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Orel Dighton Orvis
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Individual
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Individual
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5687. Orvis, O. D. March 7. Tubes, water; water-circulation, promoting.-A water-grate for a down-draught boiler consists of a front header L and a rear header L', connected together by a series of pipes 4, 9, 10, 11 and com- municating with the ends of the return tubular or other boiler A by means of pipes 3, 7, 8. The different sections of each grate are capable of being inserted through the firedoors G. The horizontal header L<1> and the front header L are made in two portions, each portion of the latter having a ver- tical part and an inwardly and downwardly inclined part. The uppermost tubes 10 of the grate are preferably larger than the others and support the arch J. A blow-off pipe 14 is connected to the header L', and a grate M is placed beneath the water-grate, the space between the grates com- municating with the combustion chamber N by flues 13 through the bridge E.