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:
May. 10, 1977
Filed:
Nov. 10, 1975
Lyle R Strathman, Cedar Rapids, IA (US);
Robert A Bolin, Marion, IA (US);
Vincent B Collins, Cedar Rapids, IA (US);
Ronald L Swanson, Cedar Rapids, IA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
A system for generating respective X and Y beam deflection command signals as respective running binary counts in X and Y deflection counters utilizing digital computations based on the straight line expressions Y=X tan .alpha., where .alpha. is the line slope. Relative clock rates are defined by the tan .alpha. relationship therebetween, and, by defining a line as lying in one of eight 45.degree. octants, and a circle as successive points of tangency of a plurality of lines tangent to the circle comprising circumferential segments in eight contiguous ones of the octants, the system effects generation of respective X and Y counts to trace a line of selected length and slope as well as a circle of selected radius utilizing but a single table of tangents for angles between 0.degree. and 45.degree. as the required data storage.