(under subclass 29) Method including mounting a degasser or substance that absorbs, adsorbs or otherwise binds up undesired gases or aerosols, which degasser or substance is used in a vacuum tube to maintain the desired vacuum or atmosphere therein.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices,
238+, for support and/or spacing structure for electrode and/or shield structure of lamp or discharge devices.