US2403816A

US2403816A - Cord and method of making cord

Info

Publication number: US2403816A
Application number: US540695A
Authority: US
Inventors: Samuel M Martin
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1944-06-16
Filing date: 1944-06-16
Publication date: 1946-07-09
Anticipated expiration: 1963-07-09

Description

` w, MANN CORD AND METHOD 'OF'V MAKING CORD Filed June l5, 1944 IN VENTOF? s. M. MARUN Patented July 9, 1946 PATENT OFFICE CORD AND METHOD OF MAKING CORD Samuel M. Martin, Baltimore, Md., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application .l une 16,

6 Claims. 1

This invention relates to cords and methods of making cords, and has for its object the provisions of new and improved cords and new and improved methods of making cords.

A method embodying the invention comprises bending a single insulated conductor into the form of a V, positioning a second insulated conductor along the portion of the first-mentioned conductor which forms one arm of the V, positioning a third insulated conductor along the portion of the first-mentioned conductor forming the other arm of the V, and securing together the central portions of the three conductors to form a Y.

A complete understanding of the invention may be obtained from the following detailed description of one embodiment thereof, when read in conjunction with the appended drawing, in which:

Fig. l is a plan view of a plurality oi components of a Y-type cord embodying the invention during an early stage of the process of making such cords;

Fig. 2 is a plan view of the cord during a more advanced stage of the manufacturethereof;

Fig. 3 is a plan View of the cord in a further completed stage of its manufacture;

Fig. 4 is a plan view of the completed cord, and

Fig. 5 is an enlarged vertical sectional view of the cord taken on the line 5--5 of Fig. 4.

In accordance with one method embodying the invention, an end of an individually insulated conductor I5 (Fig. 1) is doubled back upon the other end thereof to position it substantially in the shape of a V. An insulated conductor III is placed along one end portion of the conductor I5 and a third insulated conductor I I is placed along the other end portions of the conductor I5.

A tube I2 (Fig. l) composed of a suitable thermoplastic insulating and weatherproong material then is slid over the conductor Ill and the portion of the conductor 4I5 adjacent thereto. The insulating and weatherproof-ing material may be composed of one of the polymerized vinyl compounds, such as are sold under the trade names of Koroseal and Vinylita A second tube I3 identical with the tube I2 then is placed over the conductor II and the portion of the conductor I5 positioned along the conductor II.

A block I9 (Figs. l and 5) composed of a suitable insulating, resinous material such as one of the phenolic resins, has a pair of grooves 20--29 of a depth greater than the diameter of the tubes I2 and I3 formed therein and has formed thereon a tapered end 2|. The intermediate portions of 1944, Serial No. 540,695

the tubes I2 and I3 are placed in the grooves 2li-20, as shown in Fig. 2, and the tubes are iirmly secured together at each end of the block I9 by

lashings

23 and 24 to secure the block I9 therebetween.` I

A textile covering 32 (Figs. 4 and 5) is then braided from the lashing 24 over the block I9 to the lashing 23, whereupon the braiding is reversed and continued back over the block I9, the lashing 24, the tubes I2 and I3, and is finally terminated in a hollow, braided tube 33 (Fig. 4). The tube 33 is doubled to form a looped portion 34 and is secured in that position by a Whipping 35. The looped portion 34 serves as a fastening element for the cord.

A plurality of solderless tips 36-36 then may be attached by methods well known in the art to the ends of the insulated conductors I0, II and I5. A pair of whippings 3l and 38 then are served around the ends of the tubes I2 and I3, respectively, to hold the ends of the tubes in close contact with the conductors I0, II and I5 and prevent those conductors from being spread at the end portions of the tubes.

The block I9 serves as a sturdy support for a clip (not shown) or other securing means and protects from wear the portions of the tubes I2 and I3 placed in the grooves 2li-20. The

lashings

23 and 24 prevent the tubes I2 and I3 from being pulled apart during use of the Y-type cords formed by the method described hereinabove.

Y-type cords made by the above described method have only continuous conductors included therein, and, since no splices are included in such cords, the time andcost of making such cords are Very low, and the cords are uniformly high in quality.

