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June 20, 1950
Filed July 20, 1946 v
2 Sheets-Sheet 1
341% —————— -.—————_——/———————-
é?y '7
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F197 3
64 J 88 33,}
Charles C. h/h/ffaA/ert
June 20, 1950
Filed July 20, 1946
2 Sheets-Sheet 2
72w. 4).
P. x
Patented June 20, 1950
Charles C. Whittaker, Pittsburgh, Pa., assignor to I
Westinghouse Electric Corporation, East Pitts
burgh, Pa., a corporation of Pennsylvania ‘
Application July 20, 1946, Serial No. 685,010 '
24 Claims. (01. 98-18)
My invention relates broadly to centrifugalv ‘
A novel feature of my invention resides in the
‘means for removing foreign particulate matter
use ofthe draftéinducing means for an addi
from air or other gas by cyclonic action; but it
tional purpose or'i purposes. More speci?cally,
is also speci?cally directed toimproved means
the draft-inducing meansicomprises a propeller
of this type associated with a locomotive cab of
which is arranged near the place where the dust
the modern type which has electrical driving
- laden outer portion of the gas is separated from
motors or ‘other electrical equipment requiring a
the inner portion of relatively-clean gas, but in
large steady supply of clean ventilating air.
‘such a manner that a part of the propeller func
A railway car has only limited space, and it
tions to forcibly drive this outer portion of the
is an object of my invention to provide such a 10 gas into and through the'gas-separatingmeans.
car with a, rugged, economical and compact gas- '
This is especially advantageous where the gas
cleaningmeans isassociated with a locomotive,
because the separated-Out air, which is heavily
cleaning means capable of handling an excep
tionally large volume of 'air for its size, and of
smoothly delivering the air, at suitable pressure
and with high cleanliness, to the air distribut
ing ducts which lead to theapparatus requiring
An important feature of my invention resides
dust laden, canbe forcibly discharged through
discharge-openings at the floor of the cab, away
from the air-inlet openings. Another purpose to
_ which the propeller is put is to reduce the whirl
,of the gasreaching it, so that the gas leaving
in providing a locomotive cab with an air-clean
the propeller-bladeswill move more smoothly‘
ing system which takes in air at the roof or top 20 throughvthe ducts which lead the gas away from
portion of the cab, where the air is relatively ' the gas-cleaning means.
much cleaner than elsewhere, as much as two to
Other novel‘ features, innovations, combina
four times as clean as air at, or near, the bottom
tions, subcombinations and methods of my in
of. the cab. Consequently, a degree of cleaning
' vention, in addition to, the foregoing, will be dis
is also obtained by virtue of the location of the 25 _ cernible'from the following‘ description of a pre
air-inlet openings. In the preferred form of my
ferred embodiment thereof as applied to any
invention herein described, entering ‘air travelling
‘electric locomotive cab. This description'is to
be taken in conjunction with the accompanying
somewhat schematic drawings, in which:
sideways along the roof of the cab is effectively
turned downwardly and is caused to swirl, at a
, high velocity, .around a substantiallyv vertical
axis for centrifugally driving most of the par
ticulate matter in the air radially outwardly
Figure 1 is a side elevational view, on a con
siderably reduced scale, illustrating part of a
locomotive cabiembodying my invention,
‘while the air is travelling the distance from the
_ Fig. 2 is a vertical transverse sectional view of
roof of the cab to the bottom of. the cab where
his embodiment, along a plane substantially
the dirt removed from the air is discharged.
35 perpendicular, to the length-direction of the cab,
For convenience and brevity, I hereinafter call
and centrally through the gas-cleaning equip
foreign particulate matter in a gas by some
terms such as “dust” or “dirt,” the terms being
Fig. 3 is a partial sectional view substantially
used generally as embracing any foreign par
along the line III——III of Fig. 2, and.
ticulate matter, and not in their speci?c mean 40 ' Figs.‘ 4 and 5 are horizontal sectional views
. vings of solid earthy matter or the like. -
VA broad object of my invention is to provide
a gas-cleaning system having improved. means
for more quickly causing the incoming gas to
reach a high rotational velocity, thereby .en
substantially long thelines IV-Q-IV and V-V of
Fig. 2respectively‘.v ,
Referring to the ‘drawings, a, locomotive cab
is indic'atedpin Figs. 1‘ and 2' by the reference
45 numeral 2 and icomprisesajroof 4, sides 6 and
abling a decrease in the overall axial length of '
a ?oor 8, carried on an underframe I0 compris
the gas-cleaning equipment. In the speci?c em
bodiment herein disclosed, the equipment com
prises spaced concentric tubes about which the
incoming gas swirls and the improved means 50
comprises gas-de?ectors or vanes which direct"
.the incoming gas most advantageously into the
Additionally, draft
inducing means is provided for forcibly moving
. space between the tubes.
