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. 14, 1987
Filed:
Jul. 29, 1985
Hiroyuki Kataoka, Tokyo, JP;
Canon Kabushiki Kaisha, , US;
Abstract
An electronic flash apparatus having a first trigger circuit for causing a main light source to start firing, a first capacitor for firing the main light source, a second trigger circuit for causing a preliminary light source to start firing, a second capacitor for firing the preliminary light source, and a circuit for producing a trigger signal for preliminary lighting when a preliminary illumination is carried out, wherein the second capacitor is connected in common to the main and preliminary light sources, and there is provided a preliminary lighting changeover circuit responsive to selection of a bounced-flash mode for changing the application of the trigger signal from the second trigger circuit to the first trigger circuit.