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Патент USA US2136317

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2,136,317
Patented Nov. 8, 1938
UNITED STATES
PATENT OFFICE
2,136,317
OIL BURNING FURNACE
Cominardo Rialdini, Philadelphia, Pa.
Application November 18, 1937, Serial No. 175,315
3 Claims. (Cl. 158-91)
This invention relates to the class of stoves
and furnaces and pertains particularly to an im
proved oil burning heater or furnace.
The primary object of the present invention
5 is to provide an improved oil burner stove or
furnace in which novel means is employed for
effecting the complete combustion of the fuel
oil whereby the maximum of ‘heat value will be
obtained from the fuel.
Another object of the invention is to provide
110
an oil burning furnace wherein novel means is
employed for introducing air for mixture with
the vaporized oil whereby complete combustion
of the fuel is obtained and a minimum of car
bon deposit results.
A still further object of the invention is to
provide a novel- oil burner structure in which a
combined ?re pot and water jacket unit is em
ployed which serves the double function of pro
20 viding a receptacle in which the oil is vaporized
and means for supplying domestic hot water in
addition to the water heated in the unit for the
usual heat radiating purposes.
The invention will be best understood from
26 a consideration of the following detailed descrip
tion taken in connection with the accompanying
drawing forming part of this speci?cation, with
the understanding, however, that the invention is
not con?ned to any strict conformity with the
.30 ‘showing of the drawing but may be changed or
modi?ed so long as such changes or modi?cations
mark no material departure from the salient fea
tures of the invention as expressed in the ap
pended claims,
In the drawing:
Figure 1 is a view in vertical section thru a
heating structure built in accordance with the
present invention.
Fig. 2 is a view in bottom plan of the central
40 portion of the air chamber of the heater per se.
Referring now more particularly to the draw
ing, the numeral I generally designates the fur
nace wall which is here shown as being divided
into- an upper double-walled water cell unit 2
and a lower hollow unit 3 which constitutes
shell 2 so as to carry oif the heated water to
radiators or other units and any suitable means
may be employed for returning the water to
the unit 2, as for example, thru the domestic_
water heating portion of the furnace structure =-5
which will be hereinafter more fully described.
Disposed in the central part of the furnace
casing is a unit in the form preferably of a cast
ing which is generally indicated by the numeral _ v
8 and which as shown has an outer vertical wall ‘10
portion 9 which is closed by the bottom wall I0
and which has within its upper portion the ?re
pot II. This pot has its wall downwardly taper
ing, and is joined integrally with the trans
verse wall or web I2, while its top edge is joined ‘15
with the outer wall 9 by the short web l3,\thus
forming the closed area I4 which constitutes
a water jacket around the ?re pot.
Any suitable means may be employed for sup
porting the unit 8 within the furnace structure, ‘20
such as the legs l5 which maintain the bottom
ID a substantial distance above the ?oor 16 upon
which the furnace stands. This bottom: I!) of the
unit is provided with a central opening I‘! and
a cover plate I8 is secured to the lower face of ‘‘25
the bottom by the screws l9, by which it may be
adjusted relative to the opening so as to regu
late the ?ow of air thru the opening, as herein
after described.
The wall 9 of the unit 8 has connected there
with an air inlet pipe 20, by means of which air
is supplied to the chamber 2! which is located
beneath the ?re pot. Extending thru the air
pipe or conduit 29 is a main oil supply pipe 22
and a smaller pipe 23 which conducts gas to a '35
pilot nozzle located within the ?re pot, indicated
by the numeral 24.
.
The bottom wall of the ?re pot II is raised
at its center and has an opening 25 therethru V
which is surrounded by an upstanding collar "40
26. Engaging over the collar 26 and resting upon
the bottom of the ?re pot is an upwardly extend~
ing air tube 21, the upper end of which opens
into a hollow sphere 28. This tube is provided
with a lower and an upper circular series of air :45
an insulation structure, invthat the interior of
inlet openings 29 and the sphere is also pro
the unit has only air therein which serves as
an insulation medium. The furnace structure
as a whole is preferably of circular cross-section
vided with air inlet openings 30 which are ar
ranged in a circle or in circles in a horizontal
50 and the water unit 2 has the integral domed top
4 thru the central part of which a passageway
5 is formed for the escape of products of combus
tion. In this passageway may be secured the
end of a flue pipe 6.
