US410687A - Wire-guy gripper - Google Patents

Description

(No Model.)

J. GIBSON.

WIRE GUY GRIPPER.

Patented. Sept N. PEIERS, Phuloiunographer, Washingllm n. c.

UNITED STATES PATENT ()FFIcE.

JAMES GIBSON, OF KANSAS CITY, MISSOURI.

WIRE-GUY GRIPPER.

SPECIFICATION forming part of Letters Patent No. 410,687, dated September 10, 18 89.

Application filed March 21, 1889. derial No. 304,208. (No model.)

To all whom it may concern.-

' Be it known that I, JAMES GIBSON, a subject of the Dominion of Canada, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in IVire-Guy Grippers; and I do hereby declare that the followin g is a full, clear, and exact description of the same, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

My invention has for its object to enable the operating-levers to the grip-jaws to yield in such'a manner that the pull upon the guyrope may be maintained at an angle thereto, thus preventing weakening or bending of the rope at the point held by the gripping-jaws.

My invention consists in the novel construction and combination of parts, which will be fully described, and specifically pointed out in the claims.

In the drawings, Figure 1 is a plan view of the complete gripping apparatus, showing the position of the levers when extended, and the chain connecting the ends of said levers and a portion of a wire guy-rope between the j aws. Fig. 2 is a longitudinal side view of the apparatus as seen in Fig. 1, showing the position of the lever at an angle to the jaws of the grip. Fig. 3 is an end view of the gripping cam-jaws, showing the groove to receive the cable and the hasp 011 the pivot-bolts of the cam. 7

Similar letters of reference indicate corresponding parts in all the figures.

In the construction of my gripping apparatus, A represents the base or pivot plate, which consists of a flat bar narrow in width and of the proper length. Through the opposite ends of bar A and at a corresponding distance from each end are made the transverse perforations a a.

The grip-jaws of the apparatus consist of two flat circular cams B 13, equal in diameter and in size proportionate to the length of the plate A, so as to engage between the cams the wire rope, as hereinafter described. Through each cam B B is made a transverse perforation Z), eccentric to the line of circumference of said circular cams and so far re moved from the center of said cams as to per: mit the approach of said cams within the proper grasping distance. The size of said perforations h b is equal to that of the per- .forations a a in the plate A.

i Extending around a portion of the cams B B, and in the edges which are opposite to each other, are made the grooves U The cams are placed in line and secured upon one side of the plate A by means of pivot-bolts O C, which bolts are made to fit the perforations a a Z) Z; in the respective plate A and cams B B. Upon one end of boltO is made a screwthread 0. The bolt 0 is inserted through the perforation b in cam B, and also through the perforation in plate A, and upon said screwthreaded end 0 of bolt 0, beneath plate A, is fitted a nut c. The opposite end of the bolt 0 extends through and a short distance above the cam B, and is made with the bolt-head 0 which rests upon the cam B, and connected with and extending above the head e is a contracted end portion 0 of the said bolt, for the purpose hereinafter described. The pivotbolt 0 for the cam 13 is made with a fiat head or plate 0 upon one end not exceeding in width the plate A. The opposite end of bolt 0' is screw-threaded at 0 and this end of bolt C is inserted through the perforation I) in cam B, then through the perforation a in the plate A, and to said end beneath plate is fitted a nut 0 To the plate 0 forming the head of the bolt C upon the portion directed toward the head of the bolt 0, is hinged, by means of a hinge-joint (Z, one end of a hasp D. The opposite end d of the hasp D is bent near the bolt-head 0* at rightangles to form a depression (I of equal depth to recei ve the said bolt-head 0*. Through the end portion (1 of hasp D is made a transverse perforation (l of the proper size and in a position to receive the end 0 of the bolt 0. Through this end portion 0 of bolt 0 is made a transverse opening a, which, when the end portion'd' of the hasp D is upon the head 0 will pass in line with the upper and outer side of the said portion d, and in said opening is fitted a wedge 0 To operate the cam, two separate levers E E are employed, attached, respectively, to the circular edge portions of said cams B B by the stop-hinges b. In the ends of the levers E E, opposite to those hinged to the cams, are made the transverse perforations e e. To the perforated end of the lever E is connected one link f of a series of links F, and to the opposite perforated end of the lever E is connected one link f of a series of links E. The links in both series F F are then connected to an intermediate ring F to which ring is attached the block and tackle G.

In the operation of my improved wire-rope grip the levers E E are spread apart or thrown into the position seen in dotted lines, Fig. 1, and by this means the cams B B are turned upon the pivot-bolts C C, so as to increase the distance between the opposite gripping portions of the jaws or cams. In this position the wedge c is removed from the bolt 0, and

the hasp D turned back upon the portion 0 of the bolt 0. The cable H is inserted between the cams B B, and the levers E E are drawn toward each other, thus inclosing the wire cable within the grooves b 12 The hasp D is then closed and keyed to the bolt 0. It is then observed that as the resistance to the grasp of the cams B B upon the cable increases the cams are drawn more closely together and the grip upon the wire rope is increased in proportion and adouble purchase is attained. In the pull upon the wire rope, when several grippers are applied to the same rope, the hinged arms are especially serviceable, in that the combined drafts may be exerted upon the wire rope without twisting the strands or weakening the rope at any point. The movement of the hinged levers E E, to retain the proper purchase at an angle to the cams, is controlled by the stop-hinges b 0 Whenever it is desired to tighten the nut upon the bolt 0, a wrench is applied to the rectangular head c of the said bolt and said nut, the hasp controlling the movement of the opposite bolt C.

Having fully described my invention, what I now claim as new, and desire to secure by Letters Patent, is

1. In a gripping apparatus for wire rope having a base-plate, the combination therewith of cam-j aws consisting of opposite eccentrically-pivoted circular plates and operatinglevers rigidly connected laterally with said cam-plates, and hinged and arranged to yield in a transverse relation thereto, for the purpose described.

2. In a grip apparatus for wire rope having a suitable base-plate, the combination therewith of opposite eccentrically-pivoted grasping cam plates having pivot bolts onsaid base-plate, and a hasp connected with one of said bolts and adapted to be removably secured to the other bolt, substantially as described.

3. In a grip apparatus for Wire rope having asuitable base-plate, the combination therewith of opposite eccentrically-pivoted grasping camplates having pivot-bolts on said base-plate, (one of said bolts having a flat head or plate and the other bolt a contracted head,) and a hasp hinged to the said plate on the head of one of said bolts at one end, and having its opposite end provided with a suitable opening adapted to receive said contracted bolt-head and keyed thereto, for the purpose described.

JAMES GIBSON.

Witnesses:

S. L. C. HAssoN, G. F. I-IATHAWAY.

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