;the gasthrough the gas-cleaning means.
ing suitable‘bars including a lateral supporting
bar 12 which may carry some‘ of the gas-clean-'
ing equipment. The roof 4 issloped in a‘ cus
tomary manner, being convex upward and slop
ing symmetrically to the sides‘of the'cab from
a highest point at the center. _ The lateral sup
porting bar I2 is spaced somewhat below the
horizontal ?oor 8.
Air-intake means for the gas-cleaning equip
ing air flows, is at an appreciable angle to the
general direction in which the air must ?ow
downwardly in the gas-passage. For de?ecting
the air ?owing inwardly in the duct-passages 20
into the gas-passage 52, a plurality of circum
ment is provided at the top of the cab where
the air is much cleaner than elsewhere. It com
prises a wall l4 spaced from but following the
contour of the roof, and provided with what is,
in effect, a central circular edge M’ which abut
ferentially spaced gas-deflectors are provided
tingly receives atubular member, ,a?svwill latter
completelyuaround theI entrance end of the gas
passage.' In the vpreferred'form of my invention
air-inlet openings I6. A pair of spaced upright I , herein described, these gas-de?ectors comprise a
walls is extend laterally across the cab and de- " 10' ‘plurality of upright vanes 54 which extend par
?ne the ends of the openings-ldixjl‘hej‘wallsé l4 ,g.utiallynalonggthe‘wall Hi and partially along the
and !8, together with the roof 4, form substan- vwtopkportion of the tube-section 34, but are the
full height fof the passage for the entering air,
tially horizontal inwardlyedirected .pductmase
sages 2B for air entering ,from each lsi'defoffthe " ' ‘thatiagthe‘y reach‘from the wall H1 or throat
le?portion ?tqto'lthegroof 15. This means that an
cab. Spaced
louversI6.22 These
are providedeacrosns
,louvers, in con
edge of each vane is shaped so as to rest on the
be apparent. l’ The mall‘ 14 terminates at the
sides of the cab to vform horizontally elongated
junction with the slope of theduct-passagesiln, = 3- '»throat *p'ortioniii?; The lateral walls 18 are lon
uagitndinally spaced apart far enough to clear the
keep rain, snow and other heavy weather;pre-_
cipitate from ?owing qwith the gas that passes
nearest vane 54'. by an appreciable distance, so
20, that. ,no _appreeiable.hindrance isv given to .in
‘beyond the .cduetrpassages
"' ‘The vanes‘ 55 nare?arlfainged'tof guide the incom
‘ ing ,alrrallong srnootl'r'?ow-jlinesinto a pronounced
ecieaning mechanism‘ isiirovided ‘extending from
_‘ _the»_,roof 4 , down? to- about1lihe‘?oori‘8gland prefer
, swirl,‘ about,the,iippeiitubeesection"42 cf' the inner
‘spaced coaxial relation, ‘the axis'being vertical;
.,and,.leach ,consists of ,smaller ‘tubes or tubular
“de?ectithepair enteringithe gas-passage toward
ably belowit." ,Ihixmeehanism comprises a pair ' 25 tubularlrnember' ZSibut without‘ driving dust'to
itlra 'ner'tg'ibu ,rniember; To this end, the vanes
. of tubes , or ;_tub,i1l_ar members arranged‘ in nested
.the' inner suriaceof‘the upper tube-section 34 .of
jmernbers _-.which;for the. sake ,of' distinction are alsoX , , "theoutertubularinernber 26. In;v explanation of
‘referred (tofin‘ the following ‘descriptionf'of the" to‘ the-acting, theldashedéline‘circle. A Of Fig-‘,1 may
be‘consideredito’ bathe-‘circle on-the upper tube
,mechan_i_sm, as - rtubees'ections'. .“More ' speci?cally,
,lsectio‘n‘l'sli"'ati'which‘the downstream points 56
‘of ; the vvanesyf?lI‘terminategani1beyond which the
' therco‘rnprehensive tubular ‘members, are referred
.‘g-tofintheir. ,entireties. as an. outer tubular member
V.‘.2B,an,d anlinne'r' tubularmembe‘rl?.
incgmins air ‘is-5129.‘1QI15$17.51lided',by the vanes.
