Construction de chaudières de locomotives; un traité pratique pour les fabricants de bateaux, les utilisateurs de chaudières et les inspecteurs .. . Figure 244extrémité avant de la chaudière. Frapper Derry-Collard Co. Conditions entourant le chemin de fer où la chaudière est utilisée, comme le carburant et le pays traverse. Parfois, le filet est fait de fil qui est tissé en mailles carrées, deux, trois ou quatre à l'pouce, mais souvent ils sont faits de plaques perforées et les trous sont perforés comme un des styles illustrés dans la Fig. 242. Ces plaques peuvent être façonnées sous forme et perforées avec une marge. Mais beaucoup les 260 détails de front. Moins cher

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Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 244Front end of boiler. Hit Derry-Collard Co. conditions surrounding the railroad where the boiler isto be used, such as fuel and country run through. Sometimes the netting is made of wire which iswoven into square meshes, two, three or four to the inch, but frequently they are made of perforated plates andthen the holes are punched like some one of the stylesshown in Fig. 242. These plates can be shaped in anyform and punched with a margin. But much the 260 Front end details. cheapest job, and one which is satisfactory in every way, consists in buying the sheets all punched and then trim-ming off to fit into place the same as netting. The piecescut off can be used for patching in corners on the job.The cinder pocket is arranged in many different. Figure 245 Figure 246 Clamps for front end door. ways, either to be cleaned by hand or by a jet of steam, although the former is the more frequent. In Fig. 243, acinder pocket T is shown. The slide fits in snugly allaround so as not to admit any air, and for this reason theslide should always be planed. The cap C is bolted onand admits of a plain surface on the body and the cap.The upper part of the pocket is bolted to the boiler bystuds. These holes must be vertical and the studs mustbe screwed into place. Then the hopper is entered overthe studs and bolted up solid. The chipping strip shouldbe chipped to fit the boiler. The front end of a locomotive boiler is shown inFig. 244. A is a piece of boiler plate turned on its outer 261 Front end details. edge and bolted to the ring R which is faced off on theoutside to receive it. B is the front door. This isflanged out spherical in shape and turned off so as to fitagainst the plate. The door is supported by strap hingesH and studs S. A lot

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