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:
Sep. 30, 1980
Filed:
Sep. 26, 1977
Applicant:
Inventor:
Raymond G Wilkins, Hanover, NH (US);
Assignee:
Thermal Dynamics Corporation, West Lebanon, NH (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
2191304 ; 2191 / ;
Abstract
A plasma torch system is provided which creates a pilot arc having high instantaneous power and low average power. The pilot arc ignition circuit reduces the pilot arc duty cycle by pulsing on the pilot arc and then extinguishing it. A plasma torch disclosed also reduces RF noise in the line by eliminating the additional spark gap typically used in the power supply circuit and by placing the triggering circuit on or adjacent the torch handle.