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Патент USA US2107653

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Feb. 8, 1938.
2,107,653
J. D. STROBELL
AIR FILTER FOR RAILROAD CARSv
Filed Sept. 12, 1935
2 sheetsésheet 1
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INVENTOR .
John D. Sér06el’i
BY
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ATTORNEYS
Feb. 8, 1938. v
' J. D. STROBELL
'
2,107,653
7 AIR FILTERYFOR RAILROAD vCARS
Filed Sept. 12, 1935
2 Sheets-Sheet 2
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_lIIJl l|tI|l Ji|l?_
INVENTOR
_ Patented Feb. 8, 1938
2,107,653 ’
UNITED‘ STATES PATENT OFFICE
,
2,107,653
: Am r'm'ran Fon asmaosn cans
John D. Strobeil, New Haven, Gonngassignor to I
The Safety Car Heating & Lighting Company,
,
a corporation of New Jersey
,
Application master 12, 1935, ‘Serial No. 40,217
'
.
'10 Claims.
\
((1183-41)
\
This invention relates to an air ?ltering appa
di?lcuities are encountered in installing the ?lter
units themselves and removing them for replace
ment. The filtering units per se must be removed
inlet for‘ railroad cars 'or the like.
every so often for cleaning.v In present construc
ii
One of the objects of this invention is to pro
tions,'these. units are oftenlin poor locations dif- 5
vide an air ?ltering ‘apparatus of simple and ?cult to reachthus necessitating additional labor
sturdy construction and marked operating em
when replacements are 'made. Another object of
ciency. Another object is to provide apparatus this invention is to provide‘ an air ?ltering appa
of the above nature which can be easily and. ratus in which the above difficulties in' addition
ratus and more particularly to apparatus of this
general character designed for use _as a fresh air
0 quickly installed in railroad cars or the like of
standard construction without material alter
ations thereof. Another object is to provide ap
paratus of the above nature capable of ?ltering
a large quantity of air although occupying but a
5 small amount of space within the car. Another
object is to provide apparatus of the above nature
having ?ltering units which are readily accessi
ble and easily removed for replacement or the
to many' others ‘are overcome in a thorough 10
and e?iclvent manner.
_
I
Referring now to the drawings and more par
ticularly to Figure 3, a railroad car generally in-,
dicated at it has the usual roof portion H from
which a clerestory generally indicated at [2 ex- 15
tends, the clerestory comprising'vertical side walls
Ho and a top or roof lib. In the side walls I211
(Figure 3) of clerestory l2 ‘preferably near one
like. Other objects will be ‘in part apparent and
end of the car, I provide a suitable number of
in part pointed out ‘hereinafter.
enclosures g'enerallyindicated at l3, two enclo- 2o
sures being shown herein by way of illustration;
'
-
The invention accordingly consists in the fea
tures of construction, combinations of elements,
and arrangements of parts as will be exempli?ed
in the ‘structure to be hereinafter described and
the. scope of the application of which will be in
dicated in the following claims.
’
these enclosures form fresh air inlet ports I l.
.
. As is more clearly shown in Figure l, clerestory
side wall Ila is provided with an opening ii in
which enclosures ii are mounted and held in*25
position preferably by suitable brackets I 6 or the
In the accompanying drawings in which is like secured to side wall lid, and top - Ito and
shown one of the various possible embodiments bottom lib of the enclosures. Preferably en
of my invention,
. closures II are provided with an outwardly and
Figure 1 is a vertical section of my fresh air downwardly extending front wall portion |3c 30
inlet ?ltering apparatus installed in ‘a railroa
which has a ?ange ltd. Bottom wall [3b of the
‘ car, certain portions of the car being broke
enclosures is provided with a similar ?ange lie
away;
'
and preferably extending between and secured to
Figure 2 is a reduced horizontal sectional view of ?anges lid and Be are suitable screens I‘! or the ,
a portion of the apparatus shown in Figure 1 like; screens I‘! are also secured tothe side walls 35
taken along the line 2-2 thereof; and
III (Figure 3) of enclosures l3.
