Film counter for cameras

Details Film counter for cameras Film counter for cameras

1988-02-26

1989-06-13

Gellner, Michael L.

G03B 1736

Patent

active

048396788

ABSTRACT:
A film counter indicator dial is journalled in a camera door and carries frame count indicia visible through a window in the door. The dial has peripheral gear teeth to form a worm gear which, when the door is closed, is meshed with a worm which is coupled to a sprocket wheel to be driven by film in both advance and rewind directions of movement. The worm and sprocket wheel are carried by a pressure plate and the dial is driven only when the door is closed. When the door is opened, the dial is returned to an initial position by a spring-urged lever which is engaged with a cam formation on the dial.

REFERENCES:
patent: 2591417 (1952-04-01), Frye
patent: 3011419 (1961-12-01), Takahama
patent: 3057277 (1962-10-01), Swarofsky
patent: 3459110 (1969-08-01), Papke
patent: 4021828 (1977-05-01), Iura et al.

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