The‘ vanes" are‘ “approximately, “but not quite,
"Theoutertubiilar rnernloer"2_6 comprises ‘a plu-“ '35 “tangent
to‘thiscircle. "If extended, each vane
,rality of jrnergingi tube-‘sections ‘including a .cen
, would lie, on a ehordwhich would be much closer
,trai \tnbeeséctionij'li?; in ‘the jormfof a short hol
?lowcylinder, “a fdownwardlyiflared or§upwardly
to‘ the ' circle
toithe ' concentric circle on
,‘Lta‘p‘e‘red, lower ,tube-section’jaz ‘and an]upwardly-z , Ijtheupper'tubejecticinf?,jlying in the same hori
?ared'or downwardly-tapered uppertube-section " 40"‘5zf'QntaPp1aneifil‘hisucircle
_ 334 having .atopuportiomwhich ?ares sharplyout
,ward as it ImergesintQ'the‘WaH 1'4, _to‘“form a
throat-,portion‘??. "Thejeentral'section 30"is a
,lowersection .withrespect to'ithe upper‘ sectionv 34, I
‘corresponds to that
~-shown in :Fig'.‘ 4'25 representing'fthe‘ inner tu
bulanmernbergt.“ "Thegener'al or average direc
rtionfwhich air-?owing," between two consecutive
vvanes ‘takes is-in-dicated,jin'_=Fig. 4 by- the dashed
"Ifhe inner itub‘ularym'ernb'er ;28 consists ' of sev-v ' 45' 'rline-arr'owB. This'arrpwif ‘extended would not
feral stationary tube-sections and‘ a‘ ‘rotatory tube
section, .so‘that it"is'not?continuo'usjin the sense
ofi'the‘outer tubular vnlemberl?i The inner'tu
.bular member ‘28 :comjprises a‘ narrow‘ rotatable
*interseetj ‘the lcirel'e'l 28' "but would“ clear ‘it, and so
njbe"saidjtobeijapproximately tangent to the
: circle; ,A, for-‘want icf a more "de?nite- expression.
‘necordingly, ‘such; general air-‘flow, shownby the
central cylindrical ‘tube-‘section .38, a lower cylin-‘ -50 " arrowdBjisgintended to heide?ned'in this appli
dricalltnbe-lsection.‘ll?cand' an 'upwa'rdlylj?ared ‘or _ ,c'ationj by the fexpression,,approximately ‘tangent
cidownwardlyétapered upper‘ tube-section‘ 42;‘:1The "to the “inner {v‘snrface' lof‘jthe outer‘ tubular mem
._centralftubejsection?38 is‘also part of ‘a'propeller "‘-_ber._ (‘A's airesulti‘of l'suchgair-gnidance, the in
‘ ‘.40
hollow ‘for receiving
l'electri‘c motor‘ia'
having a shaft so for rotating‘the' propeller‘ 44.
cornin'gfjair, ileaving‘th’e vanesf??l, is guided so as
, _to*'_?_ow close‘ to theinner; surface of the outer tu
“bular "member “2 sgwancureoming ;as' close .to the
. 'The upper tubeesection ‘s2 has the same slope‘ as
“ the upper ‘tube-section ‘3410f .;the outer ‘tubular
l'to "enter-‘along lines;suchas“the arrow‘B, causes
‘:44 having air-foil blades ‘745, "The" lower-section
member ,25, butrjextends ‘beyond it to‘the :roof 4
rwhichvcloses‘rits end-opening.
‘The space‘ between’ the upper‘vtube-s'ections >34
andAZ er the inner and outer‘ tubular'vjmembers
respectively‘ forms a gas-passage! 5.2 " 'whic'lii con
inner tubular member {4 8.1, , Causing the ' gas-flow
' "dustfto'be' projectedj-ontoj the inner surface of
60"the-Iouterjtnbiilarf nienrberfinstead of onto the
“inner tubular member as would be‘, the case if'the
fjvanes' 5t wereornittedvandfair allowed 'to enter
‘-_’;'radially. , _ In‘ accordance "with'_‘;rny - invention, all
'~ ‘of "theinc‘oming air, while _~ca_used' ,to'whirl, is also
propeller i549. "'__Preferably," the, various " tube-jsece 4 65' de?ected wearers? outeritubularimember.
4 ‘ "‘In>»_a»'-recommended embodimentytwo consecu
.tions of the ,tubular members arei'circles ,in‘hori
' tivesvanesqn'ade about the'ls'a'rne angle of about
zontalcrosssection with reference to'_Fig.' 2, re
" '{2i2°wi-th each other .a‘slth‘ey-‘did vwith-the tangents
sulting ,in, a , gas-passage. which is,‘ annular in hori
' atlthepoints‘of the equivalent-of a circle A such
, verges downwardly ‘toward the bla'desid? vof the
zontalv cross section.
