Radiant energy – Photocells; circuits and apparatus – Combined with diverse-type device
Patent
1985-05-28
1987-03-17
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Combined with diverse-type device
70DIG51, 354354, 355 72, H01J 4014
Patent
active
046509879
ABSTRACT:
An apparatus for the prevention of the unintentional exposure of photo material includes an electromagnetically locking flap on an apparatus designed as a storage chest for photo material. The flap as a cover for said chest and a photocell or the like respond to the luminosity of the environment. In the case of the prevalence of an adequate darkness a solenoid affects the magnet so as to unlock the cover.
REFERENCES:
patent: 3198883 (1965-08-01), Borberg et al.
Koch Robert J.
Westin Edward P.
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