Abstract: A control system for the remote control of functions on a rotating object from a stationary location is disclosed. The control system, in the disclosed embodiment, constitutes a single channel, four function-select, power transmission system with an encoder at the stationary location and a decoder on the rotating object. The encoder is used to develop selected electrical waveform patterns each of which is uniquely correlated with a particular control function to be performed on the rotating object. Each waveform pattern consists of a unique pattern of electrical waveform half cycles. The particular electrical waveform pattern for the particular control function to be performed is transmitted to the rotating object via center contact assemblies which engage opposite ends of a spindle on which the rotating object is supported for rotation.

Abstract: A dynamic balancing system for rotary elements wherein balance is maintained by remote control of mass distribution during rotation. A fluid balancing mass partially fills three or more annular chambers. A change in mass distribution is achieved by heating the fluid in a chamber and conducting the vapor so produced to the opposite chamber(s) where the vapor condenses. A warmer chamber thereby loses mass to a cooler chamber. Electronic vibration measuring means and control are generally employed to determine which chambers and what degree of heating are required to improve the state of balance. The preferred control is electronic and comprises a stationarily mounted encoding portion and rotationally mounted decoding portion. Power and encoded control signals are transmitted via inductively coupled coils from the encoding portion to the decoding portion.