Automatic iris control by camera film magazine

Claim 1

A CAMARA INCLUDING A HOUSING HAVING A SPACE THERE IN, LIGHT-RESPONSIVE MEANS IN THE HOUSING FOR DETERMINING PROPER EXPOSURE OF A FILM IN THE CAMERA, THE LIGHTRESPONSIVE MEANS INCLUDING DIFFERENT ELECTRIC CIRCUITS FOR CHANGING THE OPERATION OF SAID LIGHT-RESPONSIVE MEANS AND INCLUDING ALSO A PLURALITY OF SWITCHES IN THE CIRCUITS AND AT SPACEDS LOCATIONS AT ONE SIDE OF SAID SPACE IN THE HOUSING, A GROUP OF FILM MAGAZINES THAT FIT INTO THE HOUSING AND INTO THE BACK OF SAID SPACE WITHIN THE HOUSING AND THAT ARE SELECTIVELY INSERTED IN THE HOUSING TO CHANGE THE FILM IN THE CAMERA, EACH FILM MAGAZINE HAVING FILM SPOOL HOUSINGS AT OPPOSITE SIDES THEREOF AND A REARWARDLY RECESSED FRONT WALL BETWEEN THE HOUSINGS AND WITH AN EXPOSURE SLOT THEREIN FOR EXPOSING A FILM THAT IS DRAWN ACROSS THE BACK OF SAID RECESSED FRONT WALL, AND AN ABUTMENT SURFACE ON THE FILM SPOOL HOUSING ON ONE SIDE OF EACH OF THE MAGAZINES, LOCATION OF THE ABUTMENT SURFACES OF THE DIFFERENT MAGAZINES CORRESPONDING WITH THE LOCATION OF DIFFERENT ONES OF THE SPACED SWITCHES, WHICH SWITCHES CLOSE THE CIRCUITS THAT ADJUST THE CAMERA FOR THE PARTICULAR FILM SPEEDS OF THE FILMS IN THE DIFFERENT MAGAZINES.