Patent ID: 8847448

Claim:
An electric generator for a railroad train in combination comprising: a stationary axle mounted to a base frame of a railroad car of the railroad train; a wheel mounted on either end of the stationary axle for rotation relative to both the stationary axle and a rail; an iron yoke secured to an outer surface of the wheel; a plurality of spaced, permanent magnets secured to an inner surface of the iron yoke; and a stator secured to either end of the stationary axle and including an armature winding thereon, the armature winding being spaced from the permanent magnets; wherein in response to rotation of the wheel, electric current is produced by the armature winding due to a relative movement of the armature winding and a magnetic field generated by the permanent magnets; wherein the stationary axle is a three-part-insert configuration, detachably tight locking together there between and comprises a small diameter section at one end, a large diameter section at an intermediate portion, and a small diameter section at the other end.