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. 24, 1981
Filed:
Mar. 26, 1979
Applicant:
Inventors:
Oliver A Bell, Jr, Statesville, NC (US);
Randall C Gilleland, Troutman, NC (US);
Davey J Chance, Concord, NC (US);
Assignee:
Colt Industries Operating Corp., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
219 / ; 219 / ; 219 / ;
Abstract
The system responds to the frequency of pulses from the pulse generator or multivibrator. As the frequency of the pulses increases, they get closer together and the average voltage changes in a somewhat linear fashion. A final integrator amplifier stage is used to find the predetermined maximum current level for different frequency settings. Responsive to this level being exceeded, machining power is interrupted and the EDM operation interrupted.