US2118103A - Cable connecter and support - Google Patents

Description

May 24, 1938. w. OEDING CABLE CONNECTER AND SUPPORT Filed June 8, 1935 m R o w. m m fi mm Patented May 24, 1938 UNITED STATES PATENT OFFICE CABLE CONNECTEB AND SUPPORT Wolfgang Oe'dlng, Berlin-Charlottenbu g, Germany, assignor to.8lemens I; Halske, Aktlengesellschaft, Siemensatadt, near Berlin,

Ger-

many, a corporation of 2 Claims.

proved formof connecter to electrically connect two wires or cables together.

A further object is to provide a connector be- 5 tween two wires or cables one of which is enclosed within an outer metallic shielding cover, the connecter being also designed to support the latter wire entirely by means of its metallic cover.

Other and further objects of the invention will become apparent to those skilled in the art as the description thereof proceeds. For a better understanding of the invention, however, reference is made to the accompanying drawing in which;

Fig. l is a partial cross section of a connecter made according to my invention, and

Fig. 2 is a side view of the connecter shown in Fig. 1.

Terminals or connecters of the kind )heretofore mostly used are without exception of such a kind that the tension produced by the weight of the line or feeder is jointly taken up by the sheath and the inside conductor. As a result of the permanently acting tractive and occasionally also flexural stresses, the slender inside conductor is a subject to a risk of breaking. In addition the mounting of such terminals is attended with serious dimculties, especially in shielded radio frequency or antenna feed leads, which, as is well known, because of the capacitive action of a the screening metal sheath are of large diameter and. of especially suitable hollow forms of construction for the insulating and the supporting or strain material.

In the terminal here disclosed these disadvantages are obviated. According to this invention the terminal of a line or feeder has a conical clamp devicefor receiving the braiding cover which thus is called upon to support the line alone, whereas the inside conductor and the so rubber envelope thereof are not called upon to withstand any tension.

- As shown in the sectional view Fig. 1, i denotes the braided metallic envelope of a line or feeder comprising the inner conductor I and its insulation covering 2. Between the insulation covering and the braiding on top is introduced a preferably separate clamping cone member 4 of insulating material. Fitted thereover is a clamp nut 5 also of insulation material and having a correspondingly shaped inside bore, said nut piece 5 being screwed in a screw cap t. The inside conductor 3 passes through co-axial bores in the clamp cone member and in the screw cap as well as the longitudinal slot indicated at I and loosely in the extension of the screw cap is locked under An object of this invention is to provide an imthe screw. engaging a threaded hole in the end of cap I.

This conical clamp device after mounting constitutes a self-enclosed unit with which a suspension device and contact terminals for the drain 5 wires may be united. In the exemplified embodiment shown, the screw cap 0 has at the top the form of a bolt support or screw upon which a terminal cap may be screwed as indicated at I. This cap I is suspended from a wire clip I. (Fig. 10 2) which is held by an egg-shaped insulator chain It. The screw cap I also serves to establish fixed connection between lead-oi! wire ll and the clamp device or terminal.

The action of the arrangement is as follows: u

The clamp cone member 4 inserted underneath the braided cover I presses the latter. after the clamp nut I has been shifted over and after it has been screwed fast with the cap t, with great force against the conical inside surface of the clamp nut. In this manner the extraction of the braided cover i which alone supports the entire weight of the cable and occasionally also ilexural strains thereof is prevented. The inside conductor I is brought out of the screw 'cap I through the inside bore so that there is suillcient play or clearance. and connected with the terminal screw 8 so that thus perfect relieving of stress of the slender inside conductor without compressive or bending eil'ects is insured.

Having described my invention, what I claim as novel and desire to secure by Letters Patent is! 1. Means for supporting a vertically depending cable having an outer metallic braiding and a central insulated conductor without strain on the a central conductor, comprising in combination a hollow nut tapered internally and in contact with the outer surface of said braiding, a wedge between the insulation and the interior surface of said braiding, a hollow member having an internally threaded portion engaging said nut and a reduced shoulder portion adapted to engage the end of said wedge to thereby expand the end of said braiding and maintain it firmly in contact with the tapered surface of said nut, screw means for securing the upper end of the central conductor to the upper surface of said hollow member in the absence of tension in said conductor, a vertically depending supporting member engaging the upper portion of said hollow member and serving as a supporting means for said cable and a lead wire clamping means intermediate the last two members for providing a conductive connection between said conductor and an external circuit. ll

2. A connecter device comprising the combination of a cable having an outer metallic sheath extending along substantially its entire length and serving as a shielding means, an inner conductor insulated therefrom, a clamp nut tapered to engage said sheath and having a central aperture passing said inner conductor, a tapered wedging member inserted between the insulation and the outer metallic sheath of said cable, a member provided with screw means wedging said tapered member longitudinally of said cable, said last named member being hollow and passing said inner conductor, securing means arranged to secure said conductor to the end of said last named member, a supporting member engaging the upper portion of the last named member and serving as a supporting means for the cable and a lead wire clamping means positioned between the supporting member and the last named member for providing a conductive connection between the conductor and an external circuit.

WOLFGANG OEDING.

Images