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oct. 29, 1946.
Fiied June 25, 194e
Patented Oct. 29, 1946
Philip C. Nilles and'Joseph A. Steffen,¢Chi'cag,o, Ill.Application-June25, 1946, SerialßNo. 679,254 _
2- Claims.v
(Cl. 277-60)
This invention relates to improvementsin aux-iliary air furnishing devicesy for internal; combus
tion» and similar motors, having for an objective
toprovid'e a devicev particularly advantageous for
supplying additional quantities-of air to the gas
controlled quantities or Volumes, of air being' ca;
pable of being- discontinued by'mechanicalçmeans;
at the desire or optionof. a user.
Yet- another:r object: of the invention is to: pro-J
vide a-device of thecharacter'mentioned, whose.
elements of construction. are‘so designed and as
eous fuelv delivered t'o- the motor cylinder com
bustion chambers. through its intake manifold
from the motor charge-forming means or car
sembled asv to.- permit convenient. and ready‘acjc'ess
to be hadto its working; parts. for adjustment,I
buretor, whereby tio-complement and- admix with
cleaning, repair or the like.
ai'r to and for admixture with the gaseous fuel>
Other objects of..Y the invention 'will be in; part
the same-and! thus, materially increase'the corn--y 10
obvious and~v in. part pointed out'hereinafter. , v '
bustibilitythereof, hence, insuringv amaximum
In order thatl the invention. and its/mode of’
of firing power efficiencyl and eliminating the
operation may: be understood by thoseskille'dÈ in
presence of' active gaseous tailings which not only*
the art to which it appertains, we.- havey in the»
effect fuel waste but, also, occasion ill-economies
in- that the same find» their `ways intoy the motory 15 accompanying illustrativel drawing andfin the de
tailed following description based thereon, setr
crank case and» detrimentally" dilute-»the lubri
out one possible embodiment of our invention.V
cating oil therein contained.
In the-drawing:
Moreover, it is an object of the invention tof
Figure 1 is a more or less schematicrside view
provide a device of the stated character which",when connected to the motor intake manifold 20 of a combustion motor having its intake manifold
equippediwith the invention;v
and upon operation of suc-liy motorL will function
Figure 2 is al sideelevation ofthe improved de
to automaticallyv supply additional quantities ofA`
Fig. 3 isa longitudinal section> through theî.
ñowing through said manifold from thel motorv
charge-forming device, the volume of such quan
tities of airA being proportionedY or regulated ac
Figure ‘lïisV a transverse section taken on the
line yll`--4 of Figure 3, lookin-gY in the direction inl
which the arrows’point.
so that when the suction increases, as when-thev
Figure 5 is a similar section taken: on the lineY
motor throttle is substantially closed', i. er, the
motor is idling, the supply’of- additional air will' 30 5-5 of Figure 3, looking in the direction inlwhi‘chf
the arrows point.
be proportionately increased in effectual ratio“ to'
Figure 6 is a similar section taken onthe »line
the amount of gaseous fuel 'then being; drawnl
ß--G of Figure 3', looking in the direction inY which:
from the charge-forming device intoythe firing'
cording to the degree of suction in the manifold»,
chambers of the motor cylinders, thus', perfecting
the arrows point. .
Figure '7 is a transverse section» similar to Fig-A
its> combustibili'ty and insuring the attainment 35
ure 6, but wherein the sleeve valve is shown in
and maintenance of> maximum- motor perform
closed position with respect to the air intake ports
ance'and operating economies.
of. the adjacent valve casing, and
Itis, also an object of the invention to'provide
Figure 8 is a transverse sectionv taken on the>
the device with adjustable suction- responsive
means for controlling» or governing resistance to 40 line 8-,8 of' Figure 3,' looking inthe direction'in
which the arrows point.
