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Патент USA US3099446

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July 30, 1963
-
J. K. SIDDLE ETAL
'
3,099,436
BURNER ASSEMBLY FOR HYDROCARBON FUEL
Filed Feb. 4, 1960
I
2 Sheets-Sheet 1
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INVENTORS".
JOHN K. SIDDLE
By HAROLD L. MlLLER
AT TORN EV
July 30, 1963
3,099,436
J. K. SIDDLE EI'AL
BURNER ASSEMBLY FOR HYDROCARBON FUEL
Filed Feb. 4, 1960
Z Sheets-Sheet 2
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32
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uvmvrons.
JOHN K. SIDDLE
BY HAROLD L. MILLER
ATTORNEY
United States Patent O?ice
3,699,436
Patented July 30, 1963
2
1
3, but showing portions of the mechanism at a different
3,099,466
BURNER A§§EMBLY Ftlli HYDRQCAREUN FUEL
John K. Siddle and Harold L. Miller, (lolurnbus, ()hio,
assignors to Midland-Ross Corporation, Qleveland,
Ohio, a corporation of Ohio
Filed Feb. 4, 1960, §er. No. 6,665
3 Claims. (Cl. 263-443)
operating position.
A burner assembly embodying the invention has a
main housing 10‘ comprising a bottom wall 11, side walls
12 and 13, a front wall 14 ‘and a back wall 15.
The
main portion of the housing 19 in the embodiment illus
trated in the drawings is generally rectilinear. At the
upper end of the housing it)‘, the front wall 14 has a
rearwardly directed, inclined section 16, and the side walls
This invent-ion relates to a burner assembly for burning
hydrocarbon fuel and providing heat in the form of hot 10 12 and 13, inclined section 16 and rear wall 15 are capped
by a cupola 17 over which a vent pipe 18‘ is positioned.
combustion products gases and mixtures of combustion
The housing 10‘ has a main side door 1'? supponted by
products gases and air for carrying heat to a usable loca
hinge plates 21} which are welded or otherwise secured
tion.
to the side wall ‘12.
The vaporization of gasoline and combustion of the
The burner assembly embodying the invention has a
vapors as a fuel after they have been passed through a 15
substantially conventional burner unit generally indicated
burner ori?ce is difficult because, unless the burning 1is
at 21, with a stack 22 extending upwardly from the unit
at a closely controlled temperature with closely con
21 and opening within the con?nes of the housing 10‘.
trolled mixtures of air and fuel, carbon is formed during
The burner unit 21 is supported in the housing 10‘ on a
the combustion and is deposited as soot within the com
bustion chamber and on the burner parts and frequently 20 hollow stand 23 with a packing gland 24 securing the
stand 23 in place on the bottom wall 111 and with control
extinguishes the ?ames. A second problem also exists
elements 25 extending downwardly through the gland 24
in the combustion of gasoline in a gas generating type
and into the interior of a hollow base 26‘. Adjustable
burner due to the presence of gum and other heavy mate
elements 25 function to determine the rate of flow of
rials in the gasoline which are deposited out during va
porization of the liquid to a gas onto the surfaces in the 25 fuel, speci?cally gasoline, into the burner unit 21.
A burner assembly embodying the ‘invention has an air
vaporizing chamber and the fuel jets. Either of these
inlet duct generally indicated at 27, for the purpose of
deposits renders the burner ine?icient and may cause the
supplying and heating air from outside the housing 10* to
?ame to be extinguished after relatively short peniods of
heating.
It has been discovered that deposits as a result of va
the burner unit 21.
The hot air duct 27 in the embodi
30 ment shown has two inlet openings 28 and 29‘ at the sides
and near the top of the inclined section 16 of the front
wall 14. The hot air duct 27 extends laterally across
and immediately behind the wall section 16 and is located
careful control of combustion air temperature.
above the end of the combustion stack 22. The air duct
It is, therefore, the principal object of this invention to
provide a burner assembly comprising a vaporization 35 27 narrows as it extends downwardly along the wall sec
tion 16 and the front wall 14 and has an open lower
chamber for the combustion of a liquid hydrocarbon fuel
end 30. Air supplied by the duct 27 is preheated as it
in which the temperature at which the fuel is vaporized
passes through the upper portion of the duct 27 by rea
in the vaporization chamber is closely controlled. It is
a further object of the invention to control the tempera 40 son of the exposure thereof to the hot gases ?owing out
of the combustion stack 22. The air which is preheated
ture of the fuel vaporization chamber by subjecting it to
in duct 27 is admitted to housing 10‘ through open lower
the thermal action of a supply of air for combustion com
end 30 of duct 27. To effect proper control of the tem
prising streams of cold air and preheated air. It is a
perature of the vaporization chamber 21a of burner 21
further object of the invention to provide means respon
sive to the temperature of the vaporization chamber to 45 it is necessary that the stream of preheated air from duct
27 be caused to flow by vaporization chamber 21a in
vary the relative rates of ?ow of the streams of cold air
heat transfer relationship therewith. This is accom—
and preheated ‘air to maintain the temperature of the
plished by locating the open lower end 30 of duct 27
vaporization chamber at a substantially constant value.
adjacent burner unit 21 and su?iciently far from vent pipe
It is another object of the instant invention to provide
a simple, portable, lightweight burner for gasoline to 50 18 so that the preheated air from duct 27‘ will enter hous
ing 10 at a point that is at least as far upstream of vent
provide hot gases for the heating of equipment under
pipe 18 as is vaporization chamber 21a of burner unit 21.
