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:
Apr. 06, 1976
Filed:
Jul. 16, 1974
Haruo Tateno, Kiyose, JA;
Rikagaku Kenkyusho, , JA;
Abstract
Disclosed is an improved method and apparatus for operating an arc-transfer type torch having a cathode rod and two coaxial annular bodies. According to this invention an inactive gas is supplied to the annular space between the cathode rod and the inner annular body, at a very small flow rate, and an active gas such as oxygen is supplied to the annular space between the inner and exterior annular bodies at a relatively large flow rate. The plasma is composed of an active gas of high concentration heated by a transfer arc. In the method of this invention dross-less cutting is performed. Also an arc current can be increased without deforming the cathode rod of the torch, and therefore the cutting speed can be increased by raising the arc current.