US917718A

US917718A - Clamp.

Info

Publication number: US917718A
Application number: US45924908A
Authority: US
Inventors: Samuel B Derby
Original assignee: WILLIAM J WALL
Current assignee: WILLIAM J WALL
Priority date: 1908-10-23
Filing date: 1908-10-23
Publication date: 1909-04-06
Anticipated expiration: 1926-04-06

Description

S. B. DERBY.

CLAMP.-

APPLIOATION `FILED 00T..23, 1908.

PatentedApr, 6, 1909 UNITED STAT- ES PATENT OFFCE,

SAMUEL B. DERBY, OF NORTH lONi-UVANDA, NEW YORK, ASSIGNOR OF ONE-HALF TC WILLIAM J. WALL, OF BUFFALO, NEW YORK.

CLAMP.

No. 917,718. Specification of Letters Patent. Patented April 6, 1909.

Application filed October 28, 1908. Serial No. 459,249.

To all whom it may cen/cern: each other for clamping and tightening the Re it knownthat I, SAMUEL E. DERBY, a l cable by a flexible clamping rope D which citizen of the United States, residing at passes centrally through an eye d in a lug d North Tonawanda, in the county of Niagara l on the under side of the lower clamping i member C at its rear end, and has its ends t) i wound in opposite directions around the and State of New York, have invented a new and useful improvement in Clamps, of which the following is a specification. i clamping members, crossing each other on This invention relates to improvements opposite sides of the clamp. The ends of in clamps in which parallel opposing clampthe clamping rope extend beyond t ie front ing members are employed which are adaptend of the clamp, passing over and suped to engage a cable, or other article to which ported by laterally-extending ears E formed they applied, on opposite sides thereof on opposite sides of the upper clamping and clamp the same between them. member B at its forward end, and terminate The obect of this invention is to provide l in eyes F which are adapted to be connected a clamp of this character of simple construcwith the source of power which is to be api' tion, which will firmly and securely clamp i plied to the clamp, the cable without bending or unduly comi rlhe .clamping rope is preferably crossed pressing any part thereof, and in which the l adjacent to the lug d to give the rope a force applied for drawing the clamping membetter' grip upon the clamping members and bers together into clamping engagement prevent it from slipping in the eye d, but with the cable, is exerted equally upon both this arrangement is not necessary. Further, members, and there is no endwise movethe rope may be wound a greater number ment of either member relative to the otherI of times about the clamping members than along the cable during the clamping operais shown in the drawings without departing tion, thus preventing any disarrangement of from the invention, and in the place of the L' the parts of the cable by the clamping memsingle-clamping ropes, two ropes may be bers. substituted if desired, having their inner In the accompanying drawings: Figure l, ends attached to the eye d of the lower is a side elevation of a clamp embodying the clamping member and wound about the invention. Fig. is a plan view thereof. clamp in opposite directions, similar to the fi4 Fig. 3 is an elevation of the rear end of the single rope. clamp. Fig. 4 is a similar view of the front When the tightening strain is applied to end thereof. the outer ends of the clamping rope, this Like letters of reference refer to like parts strain is communicated by the rope equally in the several figures. to the outer faces of both the upper and ff A represents a cable, and B and C the opn lower clamping members and draws these posing members of a clamp therefor which members toward each other into clamping extend lengthwise of the cable and engage engagement with the cable without moving the same on opposite sides thereof. For the either member relatively to the other memsake of clearness in description, the members B and C will be termed herein the upper and lower clamping members, respectively, as they are shown in the drawings in this position, but it is obvious that these members may be arranged in any other suitable position about the cable, as may be desired` These clamping members are preferably semi-cylindrical in cross-section and are arranged with their inner flat faces adjacent to each other, these faces being provided with central longitudinal grooves or channels b and c which are adapted to receive and partially embrace the cable for holding the same in position between the clamping members. The clamping members are drawn toward ber lengthwise of the cable, and the greater ft the strain, the more firmly do the clamping members grip the cable.

Tie clamp is especially intended for use upon electric power cables which generally consist of a plurality of small conducting wires which are wound in different directions about a central core. character, the clamps heretofore used either engage only a short length of cable and tend to kink or bend the cable under strain, causing the wires of the outer winding to separate and forcing the inner wires outwardly between the same, or permit of endwise movement of one clamping member relative to the other along the cable and 1.1.3

On cables of this thus cause a displacement and disarrangement of the Wires of the outer Winding. TWhen once forced apart and disarranged, it is practically impossible to return the Wires of the cable to their original position and straighten the cable, and as these clamps are generally applied to cables intermediate of their ends, such disarrangement of the Wires and bending of the cable is very undesirable. rThe present construction overcomes these difliculties by engaging a sufficient length of cable to prevent hinking or bending thereof, and by communicating the strain equally to both clamping members so that there Will be no cndWise movement of either member relative to the other.

To release and remove the clamp from the cable, it is only necessary to unwind. the clamping rope when the members may be separated and removed. For convenience in holding the two members together in handling tlie'clamp when not in use, they are preferably connected on one side by a link G Which passes loosely through lugs or ears g on adjacent sides of the upper and lower clamping members, but any other connection which does not interfere With the clamping movement of the members may be used for this purpose, or such connection may be dispensed With altogether if desired.

l claim as my invention:

l. A clamp comprising longitudinal clamping members adapted to engage opposite sides of a cable, and llexible connecting and tightening means connected with said clamp and extending along and around said clamping members and adapted, under strain, to draw said members toward each other and against the cable, substantially as set forth.

2. A clamp comprising longitudinal clamping members adapted to engage opposite sides of a cable, and flexible connecting and tightening means composed of tWo lengths of rope which are connected with said clamp and extend. along both clamping members and around the same in opposite directions, substantially as set forth.

3, A clamp comprising longitudinal clamp ing members adapted to engage opposite sides of a cable, flexible connecting and tightening means composed of two lengths of rope which are connected with said clamp and extend along both clamping members and around the same in opposite directions, and means on said clamping members for holding said rope in position thereon, substantially as set forth.

4. ln a clamp, the combination of longitudinal clamping members adapted to engage opposite sides of a cable, one of said members being provided at one end with attaching means and the other member at the 0pposite end With supporting means, of two lengths of rope which are attached to said attaching means on one of said members and extend along both members andy in opposite directions around the same and bear Vwith their free end portions u. on said supporting means of the other mem er, substantially as set forth.

5. In a clamp, the combination of longitudinal clamping members adapted to engage opposite sides of a cable, one of said members being provided at one end With an attaching lug and the other member being provided at the opposite end with laterally-projecting supporting ears, of two lengths of rope which are attached to said lug and extend along both members and around the same and bear with their free end portions upon said ears, substantially as set forth.

Witness my hand this 17th day of October, 190s. Y

SAMUEL B. DERBY.

Witnesses:

E. C. HARD, C. B. HORNBECK.