US PATENT SUBCLASS 314 / 1
AUTOMATIC SUBSTITUTION OF DISCHARGE DEVICE, ELECTRODE OR LAMP

Current as of: June, 1999
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314 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: CONSUMABLE ELECTRODES

1AUTOMATIC SUBSTITUTION OF DISCHARGE DEVICE, ELECTRODE OR LAMP {3}
2  DF  .~> With current-shifting switch
3  DF  .~> Differential separation type
4  DF  .~> Common electrode-operating type {2}

DEFINITION

Classification: 314/1

(under the class definition) Subject matter having (a) two or more discharge devices, at least one of which is of the consumable electrode type, or (b) a consumable electrode device and a lamp, or (c) a consumable electrode discharge device having a plurality of cathodes and/or anodes, and provided with means for operating one of the discharge devices, lamps, or one of the cathodes and/or anodes and its corresponding electrode while the other discharge device, lamp or electrode is maintained in a nonoperative condition until the first operated device or electrode fails, either through consumption of the electrode, or some other condition rendering it inoperative, and having means provided which operate automatically in response to either the failure of the first operated device or electrodes, or the consumption of the electrode in the consumable electrode device, to place the other device or electrodes in operative condition whereby such other device or electrodes are substituted for the first operated device or electrodes.

(1) Note. The device or electrodes which are substituted for the first operated device or electrodes need not be in the same electrical circuit, and the substitution may be made for the purpose of maintaining a discharge, or maintaining the light, or maintaining a load in the circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

9, for discharge devices and systems under the class definition provided with a signaling means, or alarm means to indicate some condition in the discharge device.

10, and indented subclasses, for discharge devices and systems under the class definition provided with automatically operating means to complete an electrical circuit in shunt about the discharge device or some part thereof, and/or to open the electric circuit of the discharge device or some part thereof, such means being automatically operated in response to some condition of the discharge device which prevents further operation of the discharge device in the normal manner.

34, for discharge devices under the class definition and the current supply systems therefor wherein the discharge device is provided with at least two principal electrodes and an auxiliary starting electrode, the discharge being initiated between one of the principal electrodes and the starting electrode, the discharge being then transferred to the other principal electrode and maintained only between the principal electrodes. SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

236, for miscellaneous space discharge devices which are provided with a spare electrode to be used in place of a defective electrode, and subclass 237 for miscellaneous discharge devices which are especially designed so that a defective electrode may be replaced or especially designed to be readily taken apart so that they may be repaired.

315, Electric Lamp and Discharge Devices: Systems,

87, and subclass 88, for miscellaneous current supply systems for electric lamps and/or electric space discharge devices other than consumable electrode discharge devices, the system being provided with automatically operated means for substituting another lamp, discharge device, or electrode when the first operated lamp, discharge device, or electrode fails to operate properly.

362, Illumination,

20, for lanterns designed to use a plurality of light sources, one of which may be an arc lamp, and provided with means for automatically substituting another light source in event the first operated light source is destroyed or extinguished.