US PATENT SUBCLASS 315 / 88
AUTOMATIC SUBSTITUTION OF THE LOAD DEVICE OR ELECTRODE

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

88AUTOMATIC SUBSTITUTION OF THE LOAD DEVICE OR ELECTRODE {5}
89  DF  .~> Plural substitution of load devices or electrodes
90  DF  .~> Plural load devices with selective substitution of load device or electrode
91  DF  .~> Over-voltage or over-current controlled substitution
92  DF  .~> Diverse-type load device or electrode substituted
93  DF  .~> With current shifting switch

DEFINITION

Classification: 315/88

(under the class definition) Systems having (1) a nonoperating load device connected in the circuit in addition to a load device connected in operating condition in the circuit, or (2) a load device connected in the system which has at least one nonoperating electrode in addition to the electrode or electrodes which are connected in operating relation in the circuit; the system being arranged to operate the operating load device or electrode while the nonoperating

load device or electrode is maintained in a nonoperative condition until the first operated load device either fails to operate properly, or is subjected to such excessive voltage or current conditions as would tend to damage the operating load device or electrode, the system being provided with means which operate automatically in response to either such failure of the first operated device or electrodes, or in response to such excessive voltage or current conditions to connect the nonoperating load device or electrode in operative relation in the system whereby such nonoperating load device or electrode is substituted for the first operated device or electrodes.

(1) Note. In systems provided with an incandescent lamp as the load device, the filament or other incandescent body is considered to be an electrode within the meaning of this subclass.

(2) Note. This subclass includes systems wherein the load device is a discharge device having a plurality of cathodes and/or anodes, one of the cathodes or anodes and its corresponding electrode being connected in operative relation in the circuit until one of these electrodes fails or is subjected to excessive voltage or current when the automatically operating means connects the nonoperated electrode in operative condition in the circuit so as to substitute the such electrode for the first operated electrode.

(3) Note. This and the indented subclasses are not restricted to gas or vapor discharge device or electric lamps as the load device, but include all discharge systems which are provided with means to automatically substitute another discharge device for the operating discharge device when the operating discharge device fails to operate properly excepting such systems in which the discharge device load is a discharge control discharge device other than the discontinuous control type gas or vapor discharge device and the system includes means to supply current and/or potential to the discharge control means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

65, for multiple filament load devices which have structurally combined therewith automatically operating means to substitute a second filament for the first operated filament when the first operated filament fails to operate properly. 87, for this subject matter where the system also includes automatically operated means to substitute a second source of power supply for the first operated source of power supply.

129, and indented subclasses, for systems having a signal, indicator, or alarm which may be a lamp or discharge device, and see the reference to this subclass (88) in the notes to the definition of subclass 129 for the line between this

subclass (88) and subclass 129.

312, and the subclasses specified in the notes to the definition of that subclass for other plural load device systems under the class definition.

334, and indented subclasses and the subclasses specified in the notes to the definition of those subclasses for other plural cathode and anode discharge device loads.

SEE OR SEARCH CLASS

314, Electric Lamp and Discharge Devices: Consumable Electrodes,

1, and indented subclasses for consumable electrode discharge devices and the systems therefor, provided with (1) automatic means, for substituting another consumable electrode discharge device or other discharge device or lamp for the first operated consumable electrode discharge device, or (2) automatic means for substituting a consumable electrode discharge device for a first operated discharge device or lamp, or (3) automatic means for substituting another electrode for the first operated electrode of the consumable electrode discharge device.

362, Illumination,

254, and indented subclass for illuminating devices provided with an electric lamp, device including means for substituting another light source for the light source in use in event the light source in use is destroyed or extinguished.

363, Electric Power Conversion Systems,

50+, for electronic tube current conversion systems having protective means responsive to dangerous or undesirable conditions within the electronic convertor for correcting the condition or disabling the convertor.