Pipes 1 are coupled with the outer wall of the
plane above the top edge of the ?re pot.
The pilot pipe 23 extends upwardly thru the
opening 25 and then later-ally thru the wall
of the air pipe 2‘! and terminates near the bot
tom of the ?re pot and in relatively close prox
imity to the side wall thereof. The terminus of
the pilot pipe is also preferably located near ‘36
2"
2,136,317
the inlet end of the oil pipe 22 so that oil enter
ing thru the pipe 28 will be immediately ignited.
Disposed exteriorly of the furnace structure is
a receptacle 3! and this receptacle is connected
at its top and bottom with the water jacket or
water-?lled area I4 surrounding the ?re pot,
by the pipes 32 and 33 which, as shown, connect
respectively with the top and bottom portion of
the receptacle [4. An outlet pipe 35 is connected
10 with the top part of the receptacle 3| and a
cold water inlet 36 extends thru the top of the
receptacle to a point adjacent the bottom there
25
30
v35
that in addition to providing a novel means for
e?iciently consuming oil for heating fuel pur
10
poses, the invention provides a novel means for
be employed for returning cooled water to the
cell 2 after it has passed thru radiating units,
and such means may consist of a pipe coupled
domestic or for radiation purposes.
into the lower part of the unit 2. In installa
tions where the domestic water heater 3| is not
desired, the unit I4 may be employed as a booster
for the heating system and in this case the
upper part of this unit may be coupled with the
water jacket 2 by a suitable pipe, as illustrated
in clotted outline and indicated by the numeral
31, and a return flow pipe line may be run in
to the lower part of the unit or water jacket M,
as indicated at 38, where such pipe is indicated
in broken lines. It will thus be seen that the
circulation of hot water in the system will then
be made more rapid by reason of the fact that
the water in the unit ! 4 will become highly heated
quickly and in rising will force the water from
the jacket 2 into the system. When the furnace
is used in this manner, the pipes 32 and 33 may
By the novel construction of the ?re pot where
by the vaporized oil rises to the top of the pot as
plenished thru this pipe.
20
area 39 flows thereinto thru the opening [1,
and the amount of air entering in this manner
may be effectively controlled by regulating the
position of the plate l8 relative to the bottom II].
From the foregoing it will be readily apparent
supplying domestic hot water and employs for
this means a water jacket for the ?re pot and
there is thus obtained the double function of
preventing the ?re pot, which may be of metal, 15
from becoming heated beyond a desired degree,
and simultaneously providing hot water for either
of so that as water is drawn off it will be re
15
air will be mixed in the ?ame from the area 39
which is formed between the furnace wall and the
wall 9 of the unit 8. This air rising thru the
As previously stated, any suitable means may
be coupled together or the upper one may be
replaced by a plug to close the upper part of
the jacket and the lower pipe 33 may be coupled
with the cold water side of the house water
40 system so that additional water may be run into
the system when necessary.
In the operation of the present oil burner, the
oil as it is ?rst introduced thru the pipe 22 into
the lower part of the ?re pot will spread over
45 the bottom of the pot and will be ignited from
the pilot 24. As the ?re pot heats up the newly
introduced oil will be immediately vaporized and
the constantly increasing temperature of the ?re
the same becomes heated so that when the sys
tem is running properly the flame will be at the
top only of the ?re pot, the pilot 24 will be ex
tinguished while the furnace is in full operation
by reason of the fact that the gas entering thru 25
the pilot tip will be shut off from the necessary
oxygen for its combustion. After the furnace has
shut down and the ?re pot begins to cool, the
?ame will subside and return to the bottom of the
pot where it will again ignite the gas from the 30
pilot tip 213 before the remaining vaporized oil
is all consumed and the furnace becomes com
pletely shut off.