When the ,motorAB is energized, ‘the blades‘ £6
induce a draft. downwardly vthrough the ‘gas-‘pas
sagef52. Incoming airis drawn through the air
as shown_in-Fig. 4‘;-which-were nearest these-vanes.
" "Inlthis-ernbodimentjsuch equivalent of the circle
' '_A 'had a vdiameteril‘nithe~¥neighborhoodof 5 feet
intake opening‘ l6,‘ ?ows in‘the,rd,ucts"'2l3v and enters
and a ‘gase‘pafssagle, equivalent to the gas-passage
the, gas-passage {a2 sideways.‘ Theigeneral plane
"c 52 ,- ’ of about 8 "inches between-upper tube-sections.
of ‘the’ duct-passages‘ 20, ' along "which the incom- ' 15
In a"devic‘e having'the aforesaid speci?c dimen
sions, the walls, equivalent to the walls l8,'could
fromthis opening. Air-guiding vanes 88 are pro
clear the vanes by'about 11/2" feet, and incoming
vided in the compartment 82 ‘for smoothly turn
ing thesgas coming'from the conduit 86 into the
air would ?nd a natural pattern in ?owing into
the equivalent of the vanes 54. ‘However, it is to
An important
86. feature of my invention
,resides in
be understood that my invention is not to be ‘
limited to these ?gures or by the recital of them.
Considerable variation is permissible so long as
‘the multiple functions of the propeller 44. It
forcibly induces a draft through the gas-cleaning
'a pronounced whirl is encouraged immediately
equipment, although if desired, this action may
and before the gas comes too close to the inner
be augmentedby a suction in the, outlet-duct86.
tubular member. I
10 However in a locomotive it is preferable for the
' As the air moves downwardly in‘ the gas-pas
. propeller to supply all of the driving force on the
sage towards the propeller 44, the whirl becomes
greater because of the decrease in the radius of
the air?ow lines. The air-borne dust is forced
outwardly toward the outer tubular member 26 15
and is concentrated in an outer part of the ?owing
air. The propeller 44 also causes a more forcible
separation, of the outer layer of the gas from the
inner portion, because its tips are over the dirt
receiving passage 68. Dirt along the lower sur
face ofthe outer tube-section,“ is forcibly pulled
down .and driven into the gas-passage 68; and at ‘
A'dust-laden- outer portion of the air, in which
' thesame time, a positive gas-moving force is ap
the dust has been concentrated, is separated from
plied at the entrance end of the passagev 66 for
the cleaned inner portion by a tubular member 20 producing. a strong scavenging effect which car
or wall which is indicated in its entirety by the
rries the dirtthrough the openings 10.‘ (In one
reference numeral 58. This wall is on the down
embodiment, high gas cleaning and a satisfactory
stream side of the propeller 44 and has an upper
skimmer portion which closely follows, but is in
wardly spaced from, the lower part of the outer
tubular member 26. This wall 58 comprises an
upper wall-member 60, a downwardly-?ared wall
scavenging effect wereobtained by skimming off
between,5% and 10% of the gas.) Finally, the
blades 46 of the propeller are shaped at an angle
to, the horizontal so that their faces, meeting the
oncoming gas,de?ect the gas-?ow and decrease
the swirl of the ‘gas. such use of the propeller
blades permits the height of the equipment ‘to be
reduced because the cleaned gas is introduced into
member 62 and a lower wall-member 64. The
upper wall-member 60 is geometrically similar to
the lower part of the central tube-section 30 of 30
the conduit '86 substantially rectilinearily. With
the outer tubular member 26. This wall-mem
suitably designed apparatus, no stationary vanes
ber 68 has an upper skimmer or air-dividing edge
are required in the conduit 80. However,‘v such
66 which is close to the blades 46 of the propeller
. vanes ‘may be added if desired or as a precaution.
44 but which is radially inwardly spaced from
the extreme tips of the blades so that the tip
portions of the blades overlie the-annular space
between the central tube-section 38 and the upper
wall~member 66. The ?ared wall-member 62 is
geometrically similar to the lower tube-section
82; while the lower wall member 64 is partially
cylindrical and extends below the ?oor 8.
The space between the outer tubular member
26 and the wall 58 provides a dirt-receiving duct
or passage 68 into which the dust-laden sepa
rated-out air ?ows. A cleaned portion of the air
?ows in the space inside the wall 58.
