. The Locomotive . etter, but easier to make. This better form, which is illustrated in Fig. 4, isknown as the inside frame, because it lies whollywithin the boiler. The seat, c c, against which the coverrests, can be planed true without the least sheet can be readily caulked along the edges indi-cated by the dotted lines ; and the cross-gfection of theframe is greatest directly under the highest point of theshell, which is a most important advantage, because it isthere that the frame is exposed to the greatest tensilestrain, as already noted. The internal type of frame hasbeen
. The Locomotive . etter, but easier to make. This better form, which is illustrated in Fig. 4, isknown as the inside frame, because it lies whollywithin the boiler. The seat, c c, against which the coverrests, can be planed true without the least sheet can be readily caulked along the edges indi-cated by the dotted lines ; and the cross-gfection of theframe is greatest directly under the highest point of theshell, which is a most important advantage, because it isthere that the frame is exposed to the greatest tensilestrain, as already noted. The internal type of frame hasbeen used and recommended by the Hartford SteamBoiler Inspection and Insurance Company for many years,and has given universal satisfaction. When the boiler isvery small, so that the space above the tubes is more orless cramped, the internal frame is sometimes objectiona-ble ; but in all other cases it is decidedly superior to any other form. Fif. 5 shows the usual method of securing the cover against the frame, by means. -^i^^ Fig. 5. — Usual Method OF SECURrSG THE CoVER Plate. of a yoke and bolt.
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Keywords: ., bookauthorhartfordsteamboilerin, bookcentury1800, bookdecade1860
