An automatic arc welding machine of the type which operates with rod electrodes. The electrodes (46), which are held in a welding head (28), are moved automatically with respect to the workpiece. The electrodes are moved longitudinally away from the workpiece in accordance with the arc voltage such that...http://www.google.fr/patents/US4952773?utm_source=gb-gplus-shareBrevet US4952773 - Automatic arc-welding machine operating with rod electrodes and a preferred application thereof
Automatic arc-welding machine operating with rod electrodes and a preferred ...
