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:
Nov. 24, 1998
Filed:
Jan. 27, 1997
Yoshiyuki Nakano, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A mirror operating device for speeding up a photographic operation cycle in a camera having a reflecting mirror for viewfinder observation. The reflecting mirror is movable between a first position blocking a photographic optical path and a second position aside from the photographic optical path. An electromotive drive source moves the reflecting mirror to the first position from the second position after an exposure to view a subject in a viewfinder. The time required for performing a mirror lowering operation is improved by controlling operation of a shutter mechanism and the electromotive drive source to move the reflecting mirror according to specific timing operations. The opening of the shutter mechanism is controlled according to a signal from a first delay device, and the start of the electromotive drive source to drive the mirror is started in response to a signal from a second delay device. The signals from the first delay device and the second delay device are output with respect to a reference signal such that the electromotive drive source starts moving the mirror before the shutter mechanism is finished closing, at a time that the reflecting mirror substantially does not obstruct the photographic optical path until the closing of the shutter mechanism finishes.