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H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
H02K13/10—Arrangements of brushes or commutators specially adapted for improving commutation
FR528390A1920-12-101920-12-10
Improvements in electric dynamo machines
ExpiredFR528390A
(en)