. Ingegnere americano e giornale ferroviario. T sulla testa posteriore. La cupola, come si vedrà nell'illustrazione, è un pezzo fuso in acciaio, con i giunti per il doppio portedTHROTTLE e i tubi di vapore esterni che formano parte della stessa colata. La costruzione della camera di andit- farfalla è stata illustrata nell'ottobre 1906, numero, mentionedabove. La disposizione dellaestremità anteriore, che è molto simplifieddall'assenza dei tubi del vapore, è mostrata in una delle figure. Il collegamento tra i due telai è molto simile a quello usato sui motori precedenti, princ diverso
2849 x 877 px | 24,1 x 7,4 cm | 9,5 x 2,9 inches | 300dpi
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. American engineer and railroad journal . t on the back head. Thedome, as will be seen in the illustra-tion, is a steel casting in one piece, with the joints for the double portedthrottle and the outside steam pipesforming part of the same casting.The construction of the throttle andit-, chamber was illustrated in theOctober, 1906, issue, mentionedabove. The arrangement of thefront end, which is much simplifiedby the absence of the steam pipes, isshown in one of the illustrations. The connection between the twosets of frames is very similar to thatused on the previous engines, differ-ing principally in being a little light-er. A different type of saddle, whichis stronger and probably lighter thanthe usual box design used in theearlier order, is found in this design.The details at this point are evidentin the illustration of the frame con-nection. The spring centering device forguiding the front set of frames * Sec American Engineer and RailroadJournal, Aug., 1906, p. 300. June, 1907. AMERICAN ENGINEER AND RAILROAD JOURNAL. 215. PLAN, 2-6-6-2 TYPE MALLET COMPOUND LOCOMOTIVE—GREAT NORTHERN RAILWAY. The construction of the receiver and exhaust pipes with theirball and slip joints was shown in the previous article, as wasalso the MCarroll air reversing gear used on these locomotives. The general dimensions, weights and ratios of the freight loco- is the same as that used before, and is shown herewith. Briefly, it consists of a saddle fastened to the boiler shell, which extendsdown and can form a bearing on a cross tie across the top ofthe frames directly below it. Normally, however, there is y^-m.clearance at this point. Within the sad-dle casting are arranged two sets ofcoiled springs enclosed in housings, hav-ing bearings so arranged as to permitfree inward movement and to resist out-ward movement by the compression ofthe springs. The spring cap which hasfree movement within the spring cast-ing or housing is connected to a rodwhich is hinged at its outer end to anext
