FR344087A - Appareil automatique pour la projection des annonces lumineuses sur les parois des tunnels ou les murs des tranchées longeant les voies de chemins de fer, tramways
- Google Patents
Appareil automatique pour la projection des annonces lumineuses sur les parois des tunnels ou les murs des tranchées longeant les voies de chemins de fer, tramways
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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
G03B23/105—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier drum or disc carrier disc carriers
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FR344087D1904-06-171904-06-17Appareil automatique pour la projection des annonces lumineuses sur les parois des tunnels ou les murs des tranchées longeant les voies de chemins de fer, tramways
ExpiredFR344087A
(fr)
Appareil automatique pour la projection des annonces lumineuses sur les parois des tunnels ou les murs des tranchées longeant les voies de chemins de fer, tramways