A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 457
Fig. 47S The Brush Regulator. This resistance may be adjusted either auto-matically by an electro-magnet whose coils arein an independent shunt across the mains, or maybe operated by hand. In Fig. 476, the variable resistance is shownat R, the lever switch being in this case operatedby hand…
Electricity · Electrical engineering
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