Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 387
arious terms re-lating to valve action are plainly defined in the section on^^Definitions/^ and it is unnecessary to repeat them here.If the outside lap is increased admission will be later andcut off earlier^ and if it be desired to keep the lead thesame it will be necessary to move the eccentric… … These propositions refer mainly to engines of the singlevalve variety in which one valve controls the admission anddistribution of the steam for both ends of the cylinder.In engines of the four-valve type, having a separate steamand exhaust valve for each end of the cylinder, each in-dividual valve…