Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
H01J1/00—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
H01J1/02—Main electrodes
H01J1/13—Solid thermionic cathodes
H01J1/135—Circuit arrangements therefor, e.g. for temperature control
Einrichtung zur Kontrolle und (oder) Anzeige des Vakuums in Vakuumentladeapparaten mit Glueh- oder Quecksilberkathode und mit verduennter Gas- oder Dampffuellung, insbesondere in Quecksilberdampfgleichrichtern