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. 23, 1983
Filed:
Aug. 24, 1981
Yoichi Tosaka, Shakujii, JP;
Masanori Uchidoi, Yokohama, JP;
Yoshihiro Shigeta, Tokyo, JP;
Ryoichi Yoshikawa, Yokohama, JP;
Shosuke Haraguchi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A camera of the type having a winding motor is provided with a timer circuit which, after the lapse of a predetermined length of time, forcibly effects a supply of power to the winding motor when the shutter blades fail to travel in a normal way, and even when a signal corresponding to shutter blade travel completion is not obtained. The winding motor then resets the camera mechanisms which are arranged to perform various operations, such as shutter charging, mirror returning and film feeding, into their respective initial states. This eliminates the possibility of trouble resulting from such a malfunction of the camera that it becomes inoperative halfway through completion of photographing operation.