The dirt-laden air flowing in the dirt-receiving
From the foregoing, it is apparent that I'have
- provided a gas-cleaning means which is'especially
advantageous for application to a vehicle such‘as
a locomotive ‘cab. The limited height ‘of a 1000
motive makes it necessary to start the’ swirl of
the air at once, with the‘ air-borne‘dust particles
as near to the ‘outer tubular member as possible.
The gas-de?ectors or vanes 54 produce this‘ e?e'ct
,while the propeller creates a strong draft through
the gas-cleaning equipment. Between the two,
the air can ‘be made to swirl at extremely ‘high
velocities, in the order of 4000 to' 5000‘ feet per
The arrangement of the downwardly sloped
stantially completely annular entrance to the pas
entrance duct-passages 20 and the louvers 22
sage and is guided to two opposite quadrantal dis 50 prevents snow and the like from entering‘ the
charge-openings ll] in the ?oor of the cab by
gas-cleaning equipment when the motor 'is not
de?ectors ‘l2 and 14 which are placed between the
energized. It is for this reason primarily that the
passage 68 is discarded. Such air enters the sub
tube-section 32 and the wall-member 62. , ‘The
remaining quadrants at the bottom of the space
between the tube-section 32 and wall-member 62
are closed by the ?oor 8, as indicated in the lower
right hand part of Fig. 5. Accordingly, the dirt
openings are not provided in the roof of the cab.
Although I have herein described my inven
' tion in connection with a preferred embodiment
in which clean air is provided in a locomotive,
it‘ is obviousthat the gas-cleaning means itself
laden air is discharged below the ?oor 8 and be
can be operated with other gases as well as air.
tween the sides 6 of the cab. An arcuate member
It is also obvious that my invention is subject to
15 may depend from an edge of each opening 10 60 widemodi?cation.
so as to provide an extension 18 of the gas-pas
sage 68, this extension being directed straight
Cleaned air on the downstream side of thepro
peller 44 is received in the space between the wall
58 and the lower tube-section 46 of the inner
tubular member 28, this space forming a conduit
or duct 88 which extends from the edge 86 of the
wall 58 to a plane about in line with the floor 8.
Cleaned air from this duct 80 passes into a com
partment 82 formed by the depending lower wall
member 64 and a horizontal wall 84. The incom
plete cylinder wall-member 64 .is open along a
l _ ._ \Iclaim as my invention:
-. "
A system of a type described for supplying
cleanair fora vehicle having sides, a roof and a
floor, said system comprising air-intake means
having horizontal air-inlet openings; at the sides
of said vehicle and inwardly-directed duct-pas
sages along said roof, a pair of nested spaced
~upstanding round tubular members providing an
upstanding air-passage between said roofv and
70 floor, said air-intake means directing, air into
the-upper part of said air-passage, draft-induc
' .ing and whirl-inducing means in said air-passage
comprising a rotatable air-moving member for
quadrant between the openings 16 andan outlet
" forcing air through'said air-passage, means near
duct 86 for cleaned air extends longitudinally 15 the-bottom of .‘said airy-passage. for separating‘ an
iaboutrsaidiinner tubular memhen?said :draft-in
~o1iter1portion~of 'thelair“?owingzinasaidiiairepas
‘ducingtmeans ‘ comprising :a :propeller with blades
~sa§ge fromi‘rtheirest of therairgtherlastrsaid means
rinsidersaid *LIOWGI‘iSEC?OIITBtLthB lower :end :of said
vegas-passage, {dirt-receiving ‘smeans-on the down
:streamside- of said propeller, and a cleaned-gas
.duct: on the .rlownstre am. side .of :said‘ propeller.
