Abstract: An electric motor having a first rotor, a second rotor and a third rotor, a first permanent magnet, a second permanent magnet and a third permanent magnet, a first stator and a second stator, a first electromagnet and a second an electromagnet with one end of the core larger than the other, a shaft, a shaft rotation position sensor and an electric switch.

Abstract: The track wall system includes at least one elongated track having a base and opposite sidewalls extending from the base, the base and sidewalls defining a stud layout trough therebetween, each of the sidewalls includes a plurality of pairs of discontinuous stud holding notches disposed at regular intervals along the length of the track, each pair of stud holding notches defines a space therebetween adapted to hold a stud, a plurality of studs disposed between opposing pairs of stud holding notches, and each notch includes projections that securely holds the stud for fast and reliable installation of a wall frame . . . .

Abstract: An electric motor that includes a first rotor, a second rotor, a first permanent magnet, a second permanent magnet, a stator, an electromagnet, a shaft, a shaft rotation position sensor and an electric switch, the first rotor being mounted on the shaft, the second rotor being mounted on the shaft and separated from the first rotor by the stator, the first permanent magnet being located in the first rotor, the second permanent magnet being located in the second rotor, the north south orientation of the first permanent magnet being the same as the north south orientation of the second permanent magnet, the north south axis of the first and second permanent magnets each being spaced radially from the longitudinal axis of the shaft, the north south axis of the first and second permanent magnets each being about parallel with the longitudinal axis of the shaft, the north south axis of the first permanent magnet being spaced rotationally from the north south axis of the second permanent magnet, the electromagnet be