US PATENT SUBCLASS 315 / 48
.~.~ Cathode or cathode heater in the shunt circuit

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315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

32  DF  COMBINED LOAD DEVICE OR LOAD DEVICE TEMPERATURE MODIFYING MEANS AND ELECTRICAL CIRCUIT DEVICE STRUCTURE {19}
46  DF  .~ Filament, electric heater, or resistance in shunt with the discharge electrodes of a discharge device load {2}
48.~.~ Cathode or cathode heater in the shunt circuit

DEFINITION

Classification: 315/48

(under subclass 46) Subject matter, wherein (1) the cathode heater is connected in electrical shunt to the discharge electrodes, or (2) having the filament which is connected in

electrical shunt designed to function as a cathode in the operation of the device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47, for this subject matter when an automatic switch is included in the shunt circuit.