Specification of William Smith : furnaces.

  • Smith, William.
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Smith : furnaces. Source: Wellcome Collection.

    6/10 (page 4)
    Smith’s Improved Smoke-consuming Furnace. Description of the Apparatus. Fig. 1 in the accompanying Drawing represents a longitudinal section made at the axis of the apparatus, and lengthwise of the furnace; Fig. 2 is a plan or horizontal section of Fig. 1, exhibiting the two sets of furnace bars, bridge, &c.; Fig. 3 is a transverse section of Fig. 1 and 2, and exhibits the 5 construction of the furnace, the supporting frame, and other parts of the arrangement; Fig. 4 is a front view of the boiler seating and the apparatus, as seen externally. The same letters serve to indicate the similar parts in each of those Figures. By these Figures it will be seen that the apparatus consists of a circular io frame A, which bears the similar and opposite grates E, E, is furnished under¬ neath with a toothed rack L, which it is worked by a pinion J, the prolonged axis of which outside of the furnace is supplied with a crank handle to work by hand whenever it is necessary to change the position of the furnace bars. It is by means of this rack and pinion that the frame and the two grates are 15 caused to make a semi-revolution, so as to be brought forward alternately fr the mouth of the furnace. For this purpose it is guided in its circumference by an iron ring or tram plate 0, partly imbedded in the brickwork, and it is thoroughly supported by a vertical shaft or spindle B, which rests and turns upon a fixed pivot or stud I. A brick bridge or partition C is formed under 20 the frame in order to divide the two grates, having therein one or several openings D, forming a passage or passages for the air and gases to pass through to the second furnace. This partition can evidently be constructed in various ways, and the openings or holes may also be of different forms and dimensions, according to the arrangement of the gra e or the proportion of 25 the furnace, or one part, the upper, may remain fixed, adapted at need to the boiler, and it may be supported or held by one or several bolts, and the lower part only may be moveable with the apparatus itself. In the front of the furnace may be also placed a hopper or feeder with a projector, which being worked by the hand of the stoker would deliver, as 30 required, the necessary quantity of fuel upon the grate immediately underneath, or the latter may be simply fed by means of a shovel, as is now done in the ordinary system, by opening the door at the entrance R. Working of the Apparatus. To set the apparatus in action, it is proper at first to cover one of the grates g- with fuel, which is lit by the usual means. Immediately afterwards turn the frame upon itself, so that this grate charged with coke becomes placed near