Camera which can regulate the exposure area of a frame of film

Details Camera which can regulate the exposure area of a frame of film Camera which can regulate the exposure area of a frame of film

G - Physics

03

B

95/67

G03B 17/00 (2006.01) G03B 17/02 (2006.01) G03B 19/04 (2006.01)

Patent

CA 1264591

ABSTRACT OF THE DISCLOSURE: A whole frame/half frame camera has a push bar extending outside the camera body to allow the activation of a regulating plate inside the camera body. When actuated, the plate moves in a fixed orbit to be positioned in one of two positions. In one position, the plate causes a view shield device to shield a portion of the view area on two sides of a viewfinder, and induces a pair of opaque movable blades to shield an exposure window also from two sides. In this position the plate also activates a clutch device for con- trolling a film advance wheel such that the wheel will rotate only a half cycle for each photograph taken, so reducing the length of film wound to one half of the length that is wound for a whole frame photograph.

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