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Publication of FR757464ApublicationCriticalpatent/FR757464A/fr
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B23/00—Devices for changing pictures in viewing apparatus or projectors
G03B23/08—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier
G03B23/10—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier drum or disc carrier
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Physics & Mathematics
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FR757464D1933-06-241933-06-24Projecteur d'images à commande automatique
ExpiredFR757464A
(fr)