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 351
Figs. 6 and 7. Natural Draft Transformer — Showing Case Removed. coils are built up high and thin, and assembled with spaces between them,the air being forced through these spaces. The iron core is also built upof numerous openings through which the air is forced for cooling pur-poses. This style…
Electrical engineering
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