Patent ID: 6410879
Filing Date: 2002-06-25
Classification: H05H

Abstract:
A device with a plasma torch, which comprises(a) a receiver made from an electrically non-conducting material, (b) two rod-shaped non-consumable electrodes held in nozzles in the receiver, (1) the electrodes enclosing an acute angle, (c) a counterelectrode associated with the non-consumable electrodes, (d) a separate voltage source connected to each non-consumable electrode and the voltage sources being also connected to the counterelectrodes, each voltage source having a plus pole and a minus pole, one of the non-consumable electrodes being connected to the plus pole and the other non-consumable electrode being connected to the minus pole, (1) the voltage sources supplying direct voltage pulses having a level exceeding at least the arc voltage of an arc between the non-consumable electrodes, (e) mutually locked switching devices preventing a simultaneous voltage supply from the voltage sources to the non-consumable electrodes and supplying voltage at different polarization to the non-consumable electrodes, and (f) a gas supply connected to the nozzles.