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. 22, 1993
Filed:
Jan. 17, 1991
Applicant:
Inventors:
Richard F Frankeny, Austin, TX (US);
Jerome A Frankeny, Taylor, TX (US);
Thai Q Ngo, Austin, TX (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B26D / ; H01H / ;
U.S. Cl.
CPC ...
361156 ; 83 761 ; 83575 ; 3611691 ;
Abstract
A power management circuit for operating a magnetic repulsion punch comprising a storage capacitor arranged to be connected in parallel with an inductive load serving as an operating coil of the magnetic repulsion punch, a means for selectively and temporarily coupling the inductive load to the storage capacitor for forming a resonant circuit, and a means for charging the storage capacitor after each operation.