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:
Jun. 02, 1981
Filed:
Dec. 19, 1979
Masao Koenuma, Tokyo, JP;
Asahi Seimitsu Kabushiki Kaisha, Tokyo, JP;
Abstract
A universal parallel ruler is disclosed. It is an arm-type ruler and includes a first base attached to a drawing board, a first arm attached to the first base, a second base attached to the opposite end of the first arm, a second arm attached on one end to the second base, and a third base attached to the opposite end of the second arm. The third base includes a lead having an x-scale and y-scale attached thereto. The scales define an (x,y) coordinate system. When the x and y scales are horizontal and vertical, respectively, a point (X,Y) may be selected on a set of (x,y) coordinate axes defined by the scales. If the scales are tilted by .theta. degrees, the position of the point (X,Y) may be determined along a new set of coordinate axes defined by the tilt angle .theta. of the scales and may be identified by a new coordinate point (x,y) relative to the new coordinate axes as follows: