Specification of Samuel Hall : steam engines, boilers, furnaces, &c.

  • Hall, Samuel.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Samuel Hall : steam engines, boilers, furnaces, &c. Source: Wellcome Collection.

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    Hall's Improvements in Steam Engines, Eoilers, Furnaces, §c. which the boiler is removed, being taken through Figure 1 from a to a. Figure 3 is a cross section taken through Figure 1 from a1 to a1; and Figure 4 is also a cross section taken through Figure I. from a11 to a11. A is the fur¬ nace ; B, the ash pit; and C is a plate at the end of the furnace, on which the 5 scoria and other incombustible matters are deposited; it moves on an axle, and may be occasionally turned down so as to cause the matters deposited thereon to fall down into the ash-pit. X), D, is a main flue at the sides and back of the ash-pit, for the admission of atmospheric air into the furnace, and above the fuel. E, E, are openings on each side of the ash-pit, for the entrance of 10 the air into such flues ; and F is one of two sliding doors to admit it, and to regulate its entrance, and indeed to shut it off altogether when required. 7i, h, are square fire-bricks, which lay over the flue, resting upon each side of it; and i, £, are intermediate fire-bricks, of a somewhat triangular form, having communications with the main flue aty, y, to convey the air from it in jets 15 through the small apertures /c, k; these two bricks may be made in one brick, the triangular part joining to and projecting from the square part, and these X prefer when they can be procured, as they make the furnace sides much more firm and durable. G, G, is an air flue over the front of the furnace, being connected with the main flue D, D; and l, l, are holes to introduce small jets 20 of air into and over the front of the furnace. Fourth, my improvement in flues relates to the flues of particular sorts of boilers or pans herein-before mentioned, and consists*m the application of two flues instead of one around them, the one causing the flame or heat from the fire to circulate towards the chimney from the right to the left, and the 25 other, which is above it, causing them to circulate from the left to the right. Figures 1 and 2, Plate 5, shew a boiler of the above description; Figure 2 being a horizontal section of it, taken from y to y through Figure X., and Figure I. being another section of it, taken from z to z, through Figure 2. A 30 is the fire-place, and B the ash-pit. a is the entrance at the back of the fire¬ place to the uppermost flue a\ a\ viz1, that which circulates from the right to left, as shewn by the arrows, and terminates in the chimney b; and c is the entrance to the lower flue c\ c\ which runs under flue a1 from the left to the right, and also terminates below it in the chimney. 35 Fifth, my improvement in consuming fuel, as applied to furnaces, already described and shewn by Figures 1, 2, 3, and 4, Plate 4, will be explained by the following description :—c, c, are /ire bars, which are stationary, and d, d, are others which are moveable in a backward and forward direction; there are on all these bars inclined planes e, e, the raised ends of which are at right