1984-12-06
1989-11-21
Mathews, A. A.
354249, 354250, G03B 936
Patent
active
RE0331171
ABSTRACT:
A camera shutter mechanism for opening and closing a shutter aperture to effect an exposure comprises a group of opening blades movable, when released, from a closed position covering the shutter aperture to an open position uncovering the shutter aperture to thereby initiate an exposure, and a group of closing blades movable, when released, from an open position uncovering the shutter aperture to a closed position covering the shutter aperture to thereby terminate the exposure. A release mechanism releases the opening blades thereby enabling them to move to the open position for initiating the exposure, and subsequently releases the closing blades thereby enabling them to move to the closed position for terminating the exposure. A driving member automatically operates immediately after completion of the exposure to move the group of opening blades back towards the closed position so that the aperture is at least partially covered thereby so as to improve the light-shielding capability of the shutter mechanism.
REFERENCES:
patent: 3628434 (1971-12-01), Leitz
patent: 3810223 (1974-05-01), Kitai et al.
patent: 3825940 (1974-07-01), Hayami
patent: 3829878 (1974-08-01), Onda et al.
patent: 3903538 (1975-09-01), Yoshizaki
patent: 3946413 (1976-03-01), Onda et al.
patent: 3999196 (1976-12-01), Inoue
patent: 4150890 (1979-04-01), Nakagawa et al.
patent: 4264177 (1981-04-01), Kitai et al.
Onda Eiichi
Watanabe Masanori
Adams Bruce L.
Mathews A. A.
Seiko Koki Kabushiki Kaisha
Wilks Van C.
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