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Publication of FR880687ApublicationCriticalpatent/FR880687A/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
H05B39/105—Circuits providing for substitution of the light source in case of its failure with a spare lamp in the circuit, and a possibility of shunting a failed lamp
FR880687D1941-04-301941-04-30Dispositif d'éclairage électrique bilampe à allumage automatique
ExpiredFR880687A
(fr)