Locomotive engine running and management : a treatise on locomotive engines, showing their performance in running different kinds of trains with economy and dispatch; also directions regarding the care, management, and repairs of locomotives and all their connections (1888)
Sinclair, Angus, 1841-1919 · New York : J. Wiley · leaf 228
7.This extension of the valve is called outside lap, orsimply lap. The effect of lap is to close the steam-portbefore the piston reaches the end of the stroke, andthe point at which the steam-port is closed is known asthe point of cut-off. When the steam is cut off, andconfined within the cylinder,… … Quarter Size Fig. 7. When a slide-valve is actuated by an eccentric con-nected directly with the rocker-arm or valve-stem, thepoint of cut-off caused by the extent of lap, remainsthe same till a change is made on the valve, or on thethrow of the eccentric, unless an independent cut-offvalve be…
Locomotives
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