Specification of Constant Jouffroy Duméry : smoke-preventing apparatus.

  • Duméry, Constant Jouffroy.
Date:
1855
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Constant Jouffroy Duméry : smoke-preventing apparatus. Source: Wellcome Collection.

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    Dtimery s Improvements in Smoke-preventing Apparatus. to be supplied, but in properly dividing, mixing, and uniformly distributing the same; and for attaining these ends I have devised the following contrivances, which have various constructions, according to the nature of the case to which they are applied, viz.:—Certain charging boxes; also a grate which is moveable in the vertical direction upon its whole surface; also a fixed grate having arti- 5 ficial or moulded fuel and a charging drawer; also troughs with vertical grates for natural coal with a discharging drawer; also curved scuttles, horns, or trumpets, that are stationary, and in which the coal alone is displaced. As to the first of these apparatus, viz., charging boxes, they represent the improved apparatus in its simplest form (see Figs. 1 and 2, Sheet 1). They 10 consist of boxes having the shape of desks, the top of which is pierced with holes or slots, the bottom being sliding. In order to use the boxes, supposing the fire box at work and filled with coal that is in a state of coke, I slide between the grate and the coke a false grate or perforated shovel, and raising this shovel, I form an angular space opening towards the door, and into which 15 the charging box is introduced after having previously been filled with coal. The box having thus been placed, the false grate is taken out, so as to let the incandescent coke lie upon the box, thus heating the coal; the bottom of the box is also slided out, so as to give passage to the air; and finally the whole box is taken out, so as to put the ignited coke into direct contact with the raw 20 coal. In this manner air is directly admitted to all the points where gas is formed and whilst it is being formed. This method of working is very simple and ^inexpensive to establish; however, as the doors have to be opened, as in ordinary charging, and on account of the cooling resulting therefrom, I only apply it in those cases where coal is cheap and the furnace not too large. $5 As to the second form, viz., grates which are so constructed as to rise with their whole surface equally, I make them with two trestles, one of which is in front, & the other at the back of the fire box, and upon which I place the grate bars and grate frame. Instead of legs, the trestles have racks (see Fig. 3, Sheet 1), that allow raising and lowering the cross bars 30 of the same ; each grate bar whilst rising meets under the upper plane of the grate a click, which holds and prevents it from descending when the trestles are lowered again. When the apparatus has just received a charge, and the trestles have re-descended, the grate bars and the four sides forming the frame are put into their places, and the grate is charged with coal; 35 the whole is then raised so as to put the cold coal into contact with the under side of the grate that has been raised previously. The bars are then taken out one by one from the upper grate, and the lower grate is fully raised, so as to occupy the same place as the grate bars just taken out. When