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
GB1900920A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLCfiledCriticalGeneral Electric Co PLC
Priority to GB1900920ApriorityCriticalpatent/GB169546A/en
Publication of GB169546ApublicationCriticalpatent/GB169546A/en
H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
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
H01J2893/0012—Constructional arrangements
H01J2893/0019—Chemical composition and manufacture
H01J2893/002—Chemical composition and manufacture chemical
Landscapes
Lasers
(AREA)
Discharge Lamp
(AREA)
Abstract
169,546. General Electric Co., Ltd., and Thompson, M. July 6, 1920. Vacuum tubes.-An electrode or a part thereof, made of tungsten or other metal, particularly a thoriated tungsten filament, is coated with a varnish, which, on baking, and during exhaustion of the device, makes a definite change in the surface of the metal, so as to prevent evolution of gases. The varnish may consist of celluloidamylacetate paste, thinned out with a mixture of ether and methyl alcohol, and may contain red phosphorus.
GB1900920A1920-07-061920-07-06Improvements in or relating to electron discharge devices
ExpiredGB169546A
(en)