Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 375
moved in theopposite direction by the Unk motion connected to the piston rod, uncovers the small steam portwhich admits steam back of the piston a, which in turn operates the main valve h. Themovement of the main valve uncovers the steam port connected with the end of the cylindertoward which the… … Discharge
Building · Heating · Ventilation
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.