US1558392A - Wire-rope drilling clamp - Google Patents

Description

Oct. 20, 1925.

' 1,558,392 R. l.. PORTER WIRE ROPE DRILLING CLAMP Filed Nov. 2o. 1924 2 sheets-sheet 1 if nw@ Patented Oct. 20, 1925.

i UNITED STATES PATENT OFEmE.N

ROBERT LQPORTER, OF Los ANGELES, CALIFORNIA. j

` WIRE-ROPE DRILLING CLAMP.

Application filed. November 20, 1924. Serial No." 751,134. f

To all whom t may cof/wem: L 4

yBe it known that I, ROBERT L. PORTER, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Wire-Rope Drilling Clamps, of which the following is a specification. l

This invention relatesto well drilling outts and more particularly to wire rope or v'steel cable clamps used in) connection with the temper screws Ofstandard drilling rigs.

rlhe Object of this invention is to provide a cable clamp having friction means that continuously engage the cable in such a manner that thecable` may either be gripped or released, said means adapted to move with the cable when released so that the cable will not be damaged from contacting with relatively stationary surfaces.

Another'object is to` provide a clamp of the character referred to which is simple in construction, easily operated, and which may be quickly connected to the temper screws.

These Objects are attained by the disclosure herein set fortlr by the following description of the accompanying drawings, the novel features thereof being set forth in the appended claims, in which Figure 1 is a front elevation of the cable clamp connected to a 'temper screw.

Fig. 2 is a horizontal section taken on theV line 2-2 of Fig. 1.

Fig. 3 isa transverse section taken on the lines 3-3 of Figs. 1 and 2.

Fig. 4 is a transverse section taken on the line 4-4 of Fig. 2. j

Referring by numerals to the drawings, a cable clamp constituting the invention is generally designated at A, having clamping members lOrand 11. rlhe clamping member 10 has a jaw portion 12 in which is formed an opening 13 and a channel 14 connnunieating with the Opening. The channel has parallel sides 15 which are at right angles to walls 16 in theopening 13. The opening 13 has side walls 17 andan end wall 18 terminating in a tapered portion 19. The side walls 17 .have inwardly projecting Oifset portions 20 having horizontal surfaces 21 and vertical side faces 21', the vertical faces 21 being iiush with the side walls 15 of the channel 14.

Integrally formed on the jaw portion 12 is aniarm 22, a lug 23 andan ear 24.` recess 25 is formed in the lug 23 `and a vertical bore 26 extends through the lugon each side ofthe recess.` An aperture 27 is formed in the ear 24 to receive a link 28.

TheV clamping member 11 is ofsubstantially the same construction as the clamping member 10, having a jaw portion 12 in which is formed an opening .13l and a channel 14 communicating' with' the opening. The channel has parallel sides 15 which are at right* angles to walls16 in theopening 13. The opening.` 13 has side walls 17 and an end wall 18".ter1ninating in a tapered portion 19. The. side walls 17 have inwardly projecting offset portions 20 having horizontal surfaces 21 land `vertical side faces 21a, the vertical faces 21a being flush with the side walls `15` of the channel 14.

Integrally formed -onthe jaw portion 12 is an arm 22', lugs 29 and 30, and an ear 31 havingan aperture 32 adapted to receive a link 33. j j

Friction means adapted to engagea cable generally designated at C' consists of an endless link chain 34 carried by a member 35 and an endless link chain 34vcarried by a member 35. The chains 34y and 34 arehcomposed'of linksl L and L connected by pins, the links L having concave faces F` and curved ends E. The member 35 has parallel sides' 36, a curved top 37 and a fiat bottom 38. In a like manner, the member 35. has parallel sides 36', a curved top 37 and a flat bottom 38. The member 35 is mounted in the opening 13, the bottom 38 resting on the surfaces 21 and-the chain 34 carried by the member 35 engaging thesides 15 of the channel 14. The chain'34 and the member 35 are mounted in the opening 13 and channel 14 in the same manner as the chain 34 and member 35. The chains 34 and 34- are lpressedinwardly by `leaf springs 39 engaging the members 35 and 35. An eye bolt 40 lits in the recess 25 in the lug 23. The lug 23 of the clamping member 10 and the lugs 29 and 30 of the clamping member 11 overlap' andare pivotally connected by a pin 41 passing through the bore 26 inl the lug 23 and bores 29L and 30a-in thelugs 29 and 30v and a hole 40LL in the eye bolt 40.

