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Патент USA US2119927

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June 7,1938.
F‘ RE";
Filed Dec. 11, 1957
2 Sheets-Sheet l
I I_nvenior
,6 By?w'm
June 7, 1938. . “
Filed D60. 11, 1957
2 Sheets—Sheet 2
I; _ _ _
_ __
. By 1W 5W
Patented June 7, 1938
' Frank Reid, Williams, Minn.
Application December 11, 1937, Serial No. 179,368
3 Claims.
(C1. 123--1V19)
My invention relates to improvements in air
intake and mixing devices for the carburetors of
internal combustion engines.
The object of the invention is to provide effi
5 cient, inexpensive means ‘of the character above
indicated which may be readily incorporated
with present day carburetors as vpart of the
buretor and intakemanifold 4, said unit being
constructed and arranged as follows:
The basic element of the unit 6 is a plate-like
air jet member ‘I ?tting between said ?anges '2
and 3 and having a central aperture 8 therein 5
corresponding in sizewith the bore of ‘the con
duit VI and manifold 4 and registering therewith.
equipment thereof to automatically vary the
mixture drawn from the carburetor in accord
A pair of inlet ports l0, forming'air jets,rare
ance with different operating requirements, as,
for instance, in hot or cold weathenand when
the engine is hot or cold, ‘and which embodies
devices for effectively breaking up particles in
the mixture which have not been completely va
porized and is equipped to thoroughly ?lter'the
spectively, said ports extending tangentially to 10.
auxiliary air,
appear when the succeeding description is read
with reference to the drawings’. accompanying
and forming part- of this speci?cation, it being
understood that the invention resides in vthe de
tailsof construction and combinations of parts
illustrated in said drawings, ‘speci?cally treated
in said description, and de?ned in the claims
appended hereto.
Figure 1 is ‘a ‘fragmentary view in side eleva
tion illustrating a preferred embodiment of the
Figure 2 is a View in top plan, parts showing
Figure 3 is a view in vertical transverselsec
tion taken on the line 3-3 of Figure 2 looking
in the direction‘indicated by the arrows,
Figure 4 is asimilar view taken on ‘the line
4—4 of Figure 2 looking inthe'direction of ‘the
the aperture 8 vand opening thereinto in oppo
site directions on opposite sides thereof but in
a common horizontal plane. Within the member
1 is a fan ll suspended from across bar ‘l2, for
rotation in said plane, by means of a screw bolt 15
I3 passingthrough the hub l4 of said fan and
‘ Other objects more subordinate in naturewill
In said drawings:.—
formed in oppositesides of the member ‘I, re
Figure -5 is a View in transverse section taken
on the line 5-5 of Figure 4 looking downwardly,
40 and
Figure 6 is a View in top plan of the fan mount
Referring to the drawings by numerals, in the
illustrated embodiment thereof my invention has
been shown as applied to a down-draft type of
carburetor, the outlet or discharge conduit l
thereof being shown only since the remainder of
the carburetor is unimportant as regards a
proper understanding of the invention. The con
50 duit i has the usual flange 2 thereon for bolting
to the corresponding ?ange 3 of the usual intake
manifold 4 having the throttle valve 5 therein.
According to my invention an air intake and
mixing unit 6 is interposed between the ?anges
2 and 3, or in other words, between the car
into said bar. 'The cross bar I2 ‘is, part of an
open frame !'5 disposed on the ‘member ‘I and
shown in-part in Figure 6.
Disposed on top
of the frame l5 is a similar frame I6 from the
inner edge of which a plurality of pairs of ‘op
posed baffles lr'l extend into the conduit 1. The
ba?ies l1 and. frame l6 are formed of thin metal,
thebaf?es with shanks I8 terminating in rounded
button-like ends I9 and twisted to dispose said
ends 19 in planes oblique to the horizontal,.the
ends of each ‘pair of baf?es being twisted in oppo
site directions and located in a circular group
concentricto the axis of the fan H. Below the
member ‘l'is av ?lter screen 25 formed ‘of a sheet 30
of any’suitable reticulative' material and. having
its edges interposed between said member ‘and
‘the ?ange 3. The member 1, frames l5 and I6,
and the ?lter screen 20 are clampedbe'tween the
flanges 2 and 3 by means of bolts 2| and nuts 35,
22 thereon arranged at suitable intervals around
‘At one side of the described unit 6 is an air
control unit 23 comprising a closed cylindrical
container 24, of any suitable metal, suspended
from-the ?ange 3, preferably, by means of a
bracket 25 ?xed to and extending from the con
tainer 24 and clamped to the flange 3 by means
of one of the aforementioned bolts 2| and nuts
22. Extending into the container 24, through
the top thereof and at'the side thereof opposite
to the unit 6, is a vertically disposed air intake
pipe 25 spaced slightly at its lower end from the
bottom of said container. Extending from the
top of the container 24, at the side thereof op
posite the pipe 25, is a pair of discharge pipes 26
suitably connected to the member 1 to discharge
air into the aforementioned ports Ill. The con
tainer 24 is designed to contain oil to approxi
mately the level indicated by the dotted line 21 55
in Figure 4. Intermediate the oillevel 21 and
the container ends of the discharge pipes ,26 is a
plate-like splash guard 28 extending from the
wall of the container and suitably secured thereto
in horizontal position.
