US PATENT SUBCLASS 313 / 275
.~.~ Insulator supports 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}
275.~.~ Insulator supports filament {2}
276  DF  .~.~.~> Conductive member supports insulator
277  DF  .~.~.~> Insulating standard supports filament brackets or anchors

DEFINITION

Classification: 313/275

(under subclass 271) Devices in which the supporting structure for the filament includes an electrically insulating member.

(1) Note. Including in this subclass are supporting structures such as glass or ceramic rods having metal hooks or anchors attached to it for supporting the filament. Also included are supporting structures wherein, a glass bead is mounted upon a metal supporting rod, the glass bead having means for supporting the filament.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257, for discharge devices under subclass 238 which have an envelope and a plurality of electrodes supported by supports, within the envelope, an insulating spacer member being interposed between a plurality of the electrodes or electrode supports, a filament being supported by the insulating spacer member.

289, for other devices under subclass 238 which have an envelope and an electrode other than a filament supported by means of an insulating or ceramic support rod or tube within the envelope.