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Патент USA US2137469

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Patented Nov. 22„ 1938
UNITE
2,137,469
STATS
TET yclerics. .»
allevato
sro
Hiram It.
son, Leavenworth, Mans., assigner to
Great Western Stove Company,
Mans., a corporation ol
venworth,
a
»apuestan aua lo, rose, 'anni no.; sans
9
‘il l hill ‘t
(GUE. 1126-93)
s invention relates to stoves, particularly
to those for burning fuel oils, vsuch as furnace
oil or light colored distillate, and has for its
principal object to provide a stove of this
.character which. is capable of efñcient opera
tion throughout the entire range of burner ad
.lustmenh that is, from low iire to high hre,
thereby providing any degree oi heat which it is
desired to generate.
p
'
@ther important objects of the invention are
to provide a stove of this typev with a simple,
inexpensive preheater whereby a part of the com--A
hustion air is heated prior to its mixture with
unheated air;` to provide i'or selectively propor
ï it tioning the ratio ol’ the unheated air to the pre
heated combustion air; and to provide for miu
ture oi the unheated and heated combustion air
t. 'the wall of the combustion cylinder is pro
vided with a plurality oi various sized openings
itl designed to admit sumcient air i’or supplying
requirements of the blaze rising within the com
bustion chamber during operation of the stove.
Seated upon the harige t is a _flame flattener lt
preferably comprising a casting having an an“
nular dange il seated on the ñange t and a de
pending ñange lt sleeved within the upper end 10
of the combustion cylinder. The dame ñattener
extends across the top of the combustion cylin-~
der and has a suitable opening it therein tor
passing the dames to the upper part of the shell.
'.'Chreaded into the bowl il is a iuel supply pipe
it having a control valve il therein .tt is op
erated by a regulatingstem lt extending laterally
prior to Ãadnflission into the combustion chamber.
ln accomplishing‘these and other objects ci’
under the bottom plate «t and having its outer
the invention, as hereinafter pointed out, l have
provided improved details of structure, the pre
from the danse il. llt‘he pipe 2t extends in the 20
i’erred form df which is illustrated in the accom
panying drawing, wherein:
`
lille. l is a vertical section through a stove em
bodying the features of the present invention;
liî‘lg. 2 is -a horizontal section through the stove
on the line -t--l of Fig. l.
`
Fig. t is a detail perspective view of the pre
«till
between the division member t and bottom plate
heater ior a part of the combustion air supply.y
Referring more in detail to the drawing:
l designates a stove which includes a shell t
preferably cylindrical in cross-section. and hav
ing its upper and lower endsv closed by plates
il and il. The upper plate t is oi solid construc
dh tion, however, the lower plate has a plurality of
air inlet openings t arranged in circular series
about the axis of the` shell and through. which
' air is admitted, as later described. The lower
' plate t has an outwardly anddownwardly daring
end rotatably mounted in a bracket it depending . l
opposite direction and is-supported in a bracket
' llt depending from the under side of tha plate il.
The outer end of the pipe carries an elbow tt
provided with a nipple lt that is connected with
the outlet ot a sub e r » .a or pan il in which an oil 25
supply tank it is inverted. The ïoil tanh td is
provided’with an automatic outlet valve it as in
conventional oil stove practice, which allows ba
rometic feed of the oil in promrtion to the amount
nowing through the valve il into the combustion 30
pylinder. The subtanlr is supported on an angle
shaped bracket tt that is ñued to the lower end
tl ci an arcuate shield ltd.
Ill‘he shield tt er?
tends upwardly 'along the side oi’ the shell t and
protects the supply tank from the effects of the 35
heat generated in the stove. The shield is car
ried from the shell t by means of bracket arms
tt and tt hired to the upper and lower ends
ol a preheater tt.
shirt t to which legs 'l are attached for support
The preheater it includes an arcuate shaped 40
ing the shell above the floor and to provide space v casting having lateral iianges tt and dl that are
whereby air may flow to the openings t. Mounted
ed to the side oi” the shell i by means of bolts
in the shell 2 at a point spaced above the plate
or other suitable fastening devices to form a ver
t is a concavo-convex divisionv member t ar
tical duct extending downwardly alongside oi the
ranged with its concave side uppermost. Formed
in the bottom ci the division member is a down
set, annular seating ñange d encirclingv an open
ing llt that aligns with a bowl il that is sup
ported by lugs li' in an opening t' of the bottom
shell and in heating relation'v therewith. The v
lower end of the preheater is closed by a hori- ¿
plate t.
