Patent ID: 7560848

Claim:
An electrical machine having at least four exciter poles in the stator and having a commutator rotor which has a number of slots and pole teeth on its circumference, which number is greater than the number of exciter poles, having a number of commutator laminations which is twice as large as the number of pole teeth, and having at least one pair of stationary carbon brushes which are offset from one another by a pole pitch of the exciter pole and cooperate with the laminations of the commutator for supplying current to coils which are each wound onto one of the pole teeth, and the diametrically opposed laminations are each joined together via contact bridges, the improvement wherein, there is an even number of slots, pole teeth and coils, the beginning and end of one of the coils disposed on adjacent pole teeth is connected directly to a pair of laminations adjacent to one another, and the beginning and end of the other coil is connected via one of the contact bridges to a lamination adjacent to the pair of laminations adjacent to one another.