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.)
Expired
Application number
GB11091/26A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Publication of GB251971ApublicationCriticalpatent/GB251971A/en
H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
H01J19/02—Electron-emitting electrodes; Cathodes
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J2893/00—Discharge tubes and lamps
H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
Landscapes
Solid Thermionic Cathode
(AREA)
Abstract
251,971. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. May 11, 1925, [Convention date]. Vacuum tubes. - A thermionic valve has a cathode, one or more anodes, arranged substantially in planes normal to the axis of a re-entrant tube 1 from which they are supported, and so that this tube is screened from the cathode. As shown, the anode 3 consists of two sheets bent to form flanged edges which are secured together and to supports 4, 5. The grid is a flattened helix wound over two rods 8, 9 carried by supports 10, 11. An N-shaped cathode filament 13, which may be oxide-coated, is mounted on leading-in wires and on two intermediate springy wires.
GB11091/26A1925-05-111926-04-27Improvements in or relating to electron discharge tubes or thermionic valves
ExpiredGB251971A
(en)