'
‘
Suspended within the opening Il) and having
its lower end seated on an annular shoulder it
of the recess il is a combustion chamber includ
zontal plate tt to divert air that is drawn through '
the open upper en
lor dow through an
:ff ‘n
tt formed in the shell at a point below the
division member t.
50
The upper end oi’ the stove is provided with an
outlet tt for the spent products oi’ combustion
which outlet is connected with a. suitable »due or
ing a cylinder it which further cooperates with other vent' by means of a stoveplpe tl. The
the shell 2 to form ari annular air chamber it ~ products of combustion moving through the stove
2,137,469
2
are retarded by means of a baille and heat equal
forming an air supply duct in heating relation
izer 42 that is fixed to the inner side of the shell with the shell and having connection with the
2 at a point below the flue outlet. The baille air chamber, brackets carried by the supply
thus provides a tortuous path for the products duct, a guard supported by the brackets, a fuel
of combustion before they can flow through the supply tank carried by the guard and shielded
flue outlet, thereby retaining the heat units from ‘ from heating effects of the shell by the guard, a
I escaping to the flue. The shell 2 is provided burner in the shell, and means connecting the
above and below the division member 8 with in
supply tank with the burner.
'spection and service openings 4I and 44 that are
2. A stove of the character described including
10 closed by doors 45 and 46 as in conventional
a shell, an air chamber in the shell, means form
practice.
ing an air supply duct in heating relation with4
_In order to facilitate vaporiz'ation of the fuel the shell and having connection with the air
admitted into the bowl Il, I provide a vaporizer chamber, brackets carried by the air supply duct,
41 in the form of a baille having legs 48 for sup
a substantially arcuate guard supported by the
15 porting the defiector portion thereof in spaced brackets, a fuel supply tank carried by the guard
relation with the oil outlet. The legs are spaced and shielded from heating effects of the shell by
apart to provide outlets for the fuel into the the guard, a burner in the shell, and means con»
g combustion cylinder.
necting the supply tank with the burner.
3. A stove of the character described including
In order to control the amount of unheated
20 air admitted through the inlet openings 5 and a shell, a fire-pot supported in the shell, a per
thereby regulate ratio of the >heated combustion forated combustion chamber cooperating with
air to the unheated air, the plate 4 is provided the bottom of the ñre-pot and the shell to form
with a shutter 49 comprising a ring 50 movably an air chamber circumferentially of the com
mounted about the periphery of the combustion bustion chamber, said shell having an air inlet
opening located below the fire-pot and at an ele
25 cylinder and having openings 5I therein regis
trable with the openings 5. It is obvious that by vation near the top of the combustion chamber, a
moving the shutter in an arcuate direction about conduit supported in heat conductive relation
the combustion cylinder the eifective'port area of with the shell for supplying heated combustion
the openings 5 may be regulated to that best air tov the air chamber through said opening,
means for supplying unheated combustion air
30 suited for supplying the required amount of com
bustion supporting air.
°
circumferentially of the air chamber and below
In using a stove constructed as described, the the inlet for the heated combustion air, means
valve 2| is opened to allow ñow of oil from the for supplying aI ñuid hydrocarbon fuel Yto the
tank into the bowl Il . The oil is then ignited in combustion chamber, and means for regulating
the supply of unheated combustion air for con
35 the combustion cylinder. A part-of the combus
tion air is admitted through the inlet openings I trolling draft of air through the conduit supply
10
15
20
25
30
vwhile another part of the combustion air is ad
ing heated combustion air to proportion the
mitted through the preheater by reason of draft _ratio of said combustion air supplies in the air
through the stove to the flue outlet. The heated chamber for controlling the degree of heat gen
and unheated combustion air, after mixing in erated incidental to combustion of the fuel.
the annular chamber I4, passes through the open4. A stove of the character described including
ings in the wall of the combustion cylinder ~to a shell, a fire-pot in the shell. a cylindrical ccm
support combustion òf the fuel. After the stove bustion chamber cooperating with the fire-pot
is heated. the portion of the air supply admitted and the shell to form an annular air chamber and
through
the inlet openings 5 is regulated to an having openings connecting the air chamber
45
amount best suited for supporting combustion with the combustion chamber, means closing the
of the fuel being admitted to the stove. '
When it is desired to maintain a high fire, the
valve 2l is opened sufficiently wide to provide
the proper flame. The side walls of the shell 2
become thoroughly heated and the air flowing
through the preheater becomes heated sufhcient
ly hot that when mixed with the unheated air the
fuel is readily vapcîrized and combusted. Should
it be desirable to provide a large quantity of com
55 bustion supporting air, the shutter may be oper
ated to open the inlets 5, thereby allowing greater
draft through the inlet openings 5 and less
through the preheater supplying the heated com
60
bustion air. If the supply of combustion sup
porting air is to be reduced the shutter is regu
lated so as to slightly close off the inlet open
ings 5.
