Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 196
f insula-ting material hollowed out from the top, and provided at itsbase with means for its attachment to a pipe, bracket or chande-lier arm. Upon the interior of the socket are two metal rings,forming terminals of the conductors, leading through the pipeor otherwise to the socket. Upon the neck… … Fig. 95. placed therein, so that the circuit is completed, except as modi-fied by tlie circuit controller, by the act of placing the lamp inits socket. The conductor leading to one of the rings of thesocket is interrupted or broken, the conductor leading to a pinupon the exterior of the socket,…
Electrical engineering
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