welding torch
Torch for joining metal parts using a flame produced by burning gas.
mixing chamber 
Part of the torch where acetylene and oxygen are mixed. The proportion and flow of the gases, regulated by the valves, determine the flame’s properties.
acetylene valve 
Valve controlling the volume of acetylene entering the torch.
tip 
End of the head tube; combustion takes place where it opens.
head tube 
Detachable part conducting the gaseous mixture to the nozzle.
handle 
Rigid tube containing the conduits for the welding gas; it also makes the torch easy to handle.
oxygen valve 
Valve controlling the volume of oxygen introduced into the welding torch.