3'. Then after the cfable has beenstretched taut,*the` wedge member is moved to the position'shown by solid purpose of concealing j I have found in practice that the entire device may be manufacturedat a considerably less cost than'that for other articles now in use for the same purpose, and that' an operator can save considerable time by the use of my improved clamp over that required for other c1ampngdevices -now in use.

' 'I- claim, as my invention::

. 1, A cable clamp, comprising a body portion having a substantially fiat surface, a bolt seated' in the body' portion, a cable retaning poston said flat surface of the body, a sleeve rotatively mounted on the bolt, two wedges onthey endof the sleeve adjacent to'the body and 'soshaped that a cable may be passed around the bolt and thei posti' and be supported. by the post spacedapart fron the wedges and the bolt when-the wedgesare in one position,- andthat when thesleeve is turnedthe wedges will engage the adjacent sur-faces of the cableon ;both sidesof the bolt, a clamping member loosely mounted upon the r bolt. and 'formed 'with an .op enng 'through whichsaid sleeve is projected, 'and meanson one ,of the clamping members for opposing the outward movement of the cable when engaged by the wedges;

2. A cable clamp devicecomprising a body portion and two clamping n1embers'one on each side of the :body portion, a bolt passed through both clampingqmembers ,andhavng 'a screw threaded,connection withsaid body portion, and a nut on the end of the bolt'for drawing one v of the clamping ,members toward the said body, v said, parts 'being so shaped that a portion of :a cable; may be passed around one side of the? .body portion and then stretched taut, thengby turnng the ,boltoneof the clamping members may :be

drawn ,toward the ;body 'to clamp the cable, then the free endportion ofthe cable maybe woundaround the opposite side of thebody and finally by adjusting saidnut, the free end i each clamping member toward' the body por tion.- V r i DesMoi-nesil owa, J anuary 'O, 1931;J 1 ELMERsK. com

lines in Figure 3-, and then theboltlis tightu ened to clamp the member'21again`st the body

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