Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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ROBERT H RICHARDSON
Original Assignee
ROBERT H RICHARDSON
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Filing date
Publication date
Application filed by ROBERT H RICHARDSONfiledCriticalROBERT H RICHARDSON
Application grantedgrantedCritical
Publication of FR487458ApublicationCriticalpatent/FR487458A/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
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR487458D1917-11-071917-11-07Perfectionnements aux volets de machine pour tableaux cinématographiques
ExpiredFR487458A
(fr)