Specification of John Frederick Wieland : bakers' ovens.

  • Fortescue, John.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John Frederick Wieland : bakers' ovens. Source: Wellcome Collection.

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    Fortescues Impts. in the Construction of the Furnaces of Bakers' and other Ovens. NOW KNOW YE, that I, the said John Fortescue, do hereby declare the nature of the said Invention, and in what manner the same is to be per¬ formed, to be particularly described and ascertained in and by the following statement in writing, and on reference to the accompanying Sheet of Drawings, 5 that is to say :— My Invention is designed principally for consuming smoke in the furnaces of bakers’ ovens, but with slight modifications is also applicable to other furnaces. The furnace is provided with outer and inner doors, and is furnished at the top, at the end next the oven, with a block or inverted bridge, 10 extending downwards across the furnace. Over the inner door is an opening, extending across the furnace, and the outer door is provided with a pro¬ jecting block, which, when the outer door is closed, fits into the said opening, and renders the same air-tight, or nearly so. When fresh fuel is supplied to the furnace the outer door is left open and a current of air admitted, which 15 in passing over the top of the furnace becomes heated, and is thrown down¬ wards by the block or inverted bridge at the end of the furnace, and meeting with the upward current of air through the furnace bars effectually consumes all the smoke and gases evolved from the fuel. The admission of the proper quantity of air necessary to consume all the smoke is regulated 20 by opening or closing the outer door of the furnace, which should not be left open wider than is necessary to admit the minimum amount of air required. By the use of this Invention the draught is increased, the smoke is con¬ sumed or prevented, and a great economy in fuel is effected. Such being the nature and object of my said Invention of “ Improvements 25 in the Construction of the Furnaces of Bakers’ Ovens for the Purpose of Consuming Smoke, which Improvements are also applicable to the Consumption of Smoke in other Furnaces,” I will proceed to describe the manner of carrying the same into practical effect. And in order that the same may be readily understood I have annexed unto these Presents a Sheet of Drawings 30 illustrative thereof, and have marked the same with figures and letters of reference, corresponding with those in the following explanation thereof, similar letters of reference being placed upon corresponding parts of the apparatus in all the Figures. Figure 1 in the Drawing represents a front view of the furnace of a bakers’ 35 oven with my improvements applied thereto, the outer door of the furnace being represented as open; Figure 2 is a vertical section, taken in a longitudinal direction through about the centre of the furnace, both doors being shewn closed; and Figure 3 is an horizontal section, taken through about the line A, B, in Figure 1.