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:
May. 17, 1977
Filed:
Sep. 15, 1975
Applicant:
Inventors:
Nobuyoshi Inoue, Kawagoe, JA;
Munetaka Shimizu, Kawagoe, JA;
Assignee:
Copal Company Limited, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354266 ; 354235 ;
Abstract
An electric shutter comprising a front blade actuating lever, a signaling lever engageable with said front blade actuating lever and a rear blade actuating lever capable of releasing said signaling lever so that the signaling lever may rotate fully in a predetermined range only at the time of such state that the rear blade actuating lever begins to move prior to the front blade actuating lever by the shutter release and the photographer may be informed by the rotation of the signaling lever of the fact that the exposing operation of the shutter is not being properly made.