r their operation, and a condenser across scales at an even hundredweight. The insulation be- The insulation throughout the coil consists of mica, the primary is of little or no service. the secondary coils all being exposed to the air. The tween the primary and secondary—naturally one of Larger… … The commutator forms part of the armature of the motor. The commutator is driven by the motor through step-down gearing. TWO FORMS OF INTERRUPTER FOR THE ENORMOUS INDUCTION COIL.
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