Card retrieval device

Details Card retrieval device Card retrieval device

G - Physics

03

B

186/12

G03B 21/00 (2006.01) G06K 17/00 (2006.01) H04N 1/00 (2006.01) H04N 1/047 (2006.01) H04N 1/10 (2006.01) H04N 1/387 (2006.01) H04N 1/40 (2006.01) H04N 7/18 (2006.01)

Patent

CA 1110982

ABSTRACT OF THE DISCLOSURE A film card retrieval device for use in an automatic microfilm display apparatus is provided with a switch for sensing that a film card has been retrieved. In the event the device fails to retrieve a film card, the absence of a switch output signal causes the control apparatus to repeat the card retrieval routine.

323629

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