US PATENT SUBCLASS 315 / 106
.~.~ Automatic cut-out or voltage regulator in the cathode or heater circuit

Current as of: June, 1999
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315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

94  DF  WITH CATHODE OR CATHODE HEATER SUPPLY CIRCUIT {6}
105  DF  .~ Pulsating or A.C. supply to the cathode or heater circuit {1}
106.~.~ Automatic cut-out or voltage regulator in the cathode or heater circuit

DEFINITION

Classification: 315/106

(under subclass 105) Systems provided with (1) means to open the cathode or the cathode heater circuit, or (2) means to regulate the current supplied to the cathode or the cathode heater circuit, such means being automatically operated in response to some condition.

(1) Note. The condition causing the opening of the cathode circuit may be (1) when the cathode or cathode heater supply voltage and/or current becomes too low or too high for proper operation of the load device, or (2) when more or less than the desired electrical impedance is present in the cathode or

cathode heater circuit or (3) when the load device fails to operate in the desired manner, or (4) any condition affecting the operation of the load device. The current supplied to the cathode may be regulated automatically in response to any condition affecting the operation of the load device, such as, the temperature of the load device or the surrounding atmosphere, or the variations of potential of the source of supply.

SEE OR SEARCH THIS CLASS, SUBCLASS:

99+, for systems under subclass 98, wherein the discharge device is provided with a plurality of cathodes or cathode heaters being connected in series relation until they have reached their operating temperature, the series connection then being automatically opened so that the main discharge may be initiated.

107, for other systems under subclass 94 provided with means for automatically opening the cathode or cathode heater circuit or for automatically regulating the current supplied to the cathode or cathode heater.

114, and 116, for systems under the class definition having electrical means to heat the load device, the circuit supplying electric current to the heating means being provided with an automatic cutout or voltage regulator. 119+, for systems provided with means for automatically opening the circuit of the load device in response to some condition affecting the operation of the load device.

307+, for systems under the class definition provided with means for automatically regulating the current and/or potential supplied to the load device in response to some condition affecting the operation of the load device.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems,

220, 354, for miscellaneous systems for controlling the magnitude of the current and/or potential in a single circuit.