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 132
.—The lamp may be lifted by the top plate,but it should never be lifted by the carbon supports, as the strain due to itsweight is liable to spring them out of their correct position. The 18-inch and24-inch projectors have obturators which prevent carboning the lamps beforethey are placed in the… … 125. Obturator. shutters of the obturator should be opened and the arc magnet turned so thatthe opening is downward. This adjustment may be made after removing thepin on the side. The lamp may now be placed in the i^rojector, the arc magnetreturned to its proper position, and the shutter of the…
Electric machinery · Searchlights · Coast defenses
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