C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
327/116, 38/19,
C21D 1/38 (2006.01) C23C 8/36 (2006.01) G05D 23/20 (2006.01) H01J 37/32 (2006.01)
Patent
CA 1092954
ABSTRACT High current glow discharge treatment in which workpieces are heated to a predetermined processing temperature and then maintained at this temperature by measuring the temperature of the workpieces, forming the time derivative of this temperature, comparing this derivative with a reference value, and adjusting the current of the glow discharge accordingly. The time derivative of the temperature and the reference signal are compared in a comparator which supplies a signal to a proportional-plus-integral regulator for regulating the current of the discharge. The reference signal is provided by a comparator having one input connected to temperature measuring points on the workpiece and the other input connected to a signal having an adjustable predetermined value.
271944
Klockner Ionon Gmbh
Marks & Clerk
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