Patent ID: 7150670

Claim:
A mechanical toy comprising; two enclosed chambers, one designated as a lower chamber and the other as an upper chamber wherein each of the two enclosed chambers is asymmetrically constructed to ensure that when a weight imbalance occurs, the weight imbalance always occurs on a predetermined side of a vertical plane running through said chambers regardless of which chamber is positioned above to provide rotation in a single direction; a hollow member extending into each said chamber connecting said chambers to each other; a vaporizing medium contained within said enclosed chambers and said hollow connecting member; a rotational shaft attached about its center to said hollow member and chambers that runs lengthwise through said vertical plane and defines an axis of rotation between said chambers; support arms connected to said rotational shalt on either side of said hollow member and chambers at bearing points to provide 360-degree rotation; a base secured to said support arms; a heat source about said base to excite said vaporizing medium within said lower chamber to create an increase in vapor pressure within said lower chamber relative to said upper chamber that exerts force upon said vaporizing medium within said lower chamber to communicate said vaporizing medium through said hollow member into said upper chamber thereby creating the weight imbalance within said upper chamber on the predetermined side of the vertical plane that allows gravity to act upon said upper chamber when a substantial amount of said vaporizing medium has collected within said upper chamber pulling said upper chamber downward around said axis of rotation causing rotation in the single direction thereby switching the positions of the upper and lower chambers; said heat source excites the vaporizing medium within the lower chamber as after said rotation to provide reveal rotation in the single direction; said repeat rotation in the single direction produces 360-degree rotation.