Patent ID: 7834503

Claim:
A rotating electromagnetic apparatus comprising: a stator frame supporting spaced apart pairs of permanent magnets, the permanent magnet pairs arranged with like magnetic poles thereof in mutually facing positions; a toroidally shaped rotor frame of magnetically permeable material having an outer circumferential surface, an inner circumferential surface, and a pair of side surfaces positioned adjacent to the pairs of permanent magnets, the rotor frame mounted on an axle rotationally supported by the stator frame, the rotor frame having a plurality of spaced apart pairs of radially directed slots in the side surfaces; a plurality of wire coils wound around the rotor frame, with each one of the wire coils lying inside one of the spaced apart pairs of the slots and on the outer and inner circumferential surfaces, wherein no part of the wire coils extends laterally away from, or on, the side surfaces, and a plurality of contacts mounted on the rotor frame and rotational therewith, each one of the contacts in electrical common with one of the wire coils, the wire coils thereby in brief electrical communion with each one of a plurality of fixed brushes mounted on the stator frame, the brushes each having a generally right-triangular cross-sectional shape providing a hypotenuse surface thereon in position for contacing the contacts during rotation of the rotor frame.