US1653747A

US1653747A - Cable clamp

Info

Publication number: US1653747A
Application number: US165935A
Authority: US
Inventors: John J Usher
Original assignee: St Helens Iron & Marine Works
Current assignee: St Helens Iron & Marine Works
Priority date: 1927-02-04
Filing date: 1927-02-04
Publication date: 1927-12-27
Anticipated expiration: 1944-12-27

Description

" J. J. USHER CABLE CLAMP Filed Feb. 4. 1927 I /9 abtoznaql Patented Dec. 27, 1927.

,'UNITED STATES PATENT OFFICE.

JOHN J". USHER, OF ST. l-IELENS, OREGON, ASSIGNOR T ST HELENS IRON 8a: MARINE VJORKS, OF ST. HELENS, OREGON, A CORPORATION OF OREGOII.

CABLE Application filed February The present invention is directed to i1nprovements in cable clamps.

The primary object of the invention is to provide a device of this character that can be effectively used in connection with cable wires of different sizes.

Another object of the invention is to provide a clamp including a pair of gripping bloclis capable of being easily and quickly adjusted to present cooperative cable receiving grooves of various sizes. in order that the cables of different sizes can be effectively gripped.

Another object of the invention is to provide a device of this character so constructed as to automatically grip the cable when strain is applied to the device, the gripping action being increased upon the cable as strain is increased upon the device.

In the accompanying drawing:

Figure 1 is a side elevation of the device.

Figure 2 is a sectional view on line 22 of F ignre 1, looking in the direction of the arrows.

Figure 3 is a sectional view on line 33 of Figure 1.

Figure 1 is a perspective view of one of the clamping blocks.

The device comprises a pair of levers 1, 30 pivotally connected at their forward ends by a bolt 2, the rear ends of said levers being provided with fur-cations 3, grooved rollers 1 being rotatably mounted therebetween.

The levers are provided with lateral bosses 5 having formed therein recesses 6, the end walls of which being provided with grooves 7 the purpose of which will be later explained.

Clamping blocks 8 are employed and are removably mounted in their recesses 6, said blocks having lugs 9 upon their ends for engaging the grooves in the end walls of the respective recesses, and when thus engaged lateral displacement of said blocks is prevented,

The blocks are rectangular in cross section and have their side faces formed with longitudinal grooves 10, varying in size for use in connection with cables, or wires of different gage.

In order to more firmly grip a wire or cable certain of the block faces may be provided, respectively, with a transverse groove and

rib

11 and 12. It will be apparent that when the gripping blocks are CLAME.

4, 1927. Serial No. 165,935.

engaged with the wire or cable it will be firmly gripped in selected grooves 10 and if engaged between the spaces provided with the respective groove and

rib

11 and 12, the wire or cable will be clinched in order to more firmly grip the same. The block shown in Figure a is the one having the transverse ribs 12 and when engaged with a transverse groove will effectively grip the cable. The ribs are provided with grooves 1st which aline with the associated grooves By locating the bosses 5 in offset relation with respect 10 the levers the cable or wire engaged by the gripping blocks will extend longitudinally of the levers. 1 and will not lie between the outer ends of said levers and interfere with the free operation of the drawing cable 15. This cable, as shown in Figure 1, is trained around the wheels 4: and obviously, when strain is applied there to, the levers will be moved toward each other to enable the gripping blocks to bindingly engage the cable.

As shown in Figure l, a comparatively large cable is being drawn and at which time the grooves 10 employed are of a size to effectively receive the cable. Upon applying strain to the cable 15 the levers 1 will be drawn toward each other, thus causing the blocks 8 to firmly grip the cable. When it is desired to draw a small cable or wire, it will be of course understood that the blocks 8 are removed from the respective recesses and replaced with selected grooves 10 of the proper sizes confronting each other.

From the foregoing description it will be seen that a clamp has been provided which can be manufactured at a small cost and which is capable of being used in connection with telegraph and fence wires, or with cables or rope used in building constructions, mining or logging.

Having thus described the invention, I claim:

1. A device of the class described comprising a pair of pivotally connected levers, bosses carried by the levers and having recesses formed therein, the end walls of the recesses being provided with grooves, cable gripping blocks removably and adjustably mounted in the recesses and having lugs upon their ends for detachable engagement with said grooves.

lltl

2. A device of the class describedcomprising a pair off pivota lly connected 1evers, a boss on each level", each boss having a recess therein, a gripping block removably 5 mounted ineach r'eeess and having its face formed with czfl l'e-reeeiving grooves varying in size, the blocks being provided, respectively with a transverse rib and a transverse groove, said blocks being adapted to be adjusted to place a groove of one block 10 in registration with a similar groove of the other block and one rib of one block in the transverse groove of the other Mock.

In testimony whereof I aflix my signature.

JOHN J. USHEP. ['L. 3.]