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:
Dec. 30, 1980
Filed:
Feb. 16, 1978
Applicant:
Inventor:
Roger Delpretti, Geneva, CH;
Assignee:
Ateliers des Charmilles S.A., Geneva, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
219 / ; 219 / ; 219 / ; 219 / ;
Abstract
Process and apparatus for eliminating short circuits occurring in the machining zone between an electrode workpiece and an electrode tool in the course of an electrical discharge machining operation. Short circuits, caused by bridging of the electrodes by metallic particles, are burnt by an auxiliary high intensity electrical discharge across the gap between the electrodes applied after a predetermined time interval, or time delay, from the beginning of a normal current pulse.