Perspective drawing machine

Details Perspective drawing machine Perspective drawing machine

1988-05-16

1990-02-13

Cuchlinski, Jr., William A.

Geometrical instruments

Straightedge type

Base attached

33 1K, 33433, 33434, B43L 1314

Patent

active

048994545

ABSTRACT:
A drafting table includes vertical and horizontal straight edged supports together with drive mechanisms for moving the vertical straight edge such that it will always point to a viewing point and for moving the horizontal straight edges in plural different modes. In a first mode, the two horizontal straight edges are moved such that their edges always point to respective vanishing points. In a second mode the horizontal straight edges are moved such that one continues to point to a vanishing point while the other maintains a fixed angle with respect to horizontal, and so that their edges always intersect at a point along the line of view. The drive mechanisms for the horizontal straight edge supports can be disabled, reversed or their drive ratios changed in accordance with the particular drawing being made.

REFERENCES:
patent: 2380073 (1945-07-01), Robinson
patent: 2667694 (1954-02-01), McQuaid, Sr. et al.
patent: 2669025 (1954-02-01), Hysing
patent: 2901832 (1959-09-01), Hulen
patent: 3343267 (1967-09-01), Wolf
patent: 3719995 (1973-03-01), Sauvageau
patent: 4453318 (1984-06-01), Hayes

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