US PATENT SUBCLASS 313 / 264
.~.~.~.~ With U-shaped, V-shaped, or plural sections filament


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

238  DF  WITH SUPPORT AND/OR SPACING STRUCTURE FOR ELECTRODE AND/OR SHIELD {9}
243  DF  .~ For plural electrodes of discharge device {3}
244  DF  .~.~ Envelope supports or forms electrode {5}
252  DF  .~.~.~ Support structure supported by the envelope {7}
264.~.~.~.~ With U-shaped, V-shaped, or plural sections filament


DEFINITION

Classification: 313/264

(under subclass 252) Discharge devices having supporting means for a U-shaped, V-shaped or plural section filament.

(1) Note. W-shaped filaments are included as V-shaped filaments.

(2) 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.

SEE OR SEARCH THIS CLASS, SUBCLASS:

260+, where the discharge device has a plurality of electrodes including a U-shaped, V-shaped or plural section filament mounted in side by side, co-axial or concentric relation, one end of the electrodes being positioned in substantially co-planar relation, a plate or bar electrode spacer extending across the ends of the electrodes. See subclass 261 where the device has a plate or bar electrode spacer at each end of the electrode assembly.

271+, for other devices under the class definition which have supporting structure for filaments.