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. 10, 1979
Filed:
Aug. 19, 1977
Kuniyoshi Suzaki, Machida, JP;
Akira Ashida, Yokohama, JP;
Takashi Itani, Yokohama, JP;
Tateo Yamada, Yokohama, JP;
Masaya Maeda, Kawasaki, JP;
Kiyoshi Takahashi, Kunitachi, JP;
Hiroyuki Takimoto, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a lens unit construction for motion picture and other type projectors. The unit is provided with a motion picture projecting lens construction, a mantle cover to be fixed on the fixing position of the motion picture projector body, a guide device for slidingly guiding and holding the lens construction holding device on the device plate in such a manner that the construction holding device is slidable only along the direction of the optical axis of the lens construction and an adjusting device for operating the slide motion of the construction holding device. The construction holding device or the adjusting device is provided with a cam follower pin while the other is provided with a focus adjusting cam groove in which the cam follower pin is engaged. An engaging device guides the cam follower pin so that it can be easily introduced into the cam groove at the time of assembling the construction holding device with the adjusting device to form one body and for preventing the cam follower pin from being easily brought out of the cam groove in such a manner that the construction holding device is cooperatively coupled with the adjusting device.