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:
Jun. 14, 1988
Filed:
Feb. 28, 1986
Applicant:
Inventor:
Kuang-Ta Ho, Charlotte, NC (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23H / ;
U.S. Cl.
CPC ...
219 / ; 219 / ;
Abstract
The EDM power supply includes a normally operative roughing circuit and a finishing circuit which is switched into the power supply at an appropriate time. The time of switching is set by a detecting circuit which determines whether or not the machining pulse on time is equal or less than two microseconds or other predetermined time periods. Because the pulse on time for finishing is generally within the time range preselected, the following circuit is then enabled.