Air brake text for engineers and firemen;. ^—B6 ber F by supply valve piston 54, is connected with passagei, and thus with the brake pipe
Alamy Photo Prints and Wall Art
Air brake text for engineers and firemen;. ^—B6 ber F by supply valve piston 54, is connected with passagei, and thus with the brake pipe
Air brake text for engineers and firemen;. ^—B6 ber F by supply valve piston 54, is connected with passagei, and thus with the brake pipe, through passage c, c, port a andchamber G, above diaphragm 57. Regulating valve 59 is nor-mally held open by diaphragm 57 and regulating spring 6y, the 6o FEED VALVES. tension of which is adjusted by regulating nut 65, and when openchamber E is in communication with the brake pipe. When the handle of the brake valve is in running position, . PLATE 25. air pressure from the main reservoir in chamber F forces supplyvalve piston 54 forward, compressing itss. Air brake text for engineers and firemen;. ^—B6 ber F by supply valve piston 54, is connected with passagei, and thus with the brake pipe, through passage c, c, port a andchamber G, above diaphragm 57. Regulating valve 59 is nor-mally held open by diaphragm 57 and regulating spring 6y, the 6o FEED VALVES. tension of which is adjusted by regulating nut 65, and when openchamber E is in communication with the brake pipe. When the handle of the brake valve is in running position, . PLATE 25. air pressure from the main reservoir in chamber F forces supplyvalve piston 54 forward, compressing its spring 58, carryingsupply valve 55 with it and uncovering port b, thereby gainingentrance directly into the brake pipe through passage i, i. Theresulting increase of pressure in the brake pipe and in chamber G FEED VALVES. 6i above diaphragm 57 continues until it becomes sufficient to over-come the tension of regulating spring 67, adjusted at seventypounds. Diaphragm 57 then allows regulating valve 59 to beseated by spring 60, thus closing port a, and cutting off all com-munication between chamber E and the brake pipe. The pressuresin chambers F and E then become equalized, through leakage pastsupply valve piston 54, and supply valve piston spring 58, whichis compressed by the relatively high pressure in chamber F, nowreacts and forces supply valve 55 to its normal position, closingport b and cutting off communication between the main reservoirand the brake pipe. A subsequ
Media ID 39900396
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Bookcentury1900 Bookdecade1900
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