Specification of Andrew Robertson and Alexander Ritchie : steam boiler and other furnaces, &c.

  • Robertson, Andrew.
Date:
1860
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Andrew Robertson and Alexander Ritchie : steam boiler and other furnaces, &c. Source: Wellcome Collection.

    6/10 (page 4)
    Robertson # Ritchie's Improvements in Steam Boiler and other Furnaces, <$fc. granted to Andrew Robertson, one of the present Patentees, on or about the 11th May I860 (No. 1166). The said system, the application of which to ordinary furnaces is more fully detailed in the Specification of the Letters Patent referred to, may here be briefly stated to consist in admitting air from below through the front ends of 5 the fire bars kept uncovered to the requisite extent. In some cases a defining bar A is used to limit or determine the amount of opening, as shown in Figure 1 of the accompanying Drawings, which is a longitudinal vertical section of a steam boiler furnace, embodying a modification of our several 10 improvements. Figure 2 is a longitudinal vertical section, showing another modification of our improved arrangements, and Figure 3 is a transverse vertical section through the boiler and external heating space or chamber corresponding to both Figures 1 and 2. In other cases a separate grating or set of smaller bars B is fitted in front and continuation of the main fire bars C, as shown in 15 Figure 2, the air passing through this grating B, which is provided with a valve or slide D for regulating or adjusting the quantity admitted. In com¬ bination with such admission of air, we, by the present Invention, admit into the inside of hollow furnace bars, or equivalent tubular passages, streams of water or steam, which will escape from apertures of a regulated size in front 20 or at other parts of the fire, the intention being to effect the decomposition of the water or steam, so that its component gases may contribute to the effect of the fire. In Figure 2 of the accompanying Drawings we show one convenient modification of arrangements for practically carrying out this part of our 25 Invention. Instead of altering the ordinary fire bars C, we in this instance introduce the water or steam into the bearers E thereof, made hollow for the purpose. Between these hollow bearers E, and communicating with them, a series of small tubes F are placed, so as to lie between the fire bars C, and it is these tubes F which are perforated for the escape of the water or steam, 30 for the purpose herein-before pointed out. According to another portion of the present Invention, which refers to the application to a steam boiler of the heat obtained in the furnace, the fire grate or chamber G, for combustion or the obtainment of heat, is situated apart from the boiler H, in order that a too early taking up of heat by the 35 boiler may not check the thorough combustion or heat-yielding combination of the matters in the furnace, that is to say, of the constituents of the fuel, water, and air. This system may be practically carried out according to its simplest