,
Figure 3 is a reduced side elevation of a por
A plurality of louvers l8 are desirably secured
tion of the railroad car in which my ?lter is to side walls l?f (Figure 1) thus bridging the
installed.
'
2
space therebetween (Figure 1). Louvers l8 pref
Similar reference characters refer to similar erably slope downwardly as viewed in Figure 1 40'
parts throughout the several views of the draw
and are preferably arranged in staggered rela
tion. Each of louvers i8, is provided with an
In order that certain features of this inven
overlapping edge I80 and a downwardly depend
tion may be more easily comprehended, it might ing ?ange lBb to impede the passage‘ of moisture
?rst be pointed out that air ?lters such as are
used on railroad cars have, in many instances,
been a source of inconvenience and expense not
and cinders through the enclosures. Screens I1 45
preferably have a mesh small enough to prevent
the entrance of larger cinders and other foreign
only in the installation but also in subsequent
maintenance. The capacityof many of these
?lters is often inadequate for the fresh air re
quirements of the car and, in many instances,
do not properly ?lter dust and cinders from the
incoming air. Space is at a premium on a rail
road car and the ?ltering equipment should,
Still referring to Figure 1, an air duct generally
indicated at III is connected at one end to fresh
air inlet port I! and at its other end to suitable
therefore. be as compact as possible. Further
air conditioning apparatus generally indicated 55
particles but'not so small as to materially hinder
the normal passage of air therethrough. Ac
cordingly the inner'side enclosures II (Figure 1) 50
form fresh air inlet ports is for car Ill.
‘
7
2,107,0113
at -2|; apparatus 2| may be supported between
brackets22 or the like which are secured to the
car frame in any suitable'manner. Apparatus
2| preferably includes heating ‘and cooling coils
cated at 31. While any suitable number of ?lter
units may be provided, I have shown three by
way of illustration. Thus the end units of the
set of- three are slidably received in supporting
connected to the steam pipes (not shown) of the ' '
channels formed by bracket members 36 secured
car and to suitable cooling equipment (not
to opposite sides of intermediate section 26 and.
- shown) by suitable pipe connections 23 and 24.
Air duct 26 preferably has a larger sectional
area than air inlet ports I6 and the top of the
10 air duct is preferably secured to the inside of
the side wall |2a (Figure 1) at a point adjacent
the top of inlet ports l9 whereas the bottom of
the air duct is secured. to the wall at a point
spaced substantially therebelow.‘ Air duct 26
15 preferably comprises an outer section 25, an in
termediate section 26, and an inner section 21.
Outer section 25 preferably is‘ provided with
?anges 25a and 251) which are secured to wall |2a
of the car and a ?ange 250 secured in any suit
"20 able manner, for example by spot welding, to a
channel members generally indicated at 39 se
cured to the top and bottom of intermediate sec
tion 26 and preferably equidistantly spaced from
the opposite sides of the section and from each 10v
other. Thus channel members '36 conveniently
vprovide a third supporting channel which slid- ,
ably receives the intermediate ?ltering unit 31
of the set of three. }
_v
e
As is more clearly shown in Figure 1, side 15'
brackets 36 extend substantially throughout the
height of intermediate. section 26 and are pro
vided with bottom web portions "381: (see also
Figure 2) which are suitably secured to the bot
tom of section 26 adjacent opening 26 (Figure l) . 20
?ange 260. on one side of intermediate section 26. Brackets 36 are also provided with guide ?anges
36b (Figures 1 and 2) which face each other to
'- Section 26 is also provided with upwardly ex
, ‘tending portions 26b and 26c joined along the top cooperate with channel members 36 to guide and
.
by a portion 26d to ‘form a recessed section 26 the ‘ hold ?lter units 31.
The top of ?lter units 31 conveniently ?t with
25 purpose of which will be described hereinafter.
Extending from the bottom of intermediate in recess 26 formed in the top of section 26.
section 26 are ?anges. 26c and 26!, these two
?anges bordering opening 26 preferably‘in regis
Spring clip members generally indicated at All are
substantially U-shaped (Figure 1) and have one
leg secured, as by rivets 4|, to the bottom of sec- .
try with recess 26. The inner end of intermedi
30 ate section 26 has an opening 36 formedby a top tion 26. The other leg of U-shaped spring mem 30
?ange 26g and a relatively large upwardly ex- ‘ bers 46 have ?anges 46b and a ?nger engaging
tending bottom ?ange 26h.
