International Library of Technology · Scranton, International Textbook Co. · leaf 516
g. 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… … 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…
Electrical engineering
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