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. 09, 1983
Filed:
Aug. 28, 1981
Toshiyuki Yajima, Saitama, JP;
Syuzo Kimura, Saitama, JP;
Fuji Photo Optical Co., Ltd., Saitama, JP;
Abstract
A main lens carriage holding a main lens assembly is moved along the optical path by a cam cylinder. A supplemental lens element is operatively coupled with the main lens assembly at the proper position to attain the desired optical reduction ratio. When the main lens assembly deviates from the proper position, a main lens support frame is shifted along the optical path in and relative to the main lens carriage by a correcting mechanism so as to correct the deviation. A further supplemental lens element is provided, but does not move with the main lens assembly. Both supplemental lens elements swing into and out of the optical path under cam action; and further cam action is provided to ensure that the two swinging lens elements do not collide with each other. The main lens support frame is rapidly moved along the optical path by the cam action of a rotating cylinder having a cam groove having part-circular portions that define the desired dwell positions and having open ends.