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Publication of FR647970ApublicationCriticalpatent/FR647970A/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
G03B9/00—Exposure-making shutters; Diaphragms
G03B9/08—Shutters
G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
G03B9/18—More than two members
G03B9/22—More than two members each moving in one direction to open and then in opposite direction to close, e.g. iris type
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR647970D1927-01-251928-01-27Obturateur pour appareils photographiques
ExpiredFR647970A
(fr)