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
GB11318/55A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products IncfiledCriticalSylvania Electric Products Inc
Publication of GB768786ApublicationCriticalpatent/GB768786A/en
H01J21/36—Tubes with flat electrodes, e.g. disc electrode
Landscapes
Discharge Lamp
(AREA)
Vessels And Coating Films For Discharge Lamps
(AREA)
Abstract
An alloy consisting of 58 per cent iron, 36 per cent nickel, and 6 per cent chromium has an expansion coefficient comparing with such ceramics as alumina, steatite, and zircon, and it may therefore be suitably sealed to these in making discharge tube envelopes.
GB11318/55A1954-04-191955-04-19Improvements in and relating to planar type electron tubes
ExpiredGB768786A
(en)