Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 407
l circuit. The Westinghouse Electric and Mfg. Co. and others use, where required,what is called an economy coil, which is something like a small trans-former placed across the terminals of a 100-volt a.c. circuit. Three a.c. arc lamps can be connected to the terminals of this coil and ifone lamp… … Fig. 5. The Inclosed Arc lamp is the only radical change in arc lamppractice during a number of years past, and is now being used for a greatpart of all new work installed. It has been found that by inclosing the tips of the carbons in a smallreceptacle more or less approaching air-tight…
Electrical engineering
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