US1060386A - Cable-clamp. - Google Patents

Description

M. WAGHTEL.

CABLE CLAMP.

APPLICATION FILED JULY 22, 1912.

1,060,386. Patented Apr.29,1913.

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MAX WACHTEL, 0F DONOBA, PENNSYLVANIA.

CABLE-CLAMP.

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clamp to slip or lose its hold. The clamping force or pressure is derived from the cable drawing stress or pull, and a further purpose is to provide for transmitting the clamping pressure in a line at right angles to the cable axis.

in the accompanying drawings, Figure l is an elevation of the improved clamp positioned on cable, and Fig. 2 is a longitudinal section of the same. Fig. 3 is an end view of the clamp, and Figs. 4 and 5 are views of the clamping faces of the movable and fixed jaws, respectively. Fig. 6 is a detail of the wedging cam.

Referring to the drawings, 2 designates what 1 term the fixed jaw from the opposite edges of which project the separated parallel arms 3, and lying between the latter is the movable jaw 4 having its gripping face 4 opposed to gripping face 2 of jaw 2. The outer face 5 of jaw a is inclined from end to end, and is serrated to provide the transverse teeth 6. At the narrower end of jaw a is the tongue-like extension 7 to which a cable pulling line or other draft means is connected.

The toothed face of jaw 4 is engaged by the toothed periphery 8 of head 8 rotatable between arms 3 on eccentric trunnions 9 entered in bearings 10 formed in arms 3, the bearings being open through the edges of arms 3 as indicated at 1 to permit the trunnions to enter, in the preferred adaptation the outer sides of arms 8 being formed with outwardly bulged ribs 8 where the bearings open through the arm edges. Head 8 may be provided with projection 11 for turning it as desired.

In operation, the clamp is applied to cable A as shown in Figs. 1 and 2, the cam head 8 being turned down as in dotted lines in Fig. 2 until the extremities of jaw 4c are substan- Speeificat'ion of Letters Patent.

Application filed. July 22, 1912.

Patented Apr. 29, 1913.

Serial No. 710,824.

tially in line with the extremities of jaw 2, whereupon head 8 isturned into the full line position, Figs. 1 and 2, with its teeth engaging teeth 6 of the jaw so that a positive connect-ion is had between the faces of the head and jaw. The result is that any longitudinal movement of jaw 4L under the stress of the pulling force transmitted through extension 7 operates to increase the wedging hold of the clamp jaws. If desired, jaw may not be fully in line with jaw 2 when head 8 is turned into wedging position, the purpose being to compensate for the slight longitudinal movement of aw 4 under the pulling force so that when the clamp attains its maximum pressure the jaws are in alinement, or substantially so, as in Figs. 1 and 2.

An advantage of the construction above described is that the cable clamping force is imparted to the cable at right angles to the cable axis so that there is no tendency on the part of the clamp to bend or distort the cable, a serious objection to cable clamps now generally used. In this connection the particular arrangement. of the engaging faces of jaw and cam are important. As will be seen the face 6 of the jaw 4. increases in distance from its gripping face away from the pulling means connection, while the surface 8 of the cam 8 increases in distance from the cam axis as the cam moves to provide the wedging action. As a result, the pulling force acts to quickly set the gripping face of the movable jaw and consequently the direction of clamping force is not materially disturbed by the movement of the jaw and cam, the comparatively small movement required in setting the jaw being insufiicientto affect this action. This becomes of importance where saggingof the cable is had, since the close approach of the point of engagement to the l1ne of clamping action acts to practically render the welght of the jaw inefiective to rotate the cam in struction, being embodied in three pieces or castings so that danger of disorder is practically eliminated.

I claim 1. In a cable clamp, the combination of opposed jaws adapted to grip a cable with one aw movable longitudinally of the other jaw and adapted to connect with cable pulling means, the face of the longitudinally movable jaw opposite its gripping face be ing toothed, said toothed face increasing in distance from the gripping face away from the pulling means connection, and a rotatable toothed cam engaging the toothed face of the aw and operating to wedge the same toward the other aw under the stress of the cable pulling force imparted to said movable jaw, the engaging face of the cam increasing in distance from the cam axis as the cam is moved to provide the wedging action, whereby the pulling force acts to render the increases of cam and aw efl'ect-ive simultanously.

