US1649937A

US1649937A - Wire-pulling head

Info

Publication number: US1649937A
Application number: US171057A
Authority: US
Inventors: Herbert E Waltz
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-02-25
Filing date: 1927-02-25
Publication date: 1927-11-22
Anticipated expiration: 1944-11-22

Description

Nov. 22,1927. 1,649,937

7 H. E. WALTZ WIRE PULLING HEAD Filed Feb. 25. 192.7

INVENTOR H.2 7. wauz BY a? MM ATTORNEY Patented Nov. 22, 1927.

v UNITED stares HERBERT E. WALTZ, OF STQCKTON, CALIFORNIA.

wIRnrULLInG HEAD.

Application filed'Febx-uary 25, 1927. Serial No. 171,057

This invention relates to electricians ap- J p'liances and particularly to a device to be used for pulling wires through. conduits In the electric wiring for modern buildings, the wires must be fed through metal conduits which are frequently of considerable length, which are connected at intervals by couplings, and which are apt to have sharp bends therein. It-is therefore frequently qufte a task to pull the wires through such conduits and with the appliances at present available it often happens that the wires pull loose from the. appliance, and have to be fished for or pulled back and a fresh start made.

The principal objects of my invention therefore are to provide a pulling attachment which may be readily connected to the end of a wire in such a manner that the wire will be held firmly against slipping; one with which 'a considerable number of wires may be simultaneously connected up and pulled and one which will not tend to catch and jam at the conduit couplings or in the bends thereof.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views:

Fig. 1 is a side elevation of my improved attachment as in process of being clamped to a number of wires.

Fig. 2 is a sectional elevation of the device with the partsin their clamping position. I

Fig. 3 is an end elevation of the wire receiving element of the device.

Referring now more particularly to the characters of reference on the device, the attachment comprises a pair of separable

cylindrical members

1 and 2 substantially .of the same diameter. The member '1 is provided with a centrally disposed threaded stud 3 which projects therefrom at one end, the opposite end of said member being recessed or cupped as at 4. Surrounding the stud in concentric relation therewith is a plurality of holes 5 drilled through said member and communicating with the cup 4 adjacent the rim thereof.

rounded bail 8 is attached to and projects from the opposite or outer end of the mom-1 ber 2,.to enable a pulling wire, orthelike to be readily applied to the device.

In operation the wires 9 of the cables 10 to be pulled are bared at one end from their The member 2 is centrally tapped to screw .onto the stud and is concave on its face adacent the member 1 as at 6 to form a clamping edge 7 around its outer periphery. 1 A

insulation covering for a certain distance so.

as to enable the bare'avires to be projected through and beyond the holes 5, each such hole being of a suiiicient size to take all.

the wires of each cable. The ends of the wires beyond the member 1 are then bent outwardly as shown in Fig. 1, to a point outwardly of the plane of the clamping edge of the member 2. The latter is then screwed down tight onto the stud 3 so that the wires will be engaged and clamped between the edge 7 and the adjacent surface of the memher 1. The ends of the wires then protruding from between said members are then hammered over so as to lie adjacent the member 1, the latter being of reduced diameter for the adjacent portion of its extent as shown at 11, so that the wires will not project outwardly of the normal diameter of the device. t

It will'therefore be seen that any neces sary pulling pressure may be applied to the device to'pull the cables through a conduit without danger of the wires slipping from position.

The. length of the two parts of the head when coupled together is sufficiently small so thatthere is no danger of the device jamming in a bend of any sharpness liable the wires engaging the walls or ends ofthe conduit.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets. forth in de- I ber having an orii tail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is: a

1. A wire pulling head comprising a member having an or1fice therethrough to receive a wire, a central threaded stud projecting from one end. of said member, the orifice being to one side of the stud, and a tapped member to be screwed onto the stud to engage and clamp awire against the first named member. V V

2. A wire pulling head comprising a memice therethrough to receive a Wire, a central threaded stud projecting from one end of said membenthe orifice being to oneside, oi": the stud, and a tapped member to be screwed onto the stud, said tapped member at its inner end being con-V caved to form a peripheral clamping edge for sharp engagement with a wire bent out w'ardly from the adjacent end of the. orifice.

3. A wire pulling head comprising a memher having an orifice therethrongh to receive a wire, and another member to be advanced toward the outer end of the first member to engage and clamp a wire passed through the orifice and bent outwardly therefrom; said first member from and adjacent its outer end being of a lesser Width than the second member to an extent sufficient to enable the outer end of the Wire after being clamped to be bent to lie along the first member without projecting past the plane of the periphery of the second member.

" In testimony whereof I aflix my signature.

HERBERT E. WALTZ. i