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:
Dec. 08, 1981
Filed:
Dec. 10, 1979
Yasumasa Tomori, Sakado, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A lens barrel automatic focalization device for a camera in which the camera body furnishes a focalization operational force in which the rotational resistance force produced by the focalization operation is made constant over various lenses so that the response time of the focalization operation is made uniform. The camera body includes a mount and a rotary member rotatably mounted on the camera body on a shaft perpendicular to the optical axis of the camera at the lower center portion of the mount. The focalization device includes a rotary member positioned so as to be rotatable by the rotary member of the camera body with the rotational force of the rotary member being coupled to a rotary cylinder having threads engaged with the threads of a movable sleeve or cylinder. The rotary cylinder is mounted within a stationary cylinder with ball bearings being provided therebetween. Rotational movement of the movable cylinder is restrained by a regulating cylinder fixed to the supporting cylinder and having guide pins which extend into corresponding longitudinal guide slots on the outer surface of the moving cylinder.