US PATENT SUBCLASS 313 / 247
.~.~.~.~ Hollow electrode with another electrode supported by end structure

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  DF  .~.~.~ Electrode forms part of envelope {1}
247.~.~.~.~ Hollow electrode with another electrode supported by end structure

DEFINITION

Classification: 313/247

(under subclass 246) Discharge devices wherein the electrode which forms part of the envelope wall is in the form of a hollow body having an open end, the open end being closed either by means of another electrode which is electrically insulated from the hollow electrode or by a closure which supports another electrode in electrical insulating relation with respect to the hollow electrode.