. The Street railway journal . FIG. 5.—CORE ROOM. FIG. 6.—CLEANING WHEELS BY SAND BLAST. resulting wheels by their freedom from dirt and sand show prettyclearly the advantages of these improvements in casting. The perfection of a car wheel is not however ahogether depend-ent upon the facilities for casting, the size of the foundry or itscapacity for melting iron. A complete knowledge of both physicaland chemical qualities of the iron are also necessary. The GriffinCompany in order to produce a first class wheel analyzes its iron forsilica, manganese, carbon, sulphur, phosphorus andiron, and di
. The Street railway journal . FIG. 5.—CORE ROOM. FIG. 6.—CLEANING WHEELS BY SAND BLAST. resulting wheels by their freedom from dirt and sand show prettyclearly the advantages of these improvements in casting. The perfection of a car wheel is not however ahogether depend-ent upon the facilities for casting, the size of the foundry or itscapacity for melting iron. A complete knowledge of both physicaland chemical qualities of the iron are also necessary. The GriffinCompany in order to produce a first class wheel analyzes its iron forsilica, manganese, carbon, sulphur, phosphorus andiron, and dividesthe carbon into three forms, graphitic or non-metallic, carbide and depth of chill to be obtained by the use of hard iron, while a suffi-cient quantity of metal can be used to obtain all the strength neces-sary. On such wheels, the company gives a guarantee that allwheels shall make 40,000 miles under fair usage. This means how-ever that wheels broken in collision and skidded by careless motor-men shall not be charged
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
