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FR DE LAMPES A INCANDESCENCE L
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FR DE LAMPES A INCANDESCENCE L
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Application filed by FR DE LAMPES A INCANDESCENCE LfiledCriticalFR DE LAMPES A INCANDESCENCE L
Publication of GB267078ApublicationCriticalpatent/GB267078A/en
H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
H01J1/02—Main electrodes
H01J1/13—Solid thermionic cathodes
H01J1/15—Cathodes heated directly by an electric current
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Measuring Fluid Pressure
(AREA)
GB19562/26A1926-03-021926-08-07Improvements in or relating to thermionic valves
ExpiredGB267078A
(en)
Improvements in and relating to electric incandescent lamps and other electric apparatus in which an incandescent filament requires to be kept stretched