Pivoted combination game board and exercising device

Claim 1

AN AMUSEMENT AND EXERCISING DEVICE COMPRISING AN ELONGATED MEMBER HAVING A TOP PORTION INCLUDING A PAIR OF GENERALLY FLAT UPPER SURFACES AT OPPOSITE ENDS THEREOF WHICH ARE DIMENSIONED AND SPACED TO RECEIVE THE FEET OF A PERSON IN SPACED APART POSITIONS ON THE TOP OF SAID MEMBER, SAID MEMBER HAVING A BOTTOM PORTION DEFINING A CONVEXLY CURVED LOWER SURFACE FOR SUPPORT OF THE MEMBER IN A MANNER PROVIDING FOR TILTING MOVEMENT OF THE MEMBER IN ALL DIRECTIONS ABOUT ITS CENTER, THE CURVATURE OF SAID LOWER SURFACE BEING GRADUAL AND EXTENDING SUBSTANTIALLY THE ENTIRE LENGTH AND WIDTH OF THE MEMBER, SAID TOP PORTION INCLUDING A CENTRAL SURFACE SECTION INTERMEDIATE SAID PAIR OF FLAT UPPER SURFACES WHICH IS DEFINED BY A GENERALLY CIRCULAR RIM, A PLURALITY OF RECESSES FORMED IN SAID CENTRAL SURFACE SECTION, AND A BALL DISPOSED WITHIN THE RIM AND ADAPTED TO BE POSITIONED IN ANY OF SAID RECESSES, SAID DEVICE BEING OF MATERIAL OF SUFFICIENT STRENGTH TO SUPPORT A PERSON THEREON, WHEREBY A PERSON SUPPORTED ON SAID MEMBER WITH HIS FEET ASTRIDE SAID CENTRAL SECTION CAN CAUSE A ROCKING MOVEMENT OF SAID BOARD BY SHIFTING HIS WEIGHT AND THEREBY CAUSE SAID BALL TO ROLL WITHIN SAID CIRCULAR RIM AND BE DEPOSITED IN ONE OF SAID RECESSES.