Projection apparatus

Details Projection apparatus Projection apparatus

1988-07-05

1990-06-26

Haroian, Harry N.

Optics: image projectors

Selective data retrieval

353 26A, G03B 2100

Patent

active

049366777

ABSTRACT:
A projection apparatus for selecting one of a plurality of cartridges each of which stores an information recording medium and for projecting information of the information recording medium stored in a selected one of the cartridges includes a first cartridge reception member for holding the cartridge in a first position, a second cartridge reception member for holding the cartridge in a second position, an optical system for projecting information of the information recording medium onto a predetermined position, a detector for detecting the presence/absence of the cartridge in the first and second cartridge reception members, and a retrieval control circuit for controlling the first and second cartridge reception members to cause the optical system to project the information of the information recording medium of the cartridge first detected by the detector.

REFERENCES:
patent: 3164059 (1965-01-01), Turrentine
patent: 3179001 (1965-04-01), Silverman
patent: 3614022 (1971-10-01), Henriksen
patent: 3646258 (1972-02-01), Lemelson
patent: 4025176 (1977-05-01), Lopata
patent: 4160169 (1979-07-01), Endicott
patent: 4353642 (1982-10-01), Weigert
patent: 4373918 (1983-02-01), Berman

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