Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules (1908)
National correspondence school of railroading, Chicago. [from old catalog] · [Chicago] · leaf 110
Plate 22, Figure I HANCOCK.MGUMATIC BLOW-OFF VALVE BLOW-OFF VALVE. 99 … FIG. 2—PLATE 22.HANCOCK PNEUMATIC BLOW-OFF VALVE Lore ioo BLOW-OFF VALVE. main drum and blow-off cock is closed, which allows theair to return through the same pipe into which it enteredto the blow-off cock, and through vent port in the cut-outcock, to the atmosphere. The boiler pressure,…
Locomotives
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