US1192065A - Cable-grip. - Google Patents

Description

, V. H. JACKSON.

CABLE GRIP. APPLICATION FILED NOY- 3. 1915.

Patented July 1916.

j V. H. JACKSON VILAS H. JACKSON, on CLEVELAND, OHIO.

IllllH CABLE-GRIP.

Specification of Letters Patent.

- Application filed November 3,1915.

To all whom it may concern:

Be it known that I, VILAS H. JACKSON, a

citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have inven ed "certain new and useful Improvements in ablerGrips, of

which the following is a spe 'fication, refer- T ence being had to the accom ings.

Thisinvention relates to an improved has for its primary object to anying drawcable grip and provide a cable grip which maybe easily and quickly attached to the cable. section connected to the load, nected to the drum cable so thata pull upon the latter cable will constantly act to more tightly retain the grip in its applied position.. j

It islg provid, a cable partsbf which gripping device, the several are so constructed and arranged that the grip will withstand very 1 severe usage without injury to the parts thereof or, in any Way, afiecting their operation/in subsequent use.

In gi ts more specific aspect, the invention.

contemplates the provision of a plurality of cable; gripping jaws having means for interlocking engagement with each other, means said grip beingicon-v another object of my 'inventionto having sliding wedging action upon said aws to force the same into gripping en-. gagement upon a cable,

connected to the latter means and operated by a pull upon the drum cable to force the jawfs into gripping engagement with the connected cable.

, ihe invention has foranoth'er important object to providesimple and reliable means for' holding the several gripping assembled relation and preventing their relative shifting movement when out ment with the cable: I The invention has for a further general object to provide a. device of the above character which may be advantageously "employedas acable grip in the pulling of tree stumps, as-well as mining, bridge building, and various other engineering operations. i

With the above and other objects in view, my invention consists in the novel features of construction, combination and arrangement of parts to be hereinafter more fully described, claimed', and illustrated in the accompanying drawing, in which,

Figure 1 is a plain view illustrating the and actuating levers jaws in v of engageexcavating, v

section taken on the line length of the jaw.- edge of the a cylindrical socket 12 Patented July as, 1916. Serial No. 59,413.

preferred embodiment of myrimproved cable grip; Fig. 2 is aside'elevation thereof; F ig; 3 is a horizontal section; Fig.4 is a 4+4efg1 1ig 3';and Fig/5 is a perspective view of= one of the gripping jaws. i

designates the cable gripping vjaws which are of practically the same form and conmum thickness at its center and heiinglongiends ofsaid bar on its exterior face, as in- Tile- 3511i us of arcuate cross--' sectional 'form h a ving a niaximufn width of 90. The inner face of the jaw extends in a continuous line and has spiral corrugations 7 cut therein which extend throughout the Upon each ldngitudinal jaw. spaced rectangulzuteeth 8 are formed,- and the teeth on the edgcs of the several jaws are so related with respect tothe teeth on the adjacent jaws that said teeth will have inter-fitting engaggi cnt with each other. At the the jaws 5, the inner end edge thereof is rounded or convex, as shown at 9, so that the cable may be readily threaded through the assembled jaws. ()ne pair of thc jaws 5 which are diametrically opposed to each othergare provided in their outer faces and adj acent-to their opposite endswith;the longitudinally extendinggrooves or channels 10 for a purpose which will 'mate center with a transversely :exgtending center of said groove, is formed inthe jaw.

.hegrooves 11 receive a ring or collar 13, and in each of the sockets 12 a coilsiiring 14' groove 11 and, at the 11s arranged. These springs acting upon the collar 13 andthe respective jaws, apt to hold the jaws out of frictional contact with the cablewhcn the jaws have been released from their, gripping engagement upon saidcable.

Upon the tapering end portions ofthe jaws 5, the longitudinally slidingfqpnes 15 are engaged. Each ofthese cones is formed eferring in detail to the; Iluawing, 5-

t'udinally taperedor inclined to the. opposite opposite end of each of upon its opposite sides with the outwardly projecting, spaced cars 16. In the ears on one cone, pivot bolts 17;are' engaged; Upon these pivot bolts, the inner ends of Elie levers 18 are loosely mounted. a Links l9 are pivotally connected at one of their ends, at .20,

in l

to the respective levers 18 adjacent the pivot 17 thereof, and the other ends of said links are pivotally engaged upon the bolts 21 tonnecting the spaced ears 16 of the other cone 15. In each of the cone members between the spaced cars 16 thereon, a set screw 22 is threaded, and the inner ends of these set screws are engaged in the grooves or channels 10 of the opposed jaws 5.

