Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U.S. seacoast defenses (1902)
United States. War Dept, Anderson, George Lucius, 1849-1934 · Washington, Govt. Print. Off. · leaf 150
es on the back for the lineand the lantern cables. The mechanism consists of a central rotating stud witheight contacts which rest against eight semicirciTlar plates. Each plate is madeup of insulating sections of hard rubber and metal sections which connect witha lamp in one of the lanterns.… … 138. Mechanism of Keyboard. the position on the dial corresponding to the desired signal, some contacts reston the hard rubber sections and others on the metal sections, thus connectinginto circuit a certain combination of lamps. The lamps are not actually lighted,however, until the knife switch on…
Electric machinery · Searchlights · Coast defenses
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
