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:
Mar. 14, 1978
Filed:
Jul. 11, 1975
Toshikazu Ichiyanagi, Tokyo, JA;
Hideto Iwama, Kawasaki, JA;
Noritsugu Hirata, Yokohama, JA;
Kazuo Ishikawa, Kawasaki, JA;
Hidekazu Okajima, Kawasaki, JA;
Masamichi Toyama, Machida, JA;
Mamoru Shimazaki, Tokyo, JA;
Tomoshi Takigawa, Machida, JA;
Canon Kabushiki Kaisha, Tokyo, JA;
Abstract
A self-timer for cinecameras wherein an electric delay circuit is used for detecting a length of time from the release to the commencement of a photographing process which takes place with an electric power having been actually supplied to a film feeding motor. The amount of the rotation made by the film feeding motor from the start of the rotation of the motor is either mechanically or electrically detected. When the detected amount of rotation reaches a preset value corresponding to a number of frames of the film required for self-timer photographing, the motor is stopped to terminate the photographing operation, so that the photographing operation with the self-timer can be accomplished exactly for a preset number of frames.