Perspective drafting instrument

Details Perspective drafting instrument Perspective drafting instrument

1984-07-06

1986-01-21

Little, Willis

Geometrical instruments

Straightedge type

Base attached

33 1CC, 33 1K, 33434, B43L 1314

Patent

active

045650160

ABSTRACT:
A drafting instrument (14) is provided for drawing perspective lines without physically preestablishing and marking a vanishing point. A carriage (16) and drawing blade (18) are supported on roller means (20) for movement along a drawing surface. Control means (24) adjustably pivots the roller means such that each point along the drawing blade scribes an arc about a common point as the carriage moves. The drawing blade defines substantially parallel lines in perspective radiating substantially from the common point as a vanishing point as the carriage moves.

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