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Патент USA US2123887

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‘ “My 19, 1.933-
c. A. FRENCH
FUEL VAPORI ZER
Original Filed ‘April 6, 1932 '
2,123,387
an»
~ Patented July 1%, i3
rrrr ‘or-re
: are
I amass?
rum. varonn -
(Charles A. lil‘rench, Riverside, 1111., assignor, by
mesne assi :1: in!‘ cuts,
Marl; 6. Bates
‘
‘
origami ‘application spin 6, 1932, Serial no.
. 603,491. Divided and this application August
llll, 1933, Serial‘No. 6%,656
e
to Claims. (cits-iii)
p
.
,
This invention relates to a device for vaporize
ing liquid fuel and forming combustible, gaseous
mixtures therewith.
1
'
~
'
The principal object of ' this invention is to
5 provide an apparatus for thecomplete vaporiza
_ tion of heavy liquid fuel and for the intimate mix-l
ing of the vaporizedfuel with air.
.
Another principal_object is to provide means
for metering the fuel, which eliminates all meter
‘lil ing of the fuel in the liquid state with the at
tendant diihculties due to the'relatively small
amounts of liquid fordarge volumes of air, when
forming combustible mixtures, and to the in
ertia and viscosity of the liquid.
‘15
Another object is to vaporize heavy liquid fuel
with a minimum of decomposition and to thereby
reduce the troubles caused by carbonaceous de
posits.
,
'
tacting means utilized in the illustrated vaporr
izer.
.
-
'
Referring to the drawing, by the use of either
suction at the outlet end or pressure at the inlet
end, or, in other wordsby a pressure di?erential, 5
air iscaused to ?ow through'an air inlet till, a
nozzle 65, which-is surrounded at its discharge end
by ‘a Venturi-shaped member 66, and a discharge
conduit ?ll.
The member as is also shaped and
'
arranged with respect to the nozzle 65 to give 10
an aspiratingaction in a chamber 660. formed
around the nozzle by an- enlargement on the
member 66.‘ A conduit 58, communicating with
the chamber 66a, joins said chamber with a va
porizing chamber $9. The vaporizing chamber is 15
formed in three sections secured together in a
gas-tight manner. The uppermost ‘section is
. comparatively small and’provides a means for
'
connection of the vaporizer to the conduit tit.
'20 inexact proportion to the requirement of heat‘ The middle. section is cylindrical in form and pro- 20
Another object is to provide vaporizing heat
for a given amount of vapor orcornbustible gas.
Another object is to provide means for pro
vides the main .part- of‘ the vaporizing chamber. »
The lowermost section, in addition to being a
part of the vaporizing chamber,_ forms a reser
ducing a gas voi substantially‘ constant heat value‘
voirln which liquid is maintained at the indi
over a wide range in the rate or‘ production.
25
The objects or‘ the invention as above set forth, cated' level by a conventional ?oat chamber it). 25
and other more speci?c objects, which will be The ?oat chamber is provided with a' source of _
apparent as an embodiment of the invention is liquid fuel ‘Hi and a balancing conduit F2 for
maintaining the pressure above the liquid in the
described, are accomplished by supplying vapor
' ization heat from the sensible heat carried by hot ?oat chamber the same as the pressure in the va
30 gases to an excess of fuel, whereby theamount‘of . porizing chamber, The bottom of the liquid res- .30
fuel vaporized is exactly proportional to the heat - - ervoir is formed with a ?at surface over which an
supplied. By vaporization in this manner, the
metering of liquid fuel'with the attendant dim
culties is eliminated
35
.
The vaporization heat may be supplied in sev
eral ways, so long as it is in substantially ?xed
‘ proportion to the amount of- combustible gas de-'
agitating member 13 is adapted to be rotated by
a cranked shaft "Ill extending through the bot
tom of the reservoir. A valve controlled drain‘
ing conduit 15 is connected to the bottom of the '35 ’
reservoir.
