. American engineer and railroad journal . Slow-Closing Tank Outlet Valve. This works in a cylinder in which four holes are drilled. Thesmall cylinder fills with water and the holes offer sufficient re-sistance to the motion of the piston to retard its closing. In thesmall piston a check valve is provided which admits water toaid in the fliiu upward movement of the piston. The valve. Slow-Closing Attachment for Tank Valves-stem, which is of gas pipe, is perforated for the purpose ofadmitting air to the pipe below the valve in order to destroythe vacuum which would otherwise form after the clos
. American engineer and railroad journal . Slow-Closing Tank Outlet Valve. This works in a cylinder in which four holes are drilled. Thesmall cylinder fills with water and the holes offer sufficient re-sistance to the motion of the piston to retard its closing. In thesmall piston a check valve is provided which admits water toaid in the fliiu upward movement of the piston. The valve. Slow-Closing Attachment for Tank Valves-stem, which is of gas pipe, is perforated for the purpose ofadmitting air to the pipe below the valve in order to destroythe vacuum which would otherwise form after the closure ofthe valve. The dash pot shown on top of the ordinary tankvalve in the other engraving is applied for the samepurpose as the small piston shown in the sectional drawingof the new valve. This dash pot is 3% ins. in diameter andthe necessary resistance is secured through %-in. holes. Thisdash pot is connected to the main valve lever by the two linksalso shown in the engraving. PHYSICAL TREATMENT OF STEEL FOR RAILS. Much has been said regarding the chemical and physicaltreatment 0*4 steel while being rolled into rails, but not untilrecently has the physical treatment been given due considera-tion by the modern rolling mills, in the matter of finishingits products at a reduced temperature. It is generally concededthat old rails after being rerolled wear better than when puti
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
