Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives (1916)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co., pub. for Sears, Roebuck & co. · leaf 162
1. How may the minimum port opening amminimum valve travel be found? j : ! CHAPTER VIPISTON VALVES AND BALANCED VALVES Hitherto the plain D slide valve alone has been con-sidered in the discussion of the subject of valves andfalve setting. There are, however, many other types of valves in(ise on… … Figure 69 The principal objection to the use of the D slidefalve is the large amount of friction caused by theaction of the steam pressing the valve against its seat,and inventors have racked their brains for many yearsn efforts to produce a valve that would work withoutfriction, and at the same…
Locomotives
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