Railway and Locomotive Engineering . irection indicated by thearrow on the crank circle, and steam ad-mitted at the port t follows the line ofarrows through the passage y in the innerpiston through the port t in the outerpiston to the right hand end of the box,thus pushing the piston to the left. At thesame time the port w is open to the ex-haust and steam is flowing to it from theleft hand end of the box through the porth in the outer piston and the port z in theinner. The port .v of the inner piston is alsoopen to the exhaust which is flowing toit through the port leading down there-from, as
Railway and Locomotive Engineering . irection indicated by thearrow on the crank circle, and steam ad-mitted at the port t follows the line ofarrows through the passage y in the innerpiston through the port t in the outerpiston to the right hand end of the box,thus pushing the piston to the left. At thesame time the port w is open to the ex-haust and steam is flowing to it from theleft hand end of the box through the porth in the outer piston and the port z in theinner. The port .v of the inner piston is alsoopen to the exhaust which is flowing toit through the port leading down there-from, as indicated by the arrow. Theport «, which serves the upper side of the inner piston has not yet opened, butdocs so, shortly after the crank has passedthe center. The crank is thus acted upon by twopistons moving at right angles to eachother, and in what is virtually a doubleScotch yoke, so that it will always start. The detail of the valve action of thisengine can be readily followed from thediagrams presented. In these the view is. .^IDF. ELEVATION 01^ ELVIN STOKERENGINE WITH COVER REMOVED taken from a direction opposite to thatused for the engine itself, so that thecrank B is represented as turning in thedirection of the curved arrow A. The various positions of the crank inthe diagrams are numbered from 1 to 16consecutively. The ports in the inner pistonarc lettered C, D, E and F. The port Cserves the top of the inner piston; D servesthe right hand side (as viewed in thediagram of the outer piston; E, the bottomof the inner piston and F the left handside of outer piston. In the dia-grams the space enclosed by the circle Gis the opening of the steam admission portin the box; the circle H is the crank circle,and the space between the circles / andA is the exhaust opening in the box. Thedouble cross-hatched portions of the portsin the inner piston represent the portionsof those ports that arc opened to the ad-mission or exhaust ports in the box. In position No. 1. the cran
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyork, bookyear19
