Magnetic cropper

Details Magnetic cropper Magnetic cropper

1987-11-27

1989-08-08

Cuchlinski, Jr., William A.

Geometrical instruments

Straightedge type

Plural straightedges, relatively moveable

33DIG9, 33DIG1, 33427, 355126, G03D 1500

Patent

active

048540498

ABSTRACT:
A photographic cropper comprises a pair of opposable right-angle portions, each of which contains alternating transversely spaced strips of oppositely magnetized material extending parallel to edges of that portion. The right-angle portions are continuously adjustable relative to each other in the direction of the strips and are relatively adjustable in a direction perpendicular to the strips in equally spaced steps corresponding to the spacing between similarly magnetized strips of each portion.

REFERENCES:
patent: 1245821 (1917-11-01), Thompson
patent: 1642232 (1927-09-01), Edwards
patent: 2626467 (1953-01-01), Abbott
patent: 2822736 (1958-02-01), Padgett
patent: 3198047 (1965-08-01), Munz
patent: 3561748 (1971-02-01), Schefers
patent: 3878615 (1975-04-01), Peterson
patent: 4274459 (1981-06-01), Galajda
patent: 4564414 (1986-01-01), Houssian et al.
patent: 4599798 (1986-07-01), Steele
patent: 4638569 (1987-01-01), Dove
patent: 4672747 (1987-06-01), Turner

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