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Патент USA US2092015

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Sept. 7, 1937.
c. B. PIERCE
'
2,092,015
CARBURE'I‘OR
Original Filed April 7, 1953
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Patented Sept. 7, 1937
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‘2,092,015
PATENT OFFICE
UNITED STATES
‘2,092,015
CARBURETOR
Clayton B. Pierce, Boston, Mass.
Application April '7, 1933, Serial No. 665,003
Renewed December 30, 1936 .
8 Claims.
This invention relates to carburetors and more
particularly to a carburetor having a nozzle so
constructed that the fuel drawn therefrom will
be thoroughly atomized by creating a-turbulence
of the air passing by said nozzle so as to atomize
the fuel instead of allowing the stream of gas to
be drawn into the carbureting passage from the
nozzle in a solid stream.
.
Another object. of my invention is to provide
a carburetor having- a nozzle provided with a
10 ripper edge which distorts the air stream passing
thereby and creates a turbulence so that the fuel
being drawn from the nozzle by the suction of
the engine will ?ow laterally over the top of the
nozzle by a capillary action in order to allow
Q1. the
?lm of fuel to be picked up by the, air and
thoroughly vaporized.
.
.
A still further object of my invention is to'pro~
vide a nozzle which is capable ofbeing used with
20 either what is known in the art as a plain tube
carburetor or what is known in the art as an air
valve carburetor, the construction being such that
nozzle 9 is adapted to be screwed in the ordinary
manner.
I
The nozzle extends upwardly into a Venturi
tube ID and while I‘ have shown my improved
construction of nozzle disposed in a plaintube
carburetor of this kind, I wish it' to be clearly
understood that the form of nozzle herein shown
and described can be used in connection with
any form of charge forming device and placed
in said charge forming device in any position de
sired and thereforeI do not wish to limit myself
to the use of a Venturi tube or to any other par
ticular construction of carbureting passage as I
am fully aware that my form of nozzle can be
placed in the carbureting passage in any posi-'
tion desired so long as it is arranged with the 20
head disposed in the path of travel of air passing
through said carburetor whereby the peculiar
atomizing effect obtained by my nozzle will be '
to out the ?lm of fuel ?owing over the top of
the nozzle in order to thoroughly vaporize the
obtained.
In a companion application executed evendate 25
same.
herewith I show the embodiment of my inven
tion in connection with what is known» as an air
claims.
,
.
,
In the drawing:
~.
tion, through‘ a plain tube type of carburetor
showing a nozzle constructed in accordance with
my invention arranged therein;
a
Figure 2 is a vertical section of the upper por
tion of a nozzle constructed in accordance with
vmy
invention;
~
,
»
'
valve type of carburetor of the Marvel type and
the nozzle is arranged within a particular con
struction of atomizing tube wherein there is a 30
cooperation between the particularconstruction
~
Figure 1 is a vertical section, partly in eleva
1
I
V
. Figure 3 is atop planlview of the same; I
4.0
5. The body, carries a constant level reservoir 6
from which extends a fuel passage 1 which ter
minates in an upwardly extending threaded‘por
tion 8 into which my improved construction of
the air passing therebycreates a turbulence so as
Other and further objects and advantages of
the invention will be hereinafter set forth and
the novel features thereof de?ned in the appended
35
(01. 261—41)
Figure 4 is a vertical section through an upper
portion of- a slightlyv modi?ed form of nozzle;
Figure 5 is a top plan view of the'same;
\ vFigure 6 is a vertical section through a nozzle
constructed in accordance..with my invention
45 showing the head formed detachable and screwed
within the stern of the nozzle; and
of atomizing tube and the particular construc
tion of nozzle, but I have foundin practice that
my nozzle will function to thoroughly atomize
fuel when arranged in a carbureting passage ir 35
respective of the particular formation of. said
passage.
-
-
‘
-
The nozzle 9 is provided with a_ threaded poré
tion II which is adapted to be screwed into the
threaded portion of the upwardly-extending fuel 40
passage, the same ‘being provided with a wrench
receiving face as clearly shown. The stem l2 of
the nozzle is provided with-an enlarged head l3
having a central conical depression id in com
munication with the fuel bore [5 formed therein,
which communicates with the fuel passage it.
Figure 7 is a detail section through .a modi?ed While I have shown the particular construction
form of nozzle with a single ripping edge by form
of forming the fuel passage l6 and the fuel bore
ing the-head with an annular enlargement. I
l5, it is, of course, understood that the particu 50
In the drawing I have illustrated my inven
lar construction of bore l5 and fuel passage 16
tion as applied to a plain tube carburetor of the
conventional type comprising a body I having. a is immaterial so long as the fuel from the con
carbureting passage 2 provided with an air inlet stant level reservoir is maintained at a predeter
mined level within the head which is herein shown
3 controlled by a valve 4. The-outlet ofthe'car
.55 bursting passage is provided with a throttle valve on the dotted lines A-A of Figure 2 which is sub_ 55
2
2,092,015
stantially on the line of the termination of the
bore I5.
