US PATENT SUBCLASS 313 / 246
.~.~.~ Electrode forms part of envelope

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}
243  DF  .~ For plural electrodes of discharge device {3}
244  DF  .~.~ Envelope supports or forms electrode {5}
246.~.~.~ Electrode forms part of envelope {1}
247  DF  .~.~.~.~> Hollow electrode with another electrode supported by end structure

DEFINITION

Classification: 313/246

(under subclass 244) Discharge devices having at least one of the electrodes forming at least part of the envelope wall.

(1) Note. This and the indented subclasses include patents for discharge devices where the device has at least a portion of the envelope formed of metal or conductive material, the metal or conductive portion of the envelope being defined as an electrode, and where the claims include the supporting and/or spacing structure for a plurality of electrodes. Where only a single electrode which forms at least part of the envelope wall is claimed, the patent is classified in Class 220, Receptacles, subclass 2.3 if only envelope structure is claimed or in subclasses 317+ of class 313 if structure is claimed which limits the device to being a discharge device. See the class definition. Where the conductive envelope forms a shield for the enclosed electrodes, and supporting or spacing structure for the electrodes is claimed the patent is classified in subclasses 239+. (See (2) Note to the definition of subclass 239). Where the conductive envelope forms neither a shield nor an electrode, but has a plurality of electrodes supported by the conductive wall portion, the patent is classified in subclass 248. Envelopes, per se, which have a conductive wall portion are in subclasses 317+ or in one of the classes specified in the notes to the definition of that subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18+, for discharge devices which have an electrode forming part of the envelope wall and which have a casing or jacket surrounding the electrode, the casing or jacket being designed to receive a heat transfer medium (e.g., fluid cooled metal envelope devices).

239+, see (1) Note above.

248, see (1) Note above. 281, for devices having an electrode supported in an aperture in a conductive wall.

282, for devices having an electrode supported by supports which form part of or are attached to the conductive wall of an envelope.

317+, see (1) Note above.

SEE OR SEARCH CLASS

220, Receptacles,

2.3, see (1) note above.