US3720905A - Pin for electrical connectors as well as connectors provided with this pin - Google Patents

Abstract

The invention relates to a pin for electrical connectors consisting of a metallic body made of a material which can be deformed by the application of pressure, said body being provided with a cylindrical axial opening for receiving the cable to be connected mechanically and electrically to the pin, this invention is characterized in that the wall of the orifice for receiving the wire comprises at least one rib forming a sharpangled inner projection, made in the material constituting the pin and placed virtually transversally across the axis of the opening.

Description

United States Patent 11 1 Drogo 11 3,720,905 1 1March 13, 1973 PIN FOR ELECTRICAL CONNECTORS AS WELL AS CONNECTORS PROVIDED WITH THIS PIN [76] Inventor: Pierre Louis Marie Drogo, I04, rue

Garibaldi, Saint Maur (Val de Marne), France [22] Filed: May 21,1971 211 Appl. No.: 145,806

[30] Foreign Application Priority Data June 2, 1970 France ..7020210 1521 11.5. c1 ..'.....'....339/97 R, 339/276 T 51 1111.01. ..H0lr 11/20 1581 Field of Search 339/9s,97- 99,

[56] References Cited UNITED STATES PATENTS 2,604,508 7/1952 Bergan ..339/97 R 3,434,475 /1948 Sullivan ..339/115 R 3,154,302 10/1954 Blonder ctal..,,.,...,.,..,.1,....339/97 c 3,355,698 11 19/17 Keller 1 1 ..339 97 c 3,514,527 5/1970 Kuo ..339 97 R Primary Examiner-Joseph H. McGlynn Attorney-Mason, Kolehmainen, Rathburn & Wyss 57 ABSTRACT The invention relates to a pin for electrical connectors consisting of a metallic body made of a material which can be deformed by the application of pressure, said body being provided with a cylindrical axial opening for receiving the cable to be connected mechanically and electrically to the pin, this invention is characterized in that the wall of the orifice for receiving the wire comprises at least one rib forming a sharp-angled inner projection, made in the material constituting the pin and placed virtually transversally across the axis of the opening.

1 Claim, 3 Drawing Figures PIN FOR ELECTRICAL CONNECTORS AS WELL AS CONNECTORS PROVIDED WITH THIS PIN The invention relates to a pin for electrical connectors that can be fitted to a cable simply and rapidly.

The pin for electrical connectors consists of a metal-' lic body made of a material which can be-deformed by the application of pressure, said body being provided with a cylindrical axial opening for receiving the cable to be connected, mechanically and electrically to the pin.

The invention is characterized in that the wall of the orifice designed to receive the wire comprises at least 1 one rib forming a sharp-angled inner projection made in the material constituting the pin and placed virtually transversally across the axis of the opening.

According to another characteristic feature of the invention, the projections are made by threading the inner wall of the orifice.

By way of an example, the invention is illustrated but not limited by the accompanying drawings in which:

FIG. 1 is a partial sectional view of a connector with a male pin according to the invention. 1

FIG. 2 is a detailed sectional view of one of the pins in FIG. 1, not yet in the fixed position.

FIG; 3 is a detailed view of FIG. 2, the pin being in the fixed position on its cable.

The object of the present invention is therefore to produce pins for connectors, saidpins 1 having a male end 1 (see FIG. 1) or a female end as well as anopening 2 for receiving thewire to be connected electrically to the pin,

According to the invention, the pin enables insulatedelectric cables 3 to be received, that is, cables provided with asheath 4 made of an elastic material, such as a plastic material, without it being necessary, before hand, to expose the core of the cable over the part mechanical connection to be obtained between the cable and the pin.

The pin, according to the invention, is made of a material which can be flattened or deformed by pressure exerted with the aid of pliers, and has a body of a generally cylindrical form of small diameter (about 3 At one of the ends of this body anorifice 2 is made which comprises, on its inner wall, some transversal sharp-angled projections so that thepoints 5, of these projections can penetrate transversally into theinsulating sheath 4, whenthe pin is being fixed onto the cable with the help of pliers, in order to flatten and anchor themselves into thecore 6, as is shown in FIG. 3.

A good mechanical and electrical connection is thereby obtained between thebody 1 of the pin and the core'6 of the cable, without it being necessary, before hand, to expose the cable.

Theprojections 5 can be made in the form of annular ribs placed on all or part of the length of theopening 2, or else, preferably, in the form of a helicoidal thread (see FIGS. 2 and 3).

Making these projections in the form of a screw thread results in the diametrically opposed projections being displaced by half a thread with respect to one another in order to obtain sta gered g ri ping points when the cable IS fixed inslde t e pm wit the help of pliers, or similar device, which excl-ts pressure on diametrically opposed points of the pin, that is as shown in 7 (see FIG. 3).

This makes certain that the projections which, in preference, have a triangular form, will reach the core of the cable and fix themselves onto the cable without any risk of cutting it, in spite of its small diameter.

In addition, according to the invention, the height of the projections or the depth of the pitch of the thread is such that it is at least equal to the thickness of the insulating sheath of the cable, so that the material constituting this sheath can lodge itself between the projections or the threads without offering too much resistance during the gripping operation.

The pin according to the invention, enables electric cables to be connected simply and rapidly, since the relatively long operation involved in exposing the cable is eliminated, which is particularly advantageous when it is desired to grip cables of small diameter (about 1 m/m) inthe pins whose outer diameter is of the order of 3 m/m. j

When the cable has been fixed into a pin, it is then possible to makea connector (see FIG. 1) whose insulating body consists, for example, of twoparts 8 and 9 receiving the pins in housings provided for that purpose. t 7 a It is obvious that the invention is not limited to the examples of construction herein above described and illustrated and that, based on its embodiments, other methods and forms of construction can be envisaged within the scope of the invention.

I claim:

I. A tenninal pin for an electrical connector adapted for use with a cable having an outer insulating jacket, said terminal pin comprising an elongated body having an annular wall defining an axial recess for receiving a terminal end portion of said cable inserted therein for electrical and mechanical connection thereto, said body formed of electrically conductive material deformable by inward radial pressure to grip'said terminal end portion of said cable, said wall having an internal recess surface comprising a continuous helical thread generated around the longitudinal axis of said recess, said thread having continuous opposite side surfaces intersecting along a sharp angle apex for penetration into said cable upon compression of said body.

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Claims (1)

1. A terminal pin for an electrical connector adapted for use with a cable having an outer insulating jacket, said terminal pin comprising an elongated body having an annular wall defining an axial recess for receiving a terminal end portion of said cable inserted therein for electrical and mechanical connection thereto, said body formed of electrically conductive material deformable by inward radial pressure to grip said terminal end portion of said cable, said wall having an internal recess surface comprising a continuous helical thread generated around the longitudinal axis of said recess, said thread having continuous opposite side surfaces intersecting along a sharp angle apex for penetration into said cable upon compression of said body.

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