'
>
1
l
_ ' A conduit 16 of a substantial internal diameter
extends into the uppermost section of the vapor- .
This application is a division of United States -izing chamber and centrally downwardly there
40 application, Serial No. 603.491, ?led April 6, 1932, through into the main body of the chamber. A 40
which discloses several di?erent devices for va-~v cylindrical member ‘ll, connected to the interior
porizing by utilizing ‘a metered or required end of the conduit 16, extends below the normal
level ofthe liquid in the reservoir and is provided‘
amount of heat supplied byhot gases. Said ap
plication relates to a method of vaporization. ' with a radially extending ?ange l8. . As best
shown in'Figure '2, the ?ange ‘I8 is provided with 45
45 This‘ application discloses and claims an appara
a plurality of small openings which, as illustrated,
tusfor carrying out, the method 'disclosedand ‘are
in the form of radially extending narrow slits.
claimed in the parent application.
‘
‘
,
sired.
,
.
'
In the drawing:
‘
i
-
,
'
'
Figure 1 is a, sectional view, somewhat diagram
50' matic in nature, illustrating the essential ele
'
ments and their relative arrangement of a va
porizer particularly designed to carry .out the
- present invention; and,
-
Figure- 2 is a. sectional view taken on the line
55 2-2 prime 1, showing in plan the liquid con
This ?ange, with the openings'formed therein,
provides a. bubbler plate for intimately contact
ing gases with the liquid in the reservoir.
»
50
7;, In the conduit 61, a small ‘elbow ‘I9 is formed
with its interior open end extending toward the
nozzle 65. Said elbow extends, out through the
conduit 51 and is joined with a T-shaped connec
' tion 80.
Said connection forms in effect a mixer 55
2,123,3a'7
for the pilot light or vaporizing flame of the de
vice. One end of the T-member is connected to
means and space that is unduly large for practical
a discharge nozzle 8| whichterminates a short
distance away from the open end of the conduit
18. A member 82 threaded on the nozzle 8| is
use of a little heat,‘ permits the contacting means
to be of reasonable size.
Any of the following methods may be used:
(a) Air is drawn through-the fuel and ignited at
purposes, so a compromise is made, which, by the '
adjustable toward and away from the end of the
conduit 16. A fuel line 83, which may be used ‘or above the surface of the‘fuel, developing heat
to conduct any type of fuel, is ?tted .into the enough to vaporize an excess of fuel which may be‘
third end of the T connection 88.‘ Air may also 'mixed with more air and burned in the burner or
10 be forced in through fuel line 83 to lean the mix
pilot ?ame ‘to continue operation‘.
10
ture, in order to‘obtain more complete combustion
(I?) A volatile fuel, such as gasoline, used in the
in the flame from nozzle 8|, in case a strongly re
vaporizing chamber, permitslburners to be lighted
ducing ?ame is wanted on the main burner (not.
in the regular manner without any initial heat.
shown).
15
.
.
A valve 84 is mounted in the conduit 88 in a posi
tion to regulate the flow of gas through said con
duit. A valve is also mounted in the conduit 64
and serves as a throttle valve to regulate the out
-
put of mixture from the vaporizer.
20
To operate the form of vaporizer above de
. scribed,- air pressure is applied to the conduit 64,
.It may be started on gasoline alone or the gaso
line may be mixed with the regular fuel and the
device will operate 'in‘the ‘regular manner with;
out any other preparation.
(0) A lighted torch may/be held at the pilot or
gas inlet with or withoutlfuel in the device. If
heated while empty, it starts operation when fuel 20
is turned on._ If started with fuel in the bowl-or
spray, it more slowly comes into operation.
around the nozzle. This suction or depression ‘is '
(d) An electric heater may be used to heat
also transmitted to the vaporizing chamber, the either the fuel or the air. If the fuel is heated,
25 valve 84- being open, whereby gases are drawn in
burner starts more slowly; if air is heated, it 25
‘through the conduit 16 and are contacted with starts at once.
