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Патент USA US2411324

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Nov. 19, 1946.
c. 1... GAGNON
Filed Oct. 2, 1944
K/ 9
C?ar/és L. (59572022
Patented Nov. 19, 1946
Charles L. Gagnon, Green Bay, Wis.
ApplicationOctober 2, 1944, Serial No. 556,821
5 Claims. (Cl. 126-83)
' 1
This invention relates generally to the class of '
stoves and furnaces and pertains particularly to
an improved fuel burner unit which is designed
to effect a more thorough combustion of the fuel.
The principal object of the present invention is
to provide a device designed for installation in a
furnace structure, which is designed to regulate
the flow of air through the burning fuel in such
a manner as to thoroughly-consume the fuel and
responding parts throughout the several views,
the numeral l0 generally designates a furnace
structure of conventional design in which the fuel
combustion chamber is designated II.
In the lower part of the combustion chamber
is a conventional grate l2 above which is located
the usual upwardly ?aring ?re-pot I3. The
chimney pipe or lead-off for the products of com
bus'tion is indicated at I4‘ while the conventional
consequently obtain therefrom the maximum of 10 fuel admission door opening and door covering the
4 heating action.
same are designated l5 and I6 respectively.
Another object of the ‘invention is to provide a
In accordance with the present invention there
device for installation in the ?re-box of a furnace,
is provided a cylindrical structure in the form of
"which is formed to provide a fuel receivingrecep
a truncated cone which is generally designated
tacle and combustion chamber which is con 15 ll. ‘This might be de?ned as a dome which'has
structed in a novel manner to cause the combus
a base circumference the same as the circum
tion supporting?air to be circulated in a noyel
ference of the top of the ?re-pot l3 upon which it
manner through the fuel and through a heat ra
diating drum before the products of combustion
The dome I] may be formed in two sections or
pass off to the chimney, thereby effecting an ab 20 more asdesired to facilitate its installation in the
sorption of the fuel heating‘ units to a greater ex
‘?re-box or combustion chamber of the furnace,
tent than would be the case if the fuel were con
such sections being secured together by bolts or
sumed in the usual open ?re-box of the furnace
other ‘suitable means.
Formed through the wall of the dome l1 and
Other objects and advantages of the ‘invention
extending through a substantial portion of‘the
will become apparent as the description of the
circumference of the unit, is a door opening which
same proceeds, and the invention will be best un
is located in the set-up structure adjacent to the
derstood from a consideration of the following de
furnace opening [5, such door or fuel admission
tailed description taken inrconnection ‘with the
accompanying drawing forming a part of the
specification, with the understanding, however,
that the invention is not con?ned to a strict con
formity with the showing of the drawing but may
be changed orv modi?ed so long as such changes or
modi?cations mark no material departure from
the salient features of the invention as expressed
in the appended claims.
In the drawing;
opening being designated, l8.
Adjacent to the bottom edge of the dome is the
guide ?ange IS in which is‘slidably engaged the
bottom edge ?anges 20 of the two sliding doors
2 I. ‘Each of these doors has formed therethrough,
draft openings 22 controlled by the usual control
or damper plate 23. The draftv openings are so
located in the sliding doors that they willbe oppo
site the door opening l5 when the sliding doors 2|
are in closed position.
Figure 1 is a vertical sectional view through a
furnace and a structure installed therein, con
structed in accordance with the present inven
Disposed vertically within the dome is an im
40 perforate ?ue cylinder 24, at the‘top edge of which
is the outwardly projecting ‘surrounding flange
25 which engages over the top edge of the dome
Figure 2 is a partial horizontal section taken
unit i1 so that the cylinder hangs from the dome
on the line 2--2 of Figure 1.
unit. ‘The cylinder is of a length to extend a sub
Figure 3 is a view in front elevation of the hood 45 stantial distance downwardly into the ?re-pot
or truncated cone per se.
l3_ but terminates a substantial distance above the
Figure 4 is a horizontal section taken on the
grate I! so that fuel introduced into the dome and
line 4-4 of Figure 3.
fire-pot may ?ow under the lower end of the cyl
Figure 5 is a detail section on an enlarge
inder across the grate, to the center of the fire
scale through a portion of the upper end of the 60 pot.
Figure 6 is a view in top plan of the portion of
the structure‘ sl: own in section in Figure 5.
Referring now more particularly to the drawing
wherein like numerals of reference indicate cor
Disposed concentrically within the cylinder 24
is an inner cylinder 26 which is of substantially
the same length as cylinder 24 and is perforated
throughout as indicated at 21. The cylinder 26 is
of materially less outside diameter than the in
terior diameter of the cylinder 24 and the two
cylinders are maintained in spaced parallel rela
doors 23 carried by the sliding doors 2| or addi
tional air can be admitted by opening the usual
draft control 36, on the door it, together with the
tion, vby the spacer blocks 23 carried upon the
outer wall of the cylinder 23, and suitable screws
draft control member 23. If a check of the com
or bolts 23 which are passed through the Wall Of
bustion is desired this can be effected in the usual
the outer cylinder 24 and into the blocks.
manner of opening the draft control means, not
The upper end of the inner perforated cylinder
shown, carried by the door It and keeping the
26 is closed by the perforated head or top plate
draft controls 23 closed so that air comin‘ in
30. This head is peripherally ?anged as indi
through the opening l5 will ?ow directly upw rd
cated at 3| and such ?ange extends into the up 10 ly into the upper part of the combustion chamber
per end of the cylinder 26 to maintain the head in
and thus reduce the suction through the grate.
proper position.
