Adjustable grid line device

Details Adjustable grid line device Adjustable grid line device

1975-02-20

1976-02-24

Martin, Jr., William D.

Geometrical instruments

Miscellaneous

Light direction

33103, B43L 1300

Patent

active

039395642

ABSTRACT:
This device consists primarily of parallel spaced apart bars which through brackets, bolt, spring and wingnut fastenings will adjust to adapt to a painting canvas, the parallel members having equally spaced apart slot means in which will be received thread so as to form grid lines for the purpose of copying, enlarging or decreasing photographs, paintings, pictures, plans and the like from one area to another.

REFERENCES:
patent: 353919 (1886-12-01), Charman
patent: 1183977 (1916-05-01), Hoefle
patent: 1509703 (1924-09-01), Bourgeois
patent: 1622229 (1927-03-01), Ormiston
patent: 1821252 (1931-09-01), Woods
patent: 2370741 (1945-03-01), McDonnell
patent: 2451207 (1948-10-01), Ferguson

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