Color filter slide holder and changer

Claim 1

A COLOR SLIDE CHANGER COMPRISING A SINGLE PIECE EXTRUDED CASING HAVING A U SHAPED TO FORM A BOTTOM AND TWO SIDES, SAID CASING HAVING A PLURALITY OF INWARDLY FACING LONGITUDINALLY EXTENDING RECESSES AND A PLURALITY OF PARALLEL INNER FINS POSITIONED BETWEEN SAID RECESSES TO FORM A PLURALITY OF SPACED GROOVES EXTENDING LONGITUDINALLY AND PARALLEL TO SAID RECESSES AND IN COMMUNICATION THEREWITH, TWO PAIRS OF PERIPHERAL FINS EXTENDING PARALLEL TO SAID INNER FINS WITH ONE FIN OF EACH PAIR HAVING AN ANGULATED MEMBER TO FORM L-SHAPED SLOTS BETWEEN THE FINS OF A RESPECTIVE PAIR, FRONT AND REAR PANELS HAVING FLANGES FITTING IN SAID L-SHAPED SLOTS TO INTERLOCK SAID PANELS AND CASING, A COVER EXTENDING ACROSS THE OPEN END AND HAVING FLANGES OVERLAPPING WITH THE SIDES OF SAID CASING AND HAVING FASTENING MEANS FOR SECURING THE COVER TO SAID CASING, SAID PANELS AND CSING FORMING A SPACE FOR PASSING A LIGHT BEAM AND A STORAGE SPACE FOR COLORED FILTER SLIDE FRAMES NOT POSITIONED IN THE LIGHT PASSING SPACE, OPENINGS IN SAID PANELS ON EACH SIDE OF SAID LIGHT PASSING SPACE, COLOR SLIDE FRAMES SLIDABLY MOUNTED IN SAID GROOVES FOR MOVEMENT BETWEEN SAID STORAGE SPACE AND SAID LIGHT PASSING SPACE, SAID FRAMES EACH HAVING A NOTCH, SAID CASING HAVING A REDUCED PORTION AT ONE END OF ONE OF SAID SIDES TO FORM SAID RECESSES INTO SLOTS EXTENDING THERETHROUGH COMMUNICATING WITH SAID GROOVES, A LATCH MEANS HAVING A CATCH EXTENDING INTO A RESPECTIVE SLOT AND GROOVE, AND A ROTATABLE SHAFT SECURING SAID LATCHES TOGETHER IN FIXED RELATION FOR HOLDING A FRAME IN THE LIGHT PASSING SPACE BY A RESPECTIVE CATCH FITTING IN A RESPECTIVE NOTCH OF A RETAINED FRAME AND RELEASING A RETAINED FRAME ON MOVEMENT OF ANOTHER FRAME INTO THE LIGHT PASSING SPACE.