Priority date (The priority date 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 date listed.)
Publication of NL219295ApublicationCriticalpatent/NL219295A/xx
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
H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
H01J1/28—Dispenser-type cathodes, e.g. L-cathode
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
H01J3/02—Electron guns
H01J3/026—Eliminating deleterious effects due to thermal effects, electric or magnetic field
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
H01J3/02—Electron guns
H01J3/027—Construction of the gun or parts thereof
Mittelbar beheizte Vorratskathode mit einem Vorratsbehaelter und einem diesen und den Heizer umgebenden, gleichzeitig der Halterung der Kathode dienenden Strahlungsschutzmantel