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:
Mar. 31, 1981
Filed:
Apr. 20, 1979
Applicant:
Inventors:
Kunio Arisaka, Urawa, JP;
Kenta Namioka, Tokyo, JP;
Assignee:
Copal Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 29 ; 354 / ; 354354 ;
Abstract
A program type electric shutter wherein a shutter blade which is also a diaphragm blade and is made to be able to latch an exposure warning indicating device to be inoperative just before the beginning of the opening of the shutter blade and a diaphragm device which can open and close a window for a light receiving element are operatively connected with each other in order to prevent the mis-indication of the exposure warning indicating device. This electric shutter is provided with an electric self-timer device and a flash controlling circuit.