?la?asecleaningyrmeans :icornprising .a :pair 10f
arrested ztubular-jmembers, the outerrone of said
‘members havingzupper, and llowersectionsi?aring
away from a central section, the .uppersection
~and~the inneroneof said :tubular members pro separatenp
posite openings in said ?oor for dischargingfthe
separatedrouterv portion "to' the; atmosphere (‘below ,
said ‘floor, and a 1duct ‘between said :openings:for
‘12. -A' system of a, type -described 'forisupplying
clean air-for a railway-car having a roof zanda
v?oor; said - system ‘1 comprising lair-intake .1 means
ahaving lair-inlet openings along the sideslof said
“railways-car vand ‘duet-passages along said-roof, .a
“pair of nested upstanding tubular? members :be
low said roof providing'an upstandmgairepassage
ividing ‘ a .rggas-passage Itherebetween,
‘51116841185170 the upper end ‘of said gas-passage,
admit-inducing ameans for producing ,a draft
‘therebetween communicating with'said duct-‘pas "15 through :said- zgasr-dpa-ssage with the gas whirling
rial-bout saidlinner-rtubular :member, said draft
sages, ‘said tubular-members i being ibetweenlsaid
inducing means comprising a propeller with
sides, aplura'lity of gas-‘de?ectors ‘at'the'ijunction
rhlaideslinsidersaidi central section, agplurality of
or saidduct-‘passages and-said air-'passage'for
'lvanesrat-theaentrance to "said gas-passage; for di
*directing'e'incoming air from said ‘duct-‘passages
circumferentially ‘about the upper part \of said gozrecting gasrci-rcumferentially about said gas pas
125838,: and a v"skimmer , wall-member between said
air-passage, draft-inducing-means comprising ro
~lower¢section and the inner tubular member,
,-‘-tatable-'bl_ades-at the ibottomiof said air-passage,
~;spaced-,~from both.
skimmer means nearthe tips of said bladesifor
27. Gas-cleaning means comprising an inner
separating an outer layer o'flthe air in-the ‘air
passage fi‘rom an~inner portionof the air, duct 25 tubular :member and ‘an ;outer vtubular member
:‘spaced :‘therefroin, said members having ‘down
means on the downstream side of said blades and
wartdyrtaperednpper sections providing (a gas
extending-along said floor for receiving said inner
therebetween, means at the lower end of
portion'l'oi the air, said blades being formed to
;said; gasepassage iron-establishing a draft through
drive 'the‘air while reducing its whirl.
.3. A system for supplying clean air for-a rail :aosaid ;_gas-.passage,ysaid outer tubular member
comprising ;a lower ‘downwardly flared section,
way car having a roof and-a ?oor, said system
;:means :providing :a gas-inlet about the upper end
comprising air-intake ,means having inlet duct
.ofz-said-ggas-passage,1a plurality of i yane members
passages along'said roof, a pair of nested up
. standing tubular members providing an ‘upstand
:atitheain-let to :said igasepassageiior directing .in
ingair-passage, means-associated with said air
- ,oomingggas approximately tangentiallyintosaid
.gasepassage ;at ;the..;point 10f wgassentry, a down
intake means for directing air about the upper
'wardlyi?arcd-skimmer wane-member between said
circumferential part of said air-passagarmeans
.1 lower ;dowmvardlye?ared :section and “said inner
for inducing admit in said air-passage, means
at'the‘ bottom of said air-passage for separating
out an" outer layer of the air flowing in the air
vztulbular..mernloer, saidwlower section and said
40 walhmember providing a dirtereceiving passage,
“passage, and wall-means providing an upstand
Iin‘g passage ‘ for said ’ separated-out air, said pas
sage extending downwardly ‘ from said ‘ bottom‘of
the inside Loisaid w-allemember providing a pas
:sageio-ricleaned gas.
ci8.'rGas-cleaning means comprising, in com
bination, ‘a
oftnested round tapered tubular
4. Gas-cleaning means comprising, in combie ,7 i.-membersispaced ato::provide a gas-passage there
between which. converges tinia direction trom the
nation, means-comprising a ?rst‘tube and a-sec
inlet/of - said :gasepassage, means .rforrinducing a
0nd tapered tube around and spaced from said
“draft , inv said gas~passage, said means ‘ comprising
‘?rst tube providing a converging gas-passage
via-.cpropelilenhavingiblades spaced from said inlet
which is substantially annular in cross section,
,gaseinlet means at :the large end 'of said gas .50 “and eat ‘the narrow end of said .gasepassage, and
.a skimmer wall‘forminga dirtereceiving‘passage
passage,'.a plurality of “vanes substantially ?xed
in ‘the gas-flow path for-imparting a whirl to gas vhaving a portion extending downstream :from
said propeller.
entering saidigas-passage, 'means for inducing‘ a
1'9. Gasécleaning means comprising, in com
draft through ‘said gas-passage, ‘comprising an
said air~passage to -_an opening in said floor.
