Viewer for microreproduction on a transparent film

Details Viewer for microreproduction on a transparent film Viewer for microreproduction on a transparent film

1974-11-08

1976-05-18

Smith, Alfred E.

401061, G02B 2702

Patent

active

039573583

ABSTRACT:
A device for viewing microreproductions on a transparent film has a lens and a film supporting means which has a pair of frame members adapted to clamp the film therebetween through magnetic attraction of one of the frame members to the other, either the lens or the film support being slidably movable with respect to the other for focusing purposes.

REFERENCES:
patent: 499380 (1893-06-01), Franz

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