Details of vacuum tubes of the types covered by group H01J21/00

Child Classifications

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• H01J 19/02 Electron-emitting electrodes; Cathodes
• H01J 19/28 Non-electron-emitting electrodes; Screens
• H01J 19/42 Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
• H01J 19/54 Vessels; Containers; Shields associated therewith
• H01J 19/58 Seals between parts of vessels
• H01J 19/60 Seals for leading-in conductors
• H01J 19/62 Leading-in conductors
• H01J 19/64 Means forming part of the tube for the purpose supporting it
• H01J 19/66 Means forming part of the tube for the purpose of providing electrical connection to it
• H01J 19/68 Specified gas introduced into the tube at low pressure, e.g. for reducing or influencing space charge
• H01J 19/70 Means for obtaining or maintaining the vacuum, e.g. by gettering
• H01J 19/74 Cooling arrangements (cooling of anodes H01J19/36)
• H01J 19/76 Means structurally associated with the tube for indicating defects or previous use
• H01J 19/78 One or more circuit elements structurally associated with the tube
• H01J 19/82 Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for