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1. (WO2018132682) DISABLING PLASMA ARC TORCHES AND RELATED SYSTEMS AND METHODS

Pub. No.:    WO/2018/132682    International Application No.:    PCT/US2018/013531
Publication Date: Fri Jul 20 01:59:59 CEST 2018 International Filing Date: Sat Jan 13 00:59:59 CET 2018
IPC: H05H 1/34
B23K 9/10
B23K 10/00
Applicants: HYPERTHERM, INC.
Inventors: WU, Jing
ALTOBELLI, Bruce, P.
DUAN, Zheng
BOROWY, Dennis, M.
MAO, Junson
Title: DISABLING PLASMA ARC TORCHES AND RELATED SYSTEMS AND METHODS
Abstract:
In some aspects, methods of disengaging a plasma control circuit within a plasma arc torch of a plasma processing system to place the torch into a safety-locked mode can include providing: a plasma control circuit configured to convey a current from the plasma cutting system through the plasma arc torch to one or more consumables disposed in the torch and an operator interface switch connected to the plasma control circuit and configured to initiate generation of a plasma arc from the plasma arc torch; and activating a switch, separate from the operator interface switch, disposed on the torch and connected to the plasma control circuit to disconnect the plasma control circuit to limit the current, including pilot current, from flowing to the one or more consumables.