Abnormal condition detection device for corona discharger in ele

Details Abnormal condition detection device for corona discharger in ele Abnormal condition detection device for corona discharger in ele

1984-01-13

1986-04-22

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3CH, 361 29, G03G 1502

Patent

active

045838364

ABSTRACT:
An electrophotographic copying machine including some corona dischargers each having a high voltage transformer and an abnormal condition detection device. The abnormal condition detection device includes a detection unit for detecting an output level at a secondary winding of the transformer, an input unit for inputting an input voltage to a primary winding of the transformer. A comparator is provided for comparing the output level on the detection unit with the input level on the input unit, and outputting a detection signal. A control circuit of the copying machine is responsive to the level of the detection signal for controlling the operation of the copying machine.

REFERENCES:
patent: 3772568 (1973-11-01), Phillips
patent: 4272183 (1981-06-01), Maese et al.
patent: 4398819 (1983-08-01), Schron
patent: 4417804 (1983-11-01), Werner, Jr.
patent: 4454559 (1984-06-01), Shenoy

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