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:
Jul. 13, 1982
Filed:
May. 01, 1981
Keiji Yamazaki, Sakai, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
In a camera automatic diaphragm control device of the type wherein scene light is measured through the diaphragm aperture during the stopping-down operation thereof, which is arrested when the measured light value reaches a given level with respect to manually set exposure parameters, thereby determining the diaphragm aperture, structure is provided for positively ensuring that the diaphragm aperture is left fully open when the set exposure parameters and the measured light require such diaphragm aperture setting. The diaphragm aperture control device is employed in a single lens reflex camera with a reflex mirror retractable from a viewing position at selected times in dependence on whether the diaphragm aperture remains fully open or is reduced.