Thermal Dynamics Corporation

Victor Equipment Company

Roger W Hewitt

Kevin D Horner-Richardson

Joseph P Jones

Christopher John Conway

Kevin J Kinerson

Shiyu Chen

David A Small

Steve Norris

Ken Isenor

A plasma arc torch includes an electrode, a tip, a third element, and a secondary power circuit. The electrode is disposed within the plasma arc torch and adapted for electrical connection to a cathodic side of a power supply. The tip is positioned distally from the electrode and adapted for electrical connection to an anodic side of the power supply during piloting. A plasma chamber is formed between the electrode and the tip. The third element is disposed near a proximal end of the plasma chamber. The secondary power circuit is disposed proximate the plasma arc torch and in electrical communication with the third element. The secondary power circuit is configured to generate a high voltage pulse on the third element using input to secondary power circuit to initiate a first arc to start the plasma arc torch.

Plasma arc torch with secondary starting circuit and electrode

A tip for a plasma arc torch includes a ridge for improved electrical contact with a starting member.

Tips and contact members having ridges for use in a contact start plasma arc torch

Torch, lead and connector assembly

Growing community of inventors

Plainfield, NH, United States of America

Roger W Hewitt