?eld conditions, as, for example, for the heating of mili
The door ‘32 is mounted by hinge plates 33 which are
tary equipment at locations remote from permanent instal
welded or otherwise secured on the front wall 14 of the
lations.
housing 119. The door 32 has a counterweight 34 which
More speci?cally, it is an object of the instant inven
is mounted upon an angular bracket 35 and which tends
tion to provide a lightweight portable burner assembly
to cause the door 32 to swing to the closed position illus
for burning gasoline, for example, aviation gasoline, to
trated in FIG. 3.
provide hot gases for maintaining operative temperatures
At the lower end of the hot air duct 27 is a cold air
of equipment such ‘as a portable ?re extinguisher kit.
inlet port '31 which functions to provide cold air to hous
These and other more speci?c objects and advantages
ing 10. It is, of course, also necessary that the cold air
of the invention will be better understood from the speci
from linlet port 31 be caused to flow by vaporization
porization can be eliminated by close temperature control
of the burner vaporizing chamber, for example, by the
?cation which follows and from the drawings. in which:
chamber 21a ‘in heat transfer relationship therewith to
FIGURE 1 is a fragmentary view in front elevation,
properly control the temperature of vaporization chamber
with parts broken away, of a burner ‘assembly embodying
21a. Accordingly, cold air inlet port ‘31 is also located
65 suf?ciently far from vent pipe 18 that the cold air will
the invention;
FIG. 2 is a fragmentary view in cross section and on
an enlarged scale, taken along the line 2--2 of FIG. 1;
FIG. 3 is a fragmentary side view taken from the posi
tion indicated by the line 3—3 of FIG. 1, with parts
broken away; and
FIG. 4 is a fragmentary View similar in part to FIG.
be caused to enter housing 10 at a point that is ‘at least
as far upstream of vent pipe 18 as is vaporization cham
ber 21a of burner unit 211. The amount of cold air
entering the burner housing is controlled by the position
of a door 32 for the port 31.
The temperature of the air
inside the burner housing is controlled by the relative
3,099,436
3
Ii
amounts of cold and hot air drawn into the burner hous
ing. For example, if the vaporization chamber of the
burner (designated 21a), or the body of the burner unit
21, becomes hotter-than the ideal temperature for-the
fuel being used, the cold air door 32 is opened to increase
the rate of ?ow of cold air through housing 16‘ past va
prising, in combination, a housing, a hot gas vent means
leading from said housing, a burner unit having a fuel
vaporization chamber and located in said housing for dis
charging products of combustion into said housing for
how therein and through said vent means, means for
introducing liquid hydrocarbon fuel to said vaporization
porization chamber 21a, relative to the rate of flow of
chamber for vaporization therein, van ‘air inlet for said
preheated air, thereby to exert a cooling effect on vapori
burner unit disposed in heat transfer relationship to the
zation chamber 21a.
products of combustion ?owing in said housing for sup
Movement of the door 32 and, in the embodiment illus 10 plying preheated air to said burner unit at a point that
trated in the drawings, opening of the cold air inlet port
is at least as far upstream of the hot gas vent means as
31 are both accomplished by a temperature responsive
the vaporization chamber, a variable cold air inlet port
mechanism comprising an actuating arm ‘36. The actu
means associated with said housing for supplying cold
ating arm 36 has an offset ?nger 37 in line to engage
with the cross portion of a bracket 38 on the door 32
air to said burner unit at a point that is at least as far
upstream of the hot gas vent means as the vaporization
and to swing it in a clockwise direction (FIGS. 3 and 4)
chamber, means responsive to the tempenature in said
vaporization chamber, and means actuated by said tem
perature responsive means for varying the opening and
closing of said cold air inlet port means for controlling
the quantity of cold air admitted therethrough for said
burner unit to maintain the temperature of the fuel vapori
as the arm ‘36 is swung in response to temperature
changes in the burner unit 21. The cooler air will reduce
the temperature of the vaporization chamber of the
burner back to the desired ideal temperature. The arm
36 also has a cross member 39‘ which extends along the
back of the burner unit 21 and functions as a stop.
