Patent US3513281 - SWITCHING ARRANGEMENT AND DEVICE FOR THE AUTOMATIC LIFTING OF ARC PLASMA TORCHES

Citing Patent	Filing date	Issue date	Original Assignee	Title
US4280042	22 Jan 1980	21 Jul 1981	L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude La Soudure Autogene Francaise	Process and installation for automatic ignition of a plasma cutting torch
US4780591	5 Mar 1987	25 Oct 1988	The Perkin-Elmer Corporation	Plasma gun with adjustable cathode
US5545873	9 Nov 1994	13 Aug 1996	Howmet Corporation	Variable control of weld torch parameters

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