US1543998A - Connection of electric conductors - Google Patents

Description

June so,- 1925. v ,7 1543.!

E. GINDRE I COINBCTION 01" ELECTRIC CONDUCTORS Fil ed. April 14, 1924 I7. lmdr d m Patented June 30, 1925.

EUGENE ommm, ormvatnorsaraaaar, Eamon, ASSIGNOR rosocm'm 'ANONYME LA CARBONE, OF LEVAILLDIS-FERRET, FRANCE. I

CONNECTION or ELECTRIC CONDUCTORS.

Application filed April 14, 1924. Serial No. 706,552;

To all whom it may concern:.

Be it known that I, EUGENE G'INDRE, 12 and 33 Rue de Lorraine, Levallois-Perret, Seine. Francehave invented Improvements in or Relating to the Connection of Electric Conductors,of which the following is a full, clear, and exact description.

The present invention has reference to the connection of electric conductors and more particularly to the fixing of metallic conductors in members formed of a material such as carbon or graphitio composition.

The object of the invention is to provide l a perfect electric contact and an extremely strong or solid attachment, irrespective of the heat or vibration to which the connection may be subjected; moreoverthe connection is simple, rapid and economical in its use.

The present invention briefly stated'consists in forming in one conductor a socket having at its base a peripheral cavity, inserting in the socket a metallic capsule, .part of which is pressed into said cavity, and fixing the end of the other conductor within the capsule.

With a view to giving a clear idea of the subject matter of this invention one method.

of carrying out the invention will now be described with reference-to the accompanying drawing, in which c Figure 1 shows in section the introduction of the capsule into the socket in a carbon brush for example. c

Figure 2 represents the in the brush.

Figure 3 shows the completed connection partly in section and partly in elevation.

As shown in the drawings, in the brush a there is formed a socket b and in the base of this latter there is a circular peripheral cavity 0. Into this socket there is introduced a friction tight capsule (l preferably of red copper. Then into this capsule there is introduced a mandril c having a shoulder or abutment f which bears upon the edge of the open end of the capsule of (Figure 1).

This mandril is lowered as shown by the capsule mounted I arrow in Figure 1, and in its downward movement exert-s, by means of the shoulder f, a compressive action upon the upper edge of the capsule, which is thus pushed down to the bottom of the socket b and its lower part is forced into the peripheral circular cavity 0 Figure 2. This forcing down of the metal thus causes an intimate and firm contactbetween thebrush and the capsule d.

The metal cable 7 is afterwards engaged in the capsule d thus mounted in the brush a and is fixed therein either by forming a bezel round a part of the capsule which may protrude from the socket as is shown in Figure 3 or by soldering or in some other suitable way.

With a view to ensuring,-still more completely, the electric contact of the capsule with the brush "the well of the socket b may he coppered or.,a conductive metallic powder may be introduced into this hole before the capsule d is embedded therein.

The connecting arrangement of this invention has the following leading advantages:

I 1. From the electrical point of view the end of the cable and the capsule, forced into the substance of the brush, constitute a connection the loss in contact of which is reduced to a minimum. It is furthermore protected against all external influences and is not exposed to deterioration byheating of the brush.

2. From the mechanical point of View the connection is simple, quick and economical to effect. It is very solid and is perfectly immune from the action of heat and vibration to which the connection may be subjected. It is furthermore to be remarked that the mounting of the cable may be made on all faces or on all sides of the brush as it is only necessary to cut a socket in the latter for each connection; in addition to this the clamping of the capsule in the brush being effected in the cent-re of the brush its solidity is not impaired.

The end of the capsule projecting from the face of the brush may be utilized for carrying protective sleeves or other devices of conducting or insulating material.

The manner of forming a connection constituting the subject matter of the present invention may be adapted to various applications and form, the dimensions and the structural details of the parts constituting the connecting device may be modified according to its particular application.

Claims 1. A method for attaching electric conductors, and intended more specifically for attaching electric cables to carbon brushes,

conductor is to be attached, providing at the base of said blind opening a circular peripheral cavity, engaging in said blind opening a cap the height of which is greater than the depth of the latter, so that said cap will project from the blind opening, forcing said lower part of the cap into the circular peripheral cavity provided at the base of the blind opening, engaging in said cap a conductor the diameter of which is substantially equal to the internal diameter of the cap, and atlixing the electric conductor directly in this latter.

2. A method for attaching electric conductors, and intended more specifically for attaching electric cables to carbon brushes. said method consisting in providing a blind opening in the member to which the electric conductor is to be attached, providing at the base of said blind opening a circular peripheral cavity, engaging in said blind o ening a cap the height of which is greater than the depth of the latter, so that said cap will project from the blind opening forcing said lower part of the cap into the circular peripheral cat'ity provided at the base of the blind opening, engaging in sale cap a conductor the diameter of which is substantially equal to the internal (ll2l1116t0" of the cap and fastening to the conductor the end of the cap projecting from the blind opening.

3. A device for connecting electric conductors and particularly for fixing a metallic conductor to a member formed of a material such as carbon or a graphite composition, comprising: a socket provided in the member on which must be secured the electric conductor and having at its base a circular peripheral cavity,a capsule inserted in this socket in such conditions that its peripheral portion is pressed into this circular peripheral cavity of the socket and that its open end projects outside the said socket,ineans for securing in this capsule the end of the conductor to be connected.

The foregoing specification of my 1111- provements in or relating to the connection of electric conductors, signed by me this 3d day of April 1924.

EUGENE GINDRE.

Images