Combined range- and view-finders

Claim 1

IN A PHOTOGRAPHIC CAMERA HAVING AN OBJECTIVE LENS AND MEANS FOR EFFECTING MOVEMENT THEREOF TO FOCUS A SCENE TO BE PHOTOGRAPHED AT THE FOCAL PLANE OF SAID CAMERA, THE COMBINATION THEREWITH OF: VIEWING MEANS ARRANGED TO RECEIVE A FIRST BEAM FROM SAID SCENE, FRAMING MEANS VISIBLE IN SAID VIEWING MEANS AND DEFINING THE BOUNDARIES OF AN AREA AT SAID SCENE, FIXED MEANS DEFINING A FIRST PORTION OF SAID BOUNDARIES AND MOVABLE MEANS DEFINING A SECOND PORTION OF SAID BOUNDARIES, FIRST MEANS FOR SO MOVING SAID MOVABLE MEANS IN RESPONSE TO FOCUSING MOVEMENT OF SAID OBJECTIVE LENS THAT SAID AREA CORRESPONDS TO THE PORTION OF SAID SCENE WHICH IS FOCUSED BY SAID OBJECTIVE LENS AT THE FOCAL PLANE OF THE CAMERA, SAID MOVABLE MEANS BEING SO ARRANGED WITH RESPECT TO SAID FIXED MEANS THAT THE POSITION OF THE CENTER OF SAID AREA SHIFTS AS SAID MOVABLE MEANS IS MOVED, REFLECTING MEANS ARRANGED TO RECEIVE A MEASURING BEAM FROM SAID SCENE AND DEFLECT THE SAME INTO THE FIELD OF VIEW OF SAID VIEWING MEANS, SECOND MEANS FOR SO MOVING SAID REFLECTING MEANS IN RESPONSE TO SAID FOCUSING MOVEMENT OF SAID OBJECTIVE LENS AS TO CAUSE SAID MEASURING BEAM TO BE IN COINCIDENCE WITH THE CORRESPONDING PORTION OF SAID FIRST BEAM WHEN SAID SCENE IS PROPERLY FOCUSED AT SAID FOCAL PLANE, AND THIRD MEANS FIXEDLY DEFINING THE PERIPHERY OF SAID MEASURING BEAM AND MOVABLE IN RESPONSE TO SAID FOCUSING MOVEMENT TO CAUSE SAID MEASURING BEAM AS IT APPEARS WITHIN SAID FRAMING MEANS TO BE CENTERED THEREIN THROUGHOUT THE FOCUSING RANGE OF SAID OBJECTIVE LENS.