Drawing apparatus

Details Drawing apparatus Drawing apparatus

1976-03-22

1977-02-22

Skogquist, Harland S.

33277, G09B 1106, G09B 1110

Patent

active

040085287

ABSTRACT:
A drawing apparatus to assist in providing an artist with a true perspective of the scene viewed on a transparent surface viewed through a fixed eyepiece, the transparent surface being the concave side of a spherical segment encompassing about 60.degree. of arc which approximates the normal cone of vision.

REFERENCES:
patent: 691138 (1902-01-01), Hawley
patent: 989240 (1911-04-01), Folmer
patent: 1514296 (1924-11-01), McCallum
patent: 3311017 (1967-03-01), Eckholm

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