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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
G03B21/00—Projectors or projection-type viewers; Accessories therefor
G03B21/14—Details
G03B21/16—Cooling; Preventing overheating
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FR426382D1910-02-241911-02-23Dispositif pour empecher l'inflammation des films dans les cinématographes et appareils analogues
ExpiredFR426382A
(fr)
Perfectionnements apportés à la construction des supports pour pellicules de cinématographes ou d'appareils analogues, et à l'établissement des pellicules destinées à etre employées avec ces supports ou avec des dispositifs analogues
Dispositif rationnel fonctionnant automatiquement sur tous les genres de projecteurs cinématographiques pour protéger le film contre tout danger d'ignition