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:
Nov. 14, 1989
Filed:
Aug. 21, 1987
Applicant:
Inventors:
Hiroyuki Kataoka, Tokyo, JP;
Tosiyuki Kumakura, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
3152 / ; 315151 ; 354415 ;
Abstract
In a flash photographing apparatus, a flash device is arranged to slow the rise of flashing characteristic thereof at the initial stage of flashing. To attain this purpose, the electric charge of a first capacitor is impressed via an inductance onto a flash tube at the initial stage of flashing. Following this, the electric charge of a second capacitor is directly impressed on the flash tube without passing through the inductance.