Patent ID: 7825532

Claim:
An electrical generator for a wheel mounted for rotation on a horizontal axis, said electrical generator comprising: a circular rotor mounted on said wheel and extending concentrically about the horizontal axis for rotation with the wheel in a perimeter path about the horizontal axis, said circular rotor including radially extending opposed sides, a stator positioned at the perimeter path of said rotor, said stator shaped for receiving said rotor and generating electricity in response to the rotation of said rotor, said stator including a pair of opposed stator housings positioned on opposite sides of said rotor, said stator housings each including a field coil opening facing said opposed sides of said rotor, and field coils positioned in each of said stator housings and facing said rotor through said field coil openings, and biasing means for selectively urging said stator housings toward each other and toward said rotor, and second biasing means for continuously biasing said stator housings away from each other and away from said rotor.