.
Still-referring to Figure 1. inner section 21 is
providedwith outer ?anges 21a and 21b,‘ ?ange
35 21b being secured in any suitable manner as by
spot welding to bottom ?ange 26h of intermedi
ate section 26. Interposed between sections 26
and 21 I provide a plate or the like generally in
dicated at 3| , thisplate havinga portion 3hr dis
posed between and'secured to ?anges 26g and
portion 460 extends therefrom.
Thus spring
members 46 may be compressed in a left hand
direction as viewed in Figure 1 to permit the
insertion of ?lter units 31 between guide brackets 35
36 and channel members 36, and when the ?lter
unit is in position spring member 46 may be re
leased .to snap over with ?ange 66b thereof ?tting
under the units 31‘ hold them in position.
Thus, as shown in Figure 2, spring members 40
21a of sections 26 and 21, respectively._ The bot ‘46 are provided for the upport of each of ?lter
tom portion of plate 3| is secured in any suitable units 31 and channel members 36 cooperate with
manner to bottom ?ange 26h‘of section 26, plate guide brackets 36 to guide units 31 into and out
of operative position. Thus the units may be
3| also having an opening 32 preferably in regis
try with and corresponding in size to opening 36 easily installed and removed and are securely .45
w in section 26. A portion! 3“) of plate 3| slopes held in position after installation.
.. Filter units 31 may be of any suitable con-y
downwardly and away from opening 32 terminat
ing in a ?ange or; stop portion Ilc. The-inner struction and, as is more clearly shown in Figure
end of inner section 21 is ?anged as at 21c and 1, are not ionly substantially spaced from air
21d, section 21 also having another ?ange or‘ inlet ports I6 but are considerablygreater in 50
stop 21c for a purpose to be described hereinafter. surface area than ports l6. To further ade
quately support ?lter units 31 I provide a closure
_ A support plate 33 (Figure 1) , which may con
veniently be a part of the cabinet (not shown)_ member generally indicated at 62. Closure I2
is preferably secured to a plurality of hinges 43
in which a part of the cooling equipment is 10
cated¢has secured thereto a bracket 36 secured which are in turn attached to the bottom of in .55
‘in turn‘ to ?ange 21c of inner section 21. Lower termediate section 26 (Figure 1). As is more
clearly shown in Figure 2, hinges 63 are each
?ange 21d. of v section 21 is secured to another
bracket 36 and brackets II and 36 are preferably preferably centrally disposed with respect to ?l
secured to and assist in supporting brackets 22 ter units 31. Thus closure 42 extends complete
which in turn support the conditioning element Lvacross opening 26- (Figure 1) in the bottom
2|. Section‘ 21 is preferably open substantially of section 26 and is preferably channel shaped
throughout the bottom portion thereof as viewed (Figure 1) having side portions 42a and 42!) con
in Figure 1 and this opening 15, desirably in com < nected by a bottom portion 420. When closure
62 is in a closed position, portion 62:: thereof
munication with the interior of the car, is pref
preferably rests against ?ange 26a of section 26 65
erably covered by a screen 36 or the
A
Itwillthusbeseen that freshairinlet ports _ whereas portion 42b is preferably slightly spaced
I!‘ communicate with air duct 26 to direct air from ?ange 26)‘ of section 26. A ?ange 42c ex
to conditioning element 2| after being suitably tends-at ‘right angles from portion 42b of the
mixed with recirculated air entering through ' closure and rests against the bottom of section
70 opening 13, all as will be more fully-explained - 26 when the closure is in the closed position.
' To hold the closure 42, as shown in ‘the full
hereinafter.
