Disconnect lighting fixture

Claim 1

A DISCONNECT LIGHTING FIXTURE COMPRISING A BASE HAVING A RECEPTACLE MOUNTED THEREIN, SAID RECEPTACLE INCLUDING A CONTACT PLATE HAVING A CENTER CONTACT AND A CONCENTRICALLY SPACED RING CONTACT NORMALLY POSITIONED IN THE PLANE OF THE TOP SURFACE OF THE MOUNTING BASE, YIELDABLE MEANS URGING SAID CONTACT PLATE UPWARDLT INTO SAID POSITION FLUSH WITH THE SURFACE OF THE MOUNTING BASE, A CONTACT SUPPORTING UNIT MOUNTED IN AXIALLY ALIGNED RELATION WITH SAID CONTACT PLATE AND SPACED THEREFROM AND HAVING A PAIR OF CONTACTS ADAPTED TO ENGAGE AND MAKE ELECTRICAL CONNECTION WITH SAID CENTER CONTACT AND RING CONTACT OF SAID CONTACT PLATE WHEN SAID PLATE IS MOVED AXIALLY INWARD INTO ENGAGEMENT WITH SAID CONTACTS, SAID BASE BEING ADAPTED TO RECEIVE A PLUG-IN LAMP UNIT INCLUDING A COUPLING ASSEMBLY HAVING A PAIR OF CONTACTS POSITIONED COMPLEMENTARY TO THE POSITIONING OF THE CONTACTS POSITIONED COMPLEMENTARY TO COUPLING AND BASE HAVING MEANS TO REMOVABLY ATTACH SAID COUPLING AND LAMP UNIT TO SAID BASE, SAID COUPLING BEING OPERABLE UPON INSERTION IN SAID BASE TO FIRST MAKE CONTACT WITH THE CONTACTS OF SAID CONTACT PLATE AND TO URGE SAID CONTACT PLATE INTO ELECTRICAL ENGAGEMENT WITH THE CONTACTS CARRIED BY SAID BASE.