Specification of Junius Smith : furnaces.

  • Smith, Junius.
Date:
1854
Catalogue details

Licence: Public Domain Mark

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

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    Smith's Improvements in Furnaces. where the amount of pressure within the fans will be the same as the pressure of the heat and gases within the outer chamber E, and the quantity of the gases admitted is to be regulated by a sliding valve cover over the opening l, moved by a handle going through the outer box E. The second mode of admitting and regulating the quantity of the entering 5 gases is shewn in the detached Figure 9. In this the collar k is fixed in a neck on the exterior box, and does not revolve with the blower, as in the other modes described, and has, in any part, an opening x between the inner and outer boxes, that is to be more or less closed by a bent plate y, forming a circular slide or valve to regulate the quantity of the gases admitted. 10 The third mode is shewn in Figure 3, where a small stationary collar k1 is shewn on one side as made conical, the smallest end inwards, within the running collar k, leaving a space m between the collar tube k and the inner edge of the disk or plate ring i, which will allow the entrance of the gases into the blower at the part where they will be forced in by the general internal pressure in the 15 chamber E. The other collars may either be made to run the same, or be made tight as represented. The passage way n from the blower into the closed ash pit is shewn in Figure 2 as opening direct, and in Figures 3 and 4 as entering by a flat horizontal funnel or tube n1, extending to the further end of the ash pit, and terminating in an opening n2 on each side of the tube n1. In Figures 5 20 and 6 the passage way from the blower to the ash pit is shewn as a descending flue. In Figure 4 the rib o, round the ash pit C, supports a plate p, between the fire bars and the entering blast of hot air and gas. This plate p is perforated full of small holes, and receiving the first pressure of the blast, disseminates it equally against and through the under part of the fire. In the bottom of the 25 exterior box E is a box v, shewn separately in Figure 8, the top and bottom of which are formed by a wire or metal grating, and the space within is filled with small pebbles, fine gravel, coarse sand, or pummice stone pounded, or any similar compound that will, in quantity or texture, or both, offer a partial resistance to the internal, general, and equal pressure created by the action of the blowTer. 30 The uncombustible gases generally from burning fuel, being specifically heavier than those which are combustible, will by their own gravity separate from the others, and in the first instance lodge on the bed of sand or gravel, where the compression created by the blower will operate in aid of their increased gravity to force such gases through the sand or gravel into the space beneath, whence 35 they may be conveyed away in any convenient manner, as by the escape pipe u, shewn in Figure 2, or by the pipe u, Figures 5 and 6. In these last Figures the bed of sand or gravel v is shewn as under the exterior case E, and the pressure and filtration from within is upwards through the gravel or sand into