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. 09, 1996
Filed:
Aug. 26, 1994
Takamasa Sakamoto, Osaka, JP;
Akihiro Baba, Sakai, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A field frame changeover mechanism suitable for a single-lens reflex camera, which allows clear confirmation of the photo range without increasing the size of the camera. The mechanism has darkening plates movable between a darkening position where the plates cover a part of the focusing screen and an open position where the focusing screen is uncovered by the plates. When the mirror which reflects the light transmitted from the photo-taking lens of the camera to the optical system of the viewfinder of the camera moves from an observation position located in the path of light transmitted through the photo-taking lens to a photo-taking position, the darkening plates retract from the locus of the mirror's movement in a correlated manner.