Electricity: motive power systems – Motor structure adjustment or control – Brush or other current-collector control
Patent
1977-05-02
1979-02-27
Schaefer, Robert K.
Electricity: motive power systems
Motor structure adjustment or control
Brush or other current-collector control
318361, 318429, 318541, H01R 3943
Patent
active
041421388
ABSTRACT:
An apparatus and a method is described for smoothing the acceleration and deceleration of an electric motor. This is accomplished by using a pair of brush springs (strong and weak) for each brush of an electric motor. At low speeds, the strong spring is retracted so that the force with which the brush is applied to the motor commutator is greatly reduced. This reduced frictional force improves the smoothness of the acceleration and deceleration characteristics of the motor at low speeds.
REFERENCES:
patent: 3867679 (1975-02-01), Smith
Hayden Mark W.
Taylor David C.
E. I. Du Pont de Nemours and Company
Indyk Eugene S.
Schaefer Robert K.
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