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:
Apr. 16, 1985
Filed:
Sep. 30, 1982
Applicant:
Inventor:
Richard M Ulvila, Salem, NH (US);
Assignee:
Centronics Data Computer Corporation, Hudson, NH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ; B41J / ;
U.S. Cl.
CPC ...
3461 / ; 346 29 ; 3461 / ; 400 17 ; 400 18 ;
Abstract
In the calligraphic printing apparatus disclosed herein, a writing stylus is carried by a flexing suspension including a pair of generally orthogonal arms, each arm being driven by a respective servo system which responds to stored data representing characters to be written. The naturally arcuate path defined by each arm is substantially linearized by mixing into the drive signal for each servo system a compensating signal which is a function of the absolute value of the position signal controlling the servo system for the other arm.