Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U. S. seacoast defenses .. (1904)
United States. War Dept · Washington, Govt. print. off. · leaf 153
t box containing the mechanism for connecting he lamps mvarL c^omWtions. xhe keyboard is illuminated by ^--^^^J^^^j^^l^^^ e h conta tsSc^^^ eight semicircular plates. Each plate is inade up of insu aing sections ofliard rubber and metal sections ^^hu^h comie t xythn laimiin one of the lanterns.… … 138. Mechanism of Keyboard. the position on the dial corresponding to the desired signal, some contacts reston trSnibber sections and others on the metal tectums thus connoj^^^^^^^^^nto circuit a certain combination of lamps. The lamps are ^^^^^^^^^^however, until the knife switch on the rotating…
Electric machinery · Searchlights · Coast defenses
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