Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 244
oyedas a rule withsmall motors, sayup to 20 or 30hp, and even thenis but rarely re-sorted to. Thechanges practic-ally possible areTery few (gene-rally nothingmore than in theratio of 1:2 isattempted), and in-termediate speedsare not obtained,which considerablylimits the useful-ness of the… … Fig. 1.—Quick-breakSwitch Fig. 2.—Switch withoutQuick-break Feature Almost all modern switches are of some quick-break type, but formerly switches withoutthis feature were also widely employed. Twoordinary hand-operated lever switches, theone without and the other with the quick-break feature, are…
Electrical engineering
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