A nut 42 having` an' annular groove 43 engages the threaded end of the eye bo-lt 40, and a collar 44 engages the groove 43 and is connected to the arms 22 and 22 by links the leaf springs 39 through the members 35 and 35, the concave faces F of the links L conforming to the diameter of the cable,

and the links L engaging the sides of the channels 14 and114. As clearly shown in F 2, the cable is grippedby the clamping members 10 and 11 at which time the meinb'ers 35 and y35 are pressing against the chains 34 and 34', this pressure being effected by rotating the nut 4l to the right.

Then it is desired to release the cable, the nut 41 is turned to the left, which will cause the jaws t-o open, thereby releasing the `tension on the cable, the chains, however, remaining in contact with the cable due to the action of the leaf springs 39, and ivlieiftlie cable is moved in either direction the chains will move with` the cable over the members 85 and 35.

lt will be noted that the endlessk chains present considerable surface. engaging the cable and move with the cable (when not gripped), thus preventing damage and wear on the cable.

Various changes may be made without departing from the spirit of the invention as claimed.

That -is claimed is:

1. A cable clamp comprising a pair of pivotally connected clamping members` said` clamping members having jaw portions.l each of said jaw portions having an opening, an endless link chain mounted on a member movable within each opening, eX- pansion springs within each opening engaging each member, and means for opening and closing said jaws. I

2. Acable clamp comprising a pair of clamping members, each of said clamping members having jaw portions, arms projecting froii said jaw portions, a pair of lugs formed on oneof said jaw portions and a single lug formed on the second jaw portion, said second jaw portion having a recess vithin said lug, an eye bolt mounted 'within the recess of said second jaw portion, said eye bolt having a nut mounted on the threaded portion thereof, a collar carried by said nut, links connecting said collar andy said arms of the jaw portions, said lugs of the jaw portions inter-locking, a

vpivot pin extending through the bores in said lugs and eye bolt, each of said jaw portions having'an opening, a channel cut in the inner side of each jaw portion and communicating with said openings, a member movable within each opening, link cha-ins mounted on said members, expansion vsprings engaging said inembei's, an ear formed on each of said clamping members, an opening formed in each of said ears, and a link in each of said ears adapted to support the cable clamp on a temper screw.

3. A cable clamp comprising a pair of clamping jaws, members slidable upon said jaws, and endless chains passing Aaround said members adapted to engage upon a cable;

4. A cable clamp comprising a pair of clamping jaws, members slidable upon said jaws. endless chains passing around said members adapted to engage upon a cable, and spring means for urging said members toward each other.

5. A cable clamp comprising a pair of clamping jaws, members slidable upon said jaws, yand endless chains passing around said members. said members beingso arranged that when the adjacent sides of said endless chains are clamped upon a cable, said members will cooperate with their respective jaws to clampv the remote sides of said endless chains therebetween.

6. A cable clamp comprising a pair of clamping jaws, members slidable upon said jaws, endless chains passing around said members, said members being so arranged that when the adjacent sides of said endless chains are clamped upon a cable, said members will cooperate with their respective jaws to clamp the remote sides of said endless chains therebetween, aiid spring means for urging said members toward each other.

7. A cable clamp comprising two jaws and an eye-bolt pivoted together, arms carried by said jaws and disposed at the sides of the eye-bolt, a nut threaded onto the eyeboltJ1 a collar upon the nut, and links connecting said collar tosaid arms, whereby movement of said nut will cause said jaws to be clamped together or to be separated from eac-h other.

S. In a cable clamp, a pair of jaws, members movable upon said jaws, and endless chains passing around said members and being so arranged that when the adjacent sides of said chains are clamped together upon a cable` other portions of said clamp will'also be clamped between said members and portions of their respective jaws.

In testimony whereof I have signed my name to this specification.

R. L. PORTER.

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