Patent ID: 7771202

Claim:
An apparatus for transferring alternating current (AC) electrical power ( 303 ) comprising: (a) a concentric mobile unit ( 302 ) including: (i) a concentric mobile unit body ( 302 a ) having a cylindrical wall and a flat base surface, having a pre-selected outer diameter value (D 4 ); (ii) a concentric mobile unit ground contact element ( 32 ca ) disposed concentrically inside said concentric mobile unit body ( 302 n ) at said base, having said pre-selected outer diameter value (D 4 ); (iii) a concentric mobile unit phase contact element ( 32 ba ) disposed concentrically inside said concentric mobile unit body ( 302 a ) at said base; (iv) a concentric mobile unit zero contact element ( 32 aa ) disposed concentrically inside said concentric mobile unit body ( 302 a ) at said base; and (v) a concentric mobile unit ground magnet ( 32 ec ) disposed concentrically inside said concentric mobile unit body ( 302 a ), having a pre-selected outer diameter value (D 3 ).