Process of striking an arc for a plasma beam inside an enclosure and a stick-electrode for carrying out the process

A process of striking a plasma beam at high temperature, which is practiced in an enclosure with two torches having nozzles and located at opposite ends of the said enclosure and outside said enclosure and windows associated with the torches, which comprises introducing a stick-electrode lengthwise through the window associated with one of the torches and brought near the opposite torch until the plasma hooks to the stick-electrode, thereby closing between the nozzle of the one torch and the stick-electrode a circuit of superimposed current, pulling the stick-electrode out progressively from the enclosure, carrying with it the plasma beam until it meets with a second torch which is energized at the very moment the extraction of the stick-electrode is completed, in order to transfer the superimposed current to its nozzle, and disconnecting the stick-electrode and closing the laminar plasma flow circuit.