US Patent 7275974 Magnetic top toy

A wheel-shaped top with magnetic spindles projecting from the body. A circular disc with a beaded rim is mounted on each end of a shaft; the rims of the discs forming a two-rail track encircling the shaft. A handle has two legs attached to opposite ends of the shaft. The spindles are magnetically attached to the two-rail track. The top orbits around the track in response to hand-manipulation of the handle; it is launched from the track when the orbital speed is sufficient to centrifugally separate the spindles from the track to spin on a surface, and can be magnetically retrieved, while spinning, by engagement of the spindles with the shaft, or with one or both of the discs.