Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 180
Figure 167- — Wiring Diagram of a Three Station Telegraph System. STREET CAR CIRCUIT-BREAKER 169 … Figure 1i 8. — Wiring Diagram ofElectric Clock. and a sounder. The relay closes the local circuit; and thebattery sends a current through the sounder, making it click. Note that the current inthe main line never goesthrough the sounder. 203. The Electric Clock.— Very often it is desiredto have…
Physics
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