'
7
~
'
the liquid in the reservoir at the bottom of the
Where, as illustrated, a bubble plate is used for
vaporizing chamber by bubbling through the slits - intimately contacting hot gases with the liquidto
whereby suction- is created vin the chamber 66a
formed in the bubble plate. Heat is applied to the ' be vaporized, the bubble plate must have a much
larger capacity than is necessary for normal op 30
may be supplied in any suitable manner, such as, eration in order to start theburner. The slits
for example, by holding a blow torch between the formed in the bubble plate or other means which
members ‘I8 and 82. -However, as illustrated. it might be employed to ?nely divide the gaseous
may be supplied by delivering an easily‘ignitable heating ?uid into ?ne streams, wherebyintimate
fuel through the conduit 83 and igniting the mix-. ‘contact with the liquid is obtained, assure an 35
ture formed at the end of the nozzle 8|. The almost quantitatively complete transfer of heat
member 82 is a shield to prevent air from being from the gas to the liquid. In order to start the
drawn into conduit 18 after the burner is in opera
burner when the liquid is cold and when the
tion. The hot products of combustion pass amount of heat supplied may be less than that sup
the outer portion of the conduit 16 down
plied when the device is in operation, a complete
I40. through
wardly through the inner vertical portion of said transfer of heat from the gas to the liquid must
member, through the member 11, and out through be assured. ‘This is obtained, as previously stated,
’ the bubble plate. The intimate contact obtained
by making the bubble plate of a larger capacity
by bubbling the hot gases through the liquid as _. than necessary for normal operation in order to 1
45 sures a substantially quantitative transfer of the get- the proper surface carburetion for starting.
45
sensible heat in the hot gases to the-fuel in the
It is to be understood that applicant has shown
reservoir. The vaporization continues in the and described only a preferred embodiment of his
, chamber above'the fuel level with equalization of improved vaporizing device, and that he claims as
temperature. The unvaporized particles of fuel his invention all modifications falling within the
50 carried up are dropped out in the low velocity zone ‘scope of the appended claims.
What is claimed is:
- formed by the large vaporizing chamber, and the
vaporized gas is superheated to a certain‘ extent
l. A vaporizer for di?icultly volatile liquid fuels
by contact with the member 11 and the conduit comprising a vaporizing chamber, means for
18 as said vaporized gas is drawn out through the maintaining a pool of said liquid fuel at a prede
conduit 68 into the Venturi member 68. The valve termined ’level in said chamber, means for re 55
84 regulates the proportion of vapor being drawn moving vaporization products from said chamber,
out with relation to the amount of air supplied a vaporizing gas conduit communicating with the
through the nozzle 65. _ The vaporized fuel and air vaporizing chamber and serving to introduce hot
are thoroughly mixed in the Venturi member 68 gases of combustion below the liquid level there
60 and a portion of said mixture enters the elbow of, means for burning a relatively small portion 60
n. ‘This ' ‘combustible mixture is discharged ~' only of the vaporization products, and means
through the ‘nozzle 8| and is completely burned , for delivering the products thereof to the vapor
izing. gas conduit.
in the conduit 16. It will, therefore, be under
stood that, after vaporization has been initiated,
2. Avaporizer for dimcultiy volatile liquid fuels
the necessary heat is supplied by complete com
comprising 'a vaporizlng chamber; means for 6.5
bustion of a portion of the vaporized gases.
