An Improved Smoke-consuming Stove.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improved Smoke-consuming Stove.
I, ALEXANDRE LACOLLE, of 17, Boulevard de la Madeleine, Paris, in the
Republic of France, Retired Inspector of Assessed Taxes, do hereby declare the
nature of this invention to be as follows:-
This invention relates to an improved smoke-consuming stove by the aid of
which the production of carbon monoxide is avoided as well as that of deleterious
gases. This stove effects a very great economy in fuel and affords a very regular
heat. Moreover the feeding of the fire is effected, without opening of the fire-
box, by means of a kind of door or slide placed at the lower part of an internal
fuel-magazine which thus prevents any exit of smoke or gas into the room at the
moment of replenishing the fire with fuel. The cleaning of the grate is effected
by means of a kind of screw operated from the exterior and also without it being
necessary to open the door of the ash-pit.
My invention will be readily understood from the following description with
reference to the accompanying specimen drawing, in which
Figure 1 shows the exterior of the improved stove.
Figure 2 shows the same stove in vertical central section.
Figure 3 shows in plan, separately, the door or slide of the internal magazine
of fuel, seen on the line 1-2, Figure 2.
Figure 4 shows, separately, in plan seen on the line 3-4, Figure 2, the internal
dome of the stove on which slides the door or slide of the magazine;
Figure 5 shows the central parts of my stove in horizontal section on the
line 5-6, Figure 2.
Figure 6 shows in plan on the line 7-8, Figure 2, the central lower grate of
the fire-box.
In these various figures, like letters of reference indicate corresponding parts.
As shown in this drawing, my improved stove is provided at the lower part of
the fire-box, which is formed of a cylindrical grate, with another grate b slightly
depressed or dished and serving to support the charge of fuel. This grate, formed
as shown separately in Figure 6, of the drawing, is provided beneath with two
screws c, the projections of the threads whereof engage between the bars and are
provided with recesses g to move or stir the fuel, as shown in Figure 2. These
screws are provided with extensions or stems d which are provided at their end
with a controlling handle e which it is only necessary to turn alternately from
right to left in order that the threads of the screw shall disengage and throw
down the cinders or clinkers between the bars. If it be desired to free the grate,
at a single operation, from all the fuel, it is only necessary to disengage the
retaining hooks f and to draw the screws outwards. The cinders or clinkers
fall into an ash-pit closed by a tightly-sealed door h provided with a handle i
for grasping it and for moving a valve serving to regulate the entrance of the
air necessary for combustion.
Above the cylindrical grate a there is a cast washer h¹ serving to support the
fire-bricks or pieces i placed one above the other and alternated up to the piece

page_text: l
which forms the dome. These bricks are made with a hollow central part and are
of polygonal form, hexagonal, for example, at their periphery, with projections
and re-entrant parts. Towards the interior, at the position of the projections,
these bricks are provided with recesses j into which open channels k. These
bricks are all placed one on the other with the projections and the re-entrant
parts alternating, as shown in Figures 2 and 5 of the drawing, and the whole is
maintained in position by a sheet metal cylinder provided with the smoke-out-
let m, Figure 2. Above the last brick i, there is a dome n, of fire-clay, its
base o is polygonal like the bricks, but its upper part 2 is cylindrical and
hollowed out at its centre. All the fire-bricks can be in a single piece or in several
parts which fit together. On the cylindrical part of the dome n there is a groove g,
see Figures 3 and 4, in which slides a door, which is in two parts r, or can be
made in a single piece, preferably of fire-clay.
The two parts of this door or slide are moved by means of rods s and handles t.
The door or slide just mentioned closes a funnel-shaped magazine u, in which
is placed the fuel for feeding the fire-box. Above the magazine there is a
cover fitting into a ring a provided with a channel y for receiving sand serving
to form a tight joint.
