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Publication of FR497306ApublicationCriticalpatent/FR497306A/fr
H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
H05B39/10—Circuits providing for substitution of the light source in case of its failure
FR497306D1918-04-111918-04-11Dispositif de protection pour lampes à incandescence spécialement applicables aux phares de véhicules
ExpiredFR497306A
(fr)