'
' Referring now to Flgure'2, it may be seen thatv line_position in Figure 1, closed I provide a plu- -
air duct 26 is preferably wider; than inlet ports
I6 and houses within intermediate section 26
75 thereof a plurality of ?lter units generally indi
rality of substantially U-shaped securing brack
ets-4| suitably spaced along section 26 (Figure
27) and having a leg positioned ,to engage portion 75
aromas
lie 01' the closure; suitable bolts 45 extend
As many possible embodiments may be made
of the above invention and, as many changes
might be made in the embodiment above set
wing nut 46.
us when wing nuts It are 'i'orth, it is to be understood that all matter here
tightened against brackets M, the legs thereof inbefore set forth, or shown in the accompany
engage portion 42c of closure 42 and the bottom‘ ing drawings, is to be interpreted as illustrative
‘oi’ section 28 respectively to hold the closure ‘in and not in a limiting sense.
through the bottom of section It and through
brackets 44,
bolts being provided with a
‘ a closed position.
Upon loosening wing nuts 46,
I claim:
.
' securing brackets 44 may be moved out of their,
I. In apparatus or the character described, in
10 securing position and closure I2 swung down
combination, a car having a clerestory, means 10
wardly into the dotted line position shown in’ forming an air inlet port in said clerestory, an
Figure 1, thus permitting access to ?lter units 31. enclosure within said car opening into said port, -
Referring now to Figures 1v and 2, I provide a
plurality of eyelets 41 which have base portions
15 ~l'la secured to bottom‘ ?ange 2th of interme
diate section 28 substantially adjacent opening
30. As is best shown in Figure 2, a rod 48 ex
tends through eyelets 41 and is secured to a
damper, I! in any suitable manner. Preferably
20 one end “a of, rod 48 extends from section 21‘
(Figure 2) and is provided with suitable grip
ping suriaces for any suitable handle or oper
vating mechanism (not shown). Damper 49 is
preferably provided with suitable openings 490;
25 thus when the damper is in its bottom-most po
sition and ‘resting against stop or ?ange Tie
(Figure 1), its pipes, 23 may protrude there
means forming an outlet from said enclosure,
means forming an inlet port from the interior
of said car into said enclosure adjacent said out 15
,_ let, and ‘a single damper disposed within said
enclosure adjacent said inlet port and said last
mentioned outlet and adapted to regulate the
mixture of air which has entered from said port
and said opening before it exits-.irom'said en 20
closure.
1
-
2. In apparatus of the character described,
in combination, means i'orming an enclosure,
means forming a plurality of air inlet ports into
said enclosure, said enclosure having a plurality 25
‘of. channels running, .suMantially parallel to
said ports, a ?lter unit disposed in each of said
through. When the damper is in its topmost channels, a damper hingedly connected to said
position (the dotted line position in Figure 1) GIICIOSilI‘E‘Md located on the far side of said
-30 it rests against stop or ?ange lie on plate 3|. ‘units with respect to said ports to regulate the 30
Thus it may be seen that damper 49 may be passage of air through said ?lter units, and a
operated to shut oil’ completely the in?ow of plurality oi catch members connected to said
fresh'air ?owing through fresh air inlet ports enclosure and adapted to hold said ?lter units
I! and thence through opening 30, or to shut o? in said position.
35 recirculated air coming through screen 36 (Fig
3. In apparatus of the character described, 35
ure 1). Furthermore, the damper may occupy in combination, a car having a roof, a clerestory
any desired intermediate position to provide the extending from said roof, means forming a fresh
desired mixture of fresh and recirculated air, air inlet port in said clerestory, a plurality of~
all according to the requirements within the car. . louvers disposed within said port, said louvers
40 It will be noted that'thermostatically controlled being formed and arranged to_ permit the free 40
mechanism 'may be connected to rod‘ 48 to con-‘ passage of air therebetween and to impede the
trol the position of damper it automatically.
passage of foreign particles and moisture, an
Itv may now be seen that as i'resh'air enters
enclosure it (Figure 1) through screen ll, it
45 passes between the interstices of louvers l8 and
any large particles not stopped by screen I1 and
some 01' the moisture which may have passed
air duct in said car connected to said inlet port,
?lter units in said air duct across the path of
air ?owing from said port and'having a capacity
at least as great as that of said port, a damper
member associated with said enclosure and op
.therethrough impinges against the louvers and ' erable to control the amount of air ?owing
drops therefrom to the bottom of enclosure l3. therethrough, and an air conditioning element
50 When, however, ?ner particles of dust or foreign arranged and positioned to condition the air
matter ?ow with the air through ports is, they ?owing through said enclosure from said units. .