. >
maintaining a pool of said liquid fuel at a prede
There are several methods by which vaporizers termined level in said chamber, a valve controlled '
of the type above described may be started. These outlet therefrom for the products of vaporiza
methods are based upon the fact that, if a~ small tion, a vaporizing gas conduit communicating
w'ith‘said chamber and serving to introduce hot
70 enough amount of cold airis brought into inti
mate contact with enough fuel and immediately gases of combustion below the liquid. level there
removed from further contact,~ an ignitable mix
of, means for burning aipredetermined relatively
ture will result with any liquid hydrocarbon at small portion-only of the products of vaporiza
any ordinary temperature. To make such an , tion, and means for delivering the products there
e?lcient surface carburetor requires a contacting of to the vaporizing gas conduit. ' . '
30 conduit 18 to initiate vaporization- This heat
i
. 2,128,887
'
3‘
10. A vaporizerv as de?ned in claim 7, including
3. A vaporizer for dif?cultly volatile liquid fuels
means for subdividing the hot gases whereby a - ‘
, comprising a vaporizing chamber adapted to con
greater area thereof is in contact with the liquid.
11. A fuel oil vaporizer,-including a discharge
conduit having a Venturi section, an air discharge
removing ‘a predetermined relatively small portion nozzle at said Venturi section, a vaporizing cham
only of the ‘mixed gases from said mixing means, ‘ ber having an upper passageway communicating
with the discharge conduit near said discharge
means for burning said gases, and means for-sup
plying the combustion products therefrom to the nozzle, means for maintaining, a supply'of liquid
10 vaporizing chamber into said pool of liquid fuel fuel in the vaporizing chamber, a relatively 10
tain a supply of liquidfuel, an air and combustible
gas mixing means, a valve controlled outlet from
said chamber to said mixing means, means for
smaller conduit extending into the discharge con
' and below the liquid level therein.
_ 4. A vaporizer for di?icultly volatile liquid fuels
duit and having its inner end shaped to with
draw gases from said discharge conduit, means
for burning the withdrawn gases, and means for
comprising a vaporizing chamber, means for
. maintaining a pool of said liquid fuel at a’prede
15 termined level in said chamber, an outlet con
delivering the burned gases to the‘ vaporizing 15
chamber below the level of liquid fuel therein.
12. A fuel oil vaporizer, including a discharge
conduit having a Venturi section, an air discharge
nozzle at said Venturi section, a vaporizing cham
ber having an upper passageway communicating 20
with the discharge conduit near said discharge
duit from said chamber above the liquid level
therein, a controlling valve positioned in said con
duit, a gas and air mixing means with which said
outlet conduit communicates, means for remov
20 ing a ?xed portion of the mixed gases from said
mixing means, means for burning said ?xed por
tion, and means for delivering the combustion
nozzle, means for maintaining avsupply of liquid
fuel in the vaporizing chamber, a relatively
products thereof beneath the liquid level in the
vaporizing chamber.
smaller conduit extending into the discharge con
duit and having its inner end shaped to with 25
draw gases from said discharge conduit, an ami
iary combustion "chamber in the form of an open
ended conduit extending into the vaporizing
'
5. A vaporizer for di?‘icultly volatile liquid fuels
comprising a vaporizing chamber, means for
maintaining a pool of said liquid fuel at a prede
termined level in said chamber, means for with
drawing the vaporization products from the
30 chamber, means for mixing said products with
air, means for Withdrawing a portion of the
mixed gases, means for burning said withdrawn
portion, and means for delivering the hot prod
ucts of combustion thereof below the liquid level
.
,
>
35 in the vaporizing chamber.
'6. A device asset forth in.claim 5, in which
means are provided for bringing the hot combus
tion gases into intimate contact with the liquid
25
fuel.
'
chamber, the gas withdrawing conduit communi
cating with but separated from the combustion
conduit, means for adjusting. the amount of sepa-,
ration to control the admission of air, and an ex
tension of said combustion conduit extending be
neath the level of liquid fuel in the vaporizing
chamber.
flange-like perforated plate secured to the com- _
bustion conduit extension, and comprising means
effective to ?nely divide the gaseous products of
-
‘7. A device for supplying a combustible mixture
combustion.
air to a combustion device, comprising a vaporiza
tion chamber, means for supplying an excess of
' dii?cultly volatile liquid hydrocarbon fuel to said
. remove carbon or other foreign matter which may '
accumulate in the chamber.
