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Expired
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GB32828/25A
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Individual
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Individual
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Publication of GB246453ApublicationCriticalpatent/GB246453A/en
H01J61/32—Special longitudinal shape, e.g. for advertising purposes
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Discharge Lamp
(AREA)
Abstract
246,453. Claude, G. Jan. 22, 192;!, [Convention date]. Low-pressure metallic-vapour apparatus.-The bore of a lighting tube containing neon and mercury vapour is vaned alternately, either by shaping the tube or by fitting therein thick-walled pieces of tube so as to provide portions of large and small bore. The portions of large bore emit blue light and those of small bore, red light.
GB32828/25A1925-01-221925-12-29Improved manufacture of electric discharge tubes
ExpiredGB246453A
(en)