An Improved Air-heating Stove.
Year: 1898

page_text: Date of Application, 21st Mar, 1898-Accepted, 14th Jan., 1899
An Improved Air-heating Stove.
I, CARL GUSTAF NILSSON, of 30, Wallgatan, Gothenburg, in the Kingdom of
Sweden, Builder, 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 arrangement of such heaters as have a mantle or outer
shell consisting of tiles or the like while its interior parts (a stove or iron-furnace,
circulating pipes, etc.) are of iron, and it consists in so arranging the said iron parts
in the mantle and so uniting them to the latter and to one another that they will not
disturbingly influence the mantle, when changes of volume take place owing to
irregular heating, and at the same time will be easy to remove from the mantle for
cleaning or other purpose and again easily replaced.
accompanying drawing
Fig. 1 shows the heater in vertical section.
Fig. 2 is a front elevation of the heater.
Figs. 3 to 7 are horizontal sections on the lines A-B, C--D, E-F, G-H,
and I-K respectively of Figs. 1 and 2.
In Fig. 1 the mantle A¹ of the heater is indicated by heavy cross-hatching, and
inside of said mantle the stove or iron-furnace B¹ is visible. The former is divided
by partitions a, b, c and d into four chambers I, II, III, IV at different heights, the
bottom chamber I, into which the air of the room can enter through lateral apertures f,
being in communication with the top chamber IV through a number of pipes m
arranged in a circle at some distance from one another, and the bottom chamber I
being connected with the smoke-outlet h¹ directly below the partition c by means of
a passage g-h provided with a regulating damper g¹. In the chamber II, which may
be termed the heating chamber, there is located the iron-furnac eB¹ with the grate i,
combustion-chamber with lateral openings ¹ forming an outlet for the products of
combustion, the fuel-magazine formed of tubular sections placed on top of each
other, and the cover at the top. The latter can be removed through the door a¹
in the mantle, when fuel is to be filled into the furnace. In the chamber III, the
smoke-chamber, there is an opening o leading to the smoke-outlet h¹, at the point
where the flue h communicates with the latter, and a sweep hole n. In the partition b
is an opening 8 for the gases of combustion. The chamber IV, the hot-air or
circulating chamber, at the top of the heater embraces the upper ends of the circu-
lating pipes m and is provided in front with the valve communicating with the
room and at the back with a damper-opening p leading to the chimney-flue. The
top partition d is covered with a layer of bricks, tiles or the like. The partitions a, b, c
are made in two parts and rest on flanges or in rings inserted in the mantle, so that
they can be easily applied in their places or be removed and are free to expand or
contract, according as the heat increases or diminishes, without coming in contact
with the mantle A¹, the formation of cracks in the latter being thus avoided. The
pipes m also have a joint in one place and the parts of the furnace are so arranged
on top of each other that they as well as the former can be removed, and replaced.
The air needed for the combustion rises from the ash-pan e to the furnace whence the
In the latter as well
hot gases pass through the openings into the chamber II.
Fig. 1 shows the heater in vertical section.
Fig. 2 is a front elevation of the heater.
Figs. 3 to 7 are horizontal sections on the lines A-B, C-D, E-F, G-H,
and I-K respectively of Figs. 1 and 2.
In Fig. 1 the mantle A¹ of the heater is indicated by heavy cross-hatching, and
inside of said mantle the stove or iron-furnace B₁ is visible. The former is divided
by partitions a, b, c and d into four chambers I, II, III, IV at different heights, the
bottom chamber I, into which the air of the room can enter through lateral apertures f,
being in communication with the top chamber IV through a number of pipes m
arranged in a circle at some distance from one another, and the bottom chamber I
being connected with the smoke-outlet h¹ directly below the partition c by means of
In the chamber II, which may
a passage g-h provided with a regulating damper g¹.
be termed the heating chamber, there is located the iron-furnac eB¹ with the grate i,
combustion-chamber with lateral openings ¹ forming an outlet for the products of
combustion, the fuel-magazine formed of tubular sections placed on top of each
other, and the cover 11 at the top. The latter can be removed through the door a¹
in the mantle, when fuel is to be filled into the furnace. In the chamber III, the
smoke-chamber, there is an opening o leading to the smoke-outlet h¹, at the point
where the flue h communicates with the latter, and a sweep hole n. In the partition b
is an opening 8 for the gases of combustion. The chamber IV, the hot-air or
circulating chamber, at the top of the heater embraces the upper ends of the circu-
lating pipes m and is provided in front with the valve communicating with the
room and at the back with a damper-opening p leading to the chimney-flue. The
top partition & is covered with a layer of bricks, tiles or the like. The partitions a, b, c
are made in two parts and rest on flanges or in rings inserted in the mantle, so that
they can be easily applied in their places or be removed and are free to expand or
contract, according as the heat increases or diminishes, without coming in contact
with the mantle A¹, the formation of cracks in the latter being thus avoided. The
pipes m also have a joint in one place and the parts of the furnace are so arranged
on top of each other that they as well as the former can be removed, and replaced.
The air needed for the combustion rises from the ash-pan e to the furnace whence the
hot gases pass through the openings into the chamber II. In the latter as well

page_text: as in chamber III the gases flow around and heat the pipes m and finally pass off
through o and h¹. The air in the pipes m is set in motion by the current from f
and, being heated during its passage through the pipes, passes back into the room
through the upper valve r.
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. In heaters with air-circulation, composed of an outer mantle (A¹) of tiles or the
like inside of which is placed a stove or iron-furnace surrounded by vertical circulat-
ing-pipes (m), the arrangement that the mantle is divided into several chambers at
different heights by means of partitions (a, b, c) made in two or more parts and
freely resting on flanges situated at the inner walls of the mantle, and that the
pipes (m), which pass through the partitions, as well as the stove or iron-furnace
are composed of sections easily detachable from one another so that they as well as
the partitions can be easily removed and replaced, while at the same time the mantle
is affected to the smallest possible extent by the changes of volume of said parts
when heated differently.
2. In a heater arranged as stated in Claim 1, the arrangement that the said heater
by means of the partitions (a, b, c) is divided into four chambers (I, II, III, IV) at
different heights, the bottom chamber being in cominunication with the top chamber
by means of the pipes (m), the chamber (II), adjoining the bottom one, containing
the stove or iron-furnace, and the chamber (III) next to the top one being in com- .
munication with chamber (II) through an opening (8) in the partition (b) and having
an aperture (o), leading to the smoke-outlet, and a sweep-hole (n).
Dated this Twenty-first day of March 1898
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.