| 摘要 |
An elongated viewing tube tapering from an enlarged viewing window mounting end to a narrower nozzle connected end. The nozzle includes a straight passage therethrough which defines a continuation of the viewing tube, and a branch passage which receives the electrode. Inert gas is introduced into the viewing tube adjacent the viewing window and moves through the viewing tube so as to meet with the gas from the torch tip at the weld puddle at which point the water is blown out of the end of the device so as to provide a clear view of the welding operation. An internal light is provided within the viewing tube and the outer end of the nozzle includes a flexible skirt which assists in excluding water.
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