movementY of the valves of the device in their
Having more particular reference'to the draw
ing, in connection with `which like rcharacters
respective chambers‘andv from their seats; and to
so house suchy means as to afford th'em‘with posi
tive protection from foreign means and disturb
ances of" the particular'adjustments thereof.,
Itf isa further' object of' the invention to' pro’
vide one of" the'lvalve' means>` of. the device with
will> designate corresponding parts throughout,
45 M indicates the intake manifold of‘an >internal
` combustion motor ofthe multiple cylinder type
having` our improved device operatively connect
ed, thereto.
ports so arranged> in its casing' that when pro
gressivev movement of the valve- therein is> effected'
by the application of the engine'created> suction
thereto, proportionately greater ,ory increased
quantities ofv air will be admitted to'. and*v for ad
mixturewiththe. combustible charge flowingfrom
the charge-forming; .device intor the: motor intakev
manifold; the intakingv of- such automatically
The' device is indicated in its en
tirety bythe reference letter D. It` compri‘sesa
casing |„made of metal or,` other suitable; mate;-`
rial, substantially cylindrical in form. Co-ax‘
ially disposed chambers 2 and' 3 are formed in
the longitudinally opposite portions of' said cas
ingv Iy and »open ontoy the adjacentrends of' the
same; a mediauyiccated longitudinauy disposed
ing I and the head of the T-ñtting l, the former
Way 4 being formed in the intermediate portion
of the casing and intercommunicatively connect
may be turned upon the latter, at times, to in
sure absolute huid-tightness of the device, such
for example, as may be required in the instance
ing said chambers 2 and 3. The inner open end
of the chamber 2, i. e., the adjacent end of the
casing I is ground or otherwise prepared to pro
vide av valve seat, the purpose of which will be
presently described, while a plurality of radially
disposed air-inletting ducts, generally designat
ed by the numeral 5, are formed in the sides of
said casing and are so positioned as to communi
of wearing of the engaged elements. Moreover,
by reason of the screw threading of the outer
end of the casing I, it will be understood and
appreciated that the internally screw-threaded
cap 9 may be longitudinally adjusted with re
'spect to said end of the casing in order that the
free end of the portion of the stem I2 may, at
times, be completely housed Iwithin and protect
ed by said cap 9 against interference from for
cate With the inner end portion of the chamber 2,
as shown in Figure 3.
The opposite end portions of the casing I are
preferably externally screw-threaded, as at 6.
Engaged with that screw-threaded. portion 6 of
the casing I adjacent the chamber 2, is a T-ñt
ting or coupling l, having the ends of its head
portion internally screw-threaded and one
thereof engaged with the adjacent screw-thread
ed portion 6 of the casing I. The leg portion of
eign objects.
A second casing I6 is provided the device and
is made of metal or other suitable material, pref
erably in substantially cylindrical form. A
chamber I'I is provided within the casing I5 and
has a perforate wall I8 formed in its normally in
Its outer end is open and is adapted
to be normally closed by the screw-threaded en
20 ner end.
the'~T-ñtting, indicated at 8, has its free end ex
gagement of a closure cap I9 thereover, as is also
ternally Iscrew threaded and thus, provides
shown in Figure 3. The inner end of the Vcasing
means for effecting connection -of said ñtting
I6, i. e., that end provided with the perforate
with an appropriate portion of the intake mani
fold M, by way of a suitable `internally screw 25 wall I8, is externally screw-threaded and is
adapted to be turned into fixed engagement with
threaded opening formed therein. Thus, an op
erating and supporting connection will be eiiect
the remaining end of the hea/d of the T-fitting 'I
in opposed relationship to the casing I. A plu
ed between the devices and the charge-forming
device or carburetor C.
The outer or remaining screw threaded por
tion 6 of the casing I has a cap 9 engaged there
rality of circumferentially arranged air-inletting
30 ducts 20 are formed in the side walls of the cas
ing I6 in proximity to the normally inner por
with, said cap being provided with an externally
tion thereof and as will be noted, upon refer
located opening IIB in its outer side communi
ence to Figure 2, extend over an intermediate
portion of said casing I6. To control communi
eating with the chamber 2.
