. Locomotive engineering : a practical journal of railway motive power and rolling stock . ength of the test specimenin inches. The curves are plotted forgiven stresses and percentages of carbon,which are shown to cover cases from .10of one per cent, to .70 of one per cent.,and have stresses ranging from 58,000 to65,000 pounds per square inch for the up- Notes from the Wilmington Shops. Master Mechanic Turner, of the Phila-delphia, Wilmington & Baltimore Rail-road shops at Wilmington, has a deviceon his wheel press, designed by himselfand used for raising and lowering themachine with reference
. Locomotive engineering : a practical journal of railway motive power and rolling stock . ength of the test specimenin inches. The curves are plotted forgiven stresses and percentages of carbon,which are shown to cover cases from .10of one per cent, to .70 of one per cent.,and have stresses ranging from 58,000 to65,000 pounds per square inch for the up- Notes from the Wilmington Shops. Master Mechanic Turner, of the Phila-delphia, Wilmington & Baltimore Rail-road shops at Wilmington, has a deviceon his wheel press, designed by himselfand used for raising and lowering themachine with reference to the floor level,in order to bring ram of the machine inline with the center of an axle on anydiameter of wheel, from the largest driverto the smallest truck wheel, or a move-ment of about 30 inches. The device, entirely home-made, con-sists of a clutch arrangement placed onthe press near the pulleys driving theplungers, the clutch actuating bevel gears m J* L 325 a. (20 tu co , m 10 w 1 1 ■ 1 ! CURVES FOR Length of Specimens:-! to 8 Grade of Steel:.IO:C-to:JO For Different Lengths of Specimen from Same Glrade Tcstinii Lab. Kress Gauged Length of Specimen in Inches. tveonvHn Biigtiufriitg per, and 140,000 to 150,000 pounds persquare inch for the bottom curve. Theelongations are shown in the vertical col-umn at the left. To read the chart, the perpendicularlines cutting the inches in length of thetest piece are traced to their intersectionwith the curves, as, for example, from 4to the .70 carbon curve, and from therefollowing the horizontal line at this in-tersection out to the left, and thus reachthe percentage of elongation, which isfound to be per cent, at rupture, for atest piece having .70 of carbon and lengthof 4 inches. For any other length thercadmgs are, of course, taken similarly. which transmit motion to a pair of screwsby which the machine is raised or loweredat will. It is a most ingenious device anda convenient way to
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
