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. 07, 1978
Filed:
Apr. 26, 1976
Applicant:
Inventors:
Hiroshi Iwata, 0SAKA, JA;
Katsuji Ishikawa, Higashi-Osaka, JA;
Assignee:
West Electric Co., Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 31 ; 354 / ; 354 29 ; 354 44 ; 354 / ;
Abstract
The invention discloses a programme-controlled shutter of the type in which a control circuit controls an exposure control mechanism consisting of a stepping motor and a plurality of shutter blades which also function as aperture setting blades in such a way that the exposure control mechanism sets the optimum aperture for the optimum time interval in response to the brightness of a subject, whereby the optimum exposure is ensured.