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:
Oct. 04, 1983
Filed:
Jun. 18, 1981
Applicant:
Inventors:
Robert W Arnold, Glen Aubrey, NY (US);
Dean W Skinner, Binghamton, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307270 ; 307494 ; 307228 ; 307240 ; 328147 ;
Abstract
A constant energy drive circuit comprises two interconnected chopping circuits successively operable to control the current in a coil of an electromagnetic actuator. One chopping circuit operates during the rise time portion of the operating interval, the other operates beginning with the occurrence of a predetermined peak current and for remainder of the operating interval of fixed duration.