Camera with film scroll detection mechanism

Details Camera with film scroll detection mechanism Camera with film scroll detection mechanism

1996-09-30

1997-12-02

Blankenship, Howard B.

Photography

With film drive

Film movement limiting means

G03B 118

Patent

active

056946317

ABSTRACT:
A film scroll detection mechanism for a camera does not require a large encoder for use in controlling the scrolling of the film, while still producing a large number of pulse signals, thereby allowing a camera to be made smaller. A connection mechanism links a film scroll detection roller and a pulse signal generator. The connection mechanism causes an encoder of the pulse signal generator to rotate through a larger angle in comparison to the rotation of the aforementioned film scroll detection roller. This allows the encoder to be made with a smaller radius than previous devices. Additionally, the connection mechanism permits the axis of rotation of the encoder to be offset from the axis of rotation of the film scroll detection roller, which allows for a further reduction in the size of the camera.

REFERENCES:
patent: 4482227 (1984-11-01), Shiozawa et al.
patent: 4954859 (1990-09-01), Kitazawa

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