(under subclass 113) Systems wherein the load devices are provided with electrical heating means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
95, and indented subclasses, for systems under the class definition provided with a plurality of discharge device load devices, the discharge devices having either thermionic cathodes designed to be heated by the passage of an electric current or indirectly heated cathodes, the system including means to supply electric current to the cathode or the cathode heater element.