2. In a cable clamp, the combination of opposed jaws adapted to grip a cable with one jaw movable longitudinally of the other jaw and adapted to connect with cable pulling means, arms project-ing from the fixed jaw with the movable jaw located between the arms,the arms formed with bearings having lateral trunnion admitting openin and a device located between the said arms for wedging the movable jaw toward the fixed jaw and with trunnions on said device entered and rotatable in said bearings, said device and the movable jaw having engaging faces, said faces increasing in distance from the device axis and jaw gripping face respectively as the device is moved to provide the wedging action, whereby the pulling force acts to render the increases of device and jaw effective simultaneously.

3. In a cable clamp, the combination of opposed jaws adapted to grip a cable with one jaw movable longitudinally of the other jaw and adapted to connect with cable pulling means, arms projecting from the fixed jaw with the movable jaw located between the arms, the arms formed with bearings and with trunnion admitting slot-s extending from the bearings to the arm edges and the arms formed with bulges which bridge said slots, and a device located between the said arms for wedging the mov able jaw toward the fixed jaw and with trunnions on said device entered through the arm slots and rotatable in said bearings, said device and the movable jaw having engaging faces, said faces increasing in distance from the device axis andjaw gripping face respectively as the device is moved to provide the wedging action, whereby the pulling force acts to render the increases of device and jaw effective simultaneously.

4:. In a cable clamp, the combination of opposed jaws adapted to grip a cable with one jaw movable longitudinally of the other jaw and with the movable jaw extended at on end to connect with cable pulling means, inte 'al with and projecting from the fixed jaw with the movable jaw located between the arms, the edges of the arms distant from the pulling extension of the movable jaw slotted inwardly with the slots terminating in bearings, and a cam adapted to be entered between the arms and engage the movable jaw, the cam formed with integral trunnions adapted to enter the bearings in the arm through the slots in the latter, said cam and the movable aw having engaging faces, said faces increasing in distance from the cam axis and jaw gripping face respectively as the cam is moved to provide the vedging action, whereby the pulling force acts to render the increases of cam and jaw effective simultaneously.

in a cable clamp, the combination of opposed jaws adapted to grip a cable with one jaw movable longitudinally of the other jaw and with the movable aw having a longitudinally tapered transversely toothed outer surface and with the movable aw extended at one end to connect with cable aulling means the ta oer rovidin an in- 7 a Tease in distance between the gripping face and the outer surface away from the pulling means connection, arms integral with and projecting from the fixed jaw with the mov able 'aw located between the arms the ed es of the arms distant from the pulling extension of the movable jaw slotted inwardly with the slots terminating in bearings, and a toothed cam adapted to be entered between the arms and engage the tapered toothed face of the movable jaw, the cam formed with integral trunnions adapted to enter the bearings in the arm through the slots in the latter, the engaging face of the cam increasing in distance from the cam axis as the camjaw, the wedging faces of the jaw and cam increasing in distance from the jaw gripping face and cam axis respectively as the cam is moved to provide the wedging action,

whereby the pulling force acts to render the 7 increases of jaw and cam effective simultaneously.

7. In a cable clamp, opposed gripping aws, a rotataole cam carried by one of sald jaws and adapted to engage a wedging face of the other jaw, said jaws being clamped in adapted to limit its return movement under o excessive sagging of the cable.

In testimony whereof I afiix my signature in presence of tWo Witnesses.

MAX WAOHTEL.

position by the movement of the Wedging jaw in a direct-ion t0 Wedge the cam and jaw, the Wedging faces of the jaw and cam increasing in distance from the jaw gripping face and cam axis respectively as the cam is moved to provide the Wedging action whereby the pulling force acts to render the increases of jaw and cam efi'ective simultaneously, said cam having a member Witnesses:

J. M. NESBIT, ALEX. S. MABoN.

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

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