. Railway age gazette . Be^creRiveting. Hollow Main Crank Pin Afhr piston valve was then developed and, with only one change inover all length, it now fits locomotives of 14 different classes onthis road. The main valve on this locomotive weighs but 118 head, or followers, are of drop forged steel, while the spool,or main body of the valve, is made of a piece of seamless tubing,the ends being solid or flanged pieces of boiler steel and the partsjoined by electric welding. It has snap rings of Z section andan inside lip, or flange, is arranged to prevent the displacement ofparts of the r
. Railway age gazette . Be^creRiveting. Hollow Main Crank Pin Afhr piston valve was then developed and, with only one change inover all length, it now fits locomotives of 14 different classes onthis road. The main valve on this locomotive weighs but 118 head, or followers, are of drop forged steel, while the spool,or main body of the valve, is made of a piece of seamless tubing,the ends being solid or flanged pieces of boiler steel and the partsjoined by electric welding. It has snap rings of Z section andan inside lip, or flange, is arranged to prevent the displacement ofparts of the ring in case of a breakage. It will be seen thatthe valve stem crosshead is carried in a guide that forms partof the back steam chest head Possibly one of the most interesting details of the locomotives. J TaperBolf- Section of Screw Reverse Gear is the piston rod. This is of the extension type, and is of hol-low, heat-treated steel. Much ingenuity was shown in workingout the method of producing this unusual form of rod. Oneof the illustrations shows the rough forging which is drilledfor its entire length of over 8J4 ft The ends of the rod and the piston fit are then pressed downto the smaller diameter in a hydraulic forging press, as is shownin the second illustration. A photograph of a section of thefinished rod is impressive evidence of its lightness and strength. RAILWAY AGE GAZETTE, MECHANICAL EDITION I Vol. 88, No. 2
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
