Motion picture projector

Claim 1

A FILM VIEWING DEVICE FOR A FILM BEARING INDICIA OF EACH FRAME THEREON, COMPRISING A HOUSING, A FILM ILLUMINATION MEANS INCLUDING A STROBOSCOPIC LIGHT SOURCE PROVIDED WITHIN THE HOUSING, MEANS FOR DETECTING THE FILM FRAME INDICIA AND TRIGGERING THE STROBOSCOPIC LIGHT SOURCE TO PROJECT EACH FRAME IMAGE IN SEQUENCE, A CARTRIDGE HAVING AT LEAST ONE APERTURE IN OPTICAL ALIGNMENT WITH THE FILM ILLUMINATION MEANS, SAID CARTRIDGE BEING INSERTABLE WITHIN THE HOUSING FOR COMMUNICATION WITH SAID FILM ILLUMINATION MEANS, A FILM DRIVE OPERATIVELY ASSOCIATED WITH THE VIEWING DEVICE, A FILM REEL ROTATABLY MOUNTED WITHIN SAID CARTRIDGE HAVING A CONTINUOUS FILM STRIP, A CAPSTAN ROTATABLY MOUNTED OUTSIDE THE CARTRIDGE AND ADJACENT TO SAID APERTURE FOR DRIVING COOPERATION WITH SAID CONTINUOUS FILM STRIP AND SAID FILM DRIVE BY DRAWING THE FILM STRIP PORTION TO BE VIEWED FROM THE INNERMOST LAYER OF FILM IN SAID REEL AND FEEDING THE VIEWED FILM PORTION BACK ON THE OUTERMOST LAYER OF FILM IN SAID REEL, SAID REEL BEING LOOSELY WOUND TO ACCOMMODATE VARIATIONS IN FILM VELOCITY BETWEEN SAID INNERMOST LAYER AND SAID OUTERMOST LAYER OF FILM, SPLINE MEANS COOPERATIVELY ENGAGING THE CAPSTAN WITH THE FILM DRIVE TO RUN THE FILM STRIP CONTINUOUSLY AT A SUBSTANTIALLY CONSTANT SPEED IN ONE DIRECTION, A FILM GATE WITHIN THE CARTRIDGE ADJACENT TO SAID CARTRIDGE APERTURE ADAPTED TO OPTICALLY ALIGN THE FILM WITH SAID CARTRIDGE APERTURE AND SAID FILM ILLUMINATION MEANS, SCREEN MEANS WITHIN SAID HOUSING IN OPTICAL ALIGNMENT WITH THE FILM ILLUMINATION MEANS AND SAID CARTRIDGE APERTURE FOR RECEIVING THE FILM IMAGE THEREON, AND FOCUSING MEANS INTERPOSED IN OPTICAL ALIGNMENT BETWEEN THE SCREEN MEANS AND SAID CARTRIDGE APERTURE FOR PROJECTING THE FILM IMAGE THEREBETWEEN.