US PATENT SUBCLASS 313 / 263
.~.~.~.~ With indirectly heated cathode

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  DF  .~.~.~ Support structure supported by the envelope {7}
263.~.~.~.~ With indirectly heated cathode

DEFINITION

Classification: 313/263

(under subclass 252) Discharge devices having supporting

means for an indirectly heated cathode.

SEE OR SEARCH THIS CLASS, SUBCLASS:

260+, where the discharge device has a plurality of electrodes including an indirectly heated cathode mounted in side by side, co-axial, or concentric relation, one end of the electrodes being positioned in substantially coplanar relation, a plate or bar electrode spacer extending across the ends of the electrodes. See subclass 261 where the discharge device has a plate or bar electrode spacer at each end of the electrode assembly.

270, for other supporting structure for indirectly heated cathodes.