‘ aXial-?ow-type propeller having I'bla'des‘, at vthe in L!, '\bination,;~ai.pair;oi nested rounded tubular mem
qother end of said gas-passage, a round gas-divider
wall-‘member having a portion extending down
stream-from said blades, the edge ofisaid wall
iibers :spaced to :pro'videa gas-passage therebe
\‘tWeenEhaVingagas inlet, means ,ior inducing a
draft ‘in’ said gas-passage ‘with the gas whirling
about the inner .ofwsaid tubular ‘members, said
second tube, the space between saidwall-‘member; 60 :meansncomprising an axial "flow propeller hav
ing'l'blades at‘ the eutletend of said gas-passage,
and, said second tube’ providing {a dirt-receiving
?andva tubular skimmer "Wall ‘at the outlet end
passage‘ and space inside said wall-member pro
member being - radially inwardly spaced ‘from said
of said gas-passage, said wall having an edge
'inside of the outer‘of said ‘tubular members for
for the lastsaid-passage, said blades being formed
off a an outer - layer of the ?owing ‘gas.
to reduce‘the Whirl of the gas entering said out 65 '
‘means including that de
let means.
lrined in claim'9 but characterized further by said
5. Gas-cleaning means comprising a pair "of
edge ofssaidx-tubular wall ilbeingiradially inward
> nested tubular members,’ the outer .one of ‘said
from the extreme ztipsvofwthe ‘blades of said pro
members having an upper section and ailower sec
- viding a, passage ‘for cleaned gas, and outlet-means
tion, the upper section cooperating with thelinner ,
pellerxandiclosely adjacent vthe :downsteam side
--one of said ‘tubular members to rprovideian up
“?ll. Gas-cleaning means in accordance with
standing gas-passage .therebetween, a gas-inlet
thatirde?ned in claim'i9 but further'characterized
meanslto the upper end of said ‘,gasepassage,
'byrsaidre‘dge of said tubular wall being adjacent
'r'draiit-inducing means "for?producing .a draft
- “through said gas-passage with the .gas whirling 75-itheznextreme :tipsrgof said ablades, and said wall A
having a portion ‘extending in a downstream di
tubes, said duct-means having a discharge-opem
rection from said edge.
ingpassing-through said ?oor.
._ .
12. A system of a type; described for supplying
clean air ,to-a railway‘ car havingga roof, a floor
and outer sides, said system. comprising a pair
of , nested . upstanding tubular. {members provid
Y‘ , 1
. '20. Gas-cleaning means comprising,» in combi
nation, an inner 'tube,~an' outer tube having an
inner surface around and-spaced from said in
ner tube, thereby providing a gas-passage there
between which is generally ring-like in cross sec
ing an upstanding air-passage therebetween, said
tubular members being between said sides, said
tion, gas-inlet means at one end of said gas-pas
car having, inlet openingsat-tlie top thereof con
sage, means comprising vanes at-said gas-inlet
nected to l' the upper end v'ofvqslaid air-‘passage, 10 means for causing the-gas to whirl about saidin
means for inducing a downward'draft in said
air-passage with the‘air whirling about the in
ner one of said tubular members, said draft-in
ducing means comprisinganyaxial flow propel
ner \tube, a tubular skimmer wall-member on
the downstream side ofsaid vanes and ‘spaced
therefrom a distance in which thejgas- can ?rst
whirl‘ about - said inner tube before reaching said
ler at the bottom of said air-passage, said pro 1-5 wall-member, said wall-member being arranged
peller having blades faced to reduce the whirl
to skim o? an outer portion‘of the gas ?owing in
of the air, skimmer means adjacent the bottom
said gasepassage, and an axial ?ow propeller hav
of said air-passage for separating out an outer
ing gas-moving blades adjacent the upstream
layer of the air ?owing in said air-passage, and
edge of said wall-member.
a duct along said ?oor for receiving cleaned air 20
21. Gas-treating means comprising, in combi
from said air-passage. said skimmer means com
nation, a round central member, an outer tubu
prising wall means forming upstanding dirt
lar member around and spaced from said central
receiving discharge passages leading to openings
member, said members being tapered to provide a
in said ?oor on opposite sides of said duct.
downwardly converging gas-passage therebe
13. Gas-cleaning means comprising, in com 25 tween, gas-inlet means at the large end of said
bination, a pair of nested round tapered tubular
gas-passage, an axial-?ow-type propeller hav
members spaced to provide a converging gas-pas
ing blades in said gas-passage near the other end
sage, means for inducing a draft in said gas-pas
thereof, said propeller being spaced from said
sage, said means comprising an axial ?ow pro
gas-inlet means, a tubular gas-divider wall
peller in a lower part of said gas-passage, and 30 member having an edge adjacent the downstream
a skimmer wall having an edge inside the outer
side of the tips of said blades, said edge of said
wall-member being inside said outer tubular
member and radially inward from the tips of
14. An invention as de?ned in claim 13 but
said blades.
