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:
Jul. 05, 1983
Filed:
Aug. 11, 1980
Sunao Ishizaka, Tokyo, JP;
Toshiaki Hozumi, Tokyo, JP;
Nippon Kogaku K.K., Tokyo, JP;
Abstract
In an interchangeable lens having a mount mountable on a camera incuding an electric circuit associated with exposure control and a displaceable actuating member for correcting the electric circuit so as to be accommodated to the focal length of the interchangeable lens mounted, a signal member is provided projectedly from one end of the mount and engageable with the actuating member so as to cause said displacement when the interchangeable lens is mounted on the camera. The signal member has an engaging end portion engageable with the actuating member. The engaging end portion lies at a position determined relative to the mount for displacing the actuating member by an amount related to the logarithm of the focal length of the interchangeable lens.