. Marine Engineer . male screw. < )n the ring being rotatedby the handle, as shown on the right-hand side ofFig. 5, the face of the ring can be brought up to, andbe receded from, the furnace front, so that the area ofthe air-passage can be regulated at will. In order to obtain a further supply of heated air inthe vicinity of the lire-bridge, some ot the screwedstays in the back of the combustion chamber are inthe form of tubes through which air enters and,passing along a fire-brick channel, is heated, and,finally passing through holes in the bridge, it comesin contact with the furnace gases
. Marine Engineer . male screw. < )n the ring being rotatedby the handle, as shown on the right-hand side ofFig. 5, the face of the ring can be brought up to, andbe receded from, the furnace front, so that the area ofthe air-passage can be regulated at will. In order to obtain a further supply of heated air inthe vicinity of the lire-bridge, some ot the screwedstays in the back of the combustion chamber are inthe form of tubes through which air enters and,passing along a fire-brick channel, is heated, and,finally passing through holes in the bridge, it comesin contact with the furnace gases. The arrangementot the bridges or baffles is clearly shown in tin-sectional \ iew Fig. 5. and requires no further descrip-tion. When it is desired to use coal instead of liquid fuelthe burner fitting is removed from the fire door, thecast-iron damper is replaced by an ordinary platedamper, and the furnace is furnished with the usualdead-plate, firebars and bridges, an operation takinga relatively short time. 1 is i. December i. 1907. THE MARINE ENGINEER AND NAVAL ARCHITECT. 165
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondon, bookyear190
