. Air brake text for engineers and firemen; . e properpoint, or if the nuts on the piston are loose. The defects men-tioned are the chief ones which cause pounding. THE EIGHT AND ONE-HALF-INCH CROSS-COMPOUND AIR COMPRESSOR. The building of more powerful locomotives with the abilityto handle the long trains now in daily service throughout thecountry, as well as the large brake cylinders required for heavyfreight and passenger cars of modern construction,* have in-creased the demand for compressed air to such an extent thatgreater pump capacity has become essential on many roadswhere service con
. Air brake text for engineers and firemen; . e properpoint, or if the nuts on the piston are loose. The defects men-tioned are the chief ones which cause pounding. THE EIGHT AND ONE-HALF-INCH CROSS-COMPOUND AIR COMPRESSOR. The building of more powerful locomotives with the abilityto handle the long trains now in daily service throughout thecountry, as well as the large brake cylinders required for heavyfreight and passenger cars of modern construction,* have in-creased the demand for compressed air to such an extent thatgreater pump capacity has become essential on many roadswhere service conditions are especially severe. To meet thisdemand an air compressor of the cross-compound type has beendeveloped. This type is not only of ample capacity for anyrailroad service, but in point of efficiency and economy in steam,consumption it is a decided improvement over the present 95^and ii-inch air pumps. Plate 8 shows a photographic view,and Plate 9, Figs, i and 2, shows diagrammatic views of theair compressor. 20 WESTINGHOUSE AIR
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