US1653693A - Cable puller - Google Patents

Description

Patented Dec. 27, 1927.

UNITED ysrisres 1,653,693 PAT*ENTi oFFICE.

nioHARD B. Brumes yAND mians'nnwnnn o'rootn, or Urrea. new vonk.

` CABLE PULLER.

` A pp'ncaubn fued June s,

This invention relates to a cable puller of v the type `adapted to be readily attached to and detached from cables or wires even.

where a free end of available.

The purpose of our invention is-to provide a cable puller of the type describedfof j new` and improved construction and one which is simple but'reliablein operation.

A further purpose is to provide a cable puller of thetype mentioned of such construction, combination and `Cooperation of its parts as willenable the device to be safely used even wherea tension of manyjthoul5 sand pounds has to be placed upon the cable being drawn tight by the cable puller. Due to the leverage used in the tool to grip the cable for such a pull much `f greater strain is placed upon some parts of the tool than upon the cable and it is the purpose of our invention to provide what may be called a heavy duty puller that will stand the strain of such use without injuring the cable and ywithout breaking, straining or distorting the tool. Y i

Another purpose is to provide arheavy duty cable puller whichcan be satisfactorily and readily used without change or adjustment of its parts upon cables of more than the cable or wire is not one diameter,

Further purposes and objects of our invention will appear from the specification and claims herein. j

Fig,V 1 is a plan view of a cable puller embodying our invention with the jaws and cam levers shown in extended or open po- Sition. j

Fig. 2 is a plan view of the near or front side of the tool shown in Fig. 1.

Fig. 3 is a plan view of the device shown in Fig, '1 with .the jaws closed and engaging a section of cable but with the retracting arms removed in order to more closelyshow certain other details, ofconstruction,

Fig. 4 is avertiealsectiona'l view on line 4--4 of Fig.` 8. 5 isa plan view of the connecting link.v Fig. Gis a planview of one of the `retracting arms.

Referring to the drawings in a more par- ,tisular description it willV befseen that the device comprises a. connecting link 10,;a pair of generally similar jaws 1111 and a pair of ,Similar `earn levers `12W-12, i

`The connecting link 10 vis arelatvely wide, heavy member 4constructed ,of Amaterial 1927. 'serial No. 203,827.

well adapted to stand -the strain to be placed thereupon. It is provided at its op-` posite ends with `a vertically disposedlholef 13 through which extends `the pivot pin 14 connecting each end of the linkto the forked ends L15 and 16`of the camlever'l-Q. j j The jaws 11-11 are provided interme-v diate their llength and intermediate their vertical height with a transverse slot 1'? the width and ,especially the height of which is alittle greater than the width and height respectively of the link-10. This excess of height in the slots over the height or thiekl` ness ofthe link allows the jaws to swing a` slight amount either way from a position right angles to the lengthwise planeof the link Aso'that the toolmay be applied to lseveral varying sizes of o a-ble or *wire without putting a twisting or bending strain upon ythe link. v

The jaws l1 are of considerable length say about three times the width of the con-y necting link 10v and inthe opposing faces 17 of the jaws to one side of the link 10 there is provided in .each aw a longitudinally eX- tending cable-engaging groove118. These grooves are concave of a "curvature to adapt the yjaws to engage a cable or `wire of the` sizeffor which fthe Vtool is adapted around a considerable ysurface of the cable so as to increase the area of the lsurface engaged bythe tool and prevent distortion or marring ofthe cable'. A f

As the tool is illustrated in the drawings these cable-engaging grooves 18 are shown ofthesegrooves and of the cable belowthe link 10 but it will be obvious `that when de sired the tool may be applied bodily from the lower side ofthe cable and so bring the tool in a position reverse to that shown in the drawings. In other words,`the location lof these grooves and of the cable below the link is simply for the purpose of definite ness in describing the tool.` Preferably the opposing faces of th'e ja-wsare so Vshaped as to have the lip '19 below the groove 18 cut away or formed back from the general plane of `the opposing faces 1f( and also rounded as j shown on their lower sides as at 20 lin order yto more rreadily allow the tool to beapplied to thec'able and sothat" the relatively short range of movement of the aws towards `each other will `more quickly and effectively obtain a v.gripping contact upon thecable.

