Willoughby, George Alonzo, 1894- · Peoria, Ill. : Manual Arts Press · leaf 80
ended from one fixture to makepossible the operating of any or all of them (Fig. 49). Oneshould be certain that both the wall switch and the keyswitch in the socket are closed. A push-button switch isclosed when the white button is pushed in, and a key switch THE OPERATION OF ELECTRICAL LAMPS 75… … U Fig. 49. A common installation. The wall switch controls bothlamps, and the key switches control them individually. A diagram ofthe connections is given also. If the wall switch is disconnected, or if the connectionsto it are loose, it is possible that closing a door or jarring theswitch in any…
Electricity · Electrical engineering
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-402-253.webp)
