Bierman and Muserlian
Film detection member for a single-use camera
 A single-use camera which is loaded with a film cartridge, having a light-shielding cover on a film gate, when the single-use camera is assembled. The camera includes: the film cartridge for accommodating a photographic film; a film-winding knob, capable of rotating, for winding the photographic film; a film detection member for detecting the photographic film at a position outside the film cartridge in the camera; and a mechanism for moving the light-shielding cover to a closed position where the light-shielding cover closes the film gate when the film detection member detects absence of the photographic film at the position. 
Konica Corporation
G G
G03B G03B
additional inventional
Hiroshi Tetsufumi Shizuo Kazuyoshi Masami Masaru
Kibayashi Takaba Ishii Sugano Fujita Yamazaki