To the outer ends of the levers 18, clevis rods or links 23 are pivotally connected, the other ends of said links being connected together by a clevis bolt 24 upon which the ends of the clevis 25 are engaged. To this clevis 25, the drum cable, indicated at C, is

adapted to be connected. C designates the cable which is connected to the load.

In the practical operation of the device, cable 0 is slipped through the grip longitudinally between the jaws 5, said jaws being in their released positions as indicated in dotted lines in Fig. 1. When the winding drum is operated, the cable C will be wound thereon, and the levers H will be pulled to the positions indicated in full lines in Fig. 1 so that the cones 15 will be shifted inwardly upon the relatively thick central portions of the jaws 5 in opposite directions and said jaws thus forced inwardly to cause the corrugated inner faces 7 thereof to securely grip upon the cable. It will be readily seen that the greater the load and, therefore, the power which is required to pull the same, the greater will be the gripping pressure of the jaws upon the cable through the medium of the levers 18 and links 19. The gripping device may be attached to the cable C at any point along its length in spaced relation to the load, so that the drum can be started empty, and injury to the cable or drum thus obviated as sometimes occurs through overwinding. The load may be attached to or released from the device very quickly. Owing to the provision of the set screws 22 in the cones 15 which bear against the base walls of the channels or grooves 10, said cone members will occupy corresponding positions upon the opposite ends of the jaws 5, their outward longitudinal movement upon the jaws being limited by the set screws. The screws also serve to maintain the jaws 5 in their proper relative positions and prevent turning or rotative movement of the same within the cones 15.

As previously noted, the jaws, when released, are held out of frictional engagement with the cable by the springs 14 while the ring or collar 13 prevents relative longitudinal movement of the j aws, Thus, it will be seen that each of the jaws has precisely the same gripping effect upon the cable, said jaws operating in the manner of an expanding and contracting cylinder on all parts of the circumference of the cable, the pressure being equally distributed throughout the length of the aws. As the mechanical construction of my improved cable grip is quite simple, it will be seen that the device is extremely durable and capable of withstanding the severe use to which such devices are ordinarily subjected. It will be manifest that the size of the jaws and the internal diameterof the cones may be considerably varied so as to enable the grip to be applied to cables of different sizes.

From the foregoing description, taken in connection with the accompanying drawing, the construction, manner of operation and several advantages of the invention will be clearly and fully understood. In the drawing, I have disclosed what I believe to be the preferred form and relative proportions of the several parts; but it will-be understood that I do not desire to be at all restricted in this respect as various changes may be necessitated as the particular exigencies of the case, encountered in the use to which the device is to be applied, may indicate to be desirable. I desire it also to be understood that, while I have above referred to a certain relative arrangement of the several cooperating elements, the invention might also. be produced in other modified forms and I, therefore, reserve the privilege of adopting all such legitimate changes as may be fairly embodied within the spirit and scope of the invention as claimed.

Having thus fully described my invention, what I desire to claim and secure by Letters Patent is 1. A cable grip including a plurality of gripping jaws each having its outer face inclined, opposed relat vely slidable elements engaged upon the inclined faces of the jaws, operating connections between said elements, and means connected to said operating connections to actuate the same and simultaneously shift said elements upon the relatively stationary jaws to force the jaws into gripping engagement upon a cable arranged between the same.

2. A cable grip including a plurality of jaws having their outer faces tapered from the center of the jaw to its opposite ends. cones slidably engaged upon the tapering end portions of said jaws, levers connected to one of the cones, means for connecting gaid levers to a pulling cable at their outer ends, and links connecting said levers adjacent their other ends to the other cone. whereby said cones are moved inwardly upon the jaws in the operation of the drum to simultaneously force said jaws inwardly into gripping engagement upon the cable.

