method and device for ignition of a hochfrequenzplasmabrenners

摘要

A safe, convenient ignition arrangement is described for a "cold" plasma burner adapted, e.g., to effect a finishing surface-hardening operation on a grounded metallic workpiece. Argon or other plasma-forming gas is subjected to an electromagnetic field in an elongated ionization chamber. The resulting ionized gas passes through a working gap formed between an output nozzle of the conductive chamber and an elongated electrode mounted axially in the chamber. A remotely located switch is operative to complete an electrical path to ground through the gap and the electrode, thereby igniting the ionized gas.