. The Locomotive. he may giveinstructions to the mechanic he employs. Even with skilled handsto do the work the owner will naturally have some interest in thereasons for the steps that are taken. The more usual construction that is found in this type of cross-head and piston rod joint is the one in which the end of the rod istapered, although the straight cylindrical end is sometimes used. Thesetwo variations in the general construction are illustrated in Figs. Iand 2. The end of the rod, where it fits into the crosshead, is some-times relieved or undercut over a length slightly greater than t
. The Locomotive. he may giveinstructions to the mechanic he employs. Even with skilled handsto do the work the owner will naturally have some interest in thereasons for the steps that are taken. The more usual construction that is found in this type of cross-head and piston rod joint is the one in which the end of the rod istapered, although the straight cylindrical end is sometimes used. Thesetwo variations in the general construction are illustrated in Figs. Iand 2. The end of the rod, where it fits into the crosshead, is some-times relieved or undercut over a length slightly greater than that takenup by the keyway. This is illustrated in Fig. 3. The cylindrical endis also made with the outer or tip section of a slightly smaller diameterthan the inner section, the part between the two being undercut. Itshould be borne in mind, however, that any reduction in the diameterof the rod will naturally weaken it and undercutting should not bedone without due consideration of this effect. Furthermore, sudden. 192-.] THE LOCOMOTIVE 37
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Keywords: ., bookauthorhartfordsteamboilerin, bookcentury1800, bookdecade1860