3. A cable grip including a plurality of jaws having their outer faces tapered from the center of the jaw to its ends. cones slidable upon the tapered end portions of the and means carried by tions of and. operating connections jaws, the inner faceof other for relative movement toward or from each other upon the jaws, actuating means connecting the latter means to a. pulling cable whereby the cones are moved inwardly upon the jaws by the pull of said cable and the jaws forced inwardly into gripping engagement with a second cable,

' each of the cones cooperatively engaged with the opposed jaws to limit the outward sliding movement of the cones and also prevent turning movement of the jaws avithin said cones.

at. A cable grip including a plurality of jaws each having itsouter face tapered from the center of the jaw to its ends, cones slidable upon the tapered end porthe jaws toward or from each other, between said cones to simultaneously shift the same inwardly upon the jaws'toward each other and exert aradial pressure upon the relatively stationaryjaws to cause the same to grip upon a ,cablearranged between said aws.

5. A cable gr p including a plurality of jaws having-their outer faces tapered from v the center of the'jaw to its ends, cones slidable upon the tapered end portions of the" aws, means connecting the cones toeach other for relative movement upon the jaws, means for connecting the latter meansto a pulling cable whereby the cones areimoved inwardly upon the jaws cable and the jaws forced inwardly into gripping engagement with a second cable, means carried by each of the cones cosperatively engaged with the opposed jaws to limit the outward sliding movement" of the cones and also prevent turning movement of the jaws within said cones,'and additional means forholding the jaws out of frictional contact with the cable when the cones are moved to their released positions, and also preventing relative longitudinal shifting movement of the jaws.

G. A cable grip including a plurality of jaws having their outer faces tapered from the center of the jaw to its ends, cones slidably engaged upon the tapered ends of the each jaw being transversely grooved at its center, a collar seated in said grooves to prevent relative longitudinal shifting movement of the jaws when opposed v ter and in its simultaneously to force the jaws into M ping engagement upon the cable, and means,

by the pull of said each (having tapered from its center to upon a cable arranged between the'sameki Y 10. A cable grip including-a plurality of having means on their longitudinal;

dinally slidable the jaws, means for said grooves through which a cable is adapted to be engaged, each jaw having a socket centrally located at the base 'of'the groove, a. spring arranged in said socket and bearing againstsaid collar, said springs operating to hold the jaws out of frictional Y engagement with the cable in the released positions of the jaws, said collar preventing relative longitudinal shifting movement of the jaws, and means for operating the cones. simultaneously to force the jaws into gripping engagement upon the cable.

8. A cable grip including a plurality of jaws having their outer faces longitudinally tapered from the center of the jaw to its opposite ends, cones slidably engaged upon the tapered ends of the jaws, each ofsaid jaws having a transverse groove at its ceninner face, a collar seated in said grooves through which a cable is adapted to be engaged, each jaw having a socket centrally located at the base of thegroove, a, spring arranged in said socket and bearing against-said collar, said springs operating tohold'the jaws out of frictional engagement with the cable in the released positions of the jaws, said collar preventing relative longitudinal shifting movement of the jaws, means for operating the cones st r carried by each cone cooperating with the opposed jaws to limit the outward sliding movement ofqthe cone upon the jaws.

9.:Acable grip including opposed jaws its outer face longitudinally its opposite ends, longitudinally slid'able elements engaged upon the tapering end portions of said jaws,

means preventing relative longitudinal shifting movement of the 'jaws, and means operatively connecting saidfelementsito it simultaneously shift the 'sam'efinwardly toward each g the aws radially into gripping engagement jaws edges for interlocking other, theouter faces of said jaws being longitudinally tapered from the center of other upon the jaws andforcef 1 engagement with; each the jaw to its oppositeends, cones-longitu- T upon the tapering ends of the. jaws, and means for operating the cones posed between said jaws.

11. A cablev grip including a plurality of jaws having teeth ontheir longitudinal edg'es,the outer Y faces of saidjawsbeing tapered from the center of the jaw to its opposite ends, cones slidable upon the tapered end portions of simultaneously to force the jaws into interlocking engagement with each other and" corrugated inner faces and operating the cones simultaneously to force the toothed edges and prevent a rotative movement of the jaws of the jaws into interlocking engagement therein. 10 with each other and the corrugated faces of In testimony whereof I hereunto affix my the jaws into gripping engagement upon *ignature in the presence of two- Witnesses.

5 a, cable disposed between the jaws, and VILA S H. JACKSON.

meanscarried by each of the cones and co- "Witnesses: opemtmg wlth the opposed ews to hunt JOHN D NN, the outward slldmg movement of the cones GUY E. LLOYD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G.

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