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. 06, 1991
Filed:
Apr. 23, 1990
Applicant:
Inventor:
Shinji Hirata, Toyonaka, JP;
Assignee:
West Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
3152 / ; 315340 ; 354416 ;
Abstract
An electric flash apparatus of the present invention has an Insulated Gate Bipolar Transistor (I.G.B.T.) for controlling the light emission actuation of the strobe tube (Xe), which is connected to the strobe tube in series, a switching element (11) for supplying a driving signal to the I.G.B.T. from a main capacitor (C.sub.M), and a gate circuit (14) for controlling actuation of the switching element (11), which is connected across both ends of the strobe tube (Xe), and is actuated by a switch circuit (17) for actuating a trigger circuit (20). And the actuation of the switching element (11) is kept by turning on of the I.G.B.T.