[Electric engineering.] . Fig. 29. 52 ELECTRIC LIGHTING. 19 fully drawn out, so that the circuit is not interrupted. Thetubular supports n, shown in Fig. 30 (c), are of insulatingmaterial, and the plugs pass through them to make contactwith the vertical strips. It will be noticed that there arethree breaks in each vertical strip between a dynamo termi-nal and a corresponding circuit terminal. These breaks areat /, /, /. When, therefore, these breaks are plugged across,as indicated by the three rows of plugs in Fig. 30 (a),. J^ Ito B=3 ttO Fig. 30. dynamo A is operating circuit 1-; dynamo B, ci
[Electric engineering.] . Fig. 29. 52 ELECTRIC LIGHTING. 19 fully drawn out, so that the circuit is not interrupted. Thetubular supports n, shown in Fig. 30 (c), are of insulatingmaterial, and the plugs pass through them to make contactwith the vertical strips. It will be noticed that there arethree breaks in each vertical strip between a dynamo termi-nal and a corresponding circuit terminal. These breaks areat /, /, /. When, therefore, these breaks are plugged across,as indicated by the three rows of plugs in Fig. 30 (a),. J^ Ito B=3 ttO Fig. 30. dynamo A is operating circuit 1-; dynamo B, circuit 2;dynamo C, circuit 3. This will be apparent by referring toFig. 31. The vertical lines here represent the vertical bars,in which the breaks are indicated by open spaces. Theblack circles represent the plugs, and are supposed to con-nect the two terminals between which they are 30 represents the ordinary condition of running, andit will be noticed that the cross-bars are not in use.
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