Fig. 219.
Fig. 220.
[Fig. 217], on page 247, shows a four-pole generator designed to run by a belt or directly connected to an engine. The five parts named, as the principal parts of a dynamo, are all shown in the figure. The machine is arranged ready to be bolted to the floor.
[Fig. 219] on the opposite page is the armature which is made up of coils of insulated wire, the free ends of which, [see Fig. 220], are united to the arms of the commutator bars. When the armature is finished, as shown, the wire forms an unbroken circuit.
Fig. 221.