Teaching machine with programmed multiple track film

Claim 1

IN A TEACHING DEVICE DERIVING FROM A FILM STRIP DIFFERING SEQUENCES OF IMAGES RESPONSIVE TO SELECTION OF DESIRED SUBJECT MATTER BY INDIVIDUAL STUDENTS, APPARATUS ADAPTED TO PRESENT A LONGITUDINAL FILM STRIP DIVIDED INTO A PLURALITY OF SIDE-BY-SIDE CHANNELS, EACH CHANNEL DISPOSED ALONG THE LENGTH OF THE FILM STRIP WITH A PLURALITY OF SEQUENTIAL FRAMES OCCUPYING ADJACENT FRAME POSITIONS SEQUENTIALLY PRESENT ALONG ITS LENGTH, THE FILM STRIP BEING SUBDIVIDED ALONG ITS LENGTH INTO A PLURALITY OF SEGMENTS WITH A PLURALITY OF FRAMES THEREIN, IN WHICH EACH CHANNEL PRESENTS IN THE PLURALITY OF FRAMES WITHIN THE SEGMENT AN INSTRUCTIVE PROGRAM DIFFERING IN CONTENT FROM THE PLURALITY OF FRAMES WITHIN THE SEGMENTS OF THE OTHER CORRESPONDING CHANNELS, COMPRISING IN COMBINATION, SELECTIVE CONTROL MEANS FOR ADVANCING SAID FILM STRIP FRAME BY FRAME IN A SINGLE DIRECTION FOR VIEWING ALL SEQUENTIAL FRAME POSITIONS IN SEQUENCE ALONG THE LENGTH OF THE FILM, CHANNEL SELECTING MEANS COMPRISING A MOVABLE SHUTTLE WITH A SINGLE CHANNEL VIEWING APERTURE OPERABLE TO MOVE BETWEEN SAID CHANNELS TO UNIQUELY SELECT AT EACH FRAME POSITION A SINGLE ONE OF SAID CHANNELS, MANUAL POSITION SELECTION MEANS FOR OPERATING THE MOVABLE SHUTTLE AT THE END OF EACH OF SAID SEGMENTS TO THAT UNIQUE ONE OF THE CHANNELS IN WHICH THE FRAMES WITHIN THE NEXT ONE OF THE FILM SEGMENTS ARE TO BE SEQUENTIALLY PRESENTED, WHEREBY A COMPLETE VARIABLE INSTRUCTION PROGRAM IS PRESENTED IN SEQUENTIAL FRAME BY FRAME ORDER FROM A VIEWING PATH WHICH CAN MOVE FROM CHANNEL TO CHANNEL UNDER OPERATOR CONTROL AT THE END OF EACH SAID FILM SEGMENT.