15. A fuel oil vaporizer comprising a vaporizing
chamber, an air intake having a Venturi therein, a
conduit connecting the vaporization chamber with
the throat of said venturi for conducting the
combustible products of vaporization to the air
intake, a burner, means to supply said burner
with a metered portion of the combustible gases
from the vaporization chamber and with air suf
?cient forxcomplete combustion of said metered
portion, said air and combustible gas supplying
chamber, means for maintaining a body" of oil in
said chamber, a conduit having a Venturi section,
a forcing nozzle disposed near said Venturi sec:
tion," a passageway connectingv an upper portion
of the vaporizing chamber‘ and said conduit near
'said forcing nozzle,v whereby air passing, through
said forcing nozzle withdraws vapors from said
vaporizing chamber, means for withdrawing a
relatively'small amount of air and vapor mixture 55
means being effective to at all times supply the
55 same ratio of air and combustible gas, and means
iii)
.
14. The combination of claim 12, including a
scraper disposed in the bottom of the vaporizing
chamber, and means for actuating the scraper to
of relatively heavy liquid hydrocarbon vapor and
to direct the products of combustion from the
burner into the vaporization chamber into inti
mate contact with said excess of liquid fuel to
effect vaporization of a portion thereof.
8. A fuel oil-vaporizer, including a discharge
~
13. The combination of claim 12, including a
from said c9nduit,-a burner for burning said mix
ture, a‘ passageway disposed within vsaid ?rst
mentioned passageway, and extending into the
' vaporizing chamber beneath the level of oil there- , ~
in, and means for delivering hot gases of combus
conduit having a Venturi section, an air discharge ' tion from saidburner into said last mentioned.
nozzle at said Venturi section, a fuel vaporizing
.
chamber, means for maintaining a predetermined
level of liquid fuel in the vaporizing chamber,
means for withdrawing a portion of vaporized fuel
from said discharge conduit and burning the
same, means for delivering hot combustion gases
of the burned .fuel to the vaporizing chamber be
low the level of the liquid fuel,v whereby to cause
passageway.
'
'
16. A vaporizer for vaporizing a dif?cultly vol
atile liquid ,fuel preparatory to burning same,
which comprises a vaporization chamber, means
for maintaining, at‘ all times during operation of
said vaporizer, an amount of fuel in said chamber "
in excess of that which can be vaporized by the
hot gases employed for such purpose, an air. and ‘
vapor mixing device positioned to withdraw va 70 l
vaporization
of
a
portion
of
said
fuel,
and
means
Ii)
for delivering the vaporized fuel to said mixing pors from the vaporization chamber andmix the
chamber.-
.
_
9. A vaporizer as de?ned in claim 7, including
means for removing carbon residue from the bot-‘
75 tom of the vaporizing chamber.
same with air to form_a combustible vaporous
mixture, means for burning only a minor portion
of said vaporous mixture, and a conduit for de
livering to the vaporization chamber into inti- '
4
2,128,887
the resulting mixture of air and fuel vapor
whereby hot gases of combustion are formed, and
mate contact with said fuel the hot gases result
ing from the burning of said- minor portion of
said vaporous
~
'
_ means for leading the resulting hot gases of
‘
17. A vaporizer as de?ned in claim 16, wherein ‘
the conduit thru which said hot gases are de
livered to the vaporization chamber is in the path
of vapors drawn from the excess of fuel main
tained in the vaporization chamber.
18. Apparatus for supplying to a, combustion
10 device a combustible mixture of airand vapors of
combustion into. and through said ?rst-men
.tioned pipe.
