ROULETTE WHEELS
A roulette wheel (1) has a central, rotatably-mounted disc (15) with conical surface (12) that is coupled via friction wheels (20) to rotate about a common axis with, but in the opposite sense to, the peripheral ring (13) having numbered ball-capture pockets (14), of a rotatably-mounted disc (16) . The surface (12) is textured with regular indentations and this together with the contra-rotation- of the disc (15) retards a ball which having been launched from a ring (7) of the bowl-housing (2) of the wheel (1), passes onto the surface (12) through the pocketed ring (13) before falling back into one of the pockets (14) . The ring (7) is releasable from the housing (2) for replacement, and a crown (23) at the top of a central spindle (11) of the wheel (1) is recessed to receive a ball (24) for testing against a magnet (25) in confirming absence of ferromagnetic material. A spirit-filled vial may be used in the crown (23) for levelling the wheel (1) .