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. 12, 1980
Filed:
Jun. 20, 1978
Tadashi Nakagawa, Yotsukaido, JP;
Ichiro Nemoto, Yotsukaido, JP;
Seiko Koki Kabushiki Kaisha, , JP;
Abstract
A camera shutter has a control member movable when the shutter is released for successively actuating an opening member and a closing member to effect the taking of an exposure. A delay mechanism coacts with the control member to effect the selective setting of a range of exposure times including a minimum exposure time by which the control member actuates the opening and closing members without interaction of the delay mechanism, a next to the minimum exposure time by which the control member engages with the delay mechanism prior to actuating the opening and closing members, and one or more longer exposure times by which the control member actuates the opening member and then engages with the delay mechanism prior to actuating the closing member. The engagement of the control member and delay mechanism prior to actuation of the opening and closing members, in the next to the minimum exposure time mode, compensates for unstable motion of the control member at the initial stage of movement thereof under control of the delay mechanism thereby ensuring exposure accuracy.