John C. Hanner
General Contractor at Lk Hl Dr, Raleigh, NC

4247808, Jan 27, 1981

Jan 11, 1978

5/868520

John C. Hanner - Raleigh NC

H02P 724

318345G

The commutator or commutators of a DC motor are uniquely arranged with a plurality of peripherally spaced, current carrying segments separated by relatively large, electrically dead, non-conducting spaces, each of the dead spaces being at least as wide in a peripheral direction as the corresponding width dimension of the brushes positioned adjacent thereto. A silicon controlled rectifier (SCR) is arranged in the circuit between the negative pole of the voltage source and the commutator input terminal and acts as a switch to automatically cut off current flow therethrough each time a brush leaves a commutator segment. The current is not re-established until the SCR is again gated, which time may be varied by a variable resistor/capacitor gating circuit. To prevent stoppage of the motor with the brushes of the commutator in a dead space a plurality of commutators are provided with the segments thereof staggered with relation to the first. Each of the additional commutators is provided with its own SCR time delay circuit for automatically cutting off and re-establishing current to the segments of the additional commutator(s).

4479079, Oct 23, 1984

Oct 21, 1983

6/544255

John C. Hanner - Raleigh NC

H02P 728

318345G

The commutator of a DC motor is uniquely constructed to include at least one dead segment at least as wide as the associated brush (brushes). A silicon controlled rectifier (SCR) is arrranged in the circuit between the voltage source and said brush (brushes) to provide a switching means to automatically cut off current flow therethrough each time a brush passes over the dead segment. The current is reestablished by way of a gating means, which in the preferred embodiment is a variable frequency pulse generator.