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:
Sep. 21, 1976
Filed:
Nov. 03, 1975
Ross W Johnston, Norristown, PA (US);
Barrie W Witty, Glenside, PA (US);
Sperry Rand Corporation, New York, NY (US);
Abstract
A printhead assembly, having an individual print hammer and actuator assembly for every other column of line print, includes a low mass hammer and a hairpin spring coupled to the hammer rear portion, and an actuator assembly with side arms meeting at the arm tip for rapidly impacting characters on a type band. A plural flexure spring assembly provides uniform stress during actuator assembly movement and enables hammer and actuator positional adjustment to be made by frontal access, and a slotted bearing assembly inclines each print hammer at a slight angle off the perpendicular to the print line and the plane of the record medium.