1978-04-24
1979-04-17
Corbin, John K.
40364, 350 90, G02B 2702, G09F 1130
Patent
active
041497767
ABSTRACT:
A relatively compact, inexpensive and portable viewer for reading photogric reductions, such as microfiche film cards, includes a cylindrical translucent diffuser tube which provides for entry of sufficient light under usual ambient conditions for viewing the film; a transparent cylindrical mounting tube axially centered within the diffuser tube; and a slide tube axially and longitudinally movable, by hand operation, within the transparent mounting tube. The slide tube forms an optical path comprising a rectangular opening in its wall near one of its ends which acts as a film gate, a reflecting mirror positioned in line with the wall opening, a magnification lens and an eyepiece lens. The film is inserted in the cylindrical gap formed between the diffuser tube and the mounting tube and the slide tube is moved so that the desired portion of the film may be viewed, enlarged and read.
REFERENCES:
patent: 2674152 (1954-04-01), Wilkinson
patent: 3710488 (1973-01-01), Baxter
patent: 3887270 (1975-06-01), Lazarus et al.
Corbin John K.
Edelberg Nathan
Murray Jeremiah G.
Punter Wm. H.
Sharp Daniel
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