Mpc Products Corporation

Craig H Scott

Stephen B Warner

Anton A Petrou

Wayne C Penfold

Jerry D Hielkema

David J Stapleton

A brush holder assembly comprises a non-conductive brush holder body covered by a printed wiring board cover. The brush holder body includes a brush cavity for holding a brush, a spring cavity for holding a spring and a shunt wire cavity for holding a shunt wire. The spring is configured to hold the brush in contact with a commutator at a constant brush pressure throughout the entire length of brush travel. The brush holder body and printed wiring board cover are configured to enclose the brush, spring and shunt wire thus protecting the brush, spring and shunt wire.

Brush holder for producing a constant brush pressure

The damper is comprised of a set of core rotor magnets arranged in an opposing north/south configuration. A conducting material cylindrically encircles the rotor magnets. A set of stator magnets laterally encircle the conducting material and are arranged in the same manner as the rotor magnets. A system of gears are coupled to the damper shaft and control the rotation of the rotor magnets such that they can be positioned relative to the stator magnets to set up the desired damping torque. As the rotor and stator magnets of opposite polarity approach each other, the eddy-current in the rotating conducting material increases causing the conducting material to generate a field in response to the eddy-current. The damping torque is caused by the magnetic force generated when the induced field in the material and the stator/rotor field attempt to line up.

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Prospect Heights, IL, United States of America

Craig H Scott