Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 205
m-ports. The distance which the hollowlacks to enable it to meet the inner edge of the port is calledexhaust-clearance or inside clearance. Its use is restricted tohigh-speed engines and to those in which the expansion bymeans of lap is not carried very far. The difificulty would befrom the too… … Fig. 131. 90. Lead in the Slide-valve—It is often considereddesirable to have the valve partly open before the pistonreaches its dead-centre, in order to bring full boiler-pressureon the piston at the beginning of its stroke. In other words,to have the valve lead the piston. The definition of lead…
Mechanical engineering · Steam power plants
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