The cover v, which effects the closure of the sheet metal cylinder 1, is jointed
at z to the ring and the latter is fixed to the upper part of the said cylinder
which also retains the magazine u and the dome n in position, and forms at the
same time a smoke-box. The external casing 1 of my improved stove is mounted
on a closed base 2, and receives a head 3 comprising an inlet 4 receiving a cover 5
jointed at 6. This casing can be formed with a metallic frame or skeleton so
as to receive any suitable panels 7, which may be either solid or perforated, and
are preferably formed of ceramic ware. Finally, the stove can be ornamented
in any desired manner,
In my improved stove, a true distillation of the fuel is produced, the hot gases
as well as the products of combustion follow the path indicated by the arrows in
Figure 2 of the drawing, meet the dome n, then passing between the bricks i and
the sheet-metal cylinder 1, these gaseous residues escape through the conduit m
leading to the chimney. The arrangement of the conduits j, k and the nature
of the bricks contribute to the smoke-consuming capacity of the system, and by
the increase of the heating surface, and by the storage of the heat, in the fire-
clay, which, in the event of slackening of the draught, cause a true means of
restitution and regulation.
The construction of my improved stove can obviously be somewhat modified with-
out departing from the nature of my said invention.
Dated this 30th day of November 1898.
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicant
I, ALEXANDRE LACOLLE, of 17, Boulevard de la Madeleine, Paris, in the
Republic of France, Retired Inspector of Assessed Taxes, do hereby declare 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:-
This invention relates to an improved smoke-consuming stove by the aid of
which the production of carbon monoxide is avoided as well as that of deleterious

page_text: gases. This stove effects a very great economy in fuel and affords a very regular
heat. Moreover the feeding of the fire is effected, without opening of the fire-
box, by means of a kind of door or slide placed at the lower part of an internal
fuel-magazine which thus prevents any exit of smoke or gas into the room at the
moment of replenishing the fire with fuel. The cleaning of the grate is effected
by means of a kind of screw operated from the exterior and also without it being
necessary to open the door of the ash-pit.
My invention will be readily understood from the following description with
reference to the specimen drawing left with my Provisional Specification, in
which:
Figure 1 shows the exterior of the improved stove.
Figure 2 shows the same stove in vertical central section.
Figure 3, shows in plan, separately, the door or slide of the internal magazine
of fuel, seen on the line 1-2, Figure 2.
Figure 4 shows, separately, in plan seen on the line 3-4, Figure 2, the internal
dome of the stove on which slides the door or slide of the magazine;
Figure 5 shows the central parts of my stove in horizontal section on the
line 5-6, Figure 2.
Figure 6 shows in plan on the line 7-8, Figure 2, the central lower grate of
the fire-box.
In these various figures, like letters of reference indicate corresponding parts.
As shown in this drawing, my improved stove is provided at the lower part of
the fire-box, which is formed of a cylindrical grate, with another grate b slightly
depressed or dished and serving to support the charge of fuel. This grate, formed
as shown separately in Figure 6, of the drawing, is provided beneath with two
screws c, the projections of the threads whereof engage between the bars and are
provided with recesses g to move or stir the fuel, as shown in Figure 2. These
screws are provided with extensions or stems & which are provided at their end
with a controlling handle e which it is only necessary to turn alternately from
right to left in order that the threads of the screw shall disengage and throw
down the cinders or clinkers between the bars. If it be desired to free the grate,
at a single operation, from all the fuel, it is only necessary to disengage the
retaining hooks f and to draw the screws outwards. The cinders or clinkers
fall into an ash-pit closed by a tightly-sealed door provided with a handle i
for grasping it and for moving a valve serving to regulate the entrance of the
air necessary for combustion.
