Photographic range and viewfinder

Claim 1

IN A PHOTOGRAPHIC CAMERA HAVING A CAMERA BODY, AN OBJECTIVE LENS AND MOVABLE MEANS FOR EFFECTING FOCUSING MOVEMENT OF SAID LENS RELATIVE TO THE FILM PLANE OF SAID CAMERA, THE COMBINATION COMPRISING: (A) A RANGEFINDER HAVING MEANS FOR RECEIVING AND DEFLECTING A MEASURING BEAM FROM THE SCENE TO BE PHOTOGRAPHED; (B) A HOUSING WHEREIN THE ELEMENTS OF SAID RANGEFINDER ARE ENCLOSED; (C) MOUNTING MEANS FOR MOVABLY AFFIXING SAID HOUSING TO SAID CAMERA BODY FOR SELECTIVE MOVEMENT BETWEEN AN OPERATIVE POSITION, WHEREIN SAID SCENE MAY BE VIEW THROUGH SAID RANGEFINDER, AND AN INOPERATIVE POSITION, WHEREIN SAID HOUSING IS AT LEAST PARTIALLY ENCLOSED WITHIN SAID CAMERA BODY; AND (D) LINKAGE MEANS EFFECTIVE UPON MOVEMENT OF SAID HOUSING TO SAID OPERATIVE POSITION TO TRANSMIT MOVEMENT OF SAID MOVABLE MEANS TO SAID RECEIVING AND DEFLECTING MEANS, WHEREBY SAID MEASURING BEAM PROVIDES A VISUAL INDICATION OF THE PLANE OF THE SCENE WHICH IS FOCUSED AT THE FILM PLANE OF SAID CAMERA BY SAID OBJECTIVE LENS THROUGHOUT THE FOCUSING RANGE THEREOF.