«A stem valve I2 is arranged within the casing 35 cation between the chamber Il and the atmos
I and as will be noted upon reference to Figure
phere or outside, a sleeve-valve 2| is snugly and
3, its head II is adapted to be normally seat
rotatively engaged over and about the interme
ed upon the ground or otherwise prepared seat
diate portion of the casing I6 and is provided
portion of the body 2 over the open inner `end
with ports generally indicated by the numeral
of the chamber 3 in spaced relation to the afore 40 22, corresponding in number and placement with
said air-inletting ducts 5. A perforate disc or
that of the adjacent air-inletting duets 29. Thus,
plate II’ is engaged and fixedly arranged in the
by rotation of the sleeve-valve 2| to a predeter
open inner end of the chamber 2 and a centrally
mined position, its ports 22 may be registered with
located opening therein slidably receives an ad
the air-inletting ducts 2B. By rotation of said
jacent portion of the valve stem I2 therethrough.
sleeve in an opposite direction, said air-inletting
The valve stern is longitudinally disposed
ducts 20 may be closed. To facilitateY rotation of
throughout chambers 2 and 3 an intermediate
the sleeve-valve 2 I, an arm 23 is fixedly connected
portion thereof being snugly and slidably re
with the same and is adapted to be engaged by a
suitable manually operable motion transmitting
ceived in the way 4. The free or remaining por
tion of the ‘stem I2 extends through the open
means 24 engaged at one end with an outer por
ing I0 in the cap S beyond the chamber Z and 50 tion of said arm 23, as at 25, and having its re
is preferably screw-threaded, as at I3. Engaged
maining or free end extended to a point remote
from said arm 23.
over and about the valve stem I2 is an expan
A cylindrical cup-like valve 26 is snugly and
slidably received in the chamber I'I of the casing
sion type of helical spring I4, whose inner end
has bearing engagement with the inner end wall
of the chamber 2, while its outer end has bear
ing engagement upon a tension adjusting nut l5
turned into engagement with the screw-thread
ed portion I3 of the stem I2. If desired, a lock
I6 and during its longitudinal movement, at times,
therein, is adapted to cover or uncover certain or
all of the air-inletting ducts 20, thus controlling
atmospheric communication with the chamber I 1.
An expansible coiled spring 21 is longitudinally
ing nut I5’ may be turned onto said screw
threaded portion I3 into abutting engagement
60 arranged in the chamber I'I of the casing I6 and
with the tension adjusting nut I5, for an obvi
VIt may be here noted that the positioning of
the free or outer end of the valve stern I2 aligns
one end thereof has fixed bearing engagement
with an adjacent side of the perforate wall I8,
while its opposite end portion is received in the
cup-like slidable cylindrical valve 26 and has
with the opening I Il in the cap 9, as shown in `
bearing engagementwith .its bottom.
ous purpose.
Thus, it
Figure 3.
will be understood that the action of the adaptable
, Due to the mode of connection between the
spring coil'is such that the valve 26 will be nor
screw threaded inner end 6 of the casing I and
mally retained in a position adjacent the outer
the T-fitting "I, it will be understood that rela
end portion of the easingV I6; however, that in
tively longitudinal adjustment may be effected 70 ward sliding movement of said valve in the cham
between these two elements at certain times,
whereby to increase or decrease the internal area
of the chamber thus provided within the head
of said fitting; also, that by reason of this ad
justability between the engaged end. of the eas- .
ber I'I will be permitted.
In order that the valve 26 may have the ex
tent of its outer sliding movement in the casing
I6 limited or regulated as desired or required, we
engage ve, set screw 28 through a screw 4threaded
fuel consumption».l will.y be,~ effected., together- with
a. materially increasedpower: production.
opening-fromthefouterfendsofthe.capa L9., asshown.
infll‘i'gureíärthe _innen endet such ¿set :screw-shaw
'Thar amount. of- air; flowing through. our im
ing bearing engagement withlthe» adiacennportiorr
ofiY the; .cylindrifcalrvaLK/re.,261.2 Consequently, [an
adjustable`A stopi will? beeproyidefd; 'saidl vali/.er 2li.A
proved` dev-ica intothez-motor,y intake. mani-foldv M,.