-
a
'
, 22. An apparatus for vaporizing liquid fuels
comprising a vaporizing chamber serving to sup
port a pool of liquid fuel in the lower portion
thereof, aspirating means including a forcing
nozzle connected to said vaporizing chamber,
.a relatively heavy liquid hydrocarbon fuel, said
means for passing hot gases of combustion di
apparatus comprising a_ vaporization chamber,
rectly into and beneath the surface of the pool
of liquid fuel within said vaporizing chamber
whereby vaporization of the fuel is effected,
means for delivering ‘air under pressure through 15
means for maintaining at‘ all times in said va
porization chamber, during the operation of the
15 apparatus, an amount of liquid fuel inexcess of
that which can be vaporzed- by the-hot combus
tion gases employed for such purpose, an air and
vapor mixing device, a passageway connecting
the mixing device and-vaporization chamber, said
20 mixing .device including means for passing air
therethrough so as to have a suction, effect to
said forcing nozzle whereby the fuel vapors are
withdrawn from the vaporizing chamber and
thoroughly commingled with the air, means for
by-passing a portion of the resulting mixture of
air and fuel‘ vapors and burning it whereby hot 20
gases of combustion are formed, and means for
withdraw fuel vapors through said passageway ‘ utilizing said latter hot gases of combustion to
effect the vaporization of additional quantities
and mix the same with said air, a conduit for de
livering the resulting mixture of air and 'vapor to of the liquid fuel disposed within said vaporizing
,'
'
25
the combustion device, a connection between said chamber.
23. Anapparatusforvaporizingliquid‘fuelscom
mixing device and said conduit, a pilot burner,
means for withdrawing a small portion only of prising a vaporizing chamber serving to support
said mixture of air and vapor and delivering the a pool of liquid fuel in the lower portion thereof,
same for combustion at said pilot burner, and aspirating means including a forcing nozzle con
neoted to said vaporizing chamber, means for 30
30 means for delivering the hot products of com
bustion of the pilot burner into the vaporization ‘passing hot gases of combustion directly into
and beneath the surface of the pool of liquid fuel
chamber into intimate contact with said excess of
liquid fuel, whereby to vaporize only a portion within said vaporizing chamber whereby vapor- 7
, thereof, said vaporized portion-being in propor ' ization of the fuel is effected, and means for de
,35 tion to the amount of hot products delivered to‘ livering air under pressure-through said forcing 35
the vaporization chamber.
nozzle whereby the fuel vapors are withdrawn
19. In a“ fuel vaporizing apparatus, a vapor
from the vaporizing chamber and thoroughly
'
Y
chamber, an aspirator including a forcing‘ nozzle commingled with the air._
24. An apparatus‘ for vaporizing liquid fuels
and Venturi tube, means for delivering air at a
40 high velocity through the forcing nozzle, a con ~ comprising a vaporizing chamber serving to sup
nection between the vapor chamber and Venturi port a pool of liquid fuel in the lower portion .
' tube near said forcing nozzle whereby fuel vapor
is entrained with the air and mixed therewith,
means for withdrawing an air and vapor mixture
45 as it leaves the aspirator, a pilot light for burn
ing said air and vapor mixture, means for deliv
ering hot gases of combustion from the pilot
light to the lower portion of the vapor chamber,
and means for maintaining a pool of liquid fuel
50 in the vapor chamber at a level above that at
which said hot gases are delivered. _
'
-
20. An apparatus for vaporizing liquid fuels
comprising a vaporizing chamber for holding a
thereof, aspirating means including a forcing
nozzle connected to said vaporizing chamber,
means for passing hot gases of combustion into
intimate contact with said pool of liquid fuel
within said vaporizing chamber whereby vapori
zation of the fuel is effected, means for delivering ,
air under pressure through said forcing nozzle
whereby the fuel vapors are withdrawn from the‘
vaporizing chamber and thoroughly commingled _
with the air, means for by-passing a portion of
the resulting mixture of air and fuel vapors and
burning it whereby hot gases of combustion are
pool of the liquid=to be vaporized, a pipeleading ' formed, and means for utilizing said latter hot
gases of combustion to effect the vaporization of 55
55 from a source of hot gases of combustion, said
pipe having an'opening beneath the operating
level of the pool of said liquid to be vaporized, a
passageway leading from the vaporizing chamber
to a mixing space, a connection through which
at least} minor proportion of the mixture of air
and fuel vapor may be withdrawn, means for
burning the withdrawn mixture,‘ and means for
leading the‘ resulting hot gases of combustion
into and through said first mentioned pipe.
