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ïocfl 22, 1946. _
2,409,937
J. HUTCHINSON
CARBURETOR ATTACHMENT'
Filed Dec. l2, (1944
l
-
INVENTOR.
Jôb )fu ?cîza'nson
Patented Oct. 22, 1946
2,409,937
m “ UNITED STATES
m
PATENTA `oFFlcE
2,409,937
Y
CARBURETOR ATTACHMENT
Job Hutchinson, Great Neck, N. Y.
p
Application December 12, 1944, Serial No. 567,870
`
2 Claims.
(Cl. 48-180)
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2
The present invention relates to attachments
for carburetors.
It is known that in cold weather automobile
engines are diflîcult to start. A standard method
of facilitating the starting of cold engines is to
cut oli or choke olf the air intake at the car
buretor. When the engine is warmed to a nor
.
shown in Fig. `6 shown fixed between the car
buretor and the intake manifold.
‘ The device shown in Figs. 1 to 5 inclusive is
intended for use on eight cylinder automobiles
and the device shown in Figs. 6 to 8 inclusive is
intended for use on four to six cylinder automo
miles.
In Fig. 8 the normally adjoining parts
mal operating temperature, the choke is released
of the carburetor and intake manifold of a six
and air is permitted ,to enter the carburetor
cylinder automobile are shown, the second -em
thereby providing a leaner explosive mixture.
10 bodiment being sandwiched in between said nor
mally adjoining parts.
The present device is intended to be used in
conjunction with conventional carburetors and
Referring now to Figs. 6 and 7, the device
including carburetors in automobiles which are
therein shown has a pair of upper and lower
not provided with automatic choking means.
plates 10 and a thin gasket III sandwiched in be
Essentially, this invention comprises a device
tween saiö- plates. The overall dimensions of the
for automatically admitting an auxiliary flow of
plates correspond to the dimensions of flange I2
air into the passage through which the explosive
mixture from the carburetor to the intake mani
of the intake manifold and flange I3 of the car
buretor. Screws I4 hold the two plates together.
Oppositely situated holes I 5 in said plates regis
fold passes, when the engine is warm and for
automatically cutting off said auxiliary flow of 20 ter with corresponding holes in the above men
air when the engine is cold.
Its principal object, therefore, is the provision
tioned flanges and accommodate in association
with said flange holes screws or bolts IE6. It is
of a device for automatically rendering the ex
plosive mixture leaner when the engine is oper
these> bolts that hold the device in place between
ating at its normal functioning temperature,
It will be seen that in the center of each said
plate I0 is a somewhat large circular aperture I'I
and that a bridge I8 integral with said plate spans
said circular aperture on a line passing through
thereby providing a better mixture at a considera- `
ble saving of gasoline.
.
said flanges.
`
`
Another object is the provision of a device of
the character described which contains auxiliary
its center. The shape and dimensions'of' circular
automatically operated air supply means and 30 aperture I'I correspond to the cross sectional
auxiliary automatically operated explosive mix
shape and dimensions of passage I9 of the mani
ture mixing means functioning in conjunction
fold and passage 20 of the carburetor through
with said iirst mentioned auxiliary means.
which the explosive mixture normally passes.
These and other objects are attained by mech
When the device is ñxed tothe flanges of the
anism illustrated in the accompanying drawing
manifold and carburetor as shown in Fig. 8, pas
in whichi
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sages I9 and 20 and circular aperture I1 register
Fig. 1 is a plan view of one of the embodiments
with one another.
of the device, partly broken away to expose one
` A pin 25 is ñxed at one‘end to the center portion
of the auxiliary air distributing grooves;
`
of bridge I8 of upper plate I0 and at the other
Fig. 2 is a vertical longitudinal section on the
end to bridge I8 of the lower plate I0. Mounted
line 2--2 of Fig. 1;
on said pin is a self-lubricating bearing 25 and
Fig. 3 is a side elevational view of the device
mounted on said bearing is a fan 2'I, said fan
shown in Fig. 1;
‘being rotatably mounted with respect to pin 25.
Fig. 4 is a perspective view of that part of the
It will be seen in the drawing that a circular
device which is shown in Fig. 2, partly broken 45 groove 28 of a diameter somewhat larger than the
away to expose the auxiliary air distributing
diameter of circular aperture I'I is formed on the
groove shown in Fig. 1;
meeting faces of plates I0 in concentric relation
Fig. 5 is a detailed sectional view on the line
to said circular aperture, the groove on the upper
5--5 of Fig. 1 showing one of the thermostatically
face registering with the groove on thelower face
50 and forming therewith a single groove 29. A pas
controlled valve units;
Fig; 6 is a plan view of a second embodiment of
sage or boring 3U formed in the upper of plates
the device;
I0 provides communication between grooves 28
Fig. 7 is a vertical longitudinal sectional view
andthe atmosphere. A second passage or boring
on the line ‘I-1 of Fig. 6;l and
‘
y
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3| formed in the lower of plates I0 also provides
‘ Fig. 8 isa fragmentary ‘side View of the device 55 communication between grooves 28 and the at
2,409,937
3
4
mosphere. A small depression or ball-valve seat
32 is formed at the atmosphere end of passages
30 and 3| for a purpose which will hereinafter
prises a pair of upper and lower plates 50 which
are substantially rectangular in shape.' The rea
appear.
