Card – picture – or sign exhibiting – Photographic transparency viewer – e.g. – x-ray viewer – Hand held slide viewer
Patent
1994-11-03
1996-11-12
Chen, Jose V.
Card, picture, or sign exhibiting
Photographic transparency viewer, e.g., x-ray viewer
Hand held slide viewer
40367, 362253, 359798, 359803, G02B 2702, F21V 3300
Patent
active
055728146
ABSTRACT:
A hand-held microfilm reader comprises an elongate body formed by two parts connected together at one end and separated at the other ends to form a slot. A microfilm sheet can be inserted in the slot with a translucent screen being provided to one side of the slot and a magnifying system to the other side of the slot. An electric light bulb is provided behind the translucent screen to illuminate the screen and the sheet and a clamping device is provided for releasably clamping a sheet against the translucent screen when a required portion of the sheet is in the field of view of the magnifying device.
A translucent cover may be provided in the part carrying the screen to allow ambient light to the screen to illuminate a microfilm should the electric light system fail.
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Boram Frank
Boram John M.
Boram Frank
Boram John M.
Chen José V.
Hansen James O.
Projectron Ltd.
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