Cartridge for motion picture projector

Claim 1

IN A FILM CARTRIDGE FOR USE IN A MOTION PICTURE PROJECTOR HAVING A CARTRIDGE-RECEIVING SOCKET AND AN ILLUMINATING MEANS EXTENDING INTO THE SOCKET, THE COMBINATION OF: A HOUSING, A SPOOL ROTATABLY MOUNTED IN SAID HOUSING FOR SUPPORTING AN ENDLESS ROLL OF FILM, SAID SPOOL HAVING A PERIPHERAL RIDGE ALONG ONE EDGE FOR SUPPORTING THE PERFORATED BORDER OF SAID FILM, SAID HOUSING HAVING A CHAMBER PROTRUDING ON THE SIDE OF SAID HOUSING REMOTE FROM THE PERIPHERAL RIDGE OF SAID SPOOL FOR RECEIVING THE FILM LOOP CONNECTING THE INNER AND OUTER CONVOLUTIONS OF THE ROLL, SAID CHAMBER HAVING AN APERTURE IN WHICH A FRAME OF FILM IS POSITIONED FOR PROJECTING, AND SAID HOUSING HAVING AN EXTERNAL CAVITY ADJACENT SAID CHAMBER FOR ACCOMMODATING SAID ILLUMINATING MEANS.