Specification of Charles Stevens : smoke-consuming furnaces.

  • Stevens, Charles.
Date:
1861
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Charles Stevens : smoke-consuming furnaces. Source: Wellcome Collection.

    7/10 (page 5)
    Specification. A.D. 1800.—N° 2942. 5 Stevens Improvements in Smoke-consuming Furnaces. The whole of the arrangements above described may be applied to fixed machines. Thus the arrangement indicated, Fig. 8 is represented Fig. 9 as applied to a fixed steam engine. A, B, and C, D, are the boiler tubes of the machine; E,F, the double 5 partition already described, connected at its upper part by ordinary tie pieces, and at the lower part by tubes, in which the flames pass; this double parti¬ tion, which contains water communicating with that in the boiler tubes, serves as heating surface; G, H, F, is the grate on which the fuel is placed, the latter being introduced together with the air serving in the combustion by the 10 door K. The door L, which is kept shut, is used when the ash box is to be emptied, or the fire stoked. Another door, not indicated in the Figure, is placed in the stonework of the side, for the purpose of cleansing the space E, F, M, N. A, B, C, D, Fig. 10, shows the longitudinal section of the fire box of an 15 ordinary locomotive. This fire box is entirely closed from B to C by an •ordinary bottom piece, which may also be doubled and held together between the points B, E, and will then contain water communicating with that in the boiler, and serve as heating surface. G, F, is a second partition, also double, and containing water in communication with that in the boiler, and is held 20 together by ordinary tie pieces, its two faces serving as heating surface. This partition has at the point II a door, which is kept shut during the move¬ ment of the machine, and serves, when it is desired, to examine or stop the tubes T, and as this door is at any moment liable to become exposed to the fire on both sides, it should be placed at the side of the fire box 25 as at the point H. At the point F on the side of the fire box a suitable opening is arranged for cleansing the interior of the partition G, F, from incrustations; this opening may be closed by means of a screw plug; I, J, K, L, is an ordinary grate formed of S-shaped bars, having laterally, from L to Iv, fastenings for maintaining the bars at proper distances ; P is the fuel, which 30 is introduced as required by the door I, M. The air necessary for the com¬ bustion enters at the same door, crosses the upper part only of the fuel, and the lower part of the grate I, J, K, L, passes through the fuel, reaches with the gases the tubes T of the machine, and escapes by the chimney. A door is placed at the point N, by means of which the ashes are removed and the fire 35 stoked, and which, if required, allows the entrance of a little air to direct the fire properly during the movement. All the above arrangements are applicable to fixed machines. In those which are not worked by steam, and in which there is no boiler filled with water, which may be placed in communication with the interior of the partition