(under the class definition) Subject matter having at least two light supports which are movable with respect to an energy source or one light bulb with plural energy source contacts which is movable with respect to an energy source.
(1) Note. The light support or light bulb are moved because one or the other has failed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
20, for a light source substitution done automatically.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices,
236, for electric lamps, per se, which are provided with a spare electrode to replace a defective electrode, subclass 237 for electric lamps, per se, which are provided with means to replace a defective electrode or which are readily demountable so as to be easily repaired, and subclasses 272 and 316 for plural filament incandescent lamps.
315, Electric Lamp and Discharge Devices: Systems,
87, and 88, and indented subclasses for electric lamp and electric space discharge device systems provided with means to substitute another lamp or electric space discharge device for the operating lamp or discharge device if the operating lamp or discharge device fails to operate properly. Class 362 provides for such subject matter when the protector, support, or light distributor is claimed.
340, Communications: Electrical,
500+, for means automatically responsive to a condition and search class for other classes with related art.
