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
GB15527/29A
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.)
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
Publication of GB312273ApublicationCriticalpatent/GB312273A/en
H01K1/04—Incandescent bodies characterised by the material thereof
H01K1/10—Bodies of metal or carbon combined with other substance
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01K—ELECTRIC INCANDESCENT LAMPS
H01K1/00—Details
H01K1/50—Selection of substances for gas fillings; Specified pressure thereof
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Decoration By Transfer Pictures
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Crystals, And After-Treatments Of Crystals
(AREA)
Heat Treatment Of Articles
(AREA)
Abstract
312,273. General Electric Co., Ltd., (Assignees of Patent-Treuhand-Ges. fiir Elektrische Gl³hlampen). May 23, 1928, [Convention date]. Arc-lamp electrodes consist of hafnium carbide. They are preferably formed in the first place of metallic hafnium and then converted to the carbide by heating in an atmosphere containing carbon, e.g. a mixture of hydrogen, nitrogen and acetylene.
GB15527/29A1928-05-231929-05-17Improvements in or relating to electric lamps
ExpiredGB312273A
(en)