. A textbook on the locomotive and the air brake . brake valve,and may be removed before starting the pump, for the purposeof dropping a little oil on the seat of valve 114- to lubricate itand make handle 123 work easily. 59. Figs. 16, 17, and 18 are external views of the rear endand the two sides, respectively, of the engineers brake projection W and nut 98 enclose the excess-pressurevalve 97, shown in Fig. 19. Fig. 19 is a cross-section (rear view) taken through the feed-valve on the line a, h, Fig. 23. The cap nut 98 is made longand hollow to receive excess-pressure spring 90. The
. A textbook on the locomotive and the air brake . brake valve,and may be removed before starting the pump, for the purposeof dropping a little oil on the seat of valve 114- to lubricate itand make handle 123 work easily. 59. Figs. 16, 17, and 18 are external views of the rear endand the two sides, respectively, of the engineers brake projection W and nut 98 enclose the excess-pressurevalve 97, shown in Fig. 19. Fig. 19 is a cross-section (rear view) taken through the feed-valve on the line a, h, Fig. 23. The cap nut 98 is made longand hollow to receive excess-pressure spring 90. The feed-valve is made very much like a steam pop safety valve, and hasa projection on it to increase the area or surface for the air topress against when it is raised from its seat. The effect of thisincrease of area is to cause the valve to lift higher, and thussupply the train pipe faster. Fig. 20 is a section through the side, showing the travel ofslide valve II4. and the way in which cut-off valve 110 is con-trolled by piston I04 and lever To Main §15 THE NEW YORK AIR BRAKE. 37 Fig. 21 is a cross-section through the brake valve on the Hnee/, Fig. 23, and is a front view. Fig. 22 is a cross-section taken on the line c cl, Fig. 23 shows the valve seat and the arrangement of the 24 shows the face of main slide valve 11^.Fig. 25 shows the small supplementary reservoir. 60. Referring to Figs. 17 and 18, we have the positions ofthe handles (five in all) shown on the quadrant I24. Whenthe handle is in the position marked F«W Release,^ the slidevalve 114 is at the extreme forward point of its travel, andchamber B, containing air at main-reservoir pressure, is placedin full and direct communication with chamber A and the trainpipe, as shown in Fig. 26. While in this position, air atmain-reservoir pressure feeds into the train pipe freely, andquickly raises the train-pipe pressure. Also, chamber D andthe supplementary reservoir are relieved of all pres
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
