. The railroad and engineering journal . wJieel-cenlers? Answer. The insides of the tires are usually turned out some-what smaller than the outside of the wheel-center. The tire isthen heated so that it will enough to go on the is then cooled off, and the contraction of the melal binds itfirmly aiound the cast-iron part of the wheel. As an additionalsecurity, bolls or set-screws, a, u, fig. 254, are screwed throughthe rim and into the tire to prevent it from slipping off in caseit becomes loose. Question 442. How are tires held on the wheels in case theformer break ? Answer.


. The railroad and engineering journal . wJieel-cenlers? Answer. The insides of the tires are usually turned out some-what smaller than the outside of the wheel-center. The tire isthen heated so that it will enough to go on the is then cooled off, and the contraction of the melal binds itfirmly aiound the cast-iron part of the wheel. As an additionalsecurity, bolls or set-screws, a, u, fig. 254, are screwed throughthe rim and into the tire to prevent it from slipping off in caseit becomes loose. Question 442. How are tires held on the wheels in case theformer break ? Answer. In Europe and on some railroads in this country thetires ate fastened to the wheel-centers by what are called retain-ing rings. Fig. 277 represents a section of a tire fastened inthis way. The fastenings consist of flat rings, A A, which areplaced on each side of the wheel and tire and fastened withbolts, £>. The rings have annular projections, C C, which fitinto corresponding grooves in the tiies. In case the lire should Fig.


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Keywords: ., bookcentury1800, bookdecade1880, bookidrailroadengi, bookyear1887