Camera equipped with light blocking door opening and closing mec

Details Camera equipped with light blocking door opening and closing mec Camera equipped with light blocking door opening and closing mec

1996-09-03

1998-06-02

Gray, David M.

Photography

Camera detail

Detachable or removable film holder unit

396538, 396543, G03B 1724

Patent

active

057615594

ABSTRACT:
An opening and closing apparatus for opening and closing a light blocking door provided at a film feed slot of a film cartridge comprises a drive device that drives the light blocking door to open and close, a single switch that outputs a signal with a specific pattern with a light blocking door opening and closing operation of the drive device and a control device that controls the drive device based upon the output signal from the switch. The switch, for instance, includes a switch pattern that is integrated with a rotating member constituting the drive device and a brush that slides on the switch pattern as the rotating member rotates.

REFERENCES:
patent: 5612760 (1997-03-01), Okuno

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