Specification of William Hopkinson and John Dewhurst : consuming smoke.

  • Howarth, William
Date:
1858
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Hopkinson and John Dewhurst : consuming smoke. Source: Wellcome Collection.

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    Hopkinson § Dewhurst's Improvements in Apparatus for Consuming Smoke. performed, and cause the same to be filed in the Great Seal Patent Office within six calendar months next and immediately after the date of the said Letters Patent. NOW KNOW YE, that we, the said William Hopkinson and John Dewhurst, 5 do hereby declare the nature of the said Invention, and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement thereof, that is to say:— This Invention has for its object improvements in apparatus for consuming smoke. For these purposes the furnace is divided in the middle in a direction 10 from back to front, but the partition does not come completely to the front, a space being left for the passage of the smoke and products to pass from one compartment of the fire-place or furnace over the well-ignited fuel in the other compartment. At the back end of the furnace, or in the bridge, there are two slides or dampers, each capable of closing one of the compartments into which 15 the fire-place or furnace is divided. These slides or dampers are each actuated by a bell crank, to one end of which the damper or slide is attached by a con¬ necting rod, and to the other end of such bell crank a rod is attached previous to feeding either compartment with coal; the slide or damper of the compart¬ ment is raised so as to close the outlet at the back end of the furnace, by 20 which all the products will pass to the front end of the compartment, and then over the well-ignited fire in the other compartment, and so on alternately. It may be stated, that it is not new to divide a furnace into two compartments for such purposes; the novelty consists in the peculiar combination of apparatus. When applying the Invention to locomotive, boiler, and such like furnaces 25 where tubes are used, the fire-box is divided into two compartments by a suitable midfeather with passages through it, and slides or shutters are used to close the further ends of one half of the tubes, the fuel is applied alternately to the two compartments, and the smoke or products arising in one compart¬ ment of the fire-box after coaling will pass through the midfeather, and thence 30 over the fire in the other compartment, and through the tubes of such other compartment. And in order that our said Invention may be most fully understood and readily carried into effect, we will proceed to describe the Drawings hereunto annexed. 35 Description of the Drawings. Figure 1, Sheet 1, is a transverse section, and Figure 2 is a longitudinal section, of apparatus for consuming smoke arranged according to our Invention and applied to a cylindrical boiler, a is the boiler; b, the brickwork in which
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