Patent ID: 8292687

Claim:
A magnetic construction element comprising: a longitudinally extending rod formed of a non-magnetic material; at least one magnet holder disposed at an end of the longitudinally extending rod; a magnet embedded in the magnet holder; and a ferromagnetic material disposed at an intermediate portion of the longitudinally extending rod, the ferromagnetic material being formed of two generally hemispherical portions that are attached to each other with at least a portion of the non-magnetic material of the longitudinally extending rod being disposed within the hemispherical portions when attached to each other, wherein the longitudinally extending rod comprises: a first rod portion; a second rod portion; and a spherical intermediate portion disposed between the first and second rod portions, wherein the hemispherical portions of the ferromagnetic material are disposed around the spherical intermediate portion, wherein the ferromagnetic material comprises a shell disposed around the spherical intermediate portion.