What is claimed is:

1. A Y-type cord, which comprises an insulated conductor doubled back upon itself, a second insulated conductor extending along one of the doubled-back portions of the rst-mentioned conductor, a third insulated conductor extending along the other of the doubled-back portions of the Erst-mentioned conductor, a preformed tube oi weatherproong material surrounding the second conductor and the portion of the first-mem tioned conductor extending therealong, a second preformed tube of weatherproofing material surrounding the third conductor and the portion of the first-mentioned conductor extending therealong, and means for securing the tubes together at points intermediate of the ends thereof.

2. A Y-type cord, which comprises an insulated 55 4conductor doubled back upon itself, a second insulated conductor placed along one of the doubled-back portions of the iirst-menticned conductor, a third insulated conductor placed along the other of the doubled-back portions of the first-mentioned conductor, a pair of preformed tubes of a thermoplastic material, one of said tubes serving to surround the second conductor and the doubled-back portion of the first-mentioned conductor extending therealong, the other of said tubes serving to surround the third conductor and the doubled-back portion of the first-mentioned conductor extending therealong, a non-conducting block having grooves formed therein, and means for securing the central portions of the tubes within the grooves.

3. A Y-type cord, which comprises an insulated conductor doubled back upon itself, a second insulated conductor placed along one of the doubled-back portions of the first-mentioned conductor, a third insulated conductor placed along the other of the doubled-back portions of the mst-mentioned conductor, a preformed weatherproong tube enclosing the second conductor and the doubled-back portion of the rst-mentioned conductor extending therealong, a second preformed Weatherproong tube enclosing the third conductor and the other portion of the iirst-mentioned conductor extending therealong, a nonconducting block having a pair of grooves of a depth greater than the diameter of the tubes formed in opposite sides thereof, and means for securing the tubes together at both ends of the block to secure the tubes in said grooves.

4. A Y-type cord, which comprises an insulated conductor doubled back upon itself, a second insulated conductor extending along a doubledback portion of the first-mentioned conductor, a third insulated conductor extending along the other of the doubled-back portions of the rstmentioned conductor, a pair of tubes composed oi polymerized vinyl compound, one of said tubes enclosing one doubled-back portion of the firstmentioned conductor and the conductor extending therealong, the other of said tubes enclosing the other doubled-back portion of the first-mentioned conductor and the conductor extending therealong, an elongated and tapered filler body having a pair of grooves formed along the opposite sides thereof and composed of phenolic resin, a pair of lashings disposed at opposite ends of the body for securing the tubes together and in said grooves, a braided textile covering formed over the body and the portions o f the tubes extending i'rorn one end thereof and terminating in a hollow braided portion, and awhipping for securing said hollow braided portion in the form of a loop.

5. The method of forming Y-type cords, which comprises bending an insulated Conductor into the shape of a V, placing the conductor along a pair of individually insulated conductors with the last-mentioned conductors extending along the portions of the rst-mentioned conductor forming the arms of the V, enclosing one arm of the V and the conductor extending therealong in a preformed cover of Weatherproong material, enclosing the other arm of the V and the conductor extending therealong in a second preformed cover of Weatherprooiing material, securing the central portions of the covers together, and securing a non-conducting iiller plug to the central portions of the covers.

6. The method of forming Y-type cords, which comprises bending an insulated conductor into the shape oi a V, placing a pair of individually insulated conductors along the portions of the first-mentioned conductor forming the arms of the V, enclosing one arm of the V and the conductor extending therealong in a preformed tubular cover of Weatherproofing material, enclosing the other arm of the V and the conductor extending therealong in a second preformed tubular cover of Weatherprooilng material, placing the intermediate portions of the covers into a pair of grooves formed in opposite sides of a nonconducting block, securing the covers together at each end of the block, braiding a textile covering over the block, one end of each cover extending therefrom and beyond said end to form a braided tube, doubling the braided tube upon itself, and lashing' the doubled portions of the hollow braided tube to form a loop.

SAMUEL M. MARTIN.