Electromagnetic propulsion device as a gun or reversible electric motor
having a barrel with a cavity extending its length, an armature in said
cavity with a permanent magnetic or energized propulsion bus coil, a
plurality of wall conductors orthogonal and circumscribing the cavity
distributed between the cavity ends with contact means at the cavity on
one end and a bus common with all wall conductors on the other and
wherein the magnetic fields of the barrel wall conductor coils
immediately before and after the magnetic field source in an armature
interacts therewith effecting armature motion. Forward and aft armature
current shunts direct current from barrel rails to and from the armature
coil with associated propulsion bus-aft shunt circuit means, when extant,
and to and from said armature propelling wall conductors via said
contacts.