Electricity: electrical systems and devices – Electric charge generating or conducting means – Modification of environmental electric charge
Reexamination Certificate
2007-02-20
2007-02-20
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Electric charge generating or conducting means
Modification of environmental electric charge
C361S230000
Reexamination Certificate
active
10875982
ABSTRACT:
An ionizer includes an alternating current (AC) voltage source having an output outputting a waveform with a positive half-cycle and a negative half-cycle, an electrode electrically coupled to the output of the AC voltage source, a reference proximate the electrode and a sensing circuit. The sensing circuit includes a return current nulling node electrically coupled to the output of the AC voltage source and the reference, a ground node separately electrically coupled to ground, a positive ion current sensor and a negative ion current sensor. The positive ion current sense node is configured to output a positive ion signal proportionate to a sensed positive ion current. The negative ion current sense node is configured to output a negative ion signal proportionate to a sensed negative ion current.
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Foo Ken S.
Gorczyca John A.
Jacobs Michael A.
Croll Mark W.
Donovan Paul F.
Illinois Tool Works Inc.
Jackson Stephen W.
Patel Dharti H.
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