Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 201
own in Fig. 18G THE ELECTBIC LIGHT. 96, breaks the contact by means of a conical stopper whichterminates the screw of the key, and. which, when separated fromthe two plates through which the current passes when the stopperis in contact with them, breaks the circuit at two points, and ona surface of…
Electrical engineering
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