Improvements in Stoves or other Apparatus for Burning Fuel.
Year: 1887

page_text: Date of Application, 3rd Mar., 1887
Complete Left, 3rd Jan., 1888
Complete Accepted, 3rd Mar., 1888
PROVISIONAL SPECIFICATION.
Improvements in Stoves or other Apparatus for Burning Fuel.
I JAMES ROOTS Crofton Orpington Kent Engineer do hereby declare the nature
of this invention to be as follows:-
The object of this invention is to consume the smoke of the fuel burning, thus
effecting a saving in the quantity burnt. In a room stove the bars in the bottom
grating are wider apart than usual: the front space from the bottom of the grate to the
hearth is closed by a hinged cover or slide, so that air does not enter here for
combustion or it may be closed by the front wall of a removable ashpan. The flue
is continued downward at the back of the fire to this enclosed space beneath it, the
back of which space is left open to the flue or chimney. Now when the fire is first
lighted the register opening or any ordinary opening into the flue or chimney is left
open until the fire is alight, to enable the smoke to pass up the chimney. This is then
closed, consequently all air for combustion is then carried by the downward draught
to the chimney aperture below the fire, taking the smoke with it through the fire,
consuming it in its passage. In a boiler furnace for steam engines or other purposes,
the chimney is likewise carried below the fire and projects a short distance beneath
the grating which is closed to the outer air, and in the same manner the draught has
first to descend through the fire taking the smoke with it, before it reaches the
chimney.

page_text: JAMES KOOTS 1. Woisicy Gardens runnersbur
the nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
The object of this invention is to consume the smoke of the fuel burning, thus
effecting a saving in the quantity burnt.
Fig. 1 is a section of a room stove in which the bars A are wider apart than in an
ordinary stove, the space below the bars A being closed by a hinged cover or
ashpan B, which prevents the entry of air below the fire when it is in position. The
chimney C is continued downward at the back of the fire to the enclosed space
beneath it, the back and sides of which enclosed space are left open to the chimney.
Now when the fire is first lighted the small door which closes the aperture to the
chimney above, is opened until the fire is well alight and a draught is croated in the
chimney C, D is then closed, when the draught in the chimney by tending to create
a vacuum below the fire, draws the air current down through the fire and taking the
smoke with it consumes the smoke in its passage. Tubes may be employed (not
shewn) to further utilize the heat by conveying the products of combustion partially
or entirely round the room, after the fire is well alight, or this stove may be made
in a circular form and placed in the centre of a room. The bars A may be curved or
straight.
When
Fig. 2 is a section of the invention as applied to a vertical steam boiler.
first lighted the small door B below the fire and the sliding trap D are opened, when
the fire burns in the ordinary way until the fire is well alight, then the doors B and D
are closed, the draught is reversed, the air current passing as indicated by the arrows
down through the fire, taking all smoke with it, consuming it in its passage to the
chimney C the fire bars A are hollow and air passes through them as shewn in
Fig. 2, they may also be perforated as shewn. The passage of the air through the
fire bars by supplying oxygen to the combustion products after having passed
througn the fire ensures their complete combustion and also cools the bars.
Fig. 3 is a modification as a furnace in which the action is the same, but the fire
bars A are placed end on, to the fire, to reduce the burning of the firo bars from the
great heat evolved. The fire bars A may also be made of earthenware or narrow fire
bricks. In Fig. 3 the fire bars may be omitted altogether, the bottom edge of the
wall E being serrated (not shown) but in either case a small quantity of air is supplied
through tubes to the products of combustion after passing through the fire as shewn
by the arrow at the back of the furnace.
Fig. 4 is another sectional view of the same vertical boiler as shewn in Fig. 2.
The invention may be applied in the same way to a horizontal boiler or any
apparatus for burning fuel.
The same letters in each figure apply to the same parts.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The construction as described and shewn in a stove or other apparatus for
burning fuel whereby the draught is drawn down through the firo taking the smoke
with it, consuming it in its passage.
2. The construction as described and shewn for supplying air to the combustion
products after they have passed through the fire.
3. In a boiler or furnace the trap door D for reversing the draught and the small
door B for preventing admission of air to the bottom of the fire.
4. The smoke consuming or fuel saving apparatus precisely as described and
shewn.
5. A fuel consuming apparatus in which the draught is reversed after being lighted
precisely as described and shewn.