Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 127
me to escape before the pis-ton commences the return stroke. Fourth, it mustnot permit live steam to enter the exhaust port directfrom the steam chest. Fifth, it must close each steamport on the steam side before it is opened on tht^ I2C LOCOMOTIVE ENGINEERING exhaust side; this is for the purpose… … FlGUEE 53 ihows the valve in its central position and explainsthe meaning of the word lap. Outside lap, oftenreferred to as steam lap, is the distance that the edgeof the valve overlaps the steam ports when it standscentral or at mid-travel, and is that portion of the Figure 54 valve marked L and…
Locomotives
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