Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 412
e of a special type, resembling morethan anything one ordinary D-valve with-in another, and the number of ports in thecylinders were four each; Nos. 1 and 3 be-ing the usual distributing ports carryingsteam to each end of the cylinder, and Nos.2 and 4 being used alternately as steamand exhaust… … Fig. 1. Distributing Valve. 315 ELEVATORS an exhaust. These valves — one change and two distributing—were all three contained within one steam chest, and the pressureof the steam from the boiler w^as always on them, holding them totheir seats. The change valve, however, was the only one whichopened…
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
