细节
A demonstration electric motor
in lacquered brass and black enamell, the armature with axis driving twin 7¾in. diameter pully wheel, with twin vertical coils, suspended from a cross-beam on two pillars from the mahogany base with four adjustable feet - 14 1/8in. (36cm.) wide
in lacquered brass and black enamell, the armature with axis driving twin 7¾in. diameter pully wheel, with twin vertical coils, suspended from a cross-beam on two pillars from the mahogany base with four adjustable feet - 14 1/8in. (36cm.) wide