Handheld viewer for transparency film

Details Handheld viewer for transparency film Handheld viewer for transparency film

1983-10-24

1985-01-01

Mancene, Gene

Card, picture, or sign exhibiting

Photographic transparency viewer, e.g., x-ray viewer

Hand held slide viewer

40364, 40366, 350241, G02B 2702

Patent

active

044914342

ABSTRACT:
A compact, handheld viewer adapted for use with photographic transparencies which are located within a film cassette in roll form, in a strip containing a plurality of individual scenes, or individually mounted transparencies. The viewer includes a manually operable drive system for selectively driving either a film take-up reel, for withdrawing film from a film cassette and advancing it through a projection station, or a film spool for rewinding the film into the film cassette.

REFERENCES:
patent: 2520432 (1950-08-01), Robertson
patent: 2550799 (1951-05-01), Fuller
patent: 3104483 (1963-09-01), Thompson
patent: 3218745 (1965-11-01), Golden
patent: 3672756 (1972-06-01), Kinsinger
patent: 4081920 (1978-04-01), Magee
patent: 4234244 (1980-11-01), Klein
patent: 4371249 (1983-02-01), Czumak et al.
patent: 4372068 (1983-02-01), Knapp et al.
patent: 4375324 (1983-03-01), Holmes
patent: 4390257 (1983-06-01), Fernekes

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