US PATENT SUBCLASS 313 / 273
.~.~ Plural section filament


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

238  DF  WITH SUPPORT AND/OR SPACING STRUCTURE FOR ELECTRODE AND/OR SHIELD {9}
271  DF  .~ For filament {6}
273.~.~ Plural section filament


DEFINITION

Classification: 313/273

(under subclass 271) Devices having supporting and/or spacing structure for a plural section filament.

(1) Note. A plural section filament is a filament which is composed of a plurality of filament wires connected to common leading-in wires. The plurality of filaments may be connected to the leading-in wires so that the filament sections are electrically connected in parallel, or a filament section may be connected to a leading-in wire and a conductive support, another filament section being connected to the same conductive support and another leading-in wire so that the filament sections are electrically connected in series. One of the filament sections may have supports which are separate from the supporting structure for another filament section, the filaments being electrically connected

by leading-in wires which may or may not also be supports for the filament sections.

SEE OR SEARCH THIS CLASS, SUBCLASS:

264, for discharge devices under subclass 238 having an envelope and a plurality of electrodes including a plural section filament supported within the envelope.

272, for devices under subclass 271 for supporting a plurality of separately energizable filaments.