US PATENT SUBCLASS 313 / 304
.~ Plural-parallel-section cathode with electrode surrounding each section


Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

293  DF  DISCHARGING DEVICES WITH APERTURED ELECTRODE (E.G., GRID) INTERPOSED BETWEEN TWO ELECTRODES {6}
304.~ Plural-parallel-section cathode with electrode surrounding each section


DEFINITION

Classification: 313/304

(under subclass 293) Discharge devices which have a cathode which is composed of a plurality of parallel sections, the apertured or grid-like electrode being provided with a plurality of tubular parts, each tubular part of the apertured or grid-like electrode completely surrounding a different one of the parallel sections of the cathode.

(1) Note. The tubular apertured or grid-like electrode sometimes has the form of a figure 8 in cross-section, a cathode section being disposed within each loop of the figure 8 with the cathode extending parallel to the longitudinal axis of the tubular apertured or grid-like electrode.

SEE OR SEARCH THIS CLASS, SUBCLASS:

264, for discharge devices which include significant supporting and/or spacing structure for a plural section filament.

302, for discharge devices having a plurality of separate cathodes and a foraminous or grid-like electrode interposed in the inter-electrode space.