further characterized by anti-whirl vanes ar 35
22. Gas-cleaning means comprising, in combi—
ranged on the downstream side of said propeller.
nation, a ?rst tube, a second tube around and
15. An invention as de?ned in claim 13 but
spaced from said ?rst tube, thereby providing a
further characterized by said propeller having
gas-passage therebetween, gas-inlet means at one
anti-whirl blades.
end of said gas-passage, means for inducing a
16. An invention as de?ned in claim 15 but
draft through said gas-passage with the gas
further characterized by said skimmer-wall edge
whirling about said ?rst tube, said means com
being radially inwardly of the tips of said blades.
prising an axial-flow-type propeller having blades
17. Gas-cleaning means in accordance with
at the other end of said gas-passage, a round
claim 5 but further characterized by anti-whirl
gas-divider wall-member having an edge adja
vanes between said skimmer wall-member and 45 cent the tips of said blades, said edge of said wall
said inner tubular member.
member being inside said second tube, the space
18. Gas-cleaning means in accordance with
between said wall-member and said second tube
claim 5 but further characterized by said skim
providing a dirt-receiving passage, and the space
mer wall being adjacent the tips of said blades.
inside said wall-member providing a passage for
19. A system of a type described for supplying 50 cleaned gas.
clean air for a railway car having sides, a roof
23. Gas-cleaning means comprising, in com
and a floor, said system comprising air-intake
bination, an inner member, an outer tubular
meam having inlet duct-passages along said roof
{member around and spaced from said inner
and air inlet-openings along the sides of the car,
member, said members being flared to provide
a pair of nested upstanding round tubes provid 55 a converging gas-passage therebetween, draft
ing an upstanding air-passage therebetween,
inducing means for establishing a draft through
said tubes being between said sides, the upper
said gas-passage, with the gas whirling about
end of the outer tube being ?ared, means com
said inner member, said draft inducing means
prising a plurality of upstanding vanes for di
comprising a plurality of gas-de?ectors at the
recting air from said duct-passages into the up
large end of said gas-passage, and an axial-?ow
per part of said air-passage with the entering
type propeller in said gas-passage on the down
air flowing through said vanes along lines
stream side of the gas-de?ectors and in a lower
part of said gas-passage, said propeller having
which, if extended, would generally clear the
inner of said tubes and be approximately tan
air-moving blades having faces formed for re
ducing the whirl of the gas.
gent to the inner surface of the outer tube,
draft-inducing means comprising a propeller
24. A system for supplying clean air for equip
having blades in the lower part of said air-pas
ment in a railway car having a roof, a floor and
sage, a cylindrical dividing wall-member adjacent
outer sides, said means comprising air-intake
the bottom of said airepassage, spaced from and
means and an air inlet opening at a side of said
between said tubes, said wall-member termi 70 railway car and a duct-passage along said roof,
nating near but radially inwardly of the tips of
a pair of nested upstanding downwardly tapered
said blades, and an upstanding dirt-conveying
tubular members providing a converging air-pas
duct-means coaxial with said wall-member and
sage therebetween, said tubular members being
extending downwardly from the space between
between said sides, said duct-passage leading to
said wall-member and the outer one of said 75 the top of said air-passage, means for inducing
of said tubular members closely adjacent the
downstream side of said propeller.
with the air whirling about theinner onewofésaid
tupular means; said drafteinducingmeans com
prising- stationary" whirY-inducing vanes at‘ the
junction of said» duct-passage‘-and-iair-passage 5
and an axial‘ ?ow propeller- air thebottomwfé said
air-passage; andj a» skimmen- walk adjacent)‘ and
radially’ inside of-‘the tips- of‘ saidE propeller, said
skimmer wall having-a portion extendihgdown
a‘ downward air draft through said’ air-~passage
The, vfplilowiinet, rejferences are of " record‘in ‘the
?le ofthis patent:
Clarkson _________ __ Sept: 8,1936
Hanson‘ ___________ __ Jan; 3', 1939'
Murphy: ___________ -Dec. 231.19.41
Lincoln __________ __ Jan; 15; 1946
opening an saic'lv ?oor~ for’ providing a» passage
through‘ which- dirtiladen skimmed‘ oil? gas’ can
Rapp _____________ _, Feb. 12, 1935
Hanson ___________ _eJu1y*14, 1942
Appeld'oorn _______ __ May 3, 1945
ward‘ from) the upper edge off: saidiwall be- an 1“
Bernbaum'et ‘a1; _____ Dec: 1'7, ‘1929
Great‘Britain _‘ _____ __ Dec. 7,‘ 1936
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