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Harper's Encyclopedia of United States History (ed. Benson Lossing) 6 0 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Horseshoe Bend (Alabama, United States) or search for Horseshoe Bend (Alabama, United States) in all documents.

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Knight's Mechanical Encyclopedia (ed. Knight), B. (search)
ot to interfere with the ordinary operation of the brakes by hand. For ordinary passenger-trains, an air-pressure is commonly required of from 30 to 60 pounds per square inch. The capability of this brake is best shown by the following report of tests made. At a test on the Kansas Pacific Railway, May 12, 1871, a train going at the rate of 45 miles an hour was stopped within a distance of 250 feet. On September 18, 1869, a test was made on the Pennsylvania Railroad, at the famous Horseshoe bend. The train of six cars, running down a grade of 96 feet to the mile, at the rate of 30 miles an hour, was brought to a stand-still in 420 feet, — seven carlengths. The steam-ejector has also been employed by Mr. Westinghouse, under a patent granted to him in 1871, for exhausting the air from the brake-cylinders in front of the pistons, and thus applying the brakes by a vacuum or atmospheric pressure. See Giffard injector. 2. (Machinery.) A friction strap or band applied on the