Patent ID: 7383747

Claim:
An apparatus comprising: a first ring-like mass rotating in a first plane, said first ring-like mass comprising a first material, said first material comprising a first density, said first ring-like mass being contained within a first containment ring; a second ring-like mass rotating in a second plane, said second ring-like mass comprising a second material, said second material comprising a second density, said second ring-like mass being contained within a second containment ring; a third ring-like mass rotating in a third plane, said third ring-like mass comprising a third material, said third material comprising a third density, said third ring-like mass being contained within a third containment ring, wherein said first density is different from said second density and said third density; and said second density is different from said third density; a first rotatable joint connecting said first containment ring to said second containment ring; a second rotatable joint connecting said second containment ring to said third containment ring; and a control program, said control program being configured to control the planar orientation of at least one of said first ring-like mass and said second ring-like mass and said third ring-like mass.