Card – picture – or sign exhibiting – Photographic transparency viewer – e.g. – x-ray viewer – Hand held slide viewer
Patent
1979-10-22
1981-03-24
Pitrelli, John F.
Card, picture, or sign exhibiting
Photographic transparency viewer, e.g., x-ray viewer
Hand held slide viewer
40 19, 40367, 350 90, 350241, G02B 2702
Patent
active
042571804
ABSTRACT:
A portable microfiche viewer is provided for viewing a selected image frame of a microfiche arranged in a cylindrical configuration. The viewer comprises a cylindrical translucent outer wall, a cylindrical transparent inner wall positioned within the outer wall and a transparent cylinder adapted to be manually rotated and axially movable within the inner wall. A microfiche to be viewed is positioned on the periphery of the cylinder and is rotatable therewith for positioning a selected column of the microfiche into a viewing path or aperture extending perpendicularly to an optical path of a lens means mounted on the outer wall. The lens means is movable in a path parallel to the viewing path to a selected row of the microfiche for viewing the selected image frame of the microfiche directly through the lens means.
REFERENCES:
patent: 1097013 (1914-05-01), Genter
patent: 2553160 (1951-05-01), Arps
patent: 2674152 (1954-04-01), Wilkinson
patent: 3384436 (1968-05-01), Kunnel
patent: 3626617 (1971-12-01), Frey
patent: 3710488 (1973-01-01), Baxter
patent: 4089953 (1978-05-01), Bernard et al.
patent: 4149776 (1979-04-01), Everett, Jr.
AM International Inc.
Curfiss R. C.
Hopkins M. L.
Karambelas A. W.
Pitrelli John F.
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