. Locomotive engineering : a practical journal of railway motive power and rolling stock . eare two valves, A and B, on the samestem of which the upper valve A, has agreater area than the lower valve, B, andhas holes through it near its peripherycovered by a disk a, pressed against itsback by a spring. The second chambercommunicates, by a side passage G, withthe brake-cylinder, and the third chamberhas an opening H to the third chamber contains the thirdvalve C, also on the same stem, which canclose upward against a caoutchouc orleather seating c when the valve A isclosed again
. Locomotive engineering : a practical journal of railway motive power and rolling stock . eare two valves, A and B, on the samestem of which the upper valve A, has agreater area than the lower valve, B, andhas holes through it near its peripherycovered by a disk a, pressed against itsback by a spring. The second chambercommunicates, by a side passage G, withthe brake-cylinder, and the third chamberhas an opening H to the third chamber contains the thirdvalve C, also on the same stem, which canclose upward against a caoutchouc orleather seating c when the valve A isclosed against its upper seat. Theseating c is made with a little spacebetween its inner edge and the bodyof the valve-box, so that when thevalve C bear against it the pressure of airabove the seating shall press it againstthe raised annular edge of the valve C,and thereby insure the tightness of itsclosure. The operation of these valves is asfollows: Assuming that the auxiliaryreservoir is not charged with compressedair, when compressed air is admitted intothe air-pipe it enters by the passage E,. KFig. 3 ■s - Fig. 2
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Keywords: ., bookcentury1800, bookdecade1890, bookidlocomotiveen, bookyear1892
