US2739623A - Wire twisting device - Google Patents

Description

March 27, 1956 1 H WlRT WIRE TWISTING DEVICE Filed Dec. 30, 1953 United States Patent O WIRE TWISTING DEVICE John H. Wirt, Los Angeles, Calif. Application December 30, 1953, Serial No. 401,339

2 Claims. (Cl. Mtl-149) This invention relates to devices for twisting the ends of a stranded wire cable.

An object of the invention is to provide a device which will quickly and easily twist the ends of the strands of a wire cable and may be easily adjusted for use with cables of diiferent sizes.

Another object of the invention is to provide a device for twisting the ends of a stranded wire cable which is adapted to be mounted upon a rotary shaft and which may be readily mounted upon or demounted from such shaft.

Another object of the invention is to provide a wire twisting device which will receive and twist the ends of a stranded wire cable even though the ends have become badly separated and bent out of line.

Other objects and advantages of the invention will appear from the following description considered in conjunction with the attached drawing, in which:

Figure l is an elevational view of the device of the present invention in section, shown as mounted upon a rotary shaft and receiving the untwisted ends of the strands of a wire cable.

Figure 2 is an exploded view of the assembly of Figure l.

Figure 3 is an end view of the assembly of Figure l.

Figure 4 is a view taken along the line 4-4 of Figure 2.

Figure is an elevational view of the end of a wire cable after it has been twisted by the device of the present invention.

Referring to the drawings in more detail, numeral 1 designates a spindle having an axially tapering bore 2 extending inwardly from one end 3 of the spindle 1 and terminating at a point spaced from the other end 4 of the spindle 1. The end 4 of the spindle 1 is provided with means, coaxial with the bore 2, for the attachment of a rotation imparting element thereto. Specifically such means consists of an inwardly extending bore 5 coaxial with the bore 2 and terminating at a point spaced from the inner end of the bore 2, the bore 5 conformably receiving the end of a rotary shaft 6 driven by a motor 7. A set screw 8 passes threadably through the portion of the spindle 1 surrounding the bore 5 and seats in a conforming indentation in the shaft 6 to lock the spindle 1 upon the shaft 6.

Frictionally engaging the bore 2 and slidable therein is a forming die 9 fabricated of resilient material. The die 9 is provided with a tapering bore 10 coaxial with the bore 2 and extending completely through the die 9 for the reception of the untwisted strands of wire projecting from an end of a wire cable 21. A guide member 11 surrounds and is connected to the end 3 of the spindle 1 for rotation with the spindle. The guide has an internally threaded portion 12 which engages the externally threaded portion 13 of the spindle 1 and an end portion 14 provided with a tapering coaxial bore 15 extending therethrough. Surrounding the inner end of the bore 15 is a reduced projecting portion 16 which bears upon the outer edge of the die 9. A nut 17 in threaded engagement with the portion 13 of the spindle 1 serves as a stop for the movement of the guide 11 upon the spindle 1.

In preparation for twisting the ends of the strands of a wire cable by the use of the device of the present inven- Cil 2,739,623 Patented Mar. 27, 1956 tion, the spindle 1 is mounted upon the shaft 6 and locked thereon by means of the set screw 8. The guide 11 is next moved upon the spindle 1 until the projecting portion 16 is in contact with they outer edge of the die 9. The nut 17 is then set at the inner end of the guide to limit its further inward movement. The motor 7 is now turned on to cause the rotation of the shaft 6 and the end of the cable to be twisted is inserted in the outer end of the bore 15 of the guide 11, as shown in Figure 1. The rotation of the bore 15 brings the untwisted strands of the wire together and guides them through its inner end into the bore 10 of the die 9. The resilient surface of the bore 10 frictionally engages the strands of the cable, which have been given a preliminary straightening and aligning by the guide 11, and twists them spirally upon one another until they are neatly twisted as shown in Figure 5.

The device may be adapted for use with smaller sizes of cable by releasing the nut 17 and moving the guide 11 inwardly on the spindle 1 so that the projecting portion 16 pushes the die 9 inwardly of the bore 2 compressing the die 9 and thus reducing the diameter of the bore 10 of the die.

Obviously a wire may be twisted in the opposite direction by the device of the present invention by simply reversing the direction of rotation of the shaft 6,

What is claimed is:

1. A wire twisting device comprising a spindle having an axially tapering bore extending inwardly from one end thereof and terminating at a point spaced from the other end thereof, means on the other end of said spindle and coaxial with said bore for attachment of a rotationimparting element thereto, and a forming die frictionally engaging said tapered bore of said spindle, said die being provided with a tapering coaxial bore extending completely therethrough for the reception of the untwisted strands of wire projecting from an end of a wire cable, a guide member surrounding and connected to said one end of said spindle for rotation with the latter, said member having a tapering coaxial bore extending therethrough and a reduced projecting portion surrounding the inner end of said bore and bearing upon the outer edge of said die to hold the die in position, and a nut surrounding and connected to said spindle for rotation about said spindle and serving as a stop for the movement of said guide member on said spindle.

2. A wire twisting device comprising a spindle having an axially tapering bore extending inwardly from one end thereof and terminating at a point spaced from the other end thereof, means on the other end of said spindle and coaxial with said bore for attachment of a rotationimparting element thereto, a forming die fabricated of resilient material and frictionally and slidably engaging said bore of said spindle, said die being provided with a tapering coaxial bore* extending completely therethrough for the reception of the untwisted strands of wire projecting from an end of a wire cable, and a guide member surrounding and connected to said one end of said spindle for rotation with the latter, said member having a tapering coaxial bore extending therethrough and a reduced projecting portion surrounding the inner end of said bore and bearing upon the outer edge of said die to hold the die in position.

References Cited in the le of this patent UNITED STATES PATENTS 2,472,510 Bennett June 7, 1949 FOREIGN PATENTS 528,490 Germany July 17, 1931 874,508 France May 4, 1942

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