6,5
21.'An apparatus for vaporizing liquid fuels
additional quantities of the liquid fuel disposed
< within said vaporizing ‘chamber.
.
25. An apparatus for vaporizing liquid fuels
comprising a vaporizing chamber serving to sup
port a pool of liquid fuel in the lower portion
thereof, aspiratinlg means including a forcing
nozzle connected to said vaporizing chamber,
means for passing hot gases of combustion into
intimate contact with said pool of liquid fuel
- within said vaporizing chamber whereby vapor
ization of» the fuel is effected, and means for de
comprising a vaporizing vchamber for holding ‘a
pool of the liquid to be vaporized, a‘ pipe leading " livering air under pressure through said forcing
from a source of hot gases of combustion, said nozzle whereby the fuel vapors are withdrawn
_ pipe having an opening beneath the operating ' from the vaporizing chamber and thoroughly
70
70 level of the pool of said liquid to be‘vaporized, a commingled with the air.
:~> : eway leading from the vaporizing chamber
to a mixing space, a pipe through which a source
' of air under relatively high ‘velocity is supplied,
said latter pipe leading into said mixing space,
a pilot burner for burning a minor proportion‘of
4'.‘ 26. ‘An apparatus ‘for vaporizing liquid fuels
comprising a vaporizing chamber serving to sup
port a» pool of liquid fuel, said vaporizing cham
ber having an opening in the upper portion there
of, means to vaporize said liqiud'fuel, means for 75
l 2,128,887
5
supplying a vstream of
under pressure and ucts of combustion for vaporizing additional
forcing it past said opening whereby the fuel quantities or the liquid fuel-in the vaporizing ' vapors are withdrawn from said vaporizing cham-
chamber.
3
.
.
-,
g
Y
28: An apparatus as defined in claim 27, where
her and entrained in said air stream whereby
thorough commingling of'the air and fuel vapors
in the last mentioned means comprises a pipe
is effected, means for by-passing a portion of the
which serves to carry the hot gaseous products
of combustion beneath the surface of the pool
resulting mixtureof air and fuel vapors ‘and
burning it to produce hot gases of combustion,
of. liquidfuel disposed" within the vaporizing
chamber.
and means for utilizing said hot gases of com
29. In a fuel vaporizing apparatus, a vaporiz-‘ 10
10 bustion tone?ect the vaporization 'of additional '
quantities of said liquid fuel..
27. An apparatus for vapbrizaingtliquid fuels‘
comprising avaporizing chamber serving to sup-j
port a pool of liquid fuel, a passageway leading
~15 from said vaporizing‘ chamber to a constricted
opening formed in a pipe, means for delivering a
stream of air under pressure into and through
ing chamber, an aspirator including a forcing
nozzle- connected "to. the vaporizing chamber,
means for delivering air under pressure through
said forcing nozzle whereby to withdraw vapors
from the vaporizing chamber and entrain the -15
same with the air, means forpassing hot-gases of
combustion of a liquid fuel through a pool thereof
supported in said ‘vaporizing chamber, and means
for burning'gas and passingthe hot products'of
and thoroughly commingled with said stream combustion beneath the surface of saidv pool of. 20
of air, means for by-passing a minor proportion ‘liquid fuel in the vaporizing chamber to initiate
of the ‘resulting- air and fuel vapor and burning vaporization thereof.
v
‘
» CHARLES A. FRENCH.
it to provide hot gaseous products of combustion,
said constricted ‘opening whereby liquid fuel
vapor is withdrawn from said vaporizing chamber
and means‘. for utilizing said not gaseous prod
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