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
Anordnung zum Anzeigen, Messen oder Verstaerken kleiner Stromimpulse mittels Elektronenroehren, bei denen der zu messende Strom ganz oder teilweise zur Heizung der Kathode verwandt wird, und die im Saettigungsgebiet arbeiten