Railroad Accidents: Their Causes And the Means of Preventing Them
Railroad Accidents: Their Causes And the Means of Preventing Them
With, Emile, B. 1816
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It is true that when an axle breaks, it suffers extraordinary torsions, for the rupture may be the consequence of the accident ; a broken axle may throw the train off the track, and a train going off the track may produce the fracture of an axle. Straight axles break only in the journals,* crank axles may also break in the part forming the crank. Let us examine now the irregular motions which bring about this alteration. Shocks arise, firstly, from irregularities in the sur- face or line of the... track, from the bending of rails, from the momentary depression of joints, from oscil- lations of the cars, and from the weight of the engine and the load pressing unequally upon the springs. Torsions are produced by the unequal running of wheels with coned tires round curves; one of the wheels slides, while the other turns ; this inequality of running of a cone on a plane surface is corrected by the torsion of the axle, which ceases, when its in- tensity, which corresponds to the elastic force of the iron, attains its maximum.
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