APPARATUS FOR PROTECTING PLASMA HEAD Russian patent published in 1997 - IPC

FIELD: automated apparatuses of manufacturing equipment for heat cutting of metallic sheets and blanks. SUBSTANCE: apparatus includes measuring electronic unit 5 arranged on heat-insulation disc base 4 supporting with annular gap current conducting screen 9 in the form of truncated cone connected by means of current conducting jumper 10 with coil of eddy current pickup 3. Pickup 3 is placed in opening of disc base. Said disc base is mounted with possibility of raising and descending relative to plasmatron 1 by means of recoil spring 11 and pneumatic cylinder 12 whose working cavity is connected by pipeline with vessel for compressed air. Current conducting screen 9 is provided with ventilation branch pipe 19 for suction off emanation of plasma cutting process. EFFECT: improved design. 2 dwg