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:
Feb. 21, 1978
Filed:
Sep. 22, 1976
Hiroshi Ueda, Nara, JA;
Akira Yoshizaki, Osaka, JA;
Minolta Camera Kabushiki Kaisha, Osaka, JA;
Abstract
An exposure control mechanism for a camera which includes a light measuring circuit having a photosensitive element disposed for receiving scene light reflected at substantially the entire area of both the surface of a film and a leading curtain of a focal plane shutter after the light has passed through an objective and a diaphragm. An operable member is provided for moving a light restricting member from a non-operative to an operative position where the member respectively permits the scene light reflected at the entire area or the scene light reflected at a small predetermined area of the surface to be received by the photosensitive element. An alternative light measuring circuit has a plurality of photosensitive elements respectively disposed for receiving the scene light reflected at different small predetermined areas of the surface. In this case, switches are provided for selectively activating the photosensitive elements of the light measuring circuit.