. A practical treatise on railways, explaining their construction and management ... being the article "Railways" in the seventh edition of the Encyclopedia britannica, with additional details . Fig. 20 is the wheel patented by Mr. Losh. The spckes,rim, and tire of this wheel are all of wrought iron. Thespokes are made out of boiler plate, and bent so as to formthe rim as well as the spoke; and the two ends of eachcoming into the centre, and having been previously heated,the nave is cast round them. Wrought iron hoops aresometimes shrunk on to each side of the nave to guardagainst its splittin
. A practical treatise on railways, explaining their construction and management ... being the article "Railways" in the seventh edition of the Encyclopedia britannica, with additional details . Fig. 20 is the wheel patented by Mr. Losh. The spckes,rim, and tire of this wheel are all of wrought iron. Thespokes are made out of boiler plate, and bent so as to formthe rim as well as the spoke; and the two ends of eachcoming into the centre, and having been previously heated,the nave is cast round them. Wrought iron hoops aresometimes shrunk on to each side of the nave to guardagainst its splitting. The tin is rolled with a bead inside, RAILWAYS. 131 which takes against the inner rim and prevents its comingoff; and it is put on by being heated red hot, its contractionin coohng giving it a firm hold on the inner rim. ThesHght bend given to the spokes, which is done to induceelasticity, was not in the original specification of the patent. Fig.
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