US PATENT SUBCLASS 313 / 252
.~.~.~ Support structure supported by the 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}
252.~.~.~ Support structure supported by the envelope {7}
253  DF  .~.~.~.~> At spaced or opposed portions of envelope {2}
256  DF  .~.~.~.~> Insulating or ceramic support rod or tube
257  DF  .~.~.~.~> With spacer between electrode or electrode supports {4}
263  DF  .~.~.~.~> With indirectly heated cathode
264  DF  .~.~.~.~> With U-shaped, V-shaped, or plural sections filament
265  DF  .~.~.~.~> Apertured electrode (e.g., grid) supported between two other electrodes
266  DF  .~.~.~.~> Stem or envelope structure

DEFINITION

Classification: 313/252

(under subclass 244) Discharge devices having electrodes which are supported by supporting structure, such as wires, rods, or tubes, the supporting structure being supported by the envelope.

SEE OR SEARCH THIS CLASS, SUBCLASS:

11+, for devices under the class definition which are provided with an envelope and which have a heat transfer device (e.g., radiating fins, etc..) or means to modify the temperature of the device (e.g., heat conserving means) mounted upon the electrode or electrode support. See subclass 37 where the filament or cathode is provided with such means, subclass 39 where the heat transfer means or temperature modifying device is for an electrode, and subclass 42 where such means are mounted upon an electrode support.

245, where the discharge device has the electrodes arranged to form a plurality of separate discharge spaces (e.g., has plural cathodes and/or anodes).

246+, where at least one of the electrodes forms at least part of the envelope wall.

248, in which the envelope is formed of conductive material the electrode supports being supported by the conductive envelope wall.

249+, where the envelope is elongated and the electrodes are mounted in spaced relation along the longitudinal axis of the envelope. 284+, and the subclasses specified in the notes thereto for devices within the class definition which have an envelope and an electrode supported by a supporting member which is supported by the envelope.

SEE OR SEARCH CLASS

174, Electricity: Conductors and Insulators,

50.54, for miscellaneous hermetically sealed envelopes of general application which are limited to electrical use which include means to mount an electrical device within the envelope.