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H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
H02J7/16—Regulation of the charging current or voltage by variation of field
H02J7/18—Regulation of the charging current or voltage by variation of field due to variation of ohmic resistance in field circuit, using resistance switching in or out of circuit step by step
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FR335486D1903-06-041903-06-04
Electric lighting system for railroad cars and others
ExpiredFR335486A
(en)