What is claimed is:
1. An oil burning furnace, comprising a casing, 35
a ?re pot in the casing and supported above the
bottom thereof, said ?re pot having a bottom
having a central air inlet opening, means forming
an air chamber beneath the bottom of the pot
and having said opening communicating there
with, means in the pot for receiving air from said
opening, and carrying it upwardly and discharg
ing it in spaced horizontal planes in and above
the ?re pot, means for introducing air into said
chamber, means for delivering fuel liquid into
the ?re pot, said pot and chamber being spaced
from the casing providing an air passageway sur
pot will cause the ignition area of the vapor to
rounding the pot, an outlet in the casing above
the pot for the escape of fuel gases, and a damp
50 rise until the lower part of the ?re pot will be
er controlled air outlet in the bottom of said
completely ?lled with vapor and the ignition or
burning thereof will take place at the top. This
vapor will be supplied with the proper amount
of air necessary for its complete combustion,
55 thru the opening 25 and the openings 29 of the
vertical air pipe 21, the air passing ?rst thru
the chamber 2| where it will be heated to a
certain extent. It will thus be seen that as the
ignition plane for the oil vapor rises in the ?re
60 pot, air will be admitted into the pot and will
mix with the vapor so that a thorough combus
tion of the vapor will take place.
' The arrows indicate the course followed by
the air entering the furnace thru the pipe 2'!
65 and from the apertured sphere 28, and it will
be seen that as the oil is vaporized the air en
tering will strike the side walls of the ?re pot
and will be de?ected upwardly and as it passes
from the top of the pot additional air will be
70 discharged as indicated by the arrows, from the
sphere 28, so that complete combustion will take
place and a blue-white ?ame will be developed.
This flame is spread by the air from the sphere
28 against the sides of the water cell or jacket
75 2 and as it strikes this part of the structure some
chamber.
2. An oil burning furnace, comprising a casing,
a ?re pot in the casing and supported above the
bottom thereof, said ?re pot having a bottom
having a central air inlet opening, means form
55
ing an air chamber beneath the bottom of the
pot and having said opening communicating
therewith, means in the pot for receiving air
from said opening and carrying it upwardly and
discharging it in spaced horizontal planes in and 60
above the ?re pot, means for introducing air into '
said chamber, means for delivering fuel liquid
into the ?re pot, said pot and chamber being
spaced from the casing providing an air passage
way surrounding the pot, an outlet in the casing
above the pot for the escape of fuel gases, a
damper controlled air outlet in the bottom of
said chamber, a wall extending upwardly from
and forming a continuation of a wall of the air
chamber to the top of said pot and in spaced
70
relation with the same and spaced from the
casing, and said wall being joined to the pot at
the top and at the bottom thereof and forming a
jacket chamber thereabout.
3. An oil burning unit for disposition within a
2,136,817
furnace casing, comprising a body having a ver
tical side wall and a bottom wall, said bottom
wall having an air opening therethrough, damper
means disposed adjacent said opening for regu
lating the ?ow of air therethrough, a ?re pot
within said body having an upwardly and out
wardly ?aring side wall and a bottom wall raised
at its center, said bottom wall of the ?re pot hav
ing an opening therethrough, said ?re pot side
wall being joined with the top of said body side
wall, a horizontal wall between the lower part
of said ?re pot and the body side wall forming
an air chamber below the ?re pot, means for
introducing air into said chamber, a fuel oil
3
pipe leading into the lower part of said ?re pot,
a vertically disposed pipe arranged centrally
within the ?re pot and having its lower end in
communication with said ?re ‘pot bottom open
ing, and a hollow body upon the upper end of
said pipe and extending partially above the top
of the ?re pot, said pipe having an annular series
of air openings adjacent said ?re pot bottom and
a second annular series of openings adjacent the
top of the ?re pot and within the same and said 10
hollow body having an annular series of air open
ings disposed in a plane slightly above the plane
of the top of the ?re pot.
COMINARDO RIALDINI.
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