Electrical appliances of the present day; being a report on the Paris Electrical Exhibition of 1881 (1884)
Heap, D. P. (David Porter), b. 1843 · New York, D. Van Nostrand · leaf 244
241 tjie (>enter is a brass plate, C, to which the main cable is attached, and !}iieh overlaps the four plates n, so that it may be connected to them by thumb-screws. Should it become necessary to raise the junction-box at time for testing purposes, this commutator enables the electrical con- … Fig. 229. dition of the branch circuits to be ascertained separately, or any one to be disconnected from the main cable, by unscrewing the corresponding screw. Iti' of importance that the firing of torpedoes be controlled from the shore when practicable, so that they may be rendered safe for the…
International Electrical Congress, Paris, 1881
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