Navigation light for boats

Claim 1

A NAVIGATION LIGHT FOR BOATS COMPRISING, IN COMBINATION, A POST OF GENERALLY CIRCULAR CROSS-SECTION; ILLUMINATING MEANS CARRIED BY SAID POST; A MOUNTING BRACKET ADAPTED TO BE MOUNTED ON A BOAT AND HAVING AN OPENING OF TAPERED CROSS-SECTION DEFINED BY TAPERED SIDE WALLS EXTENDING THERETHROUGH, SAID MOUNTING BRACKET HAVING AN UPSTANDING NECK THROUGH WHICH THE OPENING IN SAID BRACKET EXTENDS; A BUSHING MOUNTED IN THE OPENING IN SAID BRACKET AND SLIDABLE THEREIN TO A LIMITED EXTENT IN ONE DIRECTION PARALLEL TO THE LONGITUDINAL AXIS OF THE OPENING IN SAID BRACKET, SAID BUSHING HAVING AN OUTER SURFACE, A PART OF SAID OUTER SURFACE BEING TAPERED TO CONFORM GENERALLY TO SAID TAPERED SIDE WALLS AND ENGAGING SAID TAPERED SIDE WALLS, SAID BUSHING HAVING A THREADED NECK, SAID THREADED NECK PROJECTING BEYOND SAID NECK OF SAID BRACKET, SAID BUSHING ALSO HAVING AN OPENING OF GENERALLY CIRCULAR CROSS-SECTION EXTENDING THERETHROUGH AND THROUGH SAID THREADED NECK THEREOF IN THE SAME GENERAL DIRECTION AS THE OPENING IN SAID BRACKET, SAID POST BEING MOUNTED IN THE OPENING IN SAID BUSHING, SAID BUSHING HAVING A SLOT THEREIN EXTENDING FROM SAID OUTER SURFACE INTO THE OPENING IN SAID BUSHING AND EXTENDING FROM ONE END OF SAID BUSHING TO THE OTHER END THEREOF; AND A CAP MEMBER HAVING AN OPENING THERETHROUGH WHICH SAID POST EXTENDS, SAID CAP MEMBER BEING THREADABLY ENGAGEABLE WITH SAID THREADED NECK OF SAID HOUSING AND ADAPTED TO DRAW SAID PART OF SAID OUTER SURFACE OF SID BUSHING INTO TIGHT ENGAGEMENT WITH SAID TAPRED SIDE WALLS DEFINING THE OPENING IN SAID BRACKET BY MOVING SAID BUSHING IN SAID ONE DIRECTION, WHEREBY THE WIDTH OF AT LEAST A PART OF SAID SLOT IS DECREASED AND SAID BUSHING IS DRAWN INTO TIGHT GRIPPING ENGAGEMENT WITH SAID POST, SAID CAP MEMBER HAVING A SKIRT PORTION EXTENDING OVER SAID NECK OF SAID BRACKET AND SPACED APART FROM SAID NECK OF SAID BRACKET.