Automatic brush shifting for a D.C. series motor
OwnerWarren E. Moodyinventor
Life of this patent
Estimating the term…
Abstract
Electromagnetic or solenoid means responsive to load current to automatically shift the brushes of a motor or generator a proper amount so as to maintain satisfactory commutation from light to full load, the brush shifting means including electric solenoid means carrying machine load current, movable brush holding means mounted on antifriction bearings, and mechanically connecting the electric solenoid means mounted on a machine frame means to brush holder means so as to shift brushes in conformity to changing load conditions.
Claims4
In a motor or generator, a frame, an armature including a commutator supported in said frame, antifriction bearings supported by said frame, a yoke means supported by said antifriction bearings for a circumferential rotational movement relative to said commutator, a plurality of brushes supported by said yoke means in operative contact with said commutator and rotatable with said yoke relative to said commutator, electromagnetic means including at least one solenoid means supported by said frame and mechanically connected to said yoke means for moving said yoke means and said brushes supported thereby circumferentially relative to said commutator, said solenoid being responsive to load current to automatically shift said brushes in conformity to changing load conditions from light to full load.
Dependencies are inferred from the claim text.