. American engineer . gases considerably above the buildings im-mediately adjacent to the engine house, but, owing to the sizeof the stack, permit of considerable precipitation of the heavierparticles. The stack will be so located that it will be possibleto interpose smoke washing apparatus between it jmd the fan,should a sufficiently promising method be developed.—D. before the International Society for the Prezention ofSmoke. BY W. R. HEDEMAN Probably the first parts of a new locomotive to need replace-ment are the grates, due to the heat to which they are sub-jected, and anything
. American engineer . gases considerably above the buildings im-mediately adjacent to the engine house, but, owing to the sizeof the stack, permit of considerable precipitation of the heavierparticles. The stack will be so located that it will be possibleto interpose smoke washing apparatus between it jmd the fan,should a sufficiently promising method be developed.—D. before the International Society for the Prezention ofSmoke. BY W. R. HEDEMAN Probably the first parts of a new locomotive to need replace-ment are the grates, due to the heat to which they are sub-jected, and anything that will tend to improve and prolongtheir life should be gladly received by motive power men. Itis the hope of the writer that the information contained in thisarticle will be beneficial to those who are seeking to better thegrate design and arrangement. There must be enough opening in the grates to permit all theair coming through the damper openings to pass through, inJ- --—2if- .. -^a|^ /jj ^ x,!-__—^^^ ^y. Fig. 1—Table Grate Bar. order to produce proper combustion; one square foot of damperopening to seven square feet of grate area is a good standardtoward which to work. Fig. 1 shows a table grate bar with re-inforcing strips of wrought iron or steel cast in it. This is anexcellent bar, but is more expensive than one made entirely ofcast iron. Owing to the narrowness of this type of grate afront and back dump grate are necessary. Fig. 2 shows a fingergrate bar reinforced with wrought iron. This type of bar hasbeen used very extensively and is especially good in breakingup the fire where lumpy coal is used. It must be kept level, asthe fingers will burn off if allowed to extend up into the fire.\\ ith the foregoing tj-pes of grates dump grates are necessary. ->j/i)<- -3-0S-- -zloi- [^■ -Hij*- 23 8,. ulULfeU-LMX V\ 4 jniTii^^ J^J^JS iTi ,^^^^^^^^ -Dili-
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
