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:
Nov. 11, 1980
Filed:
Aug. 30, 1979
Saburo Numata, Urawa, JP;
Shinichiro Fujino, Urawa, JP;
Fuji Photo Optical Co., Ltd., Omiya, JP;
Abstract
In a photographic camera provided with an exposure control circuit including a light measuring circuit which measures scene brightness and a memory circuit which memorizes the output of the light measuring circuit, a switching circuit is connected between the light measuring circuit and the memory circuit. The switching circuit is connected with a time constant circuit so that the switching circuit may be turned off to lock the memory memorized in the memory circuit when the time determined by the time constant circuit has lapsed since the power source is turned on. In a preferred embodiment, the time constant circuit is further connected with the output of the light measuring circuit so that the time determined by the time constant circuit is varied in accordance with the scene brightness.