Apparatus for drafting inaccurate conic perspective

Details Apparatus for drafting inaccurate conic perspective Apparatus for drafting inaccurate conic perspective

1977-02-02

1978-10-03

Haroian, Harry N.

Geometrical instruments

Scriber

Curved line

B43L 1314

Patent

active

041175999

ABSTRACT:
The apparatus for drafting in accurate conic perspective essentially provs for the top edge of a 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 guide member pivoting about a pivot. The apparatus further comprises another scale G2 whose zero maker coincides with the pivot. The 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 representing in perspective a point of the dimensioned plan view situated in the lefthand portion of the apparatus.

REFERENCES:
patent: 695747 (1902-03-01), Lydick
patent: 3226831 (1966-01-01), Tauernier

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