Cold-cathode tubes

Full Title

Gas-filled discharge tubes with solid cathode (H01J25/00, H01J27/00, H01J31/00 - H01J41/00 take precedence; gas filled spark gaps H01T; Marx converters H02M7/26) > Cold-cathode tubes

Child Classifications

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• H01J 17/40 with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes, (cathode-glow lamps H01J61/04)
• H01J 17/48 with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron