US1899531A - Wire puller - Google Patents

Description

L. P. SEIFNER Feb. 2s, 1933.

WIR-E FULLER Filed July 11, 1931 A; NVENTOR Lau/a5 $3/ Patented Feb. 28, 1933 UNITED STATES PATENT oF'FlcE LOUIS I. SEIFNER, OF SEATTLE, WASHINGTONQASSIGNOR 0F ONE-HALF TO J OSEPVHINE C. LABSIN, OF SEATTLELWASHINGTON WIRE PULLER Application filed July 11,

My present invention relates to the art of cable or wire handling devices and more particularly to that general class of devices known as wire pullers. Y

When cables such as are used for carrying electrical current, telephone communication lines, and the like, are placed underground, it is necessary to have some means of securing adraft line to the cable to pull it through the underground pipe or conduit. mally there is but little more room in the conduit or pipe than is required by the cable. This precludes the possibility of knotting a drable through the end of the power or telephone cable. Many devices have-,been produced in the past using toggle clamp means and U-shaped clamps and the like, but they have been found to be very bulky and not suitable for conduit work. It is to provide a satisfactory means for wire pulling which will overcome the above deficiencies that I have created my device. Therefore The principal object of my invention is to provide a wire puller arrangement that is very compact and yet which will securely hold the end of a cable it is desired to drag thro'ugh a conduit. Y

A further object is to provide a wire puller which is so constructed that additional strain on the cable serves to tighten the wire pullers grip on the cable.

A still further object is to provide a wire puller which by the interchanging of certain small parts is readily adaptable to cables of varyingsizes.

Other and more specific objects will be apparent from the following description taken in connection with the accompanying drawing, wherein Figure 1 is a perspective view showing my device as used on a cable.

Figure 2 is a longitudinal sectional view through my device showing it in the initial step of applying it to a cable.

Figure 3 is a longitudinal sectional view showing my device as locked upon a cable.

Figure 4 is a cross sectional view along the line 4 4 of Figure 3.

Referring to the drawing throughout which like reference characters indicate like Now, nor-V 1931. Serial No. 550,157.

Vwhich will place lthe sleeve co-aXially with` cable 14 is the clampsleeve 18. As shown in my drawing this member is provided withan external or male thread 20 whichis adapted to engage'the internal threads 16 of member 10. Sleeve 18 is provided with a lcentral bore 422 which is tapered, having its largest end adjacent the threaded portion. It has also been founddesirableto .have a small portionas 24 which is a straight cylinderbore. Adapted -to be engagedlby the tapered surface 22 isa plurality of jaw members 26. lI have found it convenient to use three such members,v although I would not care tobe limited to this number. These members are machinedA on so Y their outer surfaces 28 with a taper of the same degree as taper 22 of member y1,8' and I have further provided a cylinderpportion' 30 of the. same length substantially as cylinder bore 24 of member '17.

The inner surface of the jaw members VI prefer to provide with teeth. v Screw threads have been used by me in a number of instances, but I prefer the construction vshown in greater detail in ,Figure 3 in which the teeth 32 are arranged to permit the easy insert-ion of acable and disposed to prevent its removal; in other words a saw-toothed arrangement with the points pointing inwardly towards the draft head.

or rubber covered cable, as 34, it has been found most` desirable usually to strip off the covering and insert the cable through the. Vsmall end of member 18 after -the showing of l Figure 2. The jaw members 26 are then grouped around the exposed end of the cable.

The next operation is to slide sleeve 18 up over the compressed j aw members and finally to engage threads 2O into threads 16 of the draft head and tighten the member after the 5 showing of Figure 3. In this position the teeth 32 of the jaw members are forced Afirmly into the cable; in other words, settingthemselves in the cable and when a draft strain is placed on cable 14 there is a tendency to move the jaw members 26 rearwardly.v This Iis.

prevented, however, by the sloping bore of member 18 and the only effect accomplished, is that of more securely grasping the end of the cable. Y Y

The foregoing description and the accompanying drawing are believedfto Vclearly disclose a preferred embodiment of my invention but it will be understood that this disclosure is merely illustrative and that such v20 changes in the invention may be made as are fairly within the scope and spirit of 'the following claims.

What I claim is:

1. A wire puller consisting of a draft head,

having a tapered seat adapted to engage aY pulling cable; a clamp sleeve, adapted to engage said draft head, having a tapered bore; and a plurality of jaw members. adapted to cooperate with the tapered bore ofthev clamp 30 sleeve to clampa'cable end positioned in said sleeve. f

2. A wire puller consisting of a threaded draft head; a pulling cable secured to said draft head; a clamp sleeve having a threaded f d3% portion, adapted to engage the threaded por- "40 sleeve.

tion of thev draft head, andV a tapered bore; and a plurality ofjaw members adapted to cooperate with the tapered bore of the clamp o sleeve to clamp a cable end positioned in said n 3. A wire puller consistingfof an internally threaded draft head, a pulling cable secured to said draft head; a clamp sleeve having an external threaded portion, adapted to engage j the threaded portion ofthe draft head,an'd a tapered bore; and a plurality, of toothed jaw members having a combined outer surface tapered to match the taper of the clamp i sleeve, adapted to cooperate` with the tapered `50 bore of the clamp sleeve vto clamp a cable end positioned in said sleeve.

In witness whereof, I hereunto subscribe my name this 11 day of June A. D. 1931.

"5t LOUIS P. SEIFNER.

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