Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical or ion-optical arrangements H01J3/00)

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• H01J 1/02 Main electrodes
• H01J 1/46 Control electrodes, e.g. grid (for igniting arrangements H01J7/30); Auxiliary electrodes (auxiliary anodes for maintaining a discharge H01J1/36)
• H01J 1/50 Magnetic means for controlling the discharge
• H01J 1/52 Screens for shielding; Guides for influencing the discharge; Masks interposed in the electron stream
• H01J 1/53 Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted, or stored
• H01J 1/54 Screens on or from which an image or pattern is formed, picked-up, converted, or stored; Luminescent coatings on vessels
• H01J 1/88 Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies