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. 15, 1981
Filed:
Jan. 04, 1980
Roger Delpretti, Vernier, CH;
Ateliers des Charmilles, S.A., Geneva, CH;
Abstract
A process and apparatus for increasing the frequency of the effective machining electrical discharges between the electrode workpiece and the electrode tool of an EDM apparatus. The process of the invention consists in monitoring the electrical parameters in the machining zone between the electrodes such as to detect short circuits, and, when a short circuit is detected, in continuing monitoring the electrical parameters until monitoring indicates the disappearance of the short circuit, in cutting off the ongoing electrical discharge after a predetermined time interval following the moment at which said short circuit disappears and in re-establishing normal electrical voltage pulses after another time interval following the end of the discharge. The invention also provides appropriate apparatus for practicing the process.