Specification of John Miller : furnaces.

  • Miller, John.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John Miller : furnaces. Source: Wellcome Collection.

    5/8 (page 3)
    Miller s Improvements in Furnaces. sumption of the smoke is more perfectly effected than heretofore, and great economy of fuel attained. In order to explain my said Invention as completely as possible, I now proceed to describe the best means I am acquainted with for carrying the 5 same into practical effect, reference being had to the illustrative Drawing hereunto annexed, and to the numeral figures and letters of reference marked thereon respectively, as follows :— Description of the Drawing. Figure 1 is an elevation of a furnace door constructed according to my said 10 Invention, shewing the arrangement and disposition of the air plates, as they would appear if the furnace door were closed ; Figure 2 shews the furnace door open, and exhibits the aforesaid plates at the inside of the door; Figure 3 is a skeleton door frame without the aforesaid plates; Figure 4 is a top plan view of the air plates and case which contains them, as they would appear 15 when detached from the door frame, exhibiting the air space between the two tiers of plates. At each of the foregoing Figures I employ similar letters of reference to denote corresponding parts, in so far as such parts appear or can be seen at each of such said Figures respectively. A, A, is a casting, to which is hinged a skeleton door or frame B; C, C, are 20 castings, securely fixed in any convenient manner to the upright sides of the opening of the aforesaid skeleton door or frame B, as at Figure 1. The castings C, C, have projecting pieces or ribs a, a, formed thereon in an inclined direction, and in opposite directions, so that when the plates D, D1, are laid thereon, they shall form a double louvre as it were, D representing one set of louvre plates 25 inclining in one direction, and D1 another similar set of louvre plates inclining in an opposite direction; and said plates are placed at distances apart for the external air to pass between them, as at b, Figure 1, and c, Figure 4. For the convenience of inserting and removing the plates D, D1, in and from the castings C, C, I form notches d, in the edges of such said castings, as exhibited 30 at Figures 1 and 2. I would here remark that the angle of inclination of the plates D, D1, is immaterial, and will be governed principally by the distance which each pair of plates are asunder, so as to prevent and obstruct the direct radiation of heat from the furnace fire through tbe air spaces between the aforesaid plates; and further, the size and number of the plates must be deter- 35 mined .according to the size of the furnace to which they are to be adapted, so as to allow sufficient quantity of air, and not more, to enter the furnace to support active combustion of the fuel therein. The air in its passage between the plates D, D1, becomes heated thereby before coming into contact with the