US2251709A

US2251709A - Method of connecting wires to sleeves

Info

Publication number: US2251709A
Application number: US312388A
Authority: US
Inventors: Charles H Klein
Original assignee: National Telephone Supply Co
Current assignee: National Telephone Supply Co
Priority date: 1940-01-04
Filing date: 1940-01-04
Publication date: 1941-08-05
Anticipated expiration: 1958-08-05

Description

Aug. 5, 1941. c. H. KLEIN METHOD OF CONNECTING WIRES TO SLEEVES Filed Jan. 4, 1940 fie] l /a. Z

5&4 I

INVENTOR.

flier/e6 Alcl/Z E 3 ATTORNEY.

. Patented Aug.

UNITED STATES PATENT OFFICE METHOD OF CONNECTING WIRES TO SLEEVES Charles H. Klein, Cleveland, Ohio, assignor to The National Telephone Supply Company I Application January 4, 1940, Serial No. 312,388

3 Claims.

My invention pertains to a joint between a wire and a metallic sleeve and the method for making same.

Successful compression type splicing sleeves usually have an abrasive to help hold the conductor-without necking the wire. See Moore Patent 1,827,297 and Breniz'er Patents 1,936,185

and 2,038,535. My proposal is to apply a mixture of a waterprooflead compound or a binder like shellac or lacquer and a finely divided abrasive to the wire. The conductor when ready for splicing,

' is coated withjhev mixture and then inserted in the sleeve and the sleeve is compressed by any one of the known arts such. as drawing, rolling or squeezing with a hinge type tool.

An object of my invention is to coat the end or a wire to be anchored in a sleeve with an abrasive to prevent the wire from pulling out oi. the sleeve upon a pulling force being put on the wire with respect to the sleeve.

Another object of my invention is to cover the Other objects and a fuller understanding .of my invention may be had by referring to the followcompression sleeve showing the wires in position end of a wirewith a binder such; for example. as

shellacor lacquer which contains an abrasive.

Another object of my invention is to waterproof a joint betweena wire and a sleeve by applying a waterproof lead compound binder containing an abrasive to the wire and by inserting the coated wire into the sleeve and compressing same to make the waterproof joint.

Still another object of my invention is to provide for covering the ends of wiresvadapted for insertion into a connecting sleeve by applyinga waterproof lead compound binder which contains an abrasive material and which, when the wire is inserted and clamped into the connecting sleeve, establishes a waterproof coating to protect the wires being joined.

A further object of my invention is to provide a lead compound binder for application to a stranded wire which penetrates the spaces between the strands of the wireto form a waterproof coatingand which contains an abrasive to prevent slippage oi the strands with respect to each other and to. the compressed sleeve. 7

Still another object of my invention isto proinside the compression sleeve and before a .com-

pressio'n pressure has been applied to the sleeve. Figure 4 is a longitudinal cross-sectional view showingan abrasively coated stranded cable in a compression sleeve after the sleeve has been compressed about the-cable.

' Figure 5 is a transverse cross-sectional view taken along the line 5-5 of Figure 4 showing a stranded cable which has been coated with shellac and an abrasive and squeezed inside the com pression sleeve; and

Figure 6 is a. view similar to Figure 5 showing a strandedcable which has been coated with a waterproof lead compound-carrying an abrasive.

In Figure l of the drawing, I have illustrated one embodiment" of my invention. It consists of wires i0 having their ends covered with a binder such as shellac or a lead compound and an abra-' sive l I which are inserted into a sleeve 12 which I is intimately compressed upon the wires I!) and ing exerted on the sleeve as is shown in Figures vide a binder containing an abrasive which is thin enough to flow between-the strandsoi' a wire cable and carry the abrasive-with it.

Another object of my invention is to prevent th slipping of an individual wire with respect to the other wires in a stranded cable by applying an abrasive between the individual wires and to prevent the slipping oi! the stranded cable with respect to a clamping sleeve by applying an abrasive between the cable and the sleeve.

the binder and abrasive II. V V

In order to more fully illustrate the function of the abrasive II onthe wire III I have shown the abrasive in cross-section and the wire ll in full side view. By so doing 1- best illustrate the abrasive sticking to the surface-o1 the wire II as in Figures 21 and 3 and imbedded in the wire I. and the sleeve l2 upon a squeezing pressure be- 1 and 4. Although itis not shown it is to be understood that the abrasive ll substantially completely encircles the ends of the wire II.

I preferably coat the wires II with the abrasive 4 II as this method permits the person such as aiinesman who is connecting the wires II in the sleeve I! to make a final inspection oi? the abrasive ll before inserting'the wires ll into thesleeve l2. The coating of the inside of the sleeve II with an abrasive during manufacture renders a final inspection by the lineman in the-field rather dimcult. A lineslnan may cut the wire ll at the desired point and dip the end oi! the wires wires l and the abrasive ll.

