International Library of Technology · Scranton, International Textbook Co. · leaf 469
n whatposition k may be, one end of it is bound to make contactwith a trolley post. When k is in the position shown in thefigure, the current comes in at Z^, goes over to Z^ by way ofthe inside connection, crosses /t, and goes out on the L^ wire.If k is given a quarter-turn, the current comes in on… … Fig. 48. 44. WestingliGiise Plug STvitcli.—Fig. 49 shows theWestinghouse Companys three-way plug switch. A \?, z.disk of hard rubber about 3|- inches in diameter and about1^ inches thick. In it are three metal-lined holes Z, i, ^,each with a metal bottom. By means of posts not shownin the figure,…
Electrical engineering
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