File:Transactions (1871) (14763485715).jpg

Identifier: transmining14amer (find matches)
Title: Transactions
Year: 1871 (1870s)
Authors: American Institute of Mining, Metallurgical, and Petroleum Engineers
Subjects: Mineral industries
Publisher: New York (etc.)
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto

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rum D,one for each shell ; feed-pipe F, and blow-off N; the deflection-plate L, over the forward throat, and the dry-pipe or dry-pan J.,the hand-holes plates H, and the hollow stay-bolts 0. The vital improvements in the Heine system over the older formsof its type are : First. Unobstructed circulation of the water, by reason of theample throat-areas, which permit perfect gravity-return at the rearend under all conditions of forced service. Second. Horizontal or gradually ascending travel of the gasescontrolled by light fire-brick tiles or cast-iron troughs placed in thetubes. Third. The availability of a large combustion-chamber at a pointwhere the gases are hottest, thus completing the combustion of thefuel before cooling, by coming in contact with the principal heating-surface. Fourth. Removal of all riveted joints from direct contact with theflames, which make two complete turns before reaching the shell. Fifth. Gradual reduction of velocity of circulation from the point ^^o &,
Text Appearing After Image:
944 THE HEINE SAFETY-BOILER. where the steam is generated to the point where it leaves the water,thus making the evaporating-surface more effective. Sixth. Larger steam-space in front near the steam-outlet; morewater in the rear, where it is wanted for gravity-return. Seventh. Gradual heating of the feed-water in the mud-drum tothe normal temperature of the boiler, thus insuring equality oftemperature and consequentdiminution of expansion-strains through-out the boiler. Eighth. An internal receptacle of practically still water, invitingthe deposit of mud and loose scales at a point where they can bereadily blown off. Ninth. Inside joints of hand-holes closing to the pressure (insteadof against it). Tenth. Blow-off for soot and ashes provided without the necessityfor doors on sides or top of walls. Eleventh. General compactness and accessibility of all parts forinspection from without. These points result from the skilful arrangement of the details asfollows : The inclination of the tu

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