Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 285
Fig. 138. Fig. 139. Fig. 140. bent into hooks for engagement with other hooks forming theterminals of the circuit wires, the lamp being pressed downward,so as to bring the hooks into engagement by the spiral springinto which its neck is inserted. The lamp connection is shown in Fig. 139, and is…
Electrical engineering
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