,
From the foregoing, it is obvious that I have
provided a stove capable of burning fuel oils
85 throughout the full range of burner adjustment,
for example from low fire to high fire according
to the degree‘of heat desired. It is also obvious
bottom of the air chamber and having a circu
lar series of air inlet openings for admitting un
heated combustion air to the air chamber, a
damper controlling the effective port area of
said openings, said shell having an air inlet
opening located above the combustion chamber
and below the fire-pot, a conduit supported -in
heat conductive relation with the shell for sup
plying heated combustiony air to the air chamber 55
through said opening, and means for supplying
a fluid hydrocarbon fuel to the combustion
chamber.
-
5. A stove of the character described includ
ing a shell, a fire-pot having its periphery fixed
to the shell and provided with an opening in the
bottom of the pot, means closing the bottom of
the shell below the fire-pot and having a circu
lar series of air inlet openings for admission of
unheated combustion-air, a fuel bowl supported 65
by said closure, a combustion chamber having its
upper end supported in the opening of the nre
pot and its lower end supported in registering
that the stove is of relatively inexpensive and
simple'constructio'n and may be readily adjusted `relation with the fuel bowl and provided with
70 to efficiently consume any of _the lighter grade perforation's through which air is admitted to 70
the combustion chamber, a damper for con'
fuel oils.l
What I claim and desire to secure by Letters
Patent is:
1. A stov'e of the character described including
75 a shell, an air chamber in the shell, means
trolling the effective port area of said unheated
combustion air inlet openings, means for admit
ting a fluid hydrocarbon fuel to the fuel bowl,
and means for supplying preheated combustion
aisance
air at a point below the ñre-pot for mixture with
the unheated air.
v
'
-
6. A stove of the character ~described includ
ing a shell, a fire-pot having its periphery fixed
to the shell and provided with an opening in
the `bottom of the pot, means closing the bottom
oi the shell below the fire-pot and having a cir
4
sf#
admitted 'to theccombustion chamber, a. damper
for controlling the effective port area of said airinlet` openings, means for admitting a huid hy
drocarbon fuel to the fuel bowl, means for sup
plying preheated combustion air at a point below .
-the hre-pot for mixture withy the unheated air,
a flamel spreader supported in the fire-pot over
cular series of air inlet openings for the admis- - 'the combustion chamber for spreading the flame
sion of unheated combustion air, a fuel bowl sup
ported by said‘closure, a combustion chamber
having its uppeî end supported in the opening
of the nre-pot and its lower end supported in
registering relation with the fuel bowl and pro
vided with perforations through which combus
tion air is admitted to the combustion chamber, a
damper for controlling the effective port area of
said air inlet openings, means for admitting a
fluid hydrocarbon fuel to the fuel bowl, means
'for supplying preheated combustion air at a point
issuing from the combustion chamber into the
fire-pot, and a. vaporizer in the fuel bowl and hav
ing a deflector portion for directing vaporized
fuel toward the inner periphery of- the combus
tion chamber.
.
ß. A stove of the character described includ
ing a shell, an air chamber in the shell, means 15
forming an air supply duct to the air chamber
and located in heating relation with the shell, a
guard connected with said means forming the
air supply duct, a fuel supply tank carried by the ~
below the tire-pot for mixture with the unheated
air, and a flame spreader supported in the flre
pot ,over the combustion chamber for spreading
the flame issuing from the combustion chamber
and means connecting the' supply tank with the
into the :dre-pot.
burner.
'
guard, and shielded from the heating effects of 20
the shell by the guard and the movement of air
through said supply duct, a ‘burner in the shell,
°
\
'
7. A stove of the character described includ
9. A stove of the character described includ 25
‘ing a shell, a nre-pot having its periphery fixed ing a shell, an air chamber in the shell, an >air
to the shell and provided with~an` opening in the ' supply duct connected with the side of the shell
bottom of the pot, means closing .the bottom of
the shell below-the fire-pot and having a circular
series of air inlet openings for admission of un
for conveying combustion air in heat conductive
relation with the shell to the air chamber, and a
fuel tank supported from the shell in spaced re 30
lation with said supply duct, whereby the tank is
heated combustion air, a vfuel bowl supported by
said closure, a vcombustion chamber; having its >protected from the heating effects of the shell
upper end supported inthe _opening of the fire-` incidental to movement of air through said duct
pot and itslower end'supported in registering re
to the .air chamber.
'
lation with the fuel bowl and proyided with
85
perfor-ations through which combustion air is
_Hmm n. musoN.
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