Dynamos and motors; a text book for colleges and technical schools (1911)
Franklin, William S. (William Suddards), 1863-1930, Esty, William, 1868-1928 · New York The Macmillan company · leaf 427
a lightning arrester. Fig-ure 307 shows a single-polemagnetic blowout direct-currentlightning arrester manufacturedby the General Electric Com-pany. This particular arresterhas two spark gaps in series.The main spark gap is betweenthe two wing-shaped pieces ofbrass and it lies between thepoles of… … Fig. 307. SWITCHBOARDS AND SWITCHBOARD APPLIANCES. 419 current which continues to flow across the two gaps of the arresterafter a lightning discharge is passed, quickly establishes itself in
Dynamos · Electric motors
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
