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:
Apr. 09, 1985
Filed:
Jun. 17, 1983
Applicant:
Inventor:
Yoshiyuki Takematsu, Tokyo, JP;
Assignee:
Fuji Koeki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
3152 / ; 315171 ; 315240 ; 3541451 ;
Abstract
A photographic flash device comprising a grip portion and a flash unit removably attachable thereto. Both the grip portion and flash unit house battery-powered DC-DC converters which cooperate upon attachment of the flash unit to the grip portion in charging a main discharge capacitor. A source switch permits charging of the discharge capacitor by only one of the DC-DC converters, and a safety switch prevents operation of at least one of the converters when the flash unit is not attached to the grip portion.