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:
Mar. 16, 1982
Filed:
Feb. 15, 1980
John F McDonald, Clifton Park, NY (US);
Henry A Scarton, Troy, NY (US);
Warren C Kennedy, Pittsburgh, PA (US);
Paul B Crilly, Ft. Collins, CO (US);
Rensselaer Polytechnic Institute, Troy, NY (US);
Abstract
Sudden changes in arc current are slowed to mitigate the resulting noise. A sensor detects large decreases in current during initial stages of arc quench and actuate circuits to maintain ionization and current flow to avoid sharp final drop that causes loud noise impulse. Ionization can be maintained by supplying RF energy at appropriate frequency to the arc electrodes and/or by increasing the arc voltage. The sophisticated control algorithm is implemented utilizing an inexpensive microprocessor to exert proper control of arc sustaining parameters to mitigate arc quenching impulse noise.