The Practical mechanic's journal . ded in the removal of the engines. The operation of squaring off the ends of railway bars presented newground for the employment of the emission principle, and in this case ithas been most successful. The work performed by saws of this class ismost irregular and trying, insomuch that it is injudicious to attempt itwith the usual saw gearing, which is, besides, not always of convenientapplication. By placing an emission engine on the saw shaft, a direct .Fig. 1. acting power is obtained in a most simple manner, and any sp; re steamof the works may be economica
The Practical mechanic's journal . ded in the removal of the engines. The operation of squaring off the ends of railway bars presented newground for the employment of the emission principle, and in this case ithas been most successful. The work performed by saws of this class ismost irregular and trying, insomuch that it is injudicious to attempt itwith the usual saw gearing, which is, besides, not always of convenientapplication. By placing an emission engine on the saw shaft, a direct .Fig. 1. acting power is obtained in a most simple manner, and any sp; re steamof the works may be economically applied in this way. Another application which we now propose to describe, has been laidbefore us by Mr. Archibald MKechnie of this city. This is as a pro-peller for the fan-blast. Fig. 1 is a longitudinal section of the engine,as coupled to the driving spindle of a fan. Fig. 2 is an end elevationof the engine, with the side of the steam case removed. The steam wheel, A, has four emission arms, which, together with the Fig. fly-wheel, b, are cast in one piece. It is provided with a long stoutb jss, by which it is keyed upon a wrought-iron shaft, made hollow atone end for the entrance of the steam. This boss fits close up at theends between the sides of the case, where it abuts against the ends ofthe brasses of the steam-tight bearings, which are fitted into projectingnecks, cast on each side of the case for the support of the wheel. Thebearings are adjustable by set-screws fitted into the upper sides of thenecks, and the main shaft is retained and adjusted laterally by a nutat 0. The steam enters at d, by a cast-iron pipe bolted up to the flangeof the neck; it then passes along the tubular portion of the shaft, andthence passes into the arms of the wheel through four holes, whichmeet the end of the tube. The shaft may either be in one piece with the fan shaft, or it may becoupled to it in the usual manner, according to the locality. The exitopening for the air, in the f
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Keywords: ., bookcentury1800, bookdecade1840, bookidpra, booksubjecttechnology
