Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 403
open-ing can be readilychanged while understeam by screwingthe threaded bolt atthe top of the cyl-inder up for dimin-ishing, or down forincreasing, the pres-sure. The seats of thisvalve are flat, anddo not cut or wearout and leak so read-ily as beveled seats.The valve is made ofthe best gun metal.… … Figure 186Crosby Locomotive Pop SafetyValve INJECTORS, ^r:AM GAUGES, ETC. 397 secure the head-bolt in this position by means of thelock-nut; for regulating the loss of escaping steam,turn the screw ring G up for increasing, or down fordecreasing it. Caiitio7i. Care should be taken that no red lead,
Locomotives
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