Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 637
etween the twopistons, the stem of the vent piston strikes the rubber LOCOMOTIVE ENGINEERING -7-=/, 3/3 Exhaust seated vent valve and drives it trom its seat. Thisallows trainpipe pressure to pass into passage H, andthereby forces the emergency piston 137 forward,which action not only opens port J… … QT 138 chamber K by^■^^ the rubber-seated valveinto chamberL and unseatthe non-returncheck valve117, therebycausing theauxiliary reser-V o i r pressureto quicklyequalize with the brake cylinder pressure. Whenthe trainpipe pressure has reduced below the aux-iliary reservoir pressure, the emergency…
Locomotives
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