Film feeding mechanism

Claim 1

A MOTION PICTURE PROJECTOR COMPRISING IN COMBINATION: (A) A GATE HAVING A PROJECTION APERTURE AND THROUGH WHICH GATE A MOTION PICTURE FILM IS ADAPTED TO BE INTERMITTENTLY ADVANCED PAST THE APERTURE THEREIN FOR THE PROJECTION OF SUCCESSIVE IMAGE FRAMES THEREON, (B) A FILM CLAW, (C) MEANS FOR MOUNTING SAID CLAW FOR UP AND DOWN AND IN AND OUT MOVEMENT RELATIVE TO SAID GATE TO INTERMITTENTLY ADVANCE THE FILM THROUGH SAID GATE, (D) DRIVE MEANS, (E) A SHUTTER CONNECTED TO SAID DRIVE MEANS TO INTERMITTENTLY INTERSECT THE OPTICAL AXIS OF SAID PROJECTION APERTURE AND INTERRUPT THE PASSAGE OF LIGHT THERETHROUGH AT A GIVEN FREQUENCY, (F) AN UP AND DOWN CAM CONNECTED TO SAID DRIVE MEANS AND TO SAID CLAW TO DRIVE SAID CLAW UP AND DOWN RELATIVE TO SAID GATE AT SAID GIVEN FREQUENCY, (G) MEANS FOR IMPARTING IN AND OUT MOVEMENTS TO SAID CLAW TO INTERMITTENTLY ENGAGE SAIID FILM IN DIFFERENT TIME RELATIONS WITH SAID UP AND DOWN MOVEMENT THEREOF AND INCLUDING (1) A PLURALITY OF IN AND OUT CAMS CONCENTRICALLY ARRANGED AT DIFFERENT RADIAL DISTANCES FROM AND ROTATABLE ABOUT A COMMON AXIS OF ROTATION SUBSTANTIALLY PARALLEL TO THE OPTICAL AXIS OF SAID GATE, SAID IN AND OUT CAMS BEING SELECTIVELY OPERABLY CONNECTABLE WITH SAID CLAW FOR INDIVIDUALLY CONTROLLING THE IN AND OUT MOVEMENTS OF SAID CLAW RELATIVE TO SAID GATE WHEN ROTATED ABOUT SAID COMMON AXIS. (2) MEANS COUPLED TO SAID DRIVE MEANS FOR SIMULTANEOUSLY ROTATING SAID IN AND OUT CAMS ABOUT SAID COMMON AXIS AND CAUSING EACH OF SAID IN AND OUT CAMS TO PRODUCE A DIFFERENT FREQUENCY OF IN AND OUT MOVEMENT OF SAID CLAW WHEN SAID CLAW IS OPERATIVELY ASSOCIATED THEREWITH, AND (3) MEANS FOR SELECTIVELY CONNECTING DIFFERENT ONES OF SAID IN AND OUT CAMS IN OPERATIVE RELATION WITH SAID FILM CLAW TO VARY THE FREQUENCY AT WHICH SAID CLAW ADVANCES SAID FILM THROUGH SAID GATE, AND INCLUDING; (A) A CAM FOLLOWER OPERATIVELY INTERPOSED BETWEEN SAID CLAW AND SAID IN AND OUT CAMS AND BIASED TOWARD THE LATTER, SAID FOLLOWER BEING MOUNTED FOR MOVEMENT GENERALLY RADIALLY OF SAID COMMON AXIS INTO INDIVIDUAL OPERATIVE RELATIONSHIP WITH ANY SELECTED ONE OF SAID CAMS, AND (B) MEANS FOR MOVING SAID CAM FOLLOWER WHILE MAINTAINING ITS OPERATIVE RELATIONSHIP WITH SAID CLAW.