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:
Dec. 04, 1984
Filed:
Feb. 14, 1984
Applicant:
Inventor:
Yoshiyuki Takematsu, Tokyo, JP;
Assignee:
Fuji Koeki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315151 ; 354415 ; 354416 ; 3541271 ; 35412711 ; 3152 / ;
Abstract
A test flash device in a photographic flash discharger which includes a photometric circuit including an integrator and exposed to light emitted from a flash discharger tube and reflected by an object to be photographed. A light emission stopping circuit is provided to stop light emission in response to a signal from the photometric circuit. A display circuit is provided to present a change in display when light emission stops. A test flash circuit is provided which regulates the time of light emission during test flashing to a predetermined short time.