Automatic cameras

Claim 1

IN A CAMERA, IN COMBINATION, AN OBJECTIVE; A PAIR OF SETTING RINGS TURNABLY CARRIED BY SAID OBJECTIVE FOR RESPECTIVELY SETTING THE EXPOSURE TIME AND THE EXPOSURE APERTURE, SAID SETTING RINGS RESPECTIVELY HAVING REST POSITIONS WHERE SAID EXPOSURE TIME AND EXPOSURE APERTURE ARE AT AN EXTREME VALUE; DIFFERENTIAL MEANS COOPERATING WITH SAID SETTING RINGS FOR TURNING THE LATTER TO SET THE EXPOSURE TIME AND THE EXPOSURE APERTURE OF THE CAMERA; MANUALLY OPERABLE MEANS COOPERATING WITH SAID DIFFERENTIAL MEANS FOR ACTUATING THE LATTER, SAID MANUALLY OPERABLE MEANS INCLUDING A PROJECTION MOVABLE ALONG A PREDETERMINED PATH; LIGHT-SENSITIVE MEANS COOPERATING WITH SAID MANUALLY OPERABLE MEANS FOR CONTROLLING THE EXTENT TO WHICH SAID DIFFERENTIAL MEANS IS ACTUATED BY SAID MANUALLY OPERABLE MEANS; A SHUTTER OPERATING MEMBER MOVABLE ALONG A SECOND PATH; A BLOCKING MEMBER LOCATED ALONG SAID SECOND PATH FOR PREVENTING OPERATION OF SAID SHUTTER OPERATING MEMBER WHEN SAID BLOCKING MEMBER IS IN A BLOCKING POSITION; AND LINKAGE MEANS CONNECTED TO SAID BLOCKING MEMBER AND HAVING A PORTION LOCATED IN THE PATH OF MOVEMENT OF SAID PROJECTION OF SAID MANUALLY OPERABLE MEANS TO BE ACTUATED BY SAID PROJECTION OF SAID MANUALLY OPERABLE MEANS WHEN THE LATTER IS OPERATED TO ACTUATE SAID DIFFERENTIAL MEANS FOR ACTING THROUGH SAID LINKAGE ON SAID BLOCKING MEANS TO REMOVE THE LATTER FROM SAID BLOCKING POSITION THEREOF SO AS TO FREE SAID SHUTTER OPERATING MEMBER FOR OPERATION TO ACTUATE THE SHUTTER ONLY AFTER THE DIFFERENTIAL MEANS HAS BEEN ACTUATED TO SET SAID RINGS.