Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 195
t, or spindle springs may be fixed to bear upon rings uponthe interior of an insulated cylinder or pivot receptacle, or onering and one spring may be used, a single conductor passingthrough the bracket, the metal of the bracket and system ofpipes being used for the other conductor ; but sucli… … Figs. 93 and 94. it may be preferable to have it at the lamp itseli In such, casea projecting key or circuit controller would be in danger of acci-dental displacement or breakage. In this arrangement a circuit controller is provided, whichhas no projecting parts, and in which all the electrical…
Electrical engineering
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