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
GB18613/29A
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 GB315699ApublicationCriticalpatent/GB315699A/en
Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like
(AREA)
Furnace Details
(AREA)
Abstract
315,699. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. July 16, 1928, [Convention date]. Vacuum tubes; low - pressure metallic-vapour apparatus.-In discharge tubes operated at a high temperature for the emission of positivecolumn light and having a wall comprising a part 1 of transparent material of high melting point which is sealed to one or more enlarged parts 2, 3 consisting of a material of comparatively low melting point, the seal is situated in the enlarged part of the tube wall, as at 10. In the case of a graded seal 11 at least one of the seals is situated in the enlarged part. The part 1 may be of quartz for the emission of ultraviolet radiation. Specification 307,982 is referred to.
GB18613/29A1928-07-161929-06-17Improvements in or relating to electric discharge tubes
ExpiredGB315699A
(en)