If. desired,..a locking; orjanrnunlt-_S may;bc§en;--
lated. according; to the degree; of suction, existingV
within thee intake, manifold M-tha't is, thei speedr
it- will be-~` understood; will-[be automatically regu
gagediwith the screwethreadedzportiomof'.the said’;
or character.' of. operation. ofthe equipped' motor.
screw.rv 28 whereby.v to teleasalîaly:.loc_k;'tl1'e¿> latten
inan adjustedpositioni`
In pointrwith this, it Wiilubeunderstoodithatwhen
the,y intake manifold suction decreasesto au pointï
Inf.operationfofîoullimprovedìdeyicefand assumi
ing that Athasarne: .is connectedsto'themQtQn-intake:
manifold, .as hereinbcfore; describeda, when; the.
equipped` motor.I is;operating:v to eifactzwithim the;>
intake: manifold;v M arsuctiore mca'suriizrg;‘slightly4
under "18;.inches-,~ it; willibe seemthatrtheevadvef. 26%
within the casing I6 will be drawnrirrwandlyf-by‘
reasonL ofA theY influenceof-such suction thereupon,
to aposition within: said-»casing where certain of
_ less; than the. resistanceA of'v the. tensioned'coil'ed
spring I4', said. spring: will. immediately~ operatey
to automatically` return-thervalvc- Il' to.` its-closed
is -to.`
the- chamber
inches, said valve lil-` willi have> been returnedg to
its closed.> positionf and` valve 213.2> ,Wi-ll'- operate-in:
the »manner herei-nbeforedèscrib'ed. In: line-withv
this statement, ift williî be understood thatLA the
the air inletting ducts 20 will remain open or un- '
covered. Hence, a sufficient amount of air will 20 spring I4 of the valve Il has its tension so ad
be permitted to pass therethrough into the cas
ing I6 for discharge into the connection 8 of the
justed that when the degree of suction (partial
vacuum) is 18 inches or over, said Valve Il will
be caused to be drawn from its seat in the cham
ber 2 to admit a supply of air, in the manner
gaseous fuel flowing from the charge forming de
vice C. When the degree of suction within the 25 above described.
When an equipped motor is working at high
intake manifold M is well under 18 inches, it will
be seen that the tension of the coiled spring 21
speeds, and under normal labor or stress, it is an
engaging the valve 26 will be sufficient to coun->
established fact that the degree of suction with
teract the applied influence of such suction and
in the manifold M will be decreased and at a sub
to force said valve outwardly in the chamber of 30 stantial minimum. Therefore, under such motor
its casing I6, thus causing the remaining, .or at
operating conditions,_the degree of suction may
T-fitting 1, thus assuring combustibility ofthe
least, a greater number of said air inletting ducts
20, to be openor uncovered. Consequently, great
well be under 18 inches. At such times, it will be
understood that the spring I4 of the valve l I will
retain the latter in its closed position adjacent the
er volume of air, that is to say, air in suflicient
quantities will be supplied through the T-ñtting 35 chamber 2 and that the valve 26 sliding within
the casing IB will then function against the in
1 and its connection 8 to the motor intake mani
fold M whereby to maintain or effect satisfactory
ñuence of the previously tensioned spring 21, to
admit automatically kproportioned quantities of
combustibility of the gaseous charge passing
air through its air-inleting ducts 20 via the con
therethrough to the motor cylinders.
