(under subclass 291) Systems, wherein the current or voltage supply to the load device is controlled by (1) two or more diverse type regulating means, or (2) two or more regulating means of the same or diverse type which are operated by separate operating means, or (3) two or more regulating means connected in the system in different ways so as to control the current and/or voltage by exercising different effects in the systems.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems,
31+, for plural load circuit systems having regulators therefor.
323, Electricity: Power Supply or Regulation Systems,
220, 354 for miscellaneous regulators which may have diverse type regulating means.
