US2287761A - Electrical cable connector - Google Patents

Description

June 23, 1942. a. F. MATTHYSSE ELECTRICAL CABLE CONNECTOR Filed July 17, 1940 INVENIOR. Irving fieden'ck 1'! J56 F W AT QK Patented June 1,942

ELECTRICAL can: coNNEc'roa Irving Frederick Matthysse, New York, N. Y., as-

signor to Burndy Engineering Company, Inc., a corporation of New York Application July 17, 1940, Serial No. 345,871

1 Claim.

My invention relates to an electrical connector,

and more particularly to a connector provided with malleable connections for installation on stranded cable by crimping or indentation there- In order to provide a cable socket which can withstand the high pressures and considerable flow of metal required for a properly indented cable joint, it is necessary that the socket be made of a highly malleable material which will not work harden rapidly and which will not split or crack under high pressures. An example of such material .is pure copper.

On the other hand, the body of the connector especially the clamp type connector, must be made of a metal or alloy which has a high degree of strength and preferably one with a fairly definite yield point. Pure copper is unsatisfactory for this purpose because it doesn't have sufficient strength and it has no definite yield point.

Such connectors are not adapted for general use since the body of the connector must necessarily be made of soft copper which creeps under pressures applied over extended periods.

The primary object of my invention is to provide a connector which possesses sufllcient structural strength and therefore adapted for general application, yet provided with connections which may be made by crimping or indenting by mechanical or hydraulic tools.

I accomplish this object by providing a connector body, adapted for clamping purposes and other general uses, made of a metal or alloy which has a high degree of strength and preferably one with a definite yield point. Pure copper is unsatisfactory for this P p se because it does not have sufficient strength or a definite yield point. To this connector body, I aflix in a manner hereinafter described, cable sockets made of pure copper and highly malleable, which will not work-harden rapidly and which will not split or crack under high pressures.

I accomplish these and other objects and obtain my new results as will be apparent from the device described in the following specification,

particularly pointed out in the attached claim, and illustrated in the accompanying drawing,- in which: Fig. 1 is a side view of one form of my connector. I

Fig. 2 is a plan view of the same.

In the drawing reference numeral i designates the connector body provided with a transverse cable seat II for supporting a run conductor l2 .mounted transversely to the axis of the tap conductor IS. A cut-out section I4 is formed along, the axis of the run conductor for accommodating the clamping member i5. In the form shown, the clamping member is provided with a cable seat It, in juxtaposition t6 the cable seat ll. Apertures I! are providedin the member ii. to permit a set of attaching bolts 18 to be inserted therein, for threaded engagement with threaded holes 19 in the connector body l0. Recesses 20 are providedin' the clamping member iii to enable the bolt "heads 2| to be properly seated therein.

Extending from the connector body in the direction of the axis of the tap conductor I3 is a short plug-like extension 22. This has a diameter approximately equal to the tap-conductor socket 23, and a suitable length for supporting saidsocket. I

The socket 23 is then pressure fitted over the extension 22, and the joint is brazed, as at 24. When the tap conductor I3 is inserted to the desired amount into the cable socket, indentations 25 are formed into the soft copper cable socket and cable itself, securing the tap cable l3 to the connector body.

The malleable cable sockets are preferably cut from long lengths of malleable tubing, leaving after installation, a sufficient length of tubing projecting from the connector body to provide a cable socket adapted for crimping or indentation.

By my invention: I have provided connector bodies, especially adapted for manufacture by casting or forging, made of metal or alloy having a high degree of strength to withstand structural stresses of a high order, and preferably metal having a fairly definite yield point, so thatno permanent set is made. Pure copper is unsatisfactory for this purpose because it ,does not have sufiicient structural strength, and no definite yield point. It is especially necessary where the body, is provided with clamping portions, which must necessarily be of high strength metal. A suggested alloy, for example, made of 93% copper, El /2% of zinc, 2% lead and 1, /2% tin, is

satisfactory.

The cable socket should be made of highly malleable material, preferably a section of tubing, adapted to be cut to proper length from a longer section, which will not work-harden rapidly, which will not split or crack under high pressures, and which will permit considerable flow of the metal required fora properly indented cable joint. The socket could be made of pure copper, with a temper 10% hard or softer.

I have thus described my invention, but I desire it understood that it is not conflned to the particular form or uses shown and described, the

samebeing merely'illustrative, and that the invention may be carried out in other ways without departing from the spirit of my invention, and

therefore, I claim broadly the right to employ all equivalent instrumentalities coming within the scope or the appended claim, and by means of which, objects of my invention are attained and new results accomplished, as it is obvious that the particular embodiment herein shown and described is only one or the many that can be-em-' ployed to attain these these results.

objects and accomplish What I claim and desire to s cure by Letters Patent, is as follows:

An electrical connector for electrically and mechanically joining cables, comprising a connector body having means at one end thereof for mechanically clamping acable thereto,jand made 01 metal having a high tensile strength for obtaining high strength in the clamping-means; and a tubular sleeve of malleable metal, extending from said connector body. and adapted tov

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