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:
Jun. 03, 1980
Filed:
Feb. 27, 1979
Toshinori Imura, Sakai, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
An auto-focus camera includes a first signal circuit for generating a first control signal only when the battery voltage exceeds a minimum permissible level for normal operation of an electric range finder and an exposure control circuit, and a second signal circuit for generating a second control signal only when the range finder has reached a stable operating state after commencement of electric power supply thereto. The existence of both the first and second control signals enables an electromagnet provided in an exposure control circuit for arresting the camera shutter in an open state to hold an engaging member out of the locus of movement of a corresponding engaging member provided on a trigger member. The trigger member can be manipulated to a terminal position for allowing operation of a focus adjusting device unless the engaging members engage one another, and the range finder is supplied with electric power from the battery during the course of the manipulation of the trigger member. The camera shutter is opened in response to the termination of the automatic focus adjustment.