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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Shibaura Machine Co Ltd
Original Assignee
Toshiba Corp
Toshiba Machine Co Ltd
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.)
Filing date
Publication date
Application filed by Toshiba Corp, Toshiba Machine Co LtdfiledCriticalToshiba Corp
Priority to JP12368779ApriorityCriticalpatent/JPS5648029A/ja
Publication of JPS5648029ApublicationCriticalpatent/JPS5648029A/ja
Publication of JPH0130247B2publicationCriticalpatent/JPH0130247B2/ja
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
H01J1/15—Cathodes heated directly by an electric current