Perspective drawing machine

Details Perspective drawing machine Perspective drawing machine

1980-01-03

1982-11-30

Phillips, Charles E.

Geometrical instruments

Straightedge type

Base attached

B43L 1314

Patent

active

043609759

ABSTRACT:
This invention relates to a perspective drawing machine and more particularly, to a machine which will keep track of a chosen vanishing point. Two machines are disclosed; one, a mechanical machine works to .+-.22.5 degrees with an error of .+-.4.7%. The second is an electronic machine that corrects for the above error and can have a much wider range. Both machines convert instantly from the left hand vanishing point to the right hand vanishing point and then to a standard drafting machine when required.

REFERENCES:
patent: 3714714 (1973-02-01), Bullard
patent: 3826007 (1974-07-01), Senshu et al.

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