FR854643A - Système et dispositif pour empêcher l'échauffement du support guidefilm dans les appareils de projection cinématographique
- Google Patents
Système et dispositif pour empêcher l'échauffement du support guidefilm dans les appareils de projection cinématographique
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Microtecnica SRL
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Microtecnica SRL
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Publication of FR854643ApublicationCriticalpatent/FR854643A/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
G03B21/16—Cooling; Preventing overheating
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Physics & Mathematics
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General Physics & Mathematics
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FR854643D1938-05-141939-05-12Système et dispositif pour empêcher l'échauffement du support guidefilm dans les appareils de projection cinématographique
ExpiredFR854643A
(fr)