4. In apparatus of the character described,
are ?ltered out as the air passes through ?lter
units I1. Thence the ?ltered air passes in vary
in combination, a car having a roof, a clerestory
ing amounts through openings Ill and 32, accord- ‘ extending from said roof, means forming a fresh
'ing to' the position of damper 49, into section 21 air inlet port in said clerestory, a plurality of
where the fresh air and recirculated air is mixed louvers disposed within said port, said louvers
and directed through conditioning element 2i
from whence it passes into the car. It will thus
be seen that the effective surface of ?lter units
31 is substantially larger than the area of inlet
ports l9. Hence the ?lter units 31 can accom
modate all the air entering the car by way of
the inlet ports and may be used for a greater
being formed and arranged to permit the free
passage of air therebetween and to impede the
passage of foreign particles and moisture, an air
ductin said car connected to said inlet port,
?lter units in said duct across the path of air
flowing from said port and having a greater sur
face areav than the area of said port, resilient
catch means in said duct to hold said units in
position, and an air conditioning member in said
length of time before removal for cleaning be
comes necessary. Furthermore, it will be seen
that this‘ apparatus is compact so that it may
enclosure and located to receive said air after
occupy a small amount of space in the car.
it passes through said ?lter units.
Fur
ther still, the ?lter units 31 may be easily replaced
by opening closure 42 and releasing spring
.70 catches "as explained more fully above.
Accordingly I have provided an air ?lter ap
paratus which is thoroughly practical and em
cient in operation and in which the several ob
jects hereinabove set forth in'addition to many
75 others are successfully achieved.
.
'
5. In apparatus of the character described, in
combination, a railroad car having an air inlet
port formed therein, means forming a conduit 70
having one end connected to said port, air con
ditioning apparatus located substantially at the
opposite end of said conduit, air ?lter means dis
posed in said conduit and blocking the path of air
?owing from said ‘port to said apparatus so that iii
I
.
2,101,053 7
the air must pass therethrough, means-forming
another air inlet port into said conduit from the
commodate the passage of fresh air, means form
ing a port‘ in said air duct for recirculated air.
interior of said car and located on the far side
and a damper member operatively» associated
of said air ?lter means with respect to said ?rst
with said air duct and operable to close said fresh
air port or said recirculated air port, said damper
member‘ also being operable to assume various
positions between said fresh air port and said
recirculated air port whereby they amounts of
fresh air and recirculated ai‘r passing said damper
member may. be controlled at will.
10
9. In apparatus of the character described, in
' mentioned port. and means associated with said
conduit and shaped to regulate the ?ow‘of air
to said air ‘conditioning apparatus from both
of said
_
6‘. In apparatus of the character described, in
10 ‘combination, a railroad car having an air inlet
port formed therein, means forming a conduit
having one end connected to said port, air con
ditioning apparatus located substantially at‘ the
opposite end of said conduit, air ?lter means
15 disposed in said condult'and blocking the path
of air ?owing from said port to‘ said apparatus
so that the air must ‘pass therethrough, means
combination, a car, means forming a fresh air
inlet port in a wall of said car, an air duct in said
car connected to said inlet port, means forming
a port associated with said air duct to accom 15"
modate the passage» of fresh air, means forming‘
a port in said air duct for recirculated air, a
forming- another air inlet port into said conduit ' damper member operatively associated with said
from the interior of‘ said car and located on the
20 far side of said filter means with respect to said
?rst-mentioned port, and damper means dis
posed between said ?lter means and said second
mentioned inlet port and draped to regulate the
flow of air to said air conditioning apparatus
25 from both or said ports, said ?lter means hav
ing a capacity at least as great as that of said
?rst-mentioned inletport.
