Electric potential measuring device using oscillating...

Details Electric potential measuring device using oscillating... Electric potential measuring device using oscillating...

2007-03-09

2008-12-02

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S073000, C324S458000

Reexamination Certificate

active

07460803

ABSTRACT:
To provide an electric potential measuring device which is useful in realizing size reduction, high sensitivity, and high reliability. The electric potential measuring device includes: an oscillating device which includes torsion springs, and an oscillating body axially supported by the springs to oscillate; and signal detecting unit which is located on a surface of the oscillating body. A capacitance between the detection electrode and a surface of an electric potential measuring object is varied by varying a distance therebetween by the oscillating device, whereby an output signal appearing on the detection electrode is detected.

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