Locomotive operation; a technical and practical analysis (1904)
Henderson, G. R. (George R.), b. 1861 · Chicago, Railway Age · leaf 109
al ports have beenadded to each type of valve, for the purpose of overcoming theslow movement of the valve at admission and cut-ofif referredto in connection with Fig. 25. Most of these improvementsare on the basis of the Allen valve, which gives a double open-ing of the port when it is most… … Fig. 26. Fig. 2(i shows a section of the ordinary flat valve and thecontrolled ports, and Fig. 27 the same for a piston valve havingthe same steam controlling elements. Fig. 28 illustrates apiston valve with inside admission. As the Stephenson linkmotion can be constructed with quite accurate…
Locomotives
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