A dual mode plasma arc torch is provided that preferably comprises a start cartridge disposed between an electrode and a tip. In one form, the start cartridge comprises an initiator that is in electrical contact with the electrode and that is resiliently biased into contact with the tip, such that when...http://www.google.es/patents/US6936786?utm_source=gb-gplus-sharePatente US6936786 - Dual mode plasma arc torch
