. The railroad and engineering journal . requirements, protecting the stokers perfectly, and beingat the same time free from all danger of giving false indica-tions. As will be seen, there is a valve both in the steam andin the water arm, and both these valves come to the seat incase of accident. The lower ball valve A is made so heavythat it cannot be held up against its seat by the pressureof the column of water in the boiler, and consequentlythere is no danger of the wafer being trapped in the glassand kept there to give a false indication. Further, the ballis of such a weight that it will
. The railroad and engineering journal . requirements, protecting the stokers perfectly, and beingat the same time free from all danger of giving false indica-tions. As will be seen, there is a valve both in the steam andin the water arm, and both these valves come to the seat incase of accident. The lower ball valve A is made so heavythat it cannot be held up against its seat by the pressureof the column of water in the boiler, and consequentlythere is no danger of the wafer being trapped in the glassand kept there to give a false indication. Further, the ballis of such a weight that it will not be carried up by the PROFILE OF THE VlfeOEZERMATT RAILROAD. try. The reason is, however, not far to seek. From. rolling of a vessel or the shaking of a locomotive. Theball B in the steam arm rests over the upper end of thesupplemental tube C, as shown, except when it is forcedforward against its seat, as shown in dotted lines. It alsois safe from dislodgment by shaking. When a glass breaks the water pressure in the lowerarm throws the valve A against its seat and stops all es-cape at the lower end of the glass. At the same time therush of water up the supplemental tube Clifts the valveB. This is then forced against its seat by the steam, andthus all escape is cut off instantaneously and certainly. Anew glass can then be fitted with safety. Upon closingthe cocks and removing the clearing screw L) in front ofthe bottom arm, and a similar screw in that of the toparm, the valves will roll out of the gauge. We are sure that our readers will recognize the meritsof this gauge, and that those who are responsible for thesafety of stokers will give it further consideration. Vi^ge, where the Zermatt Valle
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