At one side thereof a
glass sight panel 29 is suitably secured to the
container 24 over a sight opening 35 provided
therein whereby the level of the oil in the con
tainer may be always ascertained. ,
Referring to the operation, under the suction
ized with up-draftlcar'burétors by merely revers
ing the position of the described unit 6.
~ ,
Manifestly other modi?cations, than that above
indicated, may be resorted to- without departing '
from the inventive concept and right is herein
reserved to all such modi?cations falling within
the scope of the subjoined. claims.
What I claim is:
1.‘ The combination with a carburetor ‘and the
‘intake manifold of an internal combustion en
created inthe intake manifold air is drawn into 7
gine, of an auxiliary air supply and mixing unit
the member 1, and, hence into :said manifold,
'in the line of connection between said carburetor .
auxiliary air being cleaned or ?ltered by its pas
member having a plurality of jet forming air in
through air intake pipe 25"the oil in the con—' and. manifold comprising a ring-like member, a_
tainer 24, discharge pipes 26, and ports In, .this vfan vrotatably mounted in said member, said
sage through the oil in thecontainer' 24. Mani; let ports therein adapted under suction created
festly the quantity of auxiliary air introduced into _ in said manifold to discharge jets of air against
the manifold 4 is determined primarily by the said fan whereby the latter is rotated, a plurality
speed of the engine as controlled by the throttle of baffle ?ngers extending inwardly of the mem
valve 5 so that when the engine is running at ber over said fan, and means for introducing aux 20
, high speed, the throttle valve 5 being well open, iliary air to said ports comprising an oil con-j
the quantity of air introduced is increased and tainer through which said auxiliary air is passed.
2. The combination withla carburetor and the
the mixture from the carburetor corresponding
ly thinned thereby conserving fuel as will be intake manifold of an internal combustion en
gine, of an auxiliary air supply and mixingunit
25 manifest. On the other hand as the engine de
celerates under, closing movement of the throttle in the line of connection betweenrsaidv carburetor
valve 5 thequantity of auxiliary air introduced and manifold comprising a ring-like member, a
in the mannerdescribed is cut down. As the fan rotatably mounted in said member, said mem
auxiliary air is drawn into the member 1 byway ber having a plurality of jet forming air inlet
ports therein adapted under suction created in
30 of the ports I!) it issues from said ports in the
form of jetsdirected againstthe blades of the fan said manifold to discharge jets of air against said l~ ;
fan whereby the latter isjrotated, a plurality of
_I I’ and causing rotation of the latter in a direc
baffle ?ngers extending inwardlyof the member ‘
tion to draw ‘or accelerate discharge'of the mix
ture from the conduit‘l. vSuch discharge of the over said fan, and means for introducing aux
um UP. mixture, however, is opposed by the battles H iliary air to said ports comprising an‘ oil container
which, together with the fan ll, tends to break
up particles of gasoline in the mixture. which
have not been completely vaporized in the car
buretor, mixing chamber. Such breakingjup of
the mixture is further facilitated by its passage
through the ?ltering screen 20 as will be clear.
. As will be understood, the oil in the described
air-control unit 23 functions to regulate the quan
tity of air passing through said unit under differ
ent temperatures obtaining. For instance, in
cold weather, when a rich mixture is desirable
for starting and warming up the engine, the oil
is thicker and retards the passage'of air there
through. In warm weather, the oil being thin
ner, there is less resistanceto passage of the air
therethrough as will be clear. ,'
The operation, construction and advantages of
_my invention will, it is believed, be clearly under
stood» from the foregoing-without further ex
It may be stated, however, that although the
invention has ‘been shown and'described as ap
plied to a down-draft carburetor, it may be util
through which said auxiliary air is passed, and
a ?ltering screen in said member below said fan.
3. The combination with a'carburetor and the
intake manifoldpf an internal combustionvlenj
gine,‘of an auxiliary air supply and mixing unit
in the line of connection between said carburetor
and manifold'comprising a ring-like member, a
‘fan rotatably mounted in said ‘member, said
member having a plurality of jet formingair-"ina
let ports therein adapted under suction created 115
in said manifold to discharge jets of ' air against
said fan whereby the latter is rotated, a plurality‘
of baffle ?ngers extending'inwardly of the mem
ber over said fan, and means for introducing aux
iliary air to said ports comprising an oil recep-e
tacle through which said auxiliary air is passed,
.an air inlet pipe extending through the topof
the receptacle into the. oil, conduits extending
between the top of the receptacle and said ports,
and a splash guard in the receptacle between the
level of the'oil and said conduits.
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