Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps

Child Classifications

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• H01J 7/02 Selection of substances for gas fillings; Specified operating pressure or temperature
• H01J 7/14 Means for obtaining or maintaining the desired pressure within the vessel
• H01J 7/24 Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
• H01J 7/30 Igniting arrangements
• H01J 7/42 Means structurally associated with the tube or lamp for indicating defects or previous use
• H01J 7/44 One or more circuit elements structurally associated with the tube or lamp