through which the current is taken from the alternat ing current machine. The resistance is gradually re moved as the motor gets up speed just as the starting resistance of the continuous-current 'motor and is en tirely cut out when the motor is in synchronism. It is possible for sParkine to take place at the contact be tween these rings and the conductors but the chance is never so great as with the continuous-current motor, scientific american, 1900-09-22
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