To the other side of the 'llink that is to brought together. i

of said link as the partsy are; shown 4 ofthe drawings theirighth and projecting ridge the top in Figs. l to jaw is provided Vwith a` 21 extending the leugth ofsaid jaw rounded orl'curved at its outerpartrffornr-l which the tool j. is .i adapted the 1 cable i will be gripped between the two grooveslSg toene side of the link and ridge2l at the other sideof the link; will engage the opposing surface of the left hand jaw along the groove 23. It` will be understood that the ridge 2l and other parts v of the ftool are so proportioned that whenthe'toolis,appliedito al cable of the average size `for whicliit is adaptedto be used thevertical plane of the twojaws will be maintained iii-position about as shown inlligs.` 2 and 4. When `the tool is applied tofa largersized cablethe jawseven when closed upon the cable will rock to slightly divergent planes/with the upper engaging surfaces of the two jaws forming the fulcrum point for the said jaws. i When the tool is applied toacableiofa smaller size" within the rangei allowed, thegtwojaws willrock upon these same faces 22y and23 as fulcruin points ,but `'with the-lower parts of the-jaws somewhatlcloser together than shown in? Fig. 4. ,It willbe seen that in anyofthese three positions the pressure communicated to the jaws lay.` the j cam faces24 of the cam levers l2 is transmitted fto, the cable i without plac-V ing a bending strain upon thelinlrlOj.`

Theinnerlendsof-thecain levers 12A are forked asgmostplainly showninFig. 2 and through `the two"forked)ends` of each lever extends the pivot .i pinlxlelforsaidilever. Upon both the upper and lower forks :of each lever are providedfthe camzfaces 24. These cam faces are farther froin ;the-axis ofthe pivot as .theforlrs are .seen ingEig. 2 so that as the cainyzlelveiS.n l2 have their outer ends l drawn forwardirelative gto jthejzjaws the said jaws `will loeforeed together ing an obvious manner with great power,- upon i the, cable `to be grippedthereby. uBreferabljr@the part of the outer` sides `25 ofethe twojaws wherefsaid sides are 1togengagevtheiearn` faces 24 will be curved inwardly forming` aicamfengaging waj7 26. kThese pain-ways 26. "are concave followingnas close as practicalile to thefcurve of the cam faces 24 sol'that the pressure transmitted tofthejaws from the-cam faces `.will bej'distributed -over an appreciablefsur- V65 face and not' to a line as would" be the case pinda towardsthe front of the forks ifthe cam-waywas left flat..I In this way wear of the parts `isillargely evoided and the life of the tool is prolonged.

i Means are provided to` autolnaticalljT and positively` retract 1 th'eljaws "to openil position bythe `moving of the cam levers back to open", that is extended position.

These meanswcoinprise an arm 27 secured to each jaw and projecting outwardly past the outer side 25 of the 4jawand thereprovided with a depending finger 28whichl engages thej eccentric curved shoulder' `29 -on` cular formed in the top of the uppenforlred end of the cam lever 12. Thepo'sitionbf the two fingers 28 is indicated in dotted lines inFig. and it will be obvious thatupon the cani `levers ,being swung hack to` open pos tion` the .pins riding along `the shoulderi 29 will be drawn bach closer to,` the `:a3ri`sf`of the pivot pins lll and so wilrl'draiv the` aufs away from each other to theposition `ef the parts shown in `Fig. 1. For conveniencein manufacturing Ithe `device these retractingfalrnis 27 will preferably parts from the jawsbut readilyandrigidljr secured thereto by means of screws tending through the arms into thejaws. The portion of the arms over thejjaws maybe eountersunl: more or less into the iippersur; face offthe jaws. i v

