US PATENT SUBCLASS 315 / 119
WITH AUTOMATIC SHUNT AND/OR CUTOUT

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

119WITH AUTOMATIC SHUNT AND/OR CUTOUT {6}
120  DF  .~> Combined with signal, indicator, or alarm
121  DF  .~> Plural load device systems {1}
123  DF  .~> Plural shunts and/or cut-outs
124  DF  .~> Auxiliary electrode controlled
125  DF  .~> Shunt circuit closing {1}
127  DF  .~> Supply circuit current and/or potential actuated switch {1}

DEFINITION

Classification: 315/119

(under the class definition) Systems provided with means to complete an electrical circuit in shunt about a load device or some part thereof, and/or to open the load device current supply circuit, such means being automatically operated (1) when the load device becomes nonconductive or fails to operate properly, or (2) when the supply voltage and/or current becomes too low or too high for the proper operation of the load device or (3) when more than a desired number of load devices are connected to the supply circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

74, for lamps and discharge devices which have structurally combined therewith, so as to form a unitary device, an automatically operating electric switch which is connected with the lamp or discharge device so as to either open the circuit or close a shunt circuit about the lamp or discharge device when it fails to operate properly.

88, and indented subclasses, for systems provided with (1) two or more load devices, or (2) a load device of the electric discharge type having a plurality of cathodes and/or anodes, or (3) an electric lamp provided with two or more filaments, and provided with means for automatically substituting for (a) one of the load devices, another of the

load devices, or (b) the first operated electrode, another electrode, or (c) the first operated filament, another filament, when the first operated device, electrode, or filament fails to operate properly.

106, and 107, for systems under the class definition wherein the load device is a discharge device having a thermionic cathode heated by the passage of electric current or an indirectly heated cathode, the cathode or cathode heater circuit including means to automatically open the cathode or the cathode heater circuit in response to some condition affecting the operation of the load device.

114, and 116, for systems wherein the load device is provided with electric heating means, the current supply circuit for the heating means being provided with an automatic cutout. 118, for systems under the class definition wherein the load device is provided with a temperature modifying means, the temperature modifying means controlling the operation of a cutout switch for the load device.

129, and indented subclasses, for systems provided with signal means, indicating means, and/or alarm means operated by some means responsive to a condition of the load device to indicate such condition.

340, for other systems under the class definition wherein the load device is a discharge device and the system includes means in the cathode-anode circuit for interrupting or extinguishing the flow of electric discharge current between the cathode and the anode.

360, for systems provided with a time controlled means for (1) supplying a current to the load device for a predetermined time, or (2) interrupting the supply of current to the load device after a predetermined time lapse.

SEE OR SEARCH CLASS

314, Electric Lamp and Discharge Devices: Consumable Electrodes,

10, and indented subclasses, for consumable electrode discharge devices, and the systems therefor, provided with an automatic shunt circuit closing means or an automatic cutout means.