FOCAL PLANE SHUTTER WITH GROUPS OF SHUTTER BLADES IN IMPROVED ARRANGEMENT

• Main Authors: NAKAGAWA T,JA, ONDA E,JA, KOYAMA M,JA
• Format: Patent
• Language: English
• Published: 10.12.1974
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS

A focal plane shutter for a camera having two groups of shutter blades. One group opens the shutter and the other closes it. The groups each have a slit-forming shutter blade translated on a pair of levers. The remaining blades of each group are pivoted and pivotally actuated. The slit-forming shutter blades each have a straight edge moved across the shutter aperture normal to a plane traversing the shutter aperture so that the exposure aperture is accurately developed as the shutter is opened or closed. The slit-forming shutter blades are disposed remotest from each other with the remaining pivoted blades of both groups are disposed therebetween. The paired levers of each group are mounted outwardly of the corresponding slit-forming blade and outwardly of the two groups of shutter blades in an improved arrangement.