Patent ID: 6930429

Claim:
An electric motor comprising: an armature having a plurality of spaced-apart posts defining a plurality of winding slots therebetween; a commutator having a plurality of commutator bars that number twice that of said winding slots; at least one brush disposed adjacent said commutator; a stator disposed coaxially with the armature, said stator having a plurality of spaced apart field coils; said armature including: a first coil having a first subcoil portion and a second subcoil portion having differing numbers of turns; said first subcoil portion being wound in a first pair of spaced apart ones of said slots; said second subcoil portion being wound in a second pair of spaced apart ones of said slots that are offset from said first pair of spaced apart slots; a second coil having a first subcoil portion and a second subcoil portion having differing numbers of turns; said first subcoil portion of said second coil being wound in said second pair of spaced apart slots so as to overlap said second subcoil portion of said first coil; said second subcoil portion of said second coil being wound in a third pair of spaced apart ones of said slots offset from said second pair of spaced apart slots; wherein both of said coils begin commutation at the same angular position relative to said brush; and wherein both of said coils end commutation at the same angular position relative to said brush.