\ wires is avoided.

to be joined in a container of binding material such as shellac or lacquer into which is mixed an abrasive, or in a container of binding material such as a waterproofing lead compound into which is mixed an abrasive.- The wires are then inserted, see Figures 2 and 3, into the open ends of the sleeve l2, until they abut the internal stop I1, after which the sleeve is compressed upon the As illustrated, the compression may be done by means of a constant movement clamping tool which makes depressions I3 in the surface of the sleeve l2 and causes the abrasive II to dig into both the inside surface of the sleeve l2 and the outside surface of the wires ill to provide a firm non-slipping joint between the sleeve and the wires. The non-slipping joint is efiected without necking,the wire Ill. That is, it does not reduce the cross-sectional area of the wire l0, and as a result the joint is as strong as the wire itself.

A feature of my invention is the use of 'a binder which carries the abrasive II. A shellac or lacquer may be used which will air dry quickly into a semi-fluid or gummysubstance which will "hold the abrasive particles asthe wires I0 are beinginserted into the sleeve l2 and which will establish a waterproof coating about the wire to prevent the seepage of moisture into the joint, or a lead base compound may be used to protect the wire and the joint from water damage.

A-further feature of my invention is that the llnesman-may determine the quantity of abrasive and waterproofing material needed for each joint. This is of importance as the presence of abrasive H and the binder tends to reduce the electrical conductivity between the wires l0 and the sleeve I 2. -A good current conducting joint is highly desirable as well as a good grip between the sleeve 12' and thewires l0. Therefore, by my invention, the linesman can apply binder and abrasive over a suflicient length of the inserted ends of th wire to assure a strong joint and leavea length oi. the wire free from binder and abrasive to establish a joint which will have a high electrical conductivity. -The application of the abrasiveand binder can be varied to accommodate field conditions and each joint will have the maximum strength and conductivity possible.

The binder and abrasive may be applied to the wires Ill by means of a brush or the wires may be dipped into a container of the mixture.

My invention has great utility when used with a stranded cable I! such as is shown in Figures 4 and 5. The cable I 4 comprises an inner core zone l5 which may be a single wire or a plurality of wires and an outer concentric zone l6 which may be a plurality of wires twisted around the core wire. In'the practice ofmy invention the binder and the abrasive is provided between the core wire'and the outer wires as well as between the outer wires and the inside of the sleeve, and slippage between the as well as around the entire cable. When a sleeve core wire and the outer I 2 in Figure 4 is compressed around the stranded cable M which has been treated with an abrathereby preventing the slippage of any one wire in the outside zone with respect to the others. The abrasive also prevents slippage of the outsidewires IS with respect to the sleeve I2. My invention therefore prevents the slipping of the core wire IS with respect to the sleeve l2. My binder also Waterproofs the joint to'reduce damage by moisture and other damaging elements. My joint is impervious to moisture and willnot corrode.

Figure 5 illustrates a stranded cable M which has been coated with an abrasive l I mixed in a thin shellac or lacquer and shows how the abrasive H is embedded into the wires of the cable and into the sleeve I2. I

Figure 6 illustrates a. cable' M which has been coated with the abrasive ll mixed in a lead compound binder. Eifective waterproofing is provided by the lead compound as substantially all of the spaces between the wires of the cable I! j are filled with the compound and the spacesbee tween the cable l4 and the sleeve l2 are substantially filled with the compound.

Although I have described my invention with a certain degree of particularity, itis understood that the present disclosure has been made only by way'of example and that numerous changes in the details of construction may be resorted to without departing from the spirit-and the scope of the invention as hereinafter claimed.

I claim as my invention: I

end of the wire with an abrasive mixed with an air drying binder, inserting the wire in the open end of a sleeve, and compressing the sleeve upon the abrasive coated wire to embed said abrasive into 'saidsleeve and into said wire.

2. The method of making a .joint between a sleeve and'a stranded wire comprising, coatin and waterproofing the stranded wire with an abrasive mixed in a thin air drying binder which the abrasive between the wires themselves and between the wires and the inside of the sleeve.

3.'The method of making a joint between a sleeve and a stranded wire comprising, coating and waterproofing the stranded wire with an abrasive mixed in a waterproofing compound which penetrates and substantially fills the spaces between-the strands of the wire, inserting the wire in the open end of a sleeve, and compressing the sleeve into intimate contact with the abrasive coated wires to embed the abrasive between-the wire's themselves and between the wires and the inside of the sleeve.

CHARLES H. KLEIN.

1. The method of making a wire and sleeve' joint which comprises the steps of coating the