The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1977
Filed:
Sep. 12, 1975
Jun Shimomura, Tokyo, JA;
Nippon Kogaku K.K., Tokyo, JA;
Abstract
An exposure control device in a camera comprises light intercepting means disposed between a picture-taking lens and a film and in the light path of the picture taking lens and retractable out of the light path by operation of a shutter release member, electro-optic light control means disposed in the light path of the picture-taking lens and having its transmittivity to light variable by an electrical signal, and control means operable in response to the retracting movement of the light intercepting means out of the light path to apply a first signal to the light control means for increasing its transmittivity, apply a second signal to the light intercepting means for returning the same to the light path in order to terminate the exposure of the film to light, and apply a third signal to the light control means for decreasing it transmittivity to a minimum.