`Suitahlemeans suoli as a, long "clevis or draw bardor loop `3l` is pivotally connected de of a recess 30 convenientlj7 eir`-` bevforined as separate to the outer end of each cam lever `for con` i necting `the `toel to `the hooi; df'thfe tackleblock orothersource.ofpower. j f i Underjcertainworlring conditions it is au advantage to have the `tool autoxnaticalljv grip the cable with a moderate pressure" as scones the cable and tool j are brouglftto gether and without waiting "for the drawing power tobe appliedto thecaiu levers. "STO aceoinplishthis we `provide the tool with 'a tension spring32 having its ends connected (preferably` detaehably): to the cam ;levers`, The tension and length ofthe springfare such as `to normally yieldinglwv` :draw-the levers more oriless to the closed position and the tension nof-tine spring upon the levers is sufficient toi hold the `tooljin Vplace uponi the l cables. .lVhen the tool equipped with `'such a springislto be appliedto a;:ca ble the are temporarily straightened orfopened "out against the tensiom of fthe spring.

readily` detached freni the.ftoolljY j What we claii 4fas newfand desire by Letters Patent is j "hln a" cable puller to `seeure levers o this feature. is not" desired thefspring is I thecoinbinatio -ojfa j connecting" linlnga` pair "of"` jawsfslidahly themotlier side of said linlr alcofoperating o face which faces areadaptetl'fto meet each and each having a cable-engaging groove to one side of said link a'iid having at the other faces are adapted to meet each other and form fulcrum faces when a cable is engaged by the tool and cam levers pivoted to the opposite ends of said link and having cams engaging the adjacent jaw and operating to move the jaws together as the outer ends of the levers are drawn forward.

3. In a cable puller the combination of a connecting link, a pair of jaws slidably mounted intermediate their ends on said link and each having a cablc-engaging surface to one side of said link'and having at the other side of said link a co-operating rocking face, which faces are adapted to meet each other and form fulcrum faces when a cable engaged by the tool and cam levers pivotcd to the opposite ends of said link and having cams engaging the adjacent jaw and operating to move the jaws `together as the outer ends of the levers are drawn forward.

41. In a. cable puller thecombination of a connecting link, a pair of jaws Vslidably mounted intermediate their ends on said link and each having a cable-engaging groove to one side of said link and having at the other side of said link a co-operating rocking face, which faces are adapted to meet each other and form fulcrum faces when a cable is engaged by the tool, and cam levers pivoted to the opposite Vends of said link and having cams engaging the adjacent jaw and operating to move the jaws together as the outer ends of the levers are drawn forward.

5. In a` cable puller the combination of a connecting link, a pair of jaws slidably mounted intermediate their ends on said link and each having a. cable-engaging groove to one side of said link and having at the other side of said link a cooperating rocking face, which faces are adapted to meet each other and form fulcrum faces when a cable is engaged by the tool, cam levers pivoted to the opposite ends of said link and having cams engaging the adjacent jaw and operating to move the jaws together as the outer ends of the levers are drawn forward and means side of said linka co-operatmg face which connected to the outer ends of said cam levers for drawing their outer ends forward.

6. In a cable puller the combination of a connecting link, a pair of jaws slidably mounted intermediate their ends on said link and each having a cable-engaging groove to one side of said link and having at the other side of said link a co-operating face, which faces are adapted to meet each other and form fulcrum faces when a cable is engaged by the tool and each having on its outer side a curved cam-engaging way and cam levers pivoted to the opposite ends of said link and having cams engaging the cam way on the adjacent jaw and operating to move the jaws together as the outer ends of the levers are drawn forward.

7. In a cable puller the combination of a connecting link, a pair of jaws slidably mounted intermediate their ends on said link and each having groove to one side of said link and having at the other side of said link a co-operating face which faces are adapted to meet each other and form fulcrum faces when a cable is engaged by the tool, cam levers pivoted to the opposite ends of said link and having cams engaging the adjacent jaw and operating to move the jaws togetheras the outer ends of the levers are drawn forward, and yielding tension means operatively connected to yieldingly draw the jaws together.

In witness whereof we have affixed our" signatures, this 28th day of June, 1927.

RICHARD B. BILLINGS. JAMES EDWARD OTOOLE.

a cable-engaging

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