Locomotive appliances . ngineer. Alsotwo exhaust pipes are connected to this cock, oneextending over cab and exhausting directly into thefeed water in the tender, the other pipe extending tothe smoke box and live steam ports or steam branch pipes to the steam ports are provided withcheck valves. A check valve is also placed in thepipe leading to the smoke box. The three-way valve is for the purpose of conduct-ing exhaust steam into the feed water or otherwise atthe will of the engineer. When opened in oppositedirection, and the engine is working steam, theexhaust is conducted to the
Locomotive appliances . ngineer. Alsotwo exhaust pipes are connected to this cock, oneextending over cab and exhausting directly into thefeed water in the tender, the other pipe extending tothe smoke box and live steam ports or steam branch pipes to the steam ports are provided withcheck valves. A check valve is also placed in thepipe leading to the smoke box. The three-way valve is for the purpose of conduct-ing exhaust steam into the feed water or otherwise atthe will of the engineer. When opened in oppositedirection, and the engine is working steam, theexhaust is conducted to the stack, but when theengine is shut off, the exhaust is admitted to the twosteam chests and cylinders by the automatic openingof the checks in the two branch pipes. The check inthe pipe leading to the stack prevents smoke andcinders from being drawn into the cylinders when theengine is drifting. The live steam ports are provided with automaticdrip valves situated at the lowest point in cylinder 328 LOCOMOTIVE saddles for the purposeof draining condensa-tion when the engineis at rest. The small sectionalcuts shown above thelocomotive tender inthe accompanying en-graving clearly illus-trate the details of thecheck valves, dripvalves, etc., and theirlocation. Among the manyadvantages claimedfor this device are thefollowing: It is noiseless. Thisavoids the frighteningof teams or the annoy-ance to passengersaround stations. Itdoes not create a drafton the fire when theengine is at rest, asdoes the old method. This advantage re-sults in the saving offuel. It acts as a lubri-cator to the valves andcylinders when the en-gine is not workingsteam, i The exhaust LOCOMOTIVE APPLIANCES. 329 steam from air pump circulates through the steamchests and cylinders, keeping them at a uniformtemperature, not allowing them to chill in coldweather when engine is at rest, or overheating orcutting of cylinders while drifting down grade,due to the friction of the piston traveling to andfro.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
