Improvements in Apparatus for Heating Air.
Year: 1889

page_text: Date of Application, 25th Sept, 1889
Complete Spécification Left, 19th June, 1890-Accepted, 19th July, 1890
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PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Heating Air.
1, SAMUEL BEVN of Jundiahy, Province of S. Paulo, in the Empire of Brazil;
Mechanical Engineer, do hereby declare the nature of this invention to; be as
follows:-
:.
My invention relates to apparatus for heating large volumes of air for use for
industrial purposes and for warming rooms, the object being chiefly to effect an
economy in the consumption of fuel.
In carrying out my invention I construct the air heating apparatus with two, or
more stacks of fire-clay tubes the said stacks being placed side by side. The air to be
heated is forced by a blower (a screw blower by preference) between the tubes. The
heat from the furnace enters the tubes at a point the farthest from the blower and
leaves at the point nearest to it.
The furnace is constructed of brick, with a vertical flue at the back, communicating
with one stack or set of the said fire-clay tubes placed longitudinally over the furnace.
The heat and product of combustion from the furnace pass upwards through the said
flue and enter the first set of tubes from which they are conducted by a flue to the
second stack of tubes placed alongside the first, and next to the blower and from these
tubes they escape into the chimney.
The air to be heated is forced by the screw-blower through spaces. between the fire-
clay tubes and comes first in contact with the stack of tubes nearest the blower and
afterwards in contact with the other stack of tubes. It then leaves in a heated
condition through a large funnel shaped opening whence it is conducted to the place
where it is required for use.
At the back of the furnace, and near the ground, there is a sliding plate covering a
Alue communicating with the hereinbefore described flue at the point where the fire
enters it. The object of this flue is to allow of introducing air to assist combustion, or
of introducing it in sufficient quantities to lower the temperature.
There is a damper in the chimney which is used in conjunction with a register for
regulating the heat.
By my arrangement of tubes, the maximum amount of heat from the fire is utilized
in heating the air, that which escapes by the chimney being barely sufficient to
create a draught, and by the use of tubes of fire-clay instead of iron I obtain
greater durability and radiating power; moreover the heat emanating from
them is more agreeable and less injurious to health than that radiated from
iron tubes.
I find it most advantageous to use a screw-blower as it gives the largest volume of
air with the least expenditure of power.
).
COMPLETE SPECIFICATION.
Improvements in Apparatus for Heating Air.
I, SAMUEL BEVN, of Jundiahy, Province of S. Paulo, in the Einpire of Brazil,
Mechanical Engineer, 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 :-
My invention relates to apparatus for heating large volumes of air for use for
industrial purposes and for warming rooms, the object being chiefly to effect an

page_text: In carrying out my invention I construct the air heating apparatus with two or
more stacks of firo-clay tubes, the said stacks being placed side by side. The air to be
heated is forced by a blower (a screw blower by preference) between the tubes, while
the heat from the furnace enters the tubes at a point the farthest from the blower and
leaves at the point nearest to it.
-
In order to enable my invention to be fully understood 1 will describe how it can
be carried into practice by reference to the accompanying drawing, in which :
Figure 1-is a front elevation of an air-heating apparatus constructed according to
my invention;
Figure 2 is a plan of the same.
Figure 3 is a vertical section on the line A B of figure 2.
Figure 4 is a horizontal section on the line CD of figure 3.
Figure 5 is a vertical section on the line E F of figure 4.
Figure 6 is a vertical section on the line G H of figure 4; and
Figure 7 is a horizontal section on the line I J of figure 3.
Similar letters in all the figures indicate similar parts.
C
a is the furnace constructed of brick, with a vertical flue b at the back, c and d are
the stacks or sets of fire-clay tubes placed side by side and arranged longitudinally
over the furnace a, the said flue & communicating with one end of the stack c which
is in communication with the other stack d by means of a flue e.
is the blower for forcing the air to be heated between the tubes c, d in a direction
at right angles to that of the passage of the heat through the tubes as indicated by the
arrows in figure 4.
The heat and products of combustion from the furnace a pass upwards through the
flue and enter the first set of tubes c from which they are conducted by the flue e to
the second stack of tubes d placed alongside the first, and next to the blower, and
from the tubes & they escape into the chimney g.
The air to be heated is forced by the screw-blower through spaces between the
fire-clay tubes and comes first in contact with the stack of tubes d nearest the
blower and afterwards in contact with the other stack of tubes c. It then leaves
in a heated condition through a large funnel shaped opening whence it is conducted
to the place where it is required for use.
At the back of the furnace, and near the ground, there is a sliding plate covering
a flue & communicating with the flue b at the point where the fire enters it. The
object of the flue k is to allow of introducing air to assist combustion, or of introducing
it in sufficient quantities to lower the temperature.
There is a damper (not shewn in the drawing) in the chimney g which is used
in conjunction with a register (also not shown) for regulating the heat.
By my arrangement of tubes, the maximum amount of heat from the fire is
utilized in heating the air, that which escapes by the chimney being only just
sufficient to create a draught, and by the use of tubes of fire-clay instead of iron I
obtain greater durability and radiating power; moreover the heat emanating from
them is more agreeable and loss injurious to health than that radiated from iron
tubes.
I find it most advantageous to use a screw-blower as it gives the largest volume
of air with the least expenditure of power.
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 apparatus for heating air tho use of stacks of fire-clay tubes arranged
substantially in the manner hereinbefore described and illustrated in the accompanying
drawing.
2. An apparatus for heating air having two or more stacks of tubes placed side
by side, a blower for supplying the air to be heated, and a furnace, the air from the
blower passing between the tubes while the heat from the furnace enters the tubes at

page_text: a point the farthest from the blower and leaves at the point nearest to it, substan-
tially as hereinbefore described.
The improved apparatus for heating air berein before described and illustrated
in the accompanying drawing.
T1
3.5
201 1000
SAMUEL BEVN.
Witnesses-
THOMAS MARKS PLAK,
ALLEN BAGGOTT,
Jundiahy.
G. F. Redfern & Co.,
Agents for the Applicant.