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:
Oct. 31, 1978
Filed:
Jul. 02, 1976
Applicant:
Inventor:
Goro Hasegawa, Fuchu, JP;
Assignee:
Canon, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 51 ; 354 / ; 354243 ; 354256 ; 354258 ; 354234 ;
Abstract
In the disclosed shutter system, a standby mechanical shutter control operates a shutter in response to failure of the power source of a primary electrical shutter control. Normally the power source enables the electrical shutter control to time and operate the shutter. More specifically, in the disclosure, a standby mechanical timer responds to the failure of a power source to actuate a magnet in an electrical automatic timing arrangement, and operates the shutter for a fixed period.
Hasegawa, Goro. (1978). Electrically controlled photographic shutter (U.S. Patent No. 4123766). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4123766
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile