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:
Aug. 02, 1983
Filed:
Nov. 24, 1981
Applicant:
Inventors:
Keith B Davenport, Sandhurst, GB;
Roman Derc, Tarporley, GB;
Assignee:
International Computers Limited, Stevenage, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
400124 ; 101 9305 ; 4001572 ;
Abstract
Wire printing apparatus includes a print head having at least one print wire and associated actuating mechanism and drive circuit. In the drive circuit a capacitor is charged to a predetermined voltage through an inductance and then discharged through the coil of an electromagnet in the actuating mechanism. The current through the coil is arranged to rise and then fall. The circuit permits optimization to maximize the proportion of the energy input to the drive circuit which is transferred to the print wire.