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:
Oct. 06, 1987
Filed:
Sep. 26, 1986
Applicant:
Inventors:
Takashi Kobayashi, Suita, JP;
Yuji Maruyama, Suita, JP;
Assignee:
West Electric Company, Ltd., Osoki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; G03B / ;
U.S. Cl.
CPC ...
354416 ; 3152 / ;
Abstract
An electric flash device for photography is controlled of its light radiation of a flash tube by a transistor, which is connected in series with the flash tube and is given its base current through a parallelly connected capacitor and resistor, and when the transistor turns OFF, an electric charge stored in the capacitor is applied across the base and the emitter of the transistor as a reverse bias.