son for this :configuration is that the normally
adjoining flange members of the carburetor and
intake manifold of conventional eight cylinder
It will be seen in Fig. '7 that gasket Il extend 5
automobiles are of corresponding rectangular
from the edges of plates l0 to the outer circum
shape. In place of circular aperture l1 of the
ference of single groove 29 and not beyond said
groove to circular aperture l1. A space or slit
embodiment first .above described, the present
33 will therefore be formed between plates I0
embodiment has two circular apertures 5I and
'of a depth corresponding to the thickness of 10 52 formedin'each of said plates 50. Bridges
gasket Il, between groove 29 and circular aper
E3 and 54 respectively, span 'the circular aper
tures of plates 59. A pin 55 is fixed to bridges
ture I1. Communication will thereby be elïected
between said groove 29 and said circular aperture I 53 and pin-59 is fixed to bridges 54 in the same
I1. The'function of said slit will hereinafter be
manner and place as pin 25 in the bridges of the
ñrst embodiment.
set forth.
Aiiixed to one of the side edges of the upper of
Mounted on pins 55 and 56 are self -lubricating
plates I0 by means of screw 34 is a bi-metallic
bearings 51 and 53 respectively, and mounted
strip 35 having a freely movable end on which
on said bearings are fans 59 and 60 respectively.
a ball 36 is ailixed. An identical bi-metallic strip
Like> fan 21, fans 59 and 60 are freely rotatable
31 is an‘lxed at one end by means of screw 38 to
relative to their respective pins.
the opposite side edge of the lower of said plates
Plates 5d are separated by means of a thin
l5. It, too, is providedat its freely movable end
gasket 6l which performs the samefunction as
with ka ball 39. YThe choice of metals is such in -
gasket . Il ofthe ñrst described embodiment.
said b_i-met‘allic strips that a change in tempera
ture »will cause outward movement of the free
ends of said strips away from the plates to which
Corresponding to grooves 28 of the i-lrst described
embodiment are C-shaped grooves 62 and 63
formed on the meeting faces of plates 50. They
they are respectively afiixed. It will be noted that
areA concentric with circular apertures 5IV Aand 5'2
when these bi-metallic strips-which of course
andare in registration, respectively, with each
comprise thermostatic members-are in their
other thereby forming grooves 94 and 65 respec
normal uncurved state, their respective balls 36 30 tively. They are not completely lcircular grooves
and 39 rest snugly against seats 32 in said plates,
forthe reason that the close proximity of cir
thereby effectively shutting off communication
cular apertureâ! to circular aperture `52>>renbetween the atmosphere and groove 29 through
ders this impossible. i Like the gasket in thefirst
passages 30 and 3l.
described embodiment, gasket 6! extends from
The device operates as follows: ~
35 the outer edges of plates 50 to ,the Vouter cir
When the engine is cold, or the temperature
cumference of grooves B4 and 55. `In consequence,
of the outside air is below 32° F., the bi-metallic
a narrow Aslit §55V is formed between groove 64
strips 35 and 31 will maintain their normal un
and circular aperture 5l and a second slit,61 is
curved position, thereby maintaining their re
formed between groove 65 and circular aperture
spective ball members in close contact with seats 40 52. These slits are in communication with each
32. When these bi-metallic strips are so situated,
other in the area separating circular aperture
air cannot pass from the atmosphere into and
5! from circular aperture 52. Communication
through passages 30 and 3l. When the tempera
between groove 64 and the atmosphere is pro
ture of the engine increases, however, or when
vided by passage or .boring 19, and communi
the air is warmer than 32° F., bi-metallic strips A U' cation between groove 35 and the atmosphere
35 and 31 will be caused to bend or curl out`
is provided by passage or boring 1|. Eachisaid
wardly, thereby disengaging ball members 316 and
boring is provided at its outer end with a small
39 from their respective seats 32. Communica
-depression or ball-valve seat 12 which corre
tion between the atmosphere and groove 29
sponds in function to ball-valve seats 32> of th
through passages 3|) and 3| would thereby become 50 embodiment first above described.
