Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 670
discharge the pressure from the driver brakecylinders. Lap Position. (Fig. 274.) This position should beused in case a hose bursts, the train parts or a con-ductors valve is opened, to save the main reservoir pres- THE B2 BRAKE VALVE 641 sure. In this position all ports are blanked, exceptingport… … Fig. 275. First Graduating Position. Graduating Positions. (Figs 275 and 276.) Thesepositions give a gradtial reduction of brake pipe pres-sure for service applications. In Fig. 275 ports M are
Locomotives
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![An illustration from Catalogue des monuments et inscriptions de l'Égypte antique / publié sous les auspices de S.A. Abbas II Helmi par la direction générale du Service des antiquités [de l'Égypte] ; par J. de Morgan, U. Bouriant, G. Legrain, G. Jéquier, A. Barsanti (1894)](https://img.insideoutlibrary.com/img/200/ia-cataloguedesmonu21egyp-98-148.webp)
