Apparatus for drafting in accurate conic perspective

Details Apparatus for drafting in accurate conic perspective Apparatus for drafting in accurate conic perspective

B - Operations, Transporting

43

M

33/19, 33/69

B43M 11/02 (2006.01) B43L 13/04 (2006.01) B43L 13/14 (2006.01)

Patent

CA 1061539

ABSTRACT OF THE DISCLOSURE Apparatus for drafting in accurate conic pers- pective. It essentially comprises at the top edge of the drawing board a movable cursor integral by means of an arm with a pivot and carrying at the other end a scale G3. Another scale G1 is slidably mounted on a sectional mem- ber pivoting about a pivot. The apparatus furthermore comprises another scale G2 whose zero mark coincides with pivot. Said apparatus serves the purpose of determining automatically on scale G3 by means of readings and bearings taken on the various scales the position of the point re- presenting in perspective a point of the dimensioned plan view situated in the left-hand portion of the apparatus.

271017

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