When motor operating conditions different 40 nection 8 of the T-'fitting 1 into the motor intake
manifold M.
from the foregoing prevail in a motor equipped
It will be thus understood that our improved
with our improved device, i. e., when suction
device may be accurately regulated to admit prop
measuring over 18 inches is effected by the pistons
erly proportioned or metered quantities of air so
working in the motor cylinders and is transmitted
to the intake manifold M, combustible or car 45 proportioned that when admixed with the gaseous
fuel flowing through said intake manifold, will ab
burated gaseous fuel will be drawn from the
solutely perfect the combustible properties or
motor charge-forming device or carburetor C
through the manifold M into the combustion or . qualities thereof.
Under certain operating conditions it may be
firing chambers of the motor cylinders. When
this suction reaches a pre-determined degree, i. e., 50 come desirable to employ two or more of our im
proved devices upon the intake manifold of a
a point where it is desirable or advantageous
motor and, of course, such conditions or require
that anr additional or auxiliary supply of air
(other than that furnished by the charge-form
ing device or carburetor C) be admixed with the
gaseous fuel flowing through the intake manifold 55
M to increase its combustible characteristics, it
will be seen that the increased suction will causeV
the valve 26 to be drawn inwardly in its casing
ments are comprehended by the invention.
With pitting or similar deterioration or wear
ing of the valve seats, the valve head Il, or the
slidable valve 26, or its casing I6, access may be
readily had to such parts of the device by merely
removing them from the T-ñtting 1, whereupon
the necessary repairs or replacement of parts, as
I6 against the tension of the spring 21, thus,
closing or covering all of the air inletting ducts 60 conditions require, may be eifected.
Manifestly, the construction shown is capable
20 in said casing I6. At the same time, and
of further modification, and such modification as
by reason of the increased degree of applied suc
is within the scope of our claims, we consider
tion, the valve l I'will be drawn inwardly or away
within the spirit of our invention.
from its seat adjacent the chamber 2. As the
We claim:
result of this opening of the valve Il, a properly
1. An auxiliary air furnishing device of the
metered supply of additional air will be drawnl
character described, comprising relat1vely opposed
into and through the T-ñtting 1 and its connec
casings (each open at both ends), one of said
tion 8 via the air ducts 5 in the casing l. The
casings having relatively opposed chambers in
thus secured additional supply ofair will admix 70 its opposite portions and each thereof opening
with the fuel now flowing through the intake
onto the adjacent end of the casing and a way
manifold M so that when the same is ultimately
formed longitudinally of the casing between the
said chambers communicating with each thereof,
discharged into the combustion or firing cham
one of the chambers having air-inletting ducts
bers of the equipped motor cylinders, a maximum
combustion or firing performance and economical 75 formed in its walls communicating with the same
in proximityto the inner end of said one of the
casings, a valve seated adjacentthe inner end
outer -end of said casing-.and means engaged -with
the»~ respective inner ends ofeach of said casings
of said one of the casings over the adjacent end
of the vcorresponding chamber, a stem on said
for'connecting the same to a manifold.
valve slidably engaging through said Way and hav'
ing its free end portion extended longitudinally
2. An auxiliary air furnishing device, compris
ing relatively opposed casings each having a way
in the inner end thereof and each of said cas'
ings having air-inletting means in its respec
tive Wall beyond its said Way, spring engaged
into the remaining'chamb'er, springs means en
gaging the'valve stem and a portion of said- re
valve means normally seated adjacent and over
maining chamber, means on the free portion of
the'stem outwardly of said spring means for ad 10 the Way of one casing, a spring engaged cylindri
cal 'valve slidably received in theremaining cas
justing the tension of the latter, the remaining
casing having a plurality of relatively staggered
air-inletting ducts formed about its side Wall, a
cylindrical valve slidably received Within said re
ingnormally arranged beyond the air-inletting
openings in said remaining casing, and means
engaging the adjacent> ends of the opposed cas
Y maining casing, means for normally maintaining 15 ings for communieably connecting the same to an
said valve adjacent the outer end of the said
intake manifold.
second casing, a ported sleeve-Valve engaged about
the side wall of said second casing cooperable with
the air-inletting ducts therein, means closing the
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