The device of the present invention not only
Supported by the top of the cylinder 24, is an
functions to effect the more complete combustion _
upwardly and outwardly ?aring sectional unit 32,
of the fuel 50 as to extract therefrom the maxi
which is of circular form and which comprises a 15 mum of heat units, but it also prevents chimney
lower annular neck portion 33 which merges with
?res, eliminates clinkers and back-?ring, and
the upwardly and outwardly extending or ?aring
minimizes black smoke in the chimney or stack.
portion 34. The annular portion 33 of this unit
The device has been illustrated in a conven
?ts tightly into the upper end of the cylinder 24
tional type of hot air heating furnace but it is'to
and the ?aring portion 34 extends upwardly an 20 be understood that it is not con?ned to such
outwardly in the ?re-box as shown.
use but may be used in any type of furnace where
it is found applicable.
The top edge of the ?ared unit 32 lies relatively
I claim:
close to the top of the ?re-box H and as will be
readily seen upon reference to Figure 1', the dome
1. In a furnace structure having a ?re-box or
extends upwardly and centrally across, but is 25 combustion chamber, a ?re-pot therein, a door
spaced from, the inner end of the chimney pipe I4.
opening leading into the chamber and a smoke
Thus it will be seen thatvthe smoke and gases
pipe leading from the chamber; a truncated cone
from burning fuel cannot ‘?ow directly from the
of hollow form open at its top and‘ bottom, hav
?re-bed to the chimney but must pass up through
ing the bottom resting against the top edge of the
the perforated cylinder 26 and cylinder 24 and 30 ?re-pot. the cone extending upwardly in the
through the ?ared unit and spread out under the
chamber, a door opening in said cone, a door for
top or roof of the combustion chamber and then
closing said door opening, a cylindrical unit
?ow downwardly across the outer side of the unit
connected at one end withthe smaller end of the
and the dome before passing to the chimney.
cone and extending downwardly through the cone
It will be readily understood that the various 35 into the fire-pot, and means mounted upon the
parts of the present device will, for convenience
top of the cone forming an upwardly and out
of installation, be formed in sections, as illus
wardly ?aring de?ector, said cone extending above
trated, adapted to be coupled together as the sec
the level of the smoke pipe and the door opening
tions are assembled.
of the cone being disposed opposite the door open
As will be readily apparent from the illustra 40 ing leading into the combustion chamber.. .
tion, fuel will be charged into the ?re-pot through
2; A structure as set forth in claim 1, in which
the door opening I5 and through the opening l8 ' the cylindrical unit comprises a pair of spaced
of the structure forming the present invention, to
parallel cylindrical bodies, the outer one of said
fill the space between the ?re-pot l3, the dome I ‘I
bodies being imperforate and the inner one of the
and the cylinder 24.
bodies being perforated.
When the fuel is introduced it will be caused to
move centrally in the ?re-pot by the inclined or
slanted ?re-pot wall and as the fuel is burned
3. A structure as set forth in claim 1, in which
the said cylindrical unit comprises two spaced
parallel cylindrical bodies of a length greater
from beneath the top layers will naturally drop
than the height of the cone, the outer one of the
and be urged toward the center of the ?re-pot by 60 cylindrical bodies being .imperforate and con
reason of the inclined wall and also from the
nected at one end with the top edge of the cone.
effect of the down draft.
the inner one of the cylindrical bodies being per
When the fuel is charged into the furnace it
it directed on each side of the cylinders and with
4. A unit for installation in a furnace structure
enough force that, because of the circular form 55 comprising a hollow truncated conical body open
of the burner and ?re-pot, it will be forced to
at its ends, a cylindrical unit of greater length
move around the cylinders so as to ?ll the ?re-pot
than said body and comprising spaced inner and
outer cylinders, the outer cylinder being imper
forate and the inner cylinder being perforated.
that the fuel can be readily distributed around 60 the outer cylinder having a ?anged end engaging
the cylinders and thus, with the fuel being forced
over the edge of the smaller end of the body, and
to move inwardly as it drops in the ?re-pot, there
a circular upwardly and outwardly ?aring de
From the foregoing it will be readily apparent
will always be a sumcient quantity in the center
of the grate for the production‘ of a good bed of
live coals. Even if there were no fuel in the cen .65
ter of the grate there would be su?icient amount
of live embers or coals toward the side and by virtue of the down draft these would be drawn I
centrally and inwardly.
?ector connected with the ?anged end of the im
perforate cylinder.
5. A structure as set forth in claim 4, in which
the de?ector unit comprises an annular bottom
portion designed for insertion into the upper end
of the imperforate cylinder, and an upwardly and
outwardly extending top portion projecting a sub
Recirculation of some of the gases and prod 70 stantial distance above and beyond the ?anged
nets of combustion through the fuel and to the
end of the imperforate cylinder.
fire-bed may be effected by opening the draft
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