US PATENT SUBCLASS 315 / 47
.~.~ Automatic switch in the shunt circuit

Current as of: June, 1999
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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}
47.~.~ Automatic switch in the shunt circuit

DEFINITION

Classification: 315/47

(under subclass 46) Subject matter, having an electric switch connected in the shunt circuit which includes the filament, heater or resistance, the switch being provided with means for automatically operating the switch in response to some condition affecting the operation of the device.

(1) Note. In some of the devices in this subclass, the switch is designed to open the shunt circuit of the filament, heater or resistance when the discharge device or the cathode have become heated sufficiently to establish a discharge between the electrodes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107, and the subclasses specified in the notes to the definition of that subclass, for other discharge device loads under the class definition provided with a cathode or cathode heater, and an automatically operating electric switch in the cathode or cathode heater circuit.