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:
Feb. 18, 1986
Filed:
Apr. 02, 1984
Koji Suzuki, Tokyo, JP;
Eiichi Tano, Tokyo, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An automatic focus detecting camera in which the full-aperture f-number of a lens mounted on the camera is automatically detected and applied to a focus detecting circuit. The lens is provided with indicating pins in a pattern indicative of a full-aperture f-number of the lens. Switch contact pins are provided on the lens mount of the camera positioned corresponding to the positions of the indicating pins, with the switch contact pins being operated in accordance with the presence or absence of the corresponding indicating pins. The states of the switch contact pins are decoded to provide data indicative of the full-aperture f-number of the lens. If the lens does not have any indicating pins, the decoding circuitry outputs a fixe value, which can be shifted by a manual switch on the body of the camera. Also, a manual switch may be provided on the body of the camera for instructing the full-aperture f-number in the case that the lens does not have any indicating pins.