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:
Feb. 07, 1978
Filed:
Jun. 10, 1976
Applicant:
Inventors:
Werner Ullmann, Locarno, CH;
Ernst Buhler, Tenero, CH;
Assignee:
A.G. fur industrielle Elektronik, Losone near Locarno, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
219 / ; 219 / ; 307360 ; 328147 ;
Abstract
A pulse generator for use in forming the erosion pulses of an electro-erosion machine tool comprises means for forming two envelope curve signals representing upper and lower limit levels for the instant level of the output pulse, a comparing device for comparing the actual current level of the output pulse with the envelope curve signals, and a current supply for forming the pulse under the control of a switch which is turned on and off by the comparing means in such a way as to maintain the output pulse current level in the region represented by the space between the envelope curves.