Roper's catechism for steam engineers and electricians .. (1899)
Roper, Stephen. [from old catalog], Keller, Edwin R., [from old catalog] ed, Pike, Clayton W., [from old catalog] ed · Philadelphia, D. McKay · leaf 363
losed, current will flow from F to B,B to the contact point C, through the armatureE to D, from D through the magnet coil to A,and from A back through the closed push andbattery to F. Owing to the current, the electro-magnet pulls the armature E toward itself andthe hammer strikes the gong G; but… … STEAM ENGINEERS AND ELECTRICIANS. 343 away from it by the spring S. This movement,however, brings E and C into contact again, caus-ing the whole action to be repeated, and this con-tinues as long as the push-button is held down,provided the battery keeps up its strength. Q. What three styles of…
Steam engineering · Electrical engineering
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-electricengineer03inte-406-255.webp)