. American engineer and railroad journal . laced in position to describe this system fullyfor the benelit of your readers. Paui. Dickinson. Security Building, Chicago, April 22,1904. Bbodebtce & Bascom Rufe Company.—A new price list of power, steel and crucible steel switch ropes has 1 n received from this company. It is being distributed among railroad officials,and copies will be sent upon application to the offices of the company, 80S North Main street, ^t Louis, Mo. 200 AMERICAN ENGINEER AND RAILROAD JOURNAL. CYLINDER RELIEF AND VACUUM VALVE. This valve is made by the Star Brass Manufactur
. American engineer and railroad journal . laced in position to describe this system fullyfor the benelit of your readers. Paui. Dickinson. Security Building, Chicago, April 22,1904. Bbodebtce & Bascom Rufe Company.—A new price list of power, steel and crucible steel switch ropes has 1 n received from this company. It is being distributed among railroad officials,and copies will be sent upon application to the offices of the company, 80S North Main street, ^t Louis, Mo. 200 AMERICAN ENGINEER AND RAILROAD JOURNAL. CYLINDER RELIEF AND VACUUM VALVE. This valve is made by the Star Brass Manufacturing Com-pany, Boston, Mass. It is designed to relieve excess pressuredue to water in a locomotive cylinder and also to relieve thevacuum in drifting. No springs are used, the valve beingheld to its seat by the steam pressure. It is held away fromits seat by the vacuum created in the steam passages in drift-ing. The inlet A is connected to the steam port leading to thecylinder and gives a 3-in. opening. To the inlet B a %-in. nHi rfr. CYLINDER RELIEF AND VACUUM VALVE. pipe is connected, leading to the live steam chamber in thesteam chest. The vacuum forming in the passage when thethrottle is closed causes the atmospheric pressure to raise thevalve and when the throttle is open the piston holds the valveE closed, unless forced open by water from the cylinder. D isa large orifice for communication with the atmosphere. Theconnection C is for a drain plug or cock. It should be notedthat the area of the piston portion of the valve E is greaterthan that of the valve below it. This valve is designed special-ly for locomotives which are fitted with piston valves andalso for compounds. THE ALLFREE HUBBELL VALVE GEAR. This valve gear, which is being applied to a number of loco-motives, is advocated with a view of reducing cylinder conden-sation by reducing the radiating surfaces of steam ports, and bya special construction of the valves, cylinders and saddle whichis designed to protect
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
