The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1983
Filed:
Jul. 21, 1982
John N Antonevich, Lansdale, PA (US);
The Simco Company, Inc., Hatfield, PA (US);
Abstract
A controlled emission static eliminator system (wherein an A.C. high voltage is applied to the discharge electrodes of a static bar by way of a transformer) employs a biasing circuit in series with the primary of the transformer to control the amplitude and/or duration of the alternating potentials imposed on the corona discharge points. The biasing circuit includes a series-connected diode and variable resistance in one leg of a parallel network and a capacitor in the other leg. Selecting appropriate time constants for the resistance and capacitance will narrow the first half of the sine wave and broaden the second half to produce an excess of positive or negative ions, as desired, depending upon the direction of the diode. The ion emission can be controlled to yield an equal number of positive and negative ions or a predominance of ions of one polarity and can be accomplished regardless of whether the A.C. high voltage is directly connected or capacitively coupled to the points.