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. 21, 1984
Filed:
Apr. 09, 1981
Koji Watanabe, Hachioji, JP;
Michio Yagi, Hachioji, JP;
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Abstract
A variable illumination flash apparatus includes a main capacitor in parallel with a flash lamp and power source for normally supporting triggered discharge illumination of the lamp. A plurality of secondary circuits each containing a series-connected silicon controlled rectifier and secondary capacitor are disposed in parallel with the main capacitor and are individually selectively actuatable to store additional electric charge for further supporting lamp illumination. Each secondary circuit is actuated only when additional illumination is required for a subequent flash operation, thereby promoting efficient conservation of the power source in that no power is drawn from the source and stored in the capacitors unless needed for the immediately subsequent flash operation.