F. H. Richardson's bluebook of projection (1935)

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14 RICHARDSON'S BLUEBOOK OF PROJECTION the commutator consists of as many copper bars or segments as there are coils like AB in the armature. (32) In practice all coils are interconnected with each other through the commutator segments. Failure to understand that there can be any connection between positive and negative brushes located at opposite sides of the commutator bars may puzzle the student. Just remember there is an interconnection, and the current generated by each coil will seek its own coil again after having passed through the external circuit. Figure 3 The Generator We use the term "dynamo," though properly that term is only applied to machines producing direct current, those producing alternating current being known as "alternators." (33) Fig. 3 shows various integral .parts of what is