Above the cylindrical grate a there is a cast washer ¹ serving to support the
fire-bricks or pieces placed one above the other and alternated up to the piece
which forms the dome, These bricks are made with a hollow central part and are
of polygonal form, hexagonal, for example, at their periphery, with projections
and re-entrant parts. Towards the interior, at the position of the projections,
these bricks are provided with recesses j into which open channels k. These
bricks are all placed one on the other with the projections and the re-entrant
parts alternating, as shown in Figures 2 and 5 of the drawing, and the whole is
maintained in position by a sheet metal cylinder provided with the smoke-out-
let m, Figure 2. Above the last brick i, there is a domen of fire-clay, its
base o is polygonal like the bricks, but its upper part 2 is cylindrical and
hollowed out at its centre. All the fire-bricks can be in a single piece or in several
parts which fit together. On the cylindrical part of the dome n there is a groove q,
see Figures 3 and 4, in which slides a door, which is in two parts r, or can be
made in a single piece, preferably of fire-clay. This door serves only for the
introduction of the fuel; it is thus only open at the moment of this introduction
of fuel and it is closed immediately the said charge of fuel has fallen into the
furnace.
The two parts of this door or slide are moved by means of rods s and handles t.
The door or slide just mentioned closes a funnel-shaped magazine u, in which
is placed the fuel for feeding the fire-box. Above the magazine there is a

page_text: cover fitting into a ring & provided with a channel y for receiving sand serving
to form a tight joint.
The cover v, which effects the closure of the sheet metal cylinder l, is jointed
at to the ring and the latter is fixed to the upper part of the said cylinder 7
which also retains the magazine u and the dome n in position, and forms at the
same time a smoke-box. The external casing 1 of my improved stove is mounted
on a closed base 2, and receives a head 3 comprising an inlet 4 having a cover 5
jointed at 6. This casing can be formed with a metallic frame or skeleton so
as to receive any suitable panels 7, which may be either solid or perforated, and
are preferably formed of ceramic ware. Finally, the stove can be ornamented
in any desired manner,
In my improved stove, the mixture with air, of the gases contained in the
fuel, takes place in the interior of the furnace of refractory clay where it produces
a true distillation of the fuel. The mixture of air and gases can only take place
in this furnace since the washer h¹, which separates it from the grate a, closes
the entrance, at the lower end, to the space existing between the interior of the
said furnace and the sheet iron cylinder. The hot gases as well as the products
of combustion follow the path indicated by the arrows in Figure 2 of the drawing,
meet the dome n, then passing between the bricks and the sheet-metal cylinder 7,
these gaseous residues
escape through the conduit m leading to the chimney. The
gases and the air, thus mixed, produce the maximum heat which each kind of
fuel can give, and they only redescend to the outlet m after having given up the
greater part of this heat. In any case, they cannot, redescend to the grate and
pass out again at the door of the stove; this obviates all the disadvantages of slow
combustion stoves where the carbon monoxide and the carbonic acid are often
driven back and escape into the apartments or places heated. The arrangement
of the conduits j, k and the nature of the bricks contribute to the smoke-consuming
capacity of the system, and by the increase of the heating surface, and by the
storage of the heat in the fire-clay, which, in the event of slackening of the
draught, causes a true means of restitution and regulation.
The construction of my improved stove can obviously be somewhat modified
without departing from the nature of my said invention.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. A stove with internal brickwork serving to store up the heat, this brick-
work, which is surrounded by a cylinder of sheet metal closed at the upper part,
being formed and characterised by refractory bricks having a central hollowed
out part and having a polygonal form on their periphery, the said bricks being
alternated in such a manner that the mixture of hot air and gases of combustion
will circulate in the conduits of the bricks and in the passages or flues produced
by the form and arrangement of these bricks relatively to each other and to the
sheet metal cylinder, and will give up its heat to the bricks before reaching the
chimney.
2. The improved means for feeding the stove with fuel, comprising a magazine
arranged in the upper part of the said stove and provided with a door or slide at
its lower part, substantially as, and for the purposes, hereinbefore described.
3. The improved stove constructed substantially as herein before described with
reference to the accompanying drawing, for the purposes specified.
Dated this 8th day of August 1899
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicant