US2594363A

US2594363A - Wire stripper

Info

Publication number: US2594363A
Application number: US165281A
Authority: US
Inventors: Gene R Stephenson
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-05-31
Filing date: 1950-05-31
Publication date: 1952-04-29
Anticipated expiration: 1969-04-29

Description

April 1952 G. R. STEPHENSON 2,594,363

WIRE STRIPPER Filed May 31, 1950 FIG.I

FIG.2

INVENTOR. GENE R. STEPHENSON A f/orn ey Patented Apr. 29, 1952 UNITED STATES PATENT OFFICE 2,594,363 WIRE s'rmrrnn Gene R. Stephenson, Sheridan, Oreg.

Application May 31, 1950, Serial N0. 165,281

(Granted under the act of March 3, 1883, as

Claims.

amended April 30, 1928; 370 0. G. 757) The invention described hereinlmay be manufactured and used by or for the Government for governmental purposes, without the payment to me'oi any royalty thereon.

. This invention relates to 'a wire stripper for removing the covering or insulation from covered wires.

In using electrical conductors, particularly flexible wire conductors such as are commonly used in telephone lines, telegraphy, etc., there is a continuous need for removing the insulation covering from the wire.

- The'primary object of the invention is to provide a,' means for facilitating the removal of insulating material from electrical conductors at places where splices or connections are to be made.

Other objects and advantages will become apparent from the following description, in which:

Fig. 1 is a front elevational View 01 a pair of pliers having incorporated therein a preferred form of stripping means and showing an insulated wire being drawn between the stripping means;

Fig. 2 is a front elevational view of a modified formof my invention; and

Fig. 3 is an enlarged elevational view of the stripping means of Fig. 1, the insulated conductor being shown in section for reasons of clarity. vIn the drawing, a pair of pliers includes crossed levers l3, l5, pivoted about a pivot pin I6, the forward ends of which levers cooperate to provide coacting jaws, each of said jaws having'fiattened knurled portions H. The rear ends of the'levers l3, l5 form handles l9, 2| as shown.

. The inner faces of the levers I3, l5 are provided respectively with

recesses

23, 25, in which recesses are mounted, respectively,

rotatable cutting members

21, 29 which serve as meansfor cutting, abrading or marring the insulation 3| of an insulated cable 33. Extending through the

recesses

23, 25 are

posts

35, 31 upon which the cutting-

members

21, 29, respectively, freely rotate as hereinafter described. Each of said

cutting members

21, 29 is a cylinder, the lateral surface of which is provided with a helically disposed cutting edge 39, similar to a screw thread. As is seen in Fig. l, the

cutting members

21, 29 are substantially parallel to each other when the pair of pliers II are in operating position,

In. the form of my invention shown in Figs. 1 and 3, the two cutting edges 39, of the two

cutting members

21, 29 comprise right hand threads. However, if desired, both cutting

members

21, 29 could have left hand cutting threads. V

In Fig. 2, there is shown a modified form of my invention wherein the cutting edges or screw threads 39 oi the

cutting members

21, 29 have opposite direction; that is, the left hand member 21 has a left hand thread, and the right hand member 29 has a right hand thread.

In use, the handles I9, 2|, are drawn apart (as shown in Fig. 2) and the cable 33, from which a part of the insulation 3| is to be removed, is placed between the

cutting members

21, 29. The handles l9, 2| are then moved toward each other so that the cutting edges 39 firmly grip said cable. One end of the cable 33 is then grasped and it is drawn between said cutting

members

21, 29 causing said members to rotate. In the course of such rotation, the insulation 3| will be cut and abraded by the cutting edges 39. Where the cutter is to be used generally on a particular size of cable, it is desirable that the spacing between the cutting edges 39 of the

members

21, 29 be at least as great as the diameter of the conductor of the cable. However, in a wire stripper for use with conductors of different sizes, the depth of cut or amount of abrasion of insulation 3| can be readily controlled by the pressure applied on handles l9, 2|.

When the wire stripper is so made that the

rotatable members

21, 29 have cutting edges that are either both left handed threads or both right handed threads, an insulated wire drawn through the tool will not ride up or down the threads, but will remain fixed at any point between the rotating

members

21, 29. By twisting the wire in its travel through the tool, all surfaces of the insulation 3| will be thoroughly and completely out and abraded. Removal of the cut portion of the insulation can be easily and quickly accomplished by inserting the cut section of the insulation between the knurled portions of the jaws of the pliers and drawing off said out portion leaving the exposed conductor for its desired use.

While there has been herein described the preferred embodiments of my invention, it is obvious that modifications and changes may be made without departing from the spirit and scope of my invention. For example, while I have described the edges of the cutting members as being made of helically disposed screw threads, it will be apparent that other types of abrading or cutting surfaces may be utilized. As a means for carrying the cutting members, I have indicated that a pair of crossed levers, such as a pair of pliers, be used. It is to be understood, however, that the invention is not to be limited to such modification as other supporting means for carrying the cutting members may be also utilized.

Having thus described the invention, what is claimed as new is:

1. In a tool for the removal of insulation from wires, the combination of a pair of pivoted crossed levers, and means sustained by said levers for removing the insulation from wires, said means comprising cutting members rotatably sustained respectively by said levers in coacting relationship, each of said members having a helically positioned cutting edge thereon.

2. A tool of the type described in'claim' 1 wherein the cutting edges of said rotatable members have opposite directions of pitch with respectto each other.

3. In a tool for the removal of insulation fromwires, the combination of a pair'of; pivotedcrossed levers, the inner faces of said levers. being provided with mutually opposing recesses, a'pin disposed. in each of said recesses and a cutting membe rotatably' carried. by each of said pins, each of said members having a substantially helically positioned cutting edge, said edges of both members having the same direction of pitch.

4. A tool of the type described in claim 1,

wherein the cutting edges of said rotatable members have the same direction of pitch.

5. A tool for the removal of insulation from an insulated wire, comprising in combination a pair of rotatably mounted cutting members, each of said members consisting of acylindrical body having a substantially helically positioned edge thereon for abrading and cutting the insulation of said wire and means for urging said members toward each other.

GENE R. STEPHENSON.

REFERENCES CITED The. following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 631,159 Echols Aug. 15, 1899 885,068 Bastie Apr. 21, 1908 1,551,875 Hall Sept. 1, 1925 1,594,036 Baker July 27, 1926 2,390,369 Hopper Dec. 4, 1945