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:
Aug. 31, 1976
Filed:
Jun. 11, 1975
Applicant:
Inventor:
Kunio Matsumoto, Ageo, JA;
Assignee:
Copal Company Limited, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 33 ; 354 34 ; 354 / ; 354139 ; 354149 ;
Abstract
An automatic flash-photographing arrangement whereby flash-photography is automatically carried out at a preset shutter speed when brightness of an object is lower than a pre-determined value, the arrangement comprising an automatic exposure control circuit, an electronic change-over switch means connected to said automatic exposure control circuit, and a flash illuminating circuit connected to said change-over switch means. The electronic change-over switch means comprises an adjustable RC delay circuit which can be set for the purpose of determining whether or not flash-photography has to be carried out.