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:
Apr. 24, 1990
Filed:
Jul. 07, 1989
Tadashi Nakagawa, Chiba, JP;
Nobuo Shinozaki, Chiba, JP;
Hiroyuki Koizumi, Chiba, JP;
Hiroshi Yamazaki, Chiba, JP;
Hiroyuki Saito, Chiba, JP;
Katsuhiko Matsushita, Chiba, JP;
Miyoshi Tanikawa, Chiba, JP;
Seikosha Co., Ltd., Tokyo, JP;
Abstract
A camera having a lens shutter and a focal-plane shutter, includes a selector circuit for selecting either a lens shutter mode or a focal-plane shutter mode; a first driving device for controlling either the programmed exposure value of the lens shutter or the size of the aperture, the first driving device including a motor and an actuating member driven by the motor, the actuating member including a peripheral surface with a first cam for controlling the programmed exposure value of the lens shutter in response to forward rotation of the motor, and a second cam for controlling the size of the aperture in response to reverse rotation of the motor, the first cam having an inclination in a first direction and the second cam having a less steep inclination in an opposite direction; a pivotally mounted opening lever connecting the lens shutter to the actuating member, the lever defining a first arm and a second arm, the first arm in engagement with the actuating member and the second arm connected with the lens shutter, a first pin on the first arm which rides on the cams, and a second pin on the second arm to pivotally connect with shutter blades of the lens shutter; a spring biasing the first pin into engagement with the cams; a second driving device controlling the time of operation of the focal-plane shutter mode; and a sequential control circuit controlling the driving devices.