Abstract: A segmented rotor comprises two disc-like members electrically charged with opposite polarities having circumferentially spaced interleaved fingers extending in an axial direction electrically insulated from one another and rotationally driven by an insulated shaft. Suitable brushes extend radially into contact with the interleaved fingers to produce repetitive alternate polarity electrical signals at each brush as the rotor rotates. The electrical signals are fed to utilization devices to control their operation.