Slide projector with interchangeable lamp housing components

Claim 1

IN A SLIDE PROJECTOR HAVING AN OBJECTIVE AND SLIDE SHIFTING MEANS, AND ARRANGED TO BE USED WITH PROJECTOR LAMPS AT DIFFERENT RATINGS, A CASING HAVING MEANS DEFINING A SLIDE STORAGE COMPARTMENT AND PARTLY DEFINING A LAMP COMPARTMENT SEPARATED FROM SAID SLIDE STORAGE COMPARTMENT BY A PARTITION, AND INCLUDING A BASE, SIDE, END AND TOP WALLS FORMING A COVER; SAID TOP WALL AND ONE SIDE WALL BEING CUT AWAY, IN THE AREA OF SAID LAMP COMPARTMENT, TO FORM A CONTINUOUS OPENING EXTENDING LATERALLY IN SAID TOP WALL AND SUBSTANTIALLY VERTICALLY IN SAID ONE SIDE WALL; A PROJECTOR LAMP SOCKET ADJUSTABLY POSITIONED IN SAID LAMP COMPARTMENT; A COVER COMPONENT HAVING A TOP WALL SECTION AND A SIDE WALL SECTION CONFORMING TO THE CUT AWAY PORTION OF SAID TOP WALL AND SAID ONE SIDE WALL, RESPECTIVELY, AND ARRANGED TO SEAT IN SAID OPENING TO COMPLETE THE COVER ENCLOSURE, SAID COVER COMPONENT BEING DESIGNED FOR USE WITH A PROJECTOR LAMP OF A RESPECTIVE RATING; COOPERATING MEANS ON SAID CASING AND ON SAID COVER COMPONENT OPERABLE TO DISENGAGEABLY RELEASABLY LATCH SAID COVER COMPONENT IN COVER-COMPLETING POSITION ON SAID CASING; A VENTILATING GRID OPENING THROUGH ONE SECTION OF SAID COVER COMPONENT; AND INWARDLY PROJECTING ABUTMENT MEANS ON SAID COVER COMPONENT ENGAGED WITH SAID LAMP SOCKET, UPON POSITIONING OF SAID COVER COMPONENT IN COVER ENCLOSURE COMPLETING POSITION, TO ADJUST THE LATTER FOR PROPER ALIGNMENT OF THE RESPECTIVE LAMP ASSOCIATED THEREWITH WITH SAID OBJECTIVE; THE EFFECTIVE LENGTH OF SAID ABUTMENT MEANS BEING COORDINATED WITH THE CONSTANTS OF THE ASSOCIATED LAMP.