The arm 36 is keyed or set on the end of a stub shaft
40 which extends horizontally and is journaled for rota
tion in a plate 41 secured to the outer face of a retainer
block 42. The retainer block ‘42 is rigidly mounted on
zation chamber ‘at a substantially constant value.
2. A burner ‘assembly for liquid hydrocarbon fuel com
prising, in combination, a housing, a hot gas vent means
leading from an upper part of said housing, a burner
unit having a fuel vaporization chamber and located in
the side of the burner unit 211. The retainer block 42
said housing for discharging products of combustion into
has a circular recess 43‘ coaxial with its bore for the shaft
40, and serving to accommodate a thermostat coil 44.
The inner end of the thermostat coil 44 extends through
a slot 45 in the shaft 49* and the outer end of the thermo
stat coil 44 is hooked in a radial slot 456 in the block 42.
said housing for flow therefrom through
vent means,
means for introducing liquid hydrocarbon fuel to said
vaporization chamber for vaporization therein, an air
inlet duct lea-ding into and through at least a part of said
housing and terminating near said burner unit for supply
ing pre-heated air to said housing at a point that is at least
When the vaporization chamber of the burner becomes
cooler than the ideal temperature, the cold air inlet port
as far upstream of the hot gas vent means as the vapori
door closes via movement controlled by the thermostat 35 zation chamber, a cold air inlet port in said housing near
said burner unit for supplying cold air to said housing at
coil 44, arm 36, and bracket 38. Closing the cold air
a point that is at least as far upstream of the hot gas vent
inlet door 32 decreases the rate of ?ow of cold air through
housing 10 past vaporization chamber 21a, relative to
means as the vaporization chamber, a movable door for
said port, means responsive to the temperature in said
the rate of ?ow of preheated air, thereby to exert a heat
vaporization chamber and means actuated by said tem—
ing effect on vaporization chamber 21:: to restore its tem
perature responsive means for varying said door for said
perature to the desired ideal value. The unit is designed
cold air inlet port between open and closed positions for
so that the cold air inlet port door 32 will normally be
open slightly while operating‘under the coldest conditions
controlling the quantity of air ?owing through said cold
air inlet port to maintain the temperature of the fuel
further in the event the vaporization chambers should 45 vaporization chamber ‘at a substantially constant value. _
3. A burner assembly for liquid hydrocarbon fuel com
become colder than the ideal temperature.
prising, in combination, a housing, a hot gas vent means
It has been found that the burner assembly embody
leading from said housing, a burner unit having a fuel
ing the invention disclosed in the drawings, with the indi
vaporization chamber and located in said housing for dis
cated mechanism is capable of limiting deviations from
charging products. of combustion into said housing for flow
a predetermined temperature of the burner unit 21 to
so there will be some control left for warming the air
about 5° F., and that with such close temperature con
therein and through said vent means, means for intro
trol fouling from gum and other deposits is reduced to
such an extent that the burner is capable of operation
for long periods of time without attention. It will be
ducing liquid hydrocarbon fuel to said vaporization cham
appreciated that means other than the door 32» for con
trolling the proportions of heated and cold air can also
be used to control temperature as discussed.
For exam
ber for vaporization therein, an air inlet for said burner
unit disposed in heat transfer relationship to the products
55 'of combustion ?owing in said housing for supplying pre
heated air to said burner unit at a point that is at least
as far upstream of the hot gas vent means as the vaporiza
tion chamber, a cold air inlet port means. associated with
said housing for supplying cold air to said burner unit at
thereof or in addition thereto, or the cold air inlet can
be eliminated so that all combustion air is heated, and 60 ya point that is at least as far upstream of the hot gas vent
means as the vaporization chamber, means responsive to
the temperature can be controlled by a damper which is
the temperature in said vaporization chamber, and means
actuated to reduce the rate of flow in response to a low
actuated by said temperature responsive means for varying
ered temperature, and to increase the rate in response
ple, a damper can be used in the heated air inlet in lieu
In such case, means must
the relative proportion of air admitted through said inlet
be provided to prevent the complete blocking of the air
and said port means for said burner unit to maintain the
temperature of the fuel vaporization chamber at a sub
to an increased temperature.
inlet when the vaporization chamber is cold. Such means
can comprise a stop which prevents complete shuttling
of the damper, or an ori?ce through the damper for sup
plying combustion air even when the damper is closed.
Both cold air and heated air inlets and means for propor
tioning the ?ow through at least one of the two are pre
ferred, because variations in the rate at which combustion
air is supplied are then minimized.
We claim:
stantially constant value.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,972,836
Te Pas _____________ __.__ Sept. 4, 1934
2,137,469
2,174,663
2,287,346
VJillson _____________ __ NOV. 22, 1938
Keller ________________ __ Oct. 3, 1939
Fishel _______________ __ June 23, 1942
1. A burner assembly for liquid hydrocarbon fuel com 75 2,859,807
Newman et al _________ __ Nov. 11, 1958
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