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. 28, 2000
Filed:
Dec. 05, 1997
Applicant:
Inventors:
Takuji Magara, Nagoya, JP;
Takashi Yuzawa, Nagoya, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B23H / ; B23H / ;
U.S. Cl.
CPC ...
219 6916 ; 219 6919 ;
Abstract
In machining, a short-circuit determination reference time stored in a parameter memory is changed by a short-circuit determination reference time changing device in response to rpm or a rotational speed of a rotating electrode, duration of a short-circuit detected between the electrodes is measured by a short-circuit duration time determining device, and a short-circuit evading operation is executed by a short-circuit back control device in a case where the duration of a short-circuit has surpassed the short-circuit determination reference time.