Mechanism for counting film frames in camera with multiple expos

Details Mechanism for counting film frames in camera with multiple expos Mechanism for counting film frames in camera with multiple expos

1981-02-10

1982-10-26

Adams, Russell E.

354289, G03B 1736

Patent

active

043558771

ABSTRACT:
A camera mechanism for counting film frames in a camera capable of operating in both normal and multiple exposure modes. A shutter charging mechanism is coupled to a winding lever mechanism so as to be charged for each operation of the winding lever. A film winding mechanism is coupled through a gear structure which includes a ratchet and pawl arrangement wherein the film winding mechanism is engaged with the winding lever mechanism for a multiple exposure position of a multiple exposure operating member and disengaged therefrom for a normal position of the multiple exposure operating member. A first switch is actuated for each operation of the winding lever while a second switch is operatively coupled to the multiple exposure operating member. A counting circuit counts the number of times the first switch is operated except when inhibited by the second switch when the multiple exposure operating member is in the multiple exposure position.

REFERENCES:
patent: 3829876 (1974-08-01), Uno et al.
patent: 4021828 (1977-05-01), Iura et al.
patent: 4191463 (1980-03-01), Urano et al.
patent: 4247189 (1981-01-01), Date et al.

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