Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1264
Fig. Fig. 5 51 Fig. 550 pedestal panel for main and equalizer switches small capacity Fig. 551 main and equalizer switches for large capacity If this were not done the fields would act like a kicking,or spark coil and their insulation be damaged. In Fig. 556 is seen the diagram of the panel shown… … Fig. 552bear view of fig. 551 3230 Steam Engineering
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