Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 269
nd brass blocks Instruments for Testing 263 mounted on a hard rubber base form the terminals ofthe various resistance coils, as shown in Fi^re 164.Brass plugs inserted in the openings between theseblocks short circuit the resistance coils so that onlythose coils are in use on which the plugs are… … ,..^.^% Figure 165 the posts marked X. The battery circuit is normallyopen, being closed by the key B. The galvanometerkey is also normally open, being closed by the keymarked G. When this latter key is released it makescontact with the point shown above the key, this short-circuiting the…
Electrical engineering · Electric testing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-167-74.webp)