The head is provided with an annular ?at
portion IT surrounding the conical recess l4
which is surrounded by a conical or beveled por
tion l8 terminating in a vertical Wall l9 under
cut at 20 to form a ?at face which intersects
a vertical wall 2| which is also undercut at 22
which intersects a vertical wall 23 which is also
10 undercut to form a horizontal face 24 in order
to form a series of annular shoulders gradually
accordance with my invention wherein a fuel
nozzle is disposed in a carbureting passage hav
ing an enlarged head with one or more ripping
edges, the fuel is maintained at a predetermined
level within the fuel nozzle which is at substan
tially the bottom of the recess formed in the top
of the head.
When the fuel flows or is drawn by 10
increasing from the stem to the top of the head,
these faces forming ripping edges for distorting
being drawn out of the nozzle in a slug or a solid
20 straight lines.
.
It will be noted that the undercut portions of
the annular shoulders are substantially at right
angles to the circumferential faces of these an
nular shoulders in order to form a plurality of
25 ripping edges and while in the preferred em
bodiment of my invention I show a plurality of
ripping edges, a single ripping edge as shown
in Figure '7 will create a turbulence so as to
atomize the fuel passing thereby .and therefore I
30 do not wish to limit myself to the use of any
number of ripping edges so long as the nozzle is
constructed with an enlarged annular head pro
vided with a ?at upper surface over which the
fuel flows by capillary action so as to be picked
up by the turbulence created by the ripping edge.
In the modi?cation shown in Figures 4 and 5
the stem 25 of the nozzle is provided with a fuel
passage 26 which registers with a bore 2'! ex
tending through an enlarged head , which is
40 formed by a series of annular shoulders 28 grad
ually decreasing in size from the top of the head
towards the stem in order to form a plurality of
ripping edges, the fuel bore 2i registering with
a conical recess 29 formed in the top of the head
4:5 which is surrounded by an annular ?at portion 3i}
and in this construction the outer circumferen
tial face 3| intersects the horizontal ?at face 30
at substantially right angles while in the pre
ferred embodiment of ,my invention, the circum
ferential face l9 intersects the beveled face at
an obtuse angle, but in practice I have found
that in both forms the fuel is thoroughly,atom—
ized by the turbulence created by the ripping
edges.
v
V
.
In the modi?cation shown in Figure 6 the stem
is formed of a bottom section 32 and a top sec
tion 33 having a head 34 constructed substan
tially as shown in the modi?cation shown in Fig
ures 4 and 5 wherein the head is formed of a
series of annular shoulders which gradually de
crease in size from the top of the head towards
the stem in order to form a plurality of ripping
edges for creating a turbulence of the air passing
thereby.
65
atomize the fuel being drawn therefrom.
In the operation of a carburetor constructed in
suction through the nozzle, it ?rst ?lls the re
cess formed in the top thereof and instead of
the air in its passage thereby whereby turbu
15 lence is set up in order to atomize the fuelwhich
is being drawn out of the nozzleas will beherein
after fully set forth.
These annularly disposed faces form a head
formed of Walls, the intersections of which form
55
turbulence of the air passing the nozzle so as to
,
.
In the modi?cation shown in Figure 7 I show
a nozzle 35 with an annular enlarged head 36
which is provided with a conical recess 3'8 in its
top communicating with the fuel bore 38 and I
wish it to be clearly understood that I do not
wish to limit myself to the number of ripping
edges employed on the nozzle so long as the noz
zle is provided with an enlarged head forming an
obstruction to the passage of air passing thereby
75 so that the ripping edge of the head creates a
stream, it flows by capillary attraction over the
horizontal or upper face of the nozzle and is
then picked up by the turbulence created by
the ripping edge of the nozzle and thoroughly
atomized so that it is delivered into the mixing
chamber or carbureting passage of the charge
forming device in a thoroughly atomized condi 20
tion as all of the heavy particles are broken
up by the turbulence created.
It will be apparent to one skilled in the art
that the enlarged head of the nozzle forms an ob
struction to the air so that the velocity of the 25
air passing thereby is increased and as it is de~
?ected laterally by the under face or faces of
the head, as the case may be, a turbulence is
created which picks up the ?lm of fuel ?owing
over the upper surface of the nozzle and thor 30
oughly atomizes the same.
Applicant is not able to state positively what
actually takes place in the operation of a car
buretor as herein shown and described so far
as the flow of fuel from the nozzle and the im 35
pingement of the air on the flow of fuel over
the edge of the nozzle but has assumed that by
attraction fuel flows over the nozzle instead of
being drawn out of the same in a stream and is
picked up by the eddies of air created. by the 40
ripping edge and he therefore reserves the right
to have any interpretation placed on the terms
used in describing the action of the nozzle after
further experiments have been made, but from
the experiments so far made has found that, cer
45
tain phenomenal results are obtained as when a
carburetor constructed in accordance with his
invention is substituted for other makes of car
buretors on an internal combustion engine, the
horse power is increased as well as the mileage 50
per gallon and that the flexibility of the engine
with a carburetor constructed in accordance with
his,,invention is greatly increased and applicant
is able‘ to use low test gasoline and yet obtain
better results than obtained when a high grade 55
gasoline is used which leads one to believe that
the turbulence created breaks up, the particles
of fuel and thoroughly atomizes the same so that
they are discharged into the air stream in a
thoroughly atomized condition.
