Bowling pin base

Claim 1

IN COMBINATIN A BOWLING PIN HAVING ITS BUTT END PROVIDED WITH AN UNDERCUT AT THE JUNCTURE OF THE BOTTOM SURFACE AND THE SIDE SURFACE OF THE PIN FORMING THEREBY AN OUTWARDLY PROJECTING CENTRAL CORE, SAID UNDERCUT EXTENDING INTO THE BODY OF THE PIN ADJACENT SAID CORE AND FORMING A DOWNWARDLY FACING ANNULAR GROOVE LEADING TO A CIRCUMFERENTIAL OUTWARD FACING LOCKING GROOVE NEAR THE BASE OF SAID CORE AND SPACED FROM THE FLOOR OF SAID ANNULAR GROOVE, AND ANNULAR BASE MEMBER COMPRISING AN ANNULAR FRUSTO-CONCIAL SKIRT PORTION FORMING THE JUNCTION FOR THE BOTTOM AND SIDE OF THE PIN AND, INTEGRAL WITH SAID SKIRT PORTION, AN UPRIGHT COLLAR PORTION ENCIRCLING AND ENENGAGING SAID CORE AND TERMINATING AT ITS LOWER END IN A SHOULDER, SAID BASE MEMBER CONTAINING AN ANNULAR CENTRAL RECESS IN THE BOTTOM THEREOF TERMINATING AT SAID SHOULDER, AND AN INNER CYLINDRICAL LOCKING RING FOR SAID BASE MEMBER IN ABUTMENT WITH, AND TERMINATING AT, THE SHOULDER OF SAID BASE MEMBER, SAID LOCKING RING COMPRISING AN ANNULAR BEAD ENGAGED IN SAID LOCKING GROOVE IN THE CORE.