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:
Sep. 08, 1981
Filed:
Aug. 28, 1979
Applicant:
Inventor:
Kazuo Ikawa, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315151 ; 3152 / ;
Abstract
A control circuit for an electronic flash device is disclosed. The control circuit is connected to a commutating capacitor and includes a coil connected in parallel to the capacitor and switching means connected in the discharge path of the commutating capacitor to discharge the charge stored on the commutating capacitor after a switching device for stopping flash emission has changed from the conducting state to the non-conducting state.