. The railroad and engineering journal . \ Fig. 190. K--2---*r--—S-—M ^o^ r! 11 I I Fig. Fig. 192. ECCENTRIC STRAP fcol:- V /«.-= /. ing lines e e and (//through the points thus laid down. Curvesshould be drawn, with radii /? and ;• equal to the radii of thetwo bosses, tangent 10 the outlines of the bosses and the linese e and d f. The thickness G of the crank-arm where it joins the large boss isequal to } D, and the thickness g is e</ual to J /. To draw the out-line Cg, lay off the thickness from /; and /, and draw vertical The diameter D of the shaft inside of the hub of the crank i
. The railroad and engineering journal . \ Fig. 190. K--2---*r--—S-—M ^o^ r! 11 I I Fig. Fig. 192. ECCENTRIC STRAP fcol:- V /«.-= /. ing lines e e and (//through the points thus laid down. Curvesshould be drawn, with radii /? and ;• equal to the radii of thetwo bosses, tangent 10 the outlines of the bosses and the linese e and d f. The thickness G of the crank-arm where it joins the large boss isequal to } D, and the thickness g is e</ual to J /. To draw the out-line Cg, lay off the thickness from /; and /, and draw vertical The diameter D of the shaft inside of the hub of the crank is4^ in. Just back of the crank it is 4I in., a shoulder beingturiu-d on it to limit the movement of the crank. The crank-pin where it fits into its hub is made either siraight or slightlytapeied, and is driven or pressed into the boss and livcted on theback side of it. The key in the shaft is proportioned in the same way as the Vol. LXIV, No. II.] ENGINEERING JOURNAL. 519 keys for pulleys—that is, its luidlh W = J thi diameter D of llieshaft -\- \ in., and its thict:ness is equal to o
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
