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:
Jul. 21, 1987
Filed:
Sep. 16, 1986
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
3542341 ; 354266 ; 3542711 ;
Abstract
A camera having a motor-driven diaphragm device comprises a diaphragm driving motor disposed within the camera; a diaphragm driving member which is driven by the motor to open or close the diaphragm aperture of a photo-taking lens; and a change-over switch to shift the rotating direction of the motor depending on the opening or closing of a switch which operates in association with a shutter release button. The diaphragm aperture is stopped down by the driving force of the motor when the release button is depressed and is opened to the fully open position thereof by reverse rotation of the motor when the release button is no longer depressed.