FR493847A - Procédé et dispositif pour la cinématographie scientifique permettant la projection de fragments de film immobilisés sans danger d'incendie ou de carbonisation pour le film
- Google Patents
Procédé et dispositif pour la cinématographie scientifique permettant la projection de fragments de film immobilisés sans danger d'incendie ou de carbonisation pour le film
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CHARLES VELSEN
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CHARLES VELSEN
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Application filed by CHARLES VELSENfiledCriticalCHARLES VELSEN
Application grantedgrantedCritical
Publication of FR493847ApublicationCriticalpatent/FR493847A/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
G03B21/00—Projectors or projection-type viewers; Accessories therefor
G03B21/14—Details
G03B21/18—Fire preventing or extinguishing
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR493847D1917-01-151918-03-29Procédé et dispositif pour la cinématographie scientifique permettant la projection de fragments de film immobilisés sans danger d'incendie ou de carbonisation pour le film
ExpiredFR493847A
(fr)
Procédé et dispositif pour la cinématographie scientifique permettant la projection de fragments de film immobilisés sans danger d'incendie ou de carbonisation pour le film
Procédé et dispositif pour la cinématographie scientifique permettant la projection de fragments de film immobilisés sans danger d'incendie ou de carbonisation pour le film