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established. Since there is communication be
Amxed at one end to the upper of plates 5i)
tween groove-ZQ and circular opening I1 through
by means of screw 13 is a bi-metallic strip 14,
slit-,33, communication between circular aperture
l1 and the atmosphere will be effected by the
departure of balls 36 and 39 from their respective
seats 32. The suction that draws the explosive
and affixed lat one end to the lower of platesA 50 by a means of screw 15 is a bi-metallic strip
16.~ YA ball 11-is ñxed tothe free end ofbi->
metallic strip 14 and a ball 13 is aflixed to the
mixture from the' carburetor/'through passage
freerend of bi-metallic strip‘15.-` Itv will be seen
2i) of the carburetor will also draw said mixture
in Fig. v1 that said bi-metallio strips bend in
through the circular aperture l1 and the mani
both directions. When’it is cold, that is when
fold passage I9. In consequence of said action, 60 the engine is cold, or when the temperature of
airwill'be drawn in from the atmosphere through
the outside air is below 32° F., _the strips bend
passages 36 and 3l into groove 29 thence through
inwardly and cause theirv respective ball mem
slit 33 and finally into circular aperture l1. The
bers to enter into close contact with their respec
newly admitted air will be mixed with said ex
tive seats, thereby eiîectively shutting oif com
plosive mixture’by> the action of fan 21, which
munication between the atmosphere and grooves
fan iscaused to rotate by the same suction which
64 and 65. When the >temperature of the outer
draws the explosive mixture out of the carbu
air rises above 32° F. or when the» engine is
retor and the additional air out of the atmos
warmed up, the bi-metallic strips bend outward
phere.
_
lyl thereby causing their vrespective ball mem
Referring now to the embodiment of the in 70 bers to disengage their respective seats. Air
vention shown in Figs. 1 to 5 inclusive, it will
is therefore free to flow through passages 10
be seen that the basic principle and basic ele
and 1l into grooves 64 and 65 and thence through
Vments of said embodiment are identicalr with
slitsl 69 and 61 into circular apertures 5i and
those of the embodiment ñrst above described.
52. Such flow is induced'asabove mentioned
The fernbodimentnow . under consideration. com 75 bythe suction vof the, engine which draws‘the -ex
2,409,937
5
plosive mixture from the carburetor. The suc
tion also causes rotation of fans 59 and 50 there
by effectively mixing the newly admitted, air with
the explosive mixture.
The embodiments above described are but pre
ferred embodiments of the invention. Construc
fold, an air distribution chamber surrounding
Y said passage and communicating therewith, a
pair of oppositely situated passages which provide
communication between said distribution charn
ber and the atmosphere, a pair of thermostatical
ly controlled valves on said pair of passages which
open at a predetermined temperature to permit
an auxiliary supply of air to be drawn into said
tional modiñcations may be incorporated therein
without departing from the basic principles
ñrst passage through said pair of passages and
thereof. For example, there is nothing critical
about the precise shape of plates l!) and plates lO said distribution chamber, and a freely rotating
fan in said first passage which mixes the auxiliary
50. They may be made to coliform to whatever
supply of air with the explosive mixture, each of
shape the normally adjoining carburetor and in
said thermostatically controlled valves compris
take manifold‘ñanges are fashioned. Other types
ing a 'bi-metallic strip having thermostatic prop
of thermostatically controlled valves may be used
erties, aiîlxed at one end to said attachment and
in place of the thermostatically controlled ball
having a plug affixed to its free end registering
_ valve shown and described. The gasket may be
with the particular passage which the valve con
madeof material that conducts heat well or of
trols.
material that does not conduct heat well, de
2.‘A carburetor attachment for insertion be
pending upon whether it is desired to have both
plates receive heat by conduction -from the mani 20 tween the carburetor and the intake manifold of
an internal combusion engine, said attachment
fold or whether it is desired to have only one
having a plurality of passages through which the
of the plates receive such heat-_the other plate
explosive mixture from the carburetor passes to
being exposed only to the heat of the air. A gas
the manifold, air distribution chambers surround
ket may be interposed ubetween the device as a
ing said passages and communicating with them,
whole and the intake manifold ñange, thereby
secondary passages which provide communication
effectively removing said device from thermal con
between said distribution chambers and the at
tact with the manifold. In such case, the ther
mosphere, thermostatically controlledV valves on
mostatically controlled valves on said devices
said secondary passages which open at a pre
would be subject solely to the temperature con
determined temperature to permit an auxiliary
ditions of the air surrounding them and not to
supply of air to be drawn into said ñrst men
the heat which in the other embodiments is con
tioned passages through said secondary passages
ducted to them from the manifold.
Although a temperature of 32° F. has herein
and said distribution chambers, and freely
rotating -fans in said first mentioned passages
been mentioned, said temperature is not critical,
and the thermostatically controlled valves may 35 which mix the auxiliary supply of air with the
be designed to open at any other temperature.
explosive mixture, each of said thermostatically
controlled valves comprising a loi-metallic strip
I claim:
`
1. A carburetor attachment for insertion be
having thermostatic properties, affixed at one
tween the carburetor and the intake manifold of
end to said attachment and having a plug añixed
an internal combustion engine, said attachment 40 to its free end registering with the particular pas
having a passage through which the explosive
sage which the valve controls.
mixture from the carburetor passes to the mani
JOB HUTCI-HNSON.
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