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:
Nov. 30, 2004
Filed:
Sep. 11, 2003
Applicant:
Inventors:
John Gorczyca, Lansdale, PA (US);
David D. Reagan, Wilmington, DE (US);
Assignee:
Illinois Tool Works Inc., Glenview, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 1/00 ;
U.S. Cl.
CPC ...
H02H 1/00 ;
Abstract
A method of offset voltage control for pulse mode ionization systems is provided wherein the ionization system has positive and negative power supplies. The duty cycle and overlap of outputs of the positive and negative power supplies are controlled, and an overlap that achieves a desired offset voltage is determined. The offset voltage and the corresponding overlap are stored in memory. The duty cycle and overlap of the outputs of the positive and negative power supplies are controlled to achieve the desired offset voltage based upon the stored offset voltage comparison.