Camera

Details Camera Camera

1989-12-14

1990-11-20

Gellner, Michael L.

Boots, shoes, and leggings

G03B 112

Patent

active

049722140

ABSTRACT:
A device for determining whether a film leader is inside or outside a camera housing includes a light emitting device, a light detection device, and a control circuit. The light emitting device is disposed on one side of the film and emits signal light. The light detection device is disposed on the same side of the film and detects when the signal light is blocked by two separate portions of the film. The light detection device also detects when the signal light is not blocked by the two film portions. The two film portions are separated from each other by predetermined distance. The control means emits a control signal when the light detection device detects the signal light, thus indicating that the film leader is inside the camera housing.

REFERENCES:
patent: 3519340 (1970-07-01), Vockenhuber et al.
patent: 4460256 (1984-07-01), Araki et al.
patent: 4504131 (1985-03-01), Kimura
patent: 4506965 (1985-03-01), Kitajima et al.
patent: 4632530 (1986-12-01), Iwata et al.

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