7. In apparatusof the'character described, in
combination, a railroad ,car having an air inlet
30
port formed therein, ‘means forming a, conduit
having one'end, connected to said port, air con—
ditioning'apparatus located substantially at the‘
opposite end oi said conduit, air?lter means
disposed in" said conduit adjacent to but spaced
35 from said air inlet] port, said ?lter means being
adapted to block the path of air'?owing through
I said inlet port and said conduitso that the air
. must pass through said ?lter means, means for
introducing vitiated air from the interior of the
car into ‘said conduit and means in: said con
duit located on the far side of said ?lter means
air duct and operable to elose said fresh'air port
or said recirculated air port,v said damper mem 20
ber also being operable to asume various p0si+
tions between said iresh air port and said recir
cuiated air port whereby the amounts of fresh air
and recirculated air passing said damper member
may be controlled at will, and air ?lter means in 25.
said air duct positioned to ?lter fresh air before
it ?ows through said fresh air port.
10. In apparatus of the character described», in
combination, means forming an air conduit hav
ing a fresh air inlet at one end, means forming
a port associated with said conduit to accom
modate the passage of fresh_air._means associated
with said inlet for removing relatively large for
eign particles from the air as it enters said inlet,
means operatlvely associated with said conduit 35
for removing relatively minute foreign particles
from the air ?owing through said inlet, means for
altering the temperature of the air flowing from
said conduitsmeans for introducing vitiated air
intos'aid'cbnduit from the interior of said car, 40
and a_ damper operatively associated with said '
with respect to said inlet port for varying at vwill
conduit and operable to close said fresh" air port
the amount of fresh and vitiatedalr ?owing to . or said last-mentionedmeans, said damper mem
said air iconditioning apparatus“
ber also being operable to assume various posi
8. In apparatus of the character described, in tions between said outlet fresh air-and said last 45
45
combination, a car, means forming a 'fresh air mention'ed means whereby the amounts of fresh
inlet port in a wall'of said car, an air duct in air and vitiated air passing said‘ damper may be
said car connected to said inlet port. means form-_
ing a port associated with/said air duct to ac
controlled at’ivill.
-
-
.
.
-
JOHN D. s'rRoBELL.
cERrrFIcArE or CORRECTION,‘
Patent I No.
107
Feb-may‘ 8 ," ‘i958 .
53 e
‘ -
Join: 'D.-" ,STR'OBELLK Y_
It is hereby jcertifie'dthat error ‘Appears in the printed specification
of‘ the aboizemmbered patent requiring-correction as follows: .Page 2, second '*
, column, dine 141; for: "upport" read support} 3 page , secondcoiumn, line >
‘17-18, claim 1 ,"fstrike" out the‘ 'yword fleet-mentioned! and insert the same '
before "inlet" , line 17; ‘page 14,; second column‘, ' line'ii'j, c1ai1'nl0,'for the. I
I words \?outlfet “fresh air" read fresh air port‘; and
the said Letters
- Pa'tent- shouldbe read tutu this dorrection ‘therein thattlie
same may con-5 i
form to‘ the record of‘ the case
the Patent Office;
._S1gned andsealed this 22nd day'of November; A. p. 1955.‘ '
Henry Van Arsdale
(Seal) '
Acting Commissioner of‘ Patents.
I
.
2,101,053 7
the air must pass therethrough, means-forming
another air inlet port into said conduit from the
commodate the passage of fresh air, means form
ing a port‘ in said air duct for recirculated air.
interior of said car and located on the far side
and a damper member operatively» associated
of said air ?lter means with respect to said ?rst
with said air duct and operable to close said fresh
air port or said recirculated air port, said damper
member‘ also being operable to assume various
positions between said fresh air port and said
recirculated air port whereby they amounts of
fresh air and recirculated ai‘r passing said damper
member may. be controlled at will.
