B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
164/2, 158/27, 7
B23K 7/08 (2006.01)
Patent
CA 1041303
ABSTRACT OF THE DISCLOSURE In apparatus for welding or cutting stainless steel or other metal alloys, separate supplies of combustible gas such as acetylene, and oxygen, are fed to a nozzle. A second oxygen path from the source to the nozzle is directed through a pressure regulating valve and a metallic flux powder regulating valve wherein it is mixed with metallic flux and trained in a third flow of oxygen. A safety valve is provided to prevent explosion of the metallic flux supply tank in the event of backfire occurring through the apparatus. The safety valve is arranged to cut off the oxygen supply which carries the metalli? flux so the regulating valve, in the event that the gas pressure in the metallic flux tank does not equal that of the oxygen supply. A heat fusible closure seal is provided in the metallic flux tank, so that in the event that backfire reaches this tank, the seal is broken thus exhausting the pressurized oxygen from the tank and triggering the safety valve to cut off further oxygen supply to the tank.
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