Specification of Robert Hawthorn and William Hawthorn : promoting combustion and prevention of smoke in coal-burning locomotives, &c.

  • Hawthorn, R. (Robert)
Date:
1859
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Robert Hawthorn and William Hawthorn : promoting combustion and prevention of smoke in coal-burning locomotives, &c. Source: Wellcome Collection.

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    R. <$f W, Hawthorn s Impts. in Preventing Smoke in Coal-burning Furnaces, d‘C. NOW KNOW YE, that we, the said Robert Hawthorn and William Haw¬ thorn, do hereby declare the nature of our said Invention, and in what manner the same is to be performed, to be particularly described and ascer¬ tained in and by the following statement, reference being had to the accom- 5 panying Drawings, and to the letters and figures marked thereon, that is to say:— Our said Invention relates to a peculiar construction and arrangement of apparatus to be applied to the fire-doors or other convenient portions of loco¬ motive or other steam engine fire-boxes or furnaces, whereby the air is 10 supplied to the fuel in such a manner that a more perfect combustion and prevention of smoke is obtained. According to this Invention it is proposed to employ a number of inclined deflecting plates fitted to the door or doors, or other parts of the fire box or furnace, and their lengths from back to front should not be less than the 15 thickness of the casing in locomotive boilers, but should rather project beyond it inside the fire-box. Deflecting pieces may or may not be interposed between the plates for the purpose of deflecting the air right and left over the surface of the fuel. And it is also proposed to use an arrangement of steam jets to be introduced into the fire-box or furnace through the back part and 20 on each side of the fire door or doors, to a little above the surface of the fire. These deflecting plates and the mode of applying the steam jets may be used either in combination or separately. Suitable regulating valves or adjustable apertures may be employed for regulating the supply of air to the furnace, but in all cases the air so supplied 25 will be subdivided into a series of thin sheets, and will have its velocity greatly accelerated, and temperature raised by being confined between the deflecting plates in its passage. And in order that our said Invention may be fully understood we shall now proceed more particularly to describe the same, and for that purpose we shall 30 refer to the several Figures on the Sheets of Drawings hereunto annexed, the same letters of reference indicating corresponding parts in both Sheets of Drawings. Figure 1 on Sheet 1 of our Drawings represents a front elevation of a deflecting fire-door constructed according to our Invention; Figure 2 is a 35 vertical longitudinal section of the same ; and Figure 3 is a sectional plan of the door. A, is a metal frame (shewn in dotted lines in the elevation), in which frame the deflecting plates B, B, are fitted by means of bolts C, C, passing vertically through the top and bottom of the frame, and through the