Patent
1977-08-26
1979-07-17
Gellner, Michael L.
354 43, 354232, 354266, 354271, 354272, G03B 708, G03B 902
Patent
active
041613546
ABSTRACT:
An automatic camera of the aperture control type wherein the lens stopping operation is carried out by detecting the variation in light quantity due to the lens stopping operation. The finder viewing mirror is raised when the light measurement is carried out, and when the quantity of light reaches a predetermined value, the lens stopping operation is stopped. A operating member which is operated by a magnet causes both the halting of the lens stopping operation and the top curtain releasing operation. After the running of the bottom curtain, the finder viewer mirror is lowered and lens aperture is rapidly opened wide. The rapid opening of the lens aperture is accomplished with a very simple mechanism including a unidirectional clutch which operatively couple gears of a slow speed mechanism for permitting rotation of some of the gears in the return direction when a control lever member, operatively connected to the operating member, is in engagement with the first gear.
REFERENCES:
patent: 3777637 (1973-12-01), Kuramoto et al.
patent: 3922963 (1975-11-01), Matsui
patent: 3964073 (1976-06-01), Kobori et al.
Asahi Kogaku Kogyo Kabushiki Kaisha
Gellner Michael L.
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