Apparatus for detecting gaseous discharge in vacuum furnaces

Details Apparatus for detecting gaseous discharge in vacuum furnaces Apparatus for detecting gaseous discharge in vacuum furnaces

1991-06-21

1993-03-09

Reynolds, Bruce A.

Industrial electric heating furnaces

Resistance furnace device

With internal atmosphere control

373109, 373117, 373128, 136230, 174151, 338 26, 374 24, F27D 706

Patent

active

051931001

ABSTRACT:
An electrically heated vacuum furnace is provided with special lead-through devices for transmitting current to the heating elements. In order to recognize gas discharges which can occur between a lead-through and a tank wall, the insulation of the lead-through is surrounded by an auxiliary electrode. A thermocouple can also be used instead of an auxiliary electrode. A signal derived from the auxiliary electrode can be used to shut off the furnace power to avoid damage thereto.

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patent: 4982055 (1991-01-01), Pollack et al.

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