A process for the preparation of a tulip contact tulip contact produced and, according to this method.

摘要

Process for the manufacture of a bell housing of the contacts from a blank constituted by a tube made of material with good conductive properties and good elasticity, comprising a thinned portion provided with parallel longitudinal slits and terminated by a ring made of a material having a good electrical conductivity and good resistance to the effects of the electric arc, characterized in that it comprises the following operations: & br / - there is placed said blank (1) around a cylindrical core (10) having a diameter substantially equal to the diameter of the blank and a length equal to that of the blank, the top of the core into abutment on the crown, & br / - there is disposed around the blank and to the right of the slots a block (5) of annular cross section having an inside diameter close to a little greater than the outside diameter of the blank and a height substantially equal to that of the slots, the block being made of an elastomer material, & br / - there is exerted on the surfaces of the ends of said block a pressure which tends to reduce the inside diameter of said block so as to obtain the desired width of the slit.