Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 921
eering guide and piston^ while the pot B rises and falls^ andby so doing draws air into tlie chamber C through thepassage D^ the vacuum C being regulated by the positionof the needle valve E. As the pot falls^ air escapes fromC through valve H^ and the fall is free until the lowerend of the pot… … Fig. 373section of the dashpot Double-pipe Ammonia Condenser. This type of con-denser consists of two series of coils^ one within the other,and is usually built in four different forms having 2-inchand 1.25-inch^ 2.5-inch^ 3-inch and 2-inch pipes or,having the upper outside pipes 2.5 inches and…
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-287-208.webp)
