(under subclass 315) Lamps which are provided with a plurality of filaments or glowers, the filaments or glowers being provided with separate terminals so that the filaments or glowers are adapted to be independently energized.
(1) Note. One terminal may have a plurality of filaments or glowers connected to it, the filaments or glowers being provided with separate terminals for the other ends of the filaments or glowers so that they may be independently energized.
(2) Note. See notes (2) to (4) in the definition of subclass 315 with respect to the classification of multiple filament lamps in the subclasses which precede subclass 315 and this indented subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
115, where the lamp has a reflector integrally combined therewith.
236, for multiple filament electric lamps which are provided with means, other than the mere terminals of the lamp, so that one of the filaments or glowers may be used to the exclusion of the other, the means being capable of selecting either of the filaments or glowers for use.
272, for lamps which including significant supporting and/or spacing structure for a plurality of filaments or glowers. Where the only significant lamp structure claimed is the supporting and/or spacing structure for the filaments or glowers, either with or without the enclosing envelope, the patent is classified in subclass 272. Where structure is disclosed or claimed in addition to the supporting and/or spacing structure for the filaments or glowers, the patent is classified in subclass 272 and cross-referenced to this subclass. SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems,
64+, where the lamp has structurally combined therewith a circuit element such as an electric switch or impedance. Note that indented subclass 65 has multiple filament or glower lamps which include switch means in the lamp to energize one filament when another filament fails to operate properly.