10
9. In apparatus of the character described, in
' mentioned port. and means associated with said
conduit and shaped to regulate the ?ow‘of air
to said air ‘conditioning apparatus from both
of said
_
6‘. In apparatus of the character described, in
10 ‘combination, a railroad car having an air inlet
port formed therein, means forming a conduit
having one end connected to said port, air con
ditioning apparatus located substantially at‘ the
opposite end of said conduit, air ?lter means
15 disposed in said condult'and blocking the path
of air ?owing from said port to‘ said apparatus
so that the air must ‘pass therethrough, means
combination, a car, means forming a fresh air
inlet port in a wall of said car, an air duct in said
car connected to said inlet port, means forming
a port associated with said air duct to accom 15"
modate the passage» of fresh air, means forming‘
a port in said air duct for recirculated air, a
forming- another air inlet port into said conduit ' damper member operatively associated with said
from the interior of‘ said car and located on the
20 far side of said filter means with respect to said
?rst-mentioned port, and damper means dis
posed between said ?lter means and said second
mentioned inlet port and draped to regulate the
flow of air to said air conditioning apparatus
25 from both or said ports, said ?lter means hav
ing a capacity at least as great as that of said
?rst-mentioned inletport.
7. In apparatusof the'character described, in
combination, a railroad ,car having an air inlet
30
port formed therein, ‘means forming a, conduit
having one'end, connected to said port, air con—
ditioning'apparatus located substantially at the‘
opposite end oi said conduit, air?lter means
disposed in" said conduit adjacent to but spaced
35 from said air inlet] port, said ?lter means being
adapted to block the path of air'?owing through
I said inlet port and said conduitso that the air
. must pass through said ?lter means, means for
introducing vitiated air from the interior of the
car into ‘said conduit and means in: said con
duit located on the far side of said ?lter means
air duct and operable to elose said fresh'air port
or said recirculated air port,v said damper mem 20
ber also being operable to asume various p0si+
tions between said iresh air port and said recir
cuiated air port whereby the amounts of fresh air
and recirculated air passing said damper member
may be controlled at will, and air ?lter means in 25.
said air duct positioned to ?lter fresh air before
it ?ows through said fresh air port.
10. In apparatus of the character described», in
combination, means forming an air conduit hav
ing a fresh air inlet at one end, means forming
a port associated with said conduit to accom
modate the passage of fresh_air._means associated
with said inlet for removing relatively large for
eign particles from the air as it enters said inlet,
means operatlvely associated with said conduit 35
for removing relatively minute foreign particles
from the air ?owing through said inlet, means for
altering the temperature of the air flowing from
said conduitsmeans for introducing vitiated air
intos'aid'cbnduit from the interior of said car, 40
and a_ damper operatively associated with said '
with respect to said inlet port for varying at vwill
conduit and operable to close said fresh" air port
the amount of fresh and vitiatedalr ?owing to . or said last-mentionedmeans, said damper mem
said air iconditioning apparatus“
ber also being operable to assume various posi
8. In apparatus of the character described, in tions between said outlet fresh air-and said last 45
45
combination, a car, means forming a 'fresh air mention'ed means whereby the amounts of fresh
inlet port in a wall'of said car, an air duct in air and vitiated air passing said‘ damper may be
said car connected to said inlet port. means form-_
ing a port associated with/said air duct to ac
controlled at’ivill.
-
-
.
.
-
JOHN D. s'rRoBELL.
cERrrFIcArE or CORRECTION,‘
Patent I No.
107
Feb-may‘ 8 ," ‘i958 .
53 e
‘ -
Join: 'D.-" ,STR'OBELLK Y_
It is hereby jcertifie'dthat error ‘Appears in the printed specification
of‘ the aboizemmbered patent requiring-correction as follows: .Page 2, second '*
, column, dine 141; for: "upport" read support} 3 page , secondcoiumn, line >
‘17-18, claim 1 ,"fstrike" out the‘ 'yword fleet-mentioned! and insert the same '
before "inlet" , line 17; ‘page 14,; second column‘, ' line'ii'j, c1ai1'nl0,'for the. I
I words \?outlfet “fresh air" read fresh air port‘; and
the said Letters
- Pa'tent- shouldbe read tutu this dorrection ‘therein thattlie
same may con-5 i
form to‘ the record of‘ the case
the Patent Office;
._S1gned andsealed this 22nd day'of November; A. p. 1955.‘ '
Henry Van Arsdale
(Seal) '
Acting Commissioner of‘ Patents.
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