. American engineer and railroad journal . RAILROAD JOURNAL. PISTON VALVES WITH ALLEN PORTS. Objection has been made against piston valves becauseof the difficulties in applying to them the principle of theAllen poit. The design illustrated was prepared by Mr. Muchnick, of the Compagnie de Fives-Lille, France, to suitthe dimensions of locomotives of the line inChina, to meet this objection. Mr. Muchnick, believing thatit is not at all improbable that the same objection has been piston valves are used, are made considerably larger thanwith slide valves, it may be supposed
. American engineer and railroad journal . RAILROAD JOURNAL. PISTON VALVES WITH ALLEN PORTS. Objection has been made against piston valves becauseof the difficulties in applying to them the principle of theAllen poit. The design illustrated was prepared by Mr. Muchnick, of the Compagnie de Fives-Lille, France, to suitthe dimensions of locomotives of the line inChina, to meet this objection. Mr. Muchnick, believing thatit is not at all improbable that the same objection has been piston valves are used, are made considerably larger thanwith slide valves, it may be supposed that the greater backpressure due to insufficient exhaust opening in the latter toexhaust the greater amount of steam admitted into the cylin-der on account of the double port opening cannot occur whenthe Allen principle is applied to the piston valve. The plan shown takes live steam at the center of the valvelike the piston valves in use on the Norfolk & Western Ry. The increase of power of the engine due to the improved r^-:7^/77:W. V/\//mM^///^/MW//////,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
