A GAS COOLED CATHODE FOR AN ARC TORCH

摘要

PCT No. PCT/AU91/00017 Sec. 371 Date Jul. 14, 1992 Sec. 102(e) Date Jul. 14, 1992 PCT Filed Jan. 17, 1991 PCT Pub. No. WO91/11089 PCT Pub. Date Jul. 25, 1991.A gas cooled cathode for a direct current plasma torch. The cathode has a tip connected to a body. A gas passage for working gas passes through the body of the cathode, passes proximate the tip and exits the body adjacent the tip. The cathode is spaced apart from and insulated from the anode by means of a collar of insulation material.