60
While I have shown certain details of con
struction, I wish it to be clearly understood that
I reserve the right to make such modi?cations as
will come under the scope and claims of my
patent without departing from the spirit of my 65
invention as I am aware that a carburetor can
be formed of various designs and a nozzle used
constructed in accordance with my invention
which will thoroughly atomize the fuel drawn
therefrom and therefore I do not wish to limit
myself to the use of my nozzle in any particular
type of carburetor.
What I claim is:
1. A fuel nozzle for carburetors comprising a_
stem having an enlarged head formed by a series
3
2,092,015
of annular projections gradually increasing in
size from the stem to the top of the head, the
walls of said projections being arranged at an
angle to one another.
2. A carburetor comprising a carbureting pas
10
flat portion surrounding the annular depression,
the greatest diameter of said head being at the
upper end thereof, the outer walls of said head
being arranged at substantially right angles to
the flat portion of said head and the under faces
sage having a venturi arranged therein, a nozzle
extending into said venturi and terminating at
the most restricted portion thereof, said nozzle
bulence for the fuel ?owing over the upper face
being formed of a head provided with a plurality
of said nozzle.
of annular projections gradually decreasing in
6. A carburetor comprising a casing having a 10
carbureting passage provided with an air inlet
and a fuel mixture outlet, a constant level fuel
reservoir in which fuel is maintained at a prede
termined level, a fuel nozzle disposed in said car~
bureting passage in communication with said
constant level reservoir, said nozzle having an
size from the upper end towards the lower end
thereof, the walls of said projections being ar
ranged at an angle to one another to provide
sharp ripping edges.
3. A carburetor comprising a casing having a
carbureting passage provided with an air inlet
and a fuel mixture outlet, a constant level fuel
reservoir in which fuel is maintained at a prede
termined level, a fuel nozzle in communication
20 with said constant level reservoir having an en
larged head terminating slightly above the level
of fuel in said constant level reservoir, said head
having a vertical bore terminating in‘ an en
larged conical portion surrounded by a hori~
25 zontally disposed ?at portion, the outer vertical
face of said head being arranged substantially at
right angles to the substantially horizontally
disposed ?at portion to provide a sharp ripping
edge for the air passing thereby. '
v
4. A carburetor having a carbureting passage
provided with an air inlet and a fuel mixture
outlet, a constant level reservoir in which fuel is
adapted to be maintained at a predetermined
level, a fuel nozzle disposed in said carbureting
35 passage comprising a stem having an enlarged
head terminating slightly above the level of fuel
in said reservoir, said nozzle having a fuel pas
sage extending longitudinally therethrough in
communication at one end with said constant
40 level reservoir and at its other end with a recess
formed in the top of said head, the head of said
nozzle being stepped and formed of Walls ar
ranged at right angles to one another to provide
sharp ripping edges, said head gradually decreas
ing in size from the top downwardly.
5. A carburetor having a fuel nozzle disposed
therein provided with an enlarged stepped head
having an annular depression surrounding the
‘ fuel passage thereof having a marginal annular
of said head to form sharp ripping edges for
causing the air passing thereby to create a tur
"
enlarged head terminating slightly above the
level of fuel in said constant level reservoir, said
enlarged head being formed by a series of an
nular projections gradually increasing in size
from the stem to the top of the head, the walls
of said projections being arranged at substan
tially right angles to one another to form a plu
rality of ripping edges for the air passing thereby.
7. A carburetor having a constant level fuel 25
reservoir in which fuel is maintained at a pre
determined level, a fuel nozzle for said carburetor
comprising a stem having an enlarged head ter
minating in a plane slightly above the fuel level
in said reservoir, said nozzle having a fuel pas
30
sage extending longitudinally therethrough in
commmunication with said constant level reser
voir at one end and terminating at its other end
in an enlarged conical portion in the top of said
head surrounded by an annular ?at portion, the or C4
outer face of said head being formed at right an
gles to the under face of said head and the fuel
outlet of said nozzle terminating in a plane be
low the upper face of said head. \
8. A carburetor having a constant level reser 40
voir, a fuel nozzle in communication with said
reservoir,
nating in
arranged
reservoir,
said nozzle comprising a stem termi
an enlarged head having its upper end
above the enormal level of fuel in said
said head having its outer wall stepped 45
to form abrupt projections gradually decreasing
in size from the top downwardly forming ob
structions to the air passing said nozzle.
CLAYTON B. PIERCE.
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