Lamp positioning mechanism

Claim 1

IN COMBINATION WITH A LUMINAIRE COMPRISING A HOUSING, A CONCAVE REFLECTOR SUPPORTED WITHIN SAID HOUSING, SAID REFLECTOR HAVING A PERIPHERY AND AN APERTURE PROVIDED IN SAID REFLECTOR, A LAMPHOLDER EXTENDING INTO SAID REFLECTOR THROUGH SAID APERTURE AND ADAPTED TO SUPPORT A LIGHT SOURCE WITHIN SAID REFLECTOR, FLEXIBLE GASKET MEANS ADJACENT SAID REFLECTOR AND SAID LAMPHOLDER FOR ESTABLISHING A SEAL THEREBETWEEN, A REFRACTOR SEALABLY ENGAGING SAID REFLECTOR AROUND THE PERIPHERY THEREOF, AND A LAMPHOLDER ADJUSTING MEANS FOR ADJUSTING THE TILT OF SAID LAMPHOLDER AND LIGHT SOURCE TO ANY ONE OF SEVERAL PREDETERMINED POSITIONS WITHIN SAID REFLECTOR WITHOUT DISTURBING THE SEALING ACTION OF SAID FLEXIBLE GASKET MEANS, SAID LAMPHOLDER ADJUSTING MEANS COMPRISING: A LAMPHOLDER SUPPORT AFFIXED TO SAID LAMPHOLDER AND RELEASABLY MOUNTED TO SAID HOUSING, SAID LAMPHOLDER SUPPORT HAVING A SERIES OF PLANE-DETERMINING MEANS THEREON WHICH ESTABLISH A PREDETERMINED SERIES OF SLIGHTLY ANGULARLY DISPLACED INTERSECTING PLANES; REFERENCE PLANE-DETERMINING MEANS AFFIXED TO SAID HOUSING AND DISPOSED IN PREDETERMINED RELATION WITH RESPECT TO SAID SERIES OF PLANE-DETERMINING MEANS; MEANS FOR RELEASABLY SECURING SAID LAMPHOLDER SUPPORT TO SAID REFERENCE PLANE-DETERMINING MEANS ALONG ANY ONE OF SAID SERIES OF PLANE-DETERMINING MEANS WHICH IS ADJACENT AND SUBSTANTIALLY COPLANAR WITH RESPECT TO SAID REFERENCE PLANE-DETERMINING MEANS; SAID LAMPHOLDER PRIVOTING SLIGHTLY ABOUT AN AXIS WHEN IT IS ADJUSTED FROM ONE PREDETERMINED TILT TO ANOTHER PREDETERMINED TILT; AND EACH OF SAID SERIES OF PLANE-DETERMINING MEANS AND SAID REFERENCE PLANE-DETERMINING MEANS TOGETHER WITH THE SECURING MEANS BEING POSITIONED WITH RESPECT TO ONE ANOTHER TO CAUSE THE AXIS OF PIVOT OF SAID LAMPHOLDER DURING TILTING OF SAME TO BE PROXIMATE THE GEOMETRIC CENTER OF SAID FLEXIBLE GASKET; WHEREBY ADJUSTMENT OF SAID LAMPHOLDER FROM ONE PREDETERMINED TILT TO ANOTHER PREDETERMINED TILT DOES NOT DISTURB THE SEAL BETWEEN SAID REFLECTOR AND SAID LAMPHOLDER.