Ludy, Llewellyn V., 1875- [from old catalog], American Technical Society · Chicago, American technical society · leaf 152
right a distance equal to the outside lap plus the lead,it will be in the position shown in Fig. 47. Steam will be admittedat the extreme left edge of the valve just the same as though it werea plain slide valve; also, since steam surrounds the valve, it will beadmitted through the passage as shown… … Fig. 49. Obtaining Perfect Balance by Use of Double-Ported Piston Valve and Double-Ported Slide Valve in Compound Engine Fig. 48 shows the valve when it is in extreme position to theright and the port is full open to steam. Piston valves are also made with a passage similar to that ofthe trick…
Indicators for steam-engines · Steam-engines
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