. Railway mechanical engineer . e applied load curves. Fora load of 20,000 lb. the difl^erence in deflection between thespring in its original condition and when reset without oil andgraphite between the plates is .27 in., or per cent. Withoil and grajjbite between the plates a further increase in de-flection of .14 in., (jr 7 per cent was obtained. The total increasein deflection ilue to resetting and lubricating the plates was .41in. or per cent. The uniformity of the release load curvesfor wide variations in spring conditions is shown in Fig. 6. [Editors Note.—The remainder of Par
. Railway mechanical engineer . e applied load curves. Fora load of 20,000 lb. the difl^erence in deflection between thespring in its original condition and when reset without oil andgraphite between the plates is .27 in., or per cent. Withoil and grajjbite between the plates a further increase in de-flection of .14 in., (jr 7 per cent was obtained. The total increasein deflection ilue to resetting and lubricating the plates was .41in. or per cent. The uniformity of the release load curvesfor wide variations in spring conditions is shown in Fig. 6. [Editors Note.—The remainder of Part I will be published inan early issue.] RECIPROCATING AND REVOLVINGPARTS BY H. A. F. CAMPBELL* 1 (Concluded).Tlie valve motion parts of these Pennsylvania locomotivesare shown in Figs. 14, 15, 16 and 17. It is not the intention todiscuss each part in detail. Looking at the illustrations, theseparts seem startlingly light. Every detail towards weight reduc-tion has been carefully considered. Starting right with the pis-. «>«> \/l\B\c\D\£\Fa\ Mhnfkand Ihcj/^ 9 \3i,\i%4i\-ri l^\z% rr,kodo 10 4;7*^,4/z|!?l Drop Forging. Stchon X-X Fig. 14—Valve Stem Crosshead of Pennsylvania Locomotive ton valve, the valve rod and valve rod crosshead, which are themain inertia parts, the weight has been greatly reduced overordinary practice. -\ll these parts may seem light, but assome of the principal stresses in them are caused by the inertia■ Locomotive Works, Philadelphia, Pa. 164 RAILWAY AGE GAZETTE, MECHANICAL EDITION ^oL. 89, No. 4 I I ,« Me/d
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
