(under subclass 293) Discharge devices which have a plurality of separate cathodes.
(1) Note. The discharge device may be provided with a nonemissive electrode (e.g., anode) in addition to the apertured or grid-like electrode so that the discharge device has a plurality of separate inter-electrode spaces and the apertured or grid-like electrode may be interposed in both of the inter-electrode spaces or may be interposed in only one of the inter-electrode spaces, or the discharge device may have only a plurality of separate cathodes with the apertured or grid-like electrode disposed in the space between two of the cathodes.
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5+, for plural unit discharge devices which have at least two cathodes and an anode for each cathode, one or more of the inter-electrode spaces having an apertured or grid-like electrode therein.
245, for discharge devices which have significant supporting and/or spacing structure for a plurality of electrodes which form a plurality of separate discharge spaces.
298, where the discharge device has a plurality of separate discharge spaces with a plurality of superimposed apertured or grid-like electrodes in at least one inter-electrode space.
301, where the discharge device has a plurality of inter-electrode spaces with a plurality of apertured or grid-like electrodes interposed in the inter-electrode space in nonsuperimposed relation.
306+, and the subclasses specified in the notes thereto for other discharge devices provided with a plurality of separate cathodes.
409+, for cathode ray tubes which have a plurality of cathodes and an apertured or grid-like electrode interposed in the space between one of the cathodes and the target.
597+, where the discharge device has an envelope containing a gas or vapor.
