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Патент USA US2132165

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Oct. 4, 1938.
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_
F_ B, HENRY
2,132,165
FOUNDRY SAND CONDITIONING APPARATUS
Filed Dec. 13, 1935
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Fred 5. Henry,
_
-
“I
F459. 3
BY
MM‘ w W,
ATT'Y
Oct. 4, 1938.
2,132,165
‘F. B. ‘HENRY
FOUNDRY SAND CONDITIONING APPARATUS
Filed Dec. 13, 1935
5 Sheets-Sheet
2
fAj/vENTOFx’:
Fee’ 5. Hen/"y, I
BY
U.
m:
ATT'Y
.
Oct. 4, 1938.
2,132,165
F. B. HENRY
FOUNDRY SAND CONDITIONING APPARATUS
Filed Dec. 15, 1935
3 Sheets-Sheet
5
//\/ VE/Y TOR .
Fred 5 ?enry)
BY
A7754
Patented Oct. 4, 1938 .
' 2,132,165
UNITED :STATES PATENT OFFICE
‘
2,132,165
FOUNDRY SAND CONDITIONING APPARATUS
Fred B. Henry, Columbus, Ohio, assignor to The
Jeffrey Manufacturing Company, a corpora
tion of Ohio
Application December 13, 1935, Serial No. 54,294
11 Claims. (Cl. 209-320)
My invention relates to portable foundry sand frame 8. The protecting canopy l5 may be rig
conditioning apparatus adapted for use in small
foundries or in foundries where complete condi
tioning plants of the stationary type are not used,
idly connected to the frame H and the steering
post l2, as shown in Fig. 4. A drawbar l6 pivoted
at I‘! to the steering post I2 is provided at the
and one of the objects of the invention is the ' front end with a pulling handle l8, as shown in
provision of improved and e?icient apparatus for Figs. 1 and 2.
screening foreign material from used foundry
Used foundry sand may contain such foreign
'} sand and aerating the screened sand for re-use in materials as pieces of metal of various shapes and
foundry work.
10
-
sizes, refuse, etc., and also caked lumps of sand,
.
Another object of the invention is the provi
sion of improved apparatus for separating ceré
tain materials and directing the same to conven
ient locations for ef?cientrhandling.
‘
Another object of the invention is the provi
sion of a sectional ?ail for aiding the reduction
of large particles of foundry sand into smaller
particles.
'
Still another object of'the invention is to pro
vide a grating to separate large size foreign mat
20 ter from the foundry sand as it is fed to the sand
conditioning apparatus.
A further object of the invention is to provide
an adjustable de?ector to guide the sand to a
pile or windrow.
Other objects of the invention will appear
[3 VI
hereinafter, the novel features and combinations.
being set forth in the appended claims.
In the accompanying drawings,
Fig. 1 is an elevation of my improved portable
30
foundry sand conditioning apparatus;
Fig. 2 is a plan view of the structure shown in
Fig. 1;
Fig. 3 is a rear view of the structure shown in
and moreover a pile of used foundry sand on the 10
foundry ?oor may be wet ununiformly at the
bottom and therefore not in condition for use un
til after having been mixed and aerated. When
‘ the material from such pile is shoveled into the
hopper l9 while the apparatus shown in Fig. 4
is being operated, the foreign material will be
transferred continuously to the transverse chute
20, and the usable foundry sand will be directed
to the ejector mechanism for aerating and mix
ing the sand and throwing it along the open bot 20
tomed inverted chute 22 out from the rear end
of the machine through the atmosphere into a
pile remote from the machine.
The hopper I9 is mounted on a supplemental
frame 23 which in turn is mounted on the main 25
frame 8 so as to be longitudinally tiltable rela
tively thereto. Preferably, two pairs of spaced
apart springs 24, 24 are mounted on opposite side
of the supplemental frame 23. Each of the
springs 24 may be retained in place by means of 30
an inverted cup-shaped bracket 25 which is bolt
ed at 26 to the inner wall of the supplemental
frame plate 23 in position for the cylindrical
Fig. 1;
boss 21 to project into the upper end of the
Fig. .4 is an enlarged longitudinal sectional ele
vation of the portable out?t shown in Figs. 1
and 2, taken on the line 4-—4 of Fig. 3, looking
spring 24. A horizontal bracket 8' projects in
in the direction of the arrows;
Fig. 5 is a transverse sectional elevation taken
40 on the line 5—5 of Fig. 1, looking in the direc
tion of the arrows;
Fig. 6 is an enlarged perspective view of the
sectional ?ail; and
Fig. 7 is a detail taken on the line ‘I, ‘l of Fig. 4,
looking in the direction of the arrows and show
ing the latching means for the adjustable de
flector.
Referring to Figs. 1 to 4 inclusive, it will be
seen that the portable sand conditioning appa
ratus comprises a vehicle having the main frame
8 mounted on the rear wheels 9, 9 and the front
steering wheel ID. The single front wheel I0 is
mounted on a frame I I having a vertical steering
post I2 with a reduced portion l3 journaled in
55 the front bearing l4 at the front end of the main
35
wardly from one of the sides of the frame 8 in
position to receive the lower end of the spring 24.
The head 28 of a bolt 29 may be used as a re
taining boss for the lower end of the spring 24.
The lower edges of the cup-shaped brackets 25 40
are spaced sui?ciently above the bracket plates 8’
to permit longitudinal tilting of the supplemental
frame 273 relatively to the main frame 8.
Secured to the supplemental frame 23 is a
hopper 30 located below the screen 3| so as to 45
move bodily therewith. In order to reinforce the
screen and keep the same from sagging, a longi
tudinal bar 32 may be secured at its ends to the‘
upper ends of the hopper 30 midway between the
sides of the screen 3|, as shown in Fig. 5.
Welded to vthe inner side walls of the hopper
H! are abutment plates 33, 33 as shown in Figs. 4
and 5. , Longitudinal strips 34, 34 welded to the
longitudinal edges of the screen 3| may be locat
ed on the horizontal edges 35, 35 of those portions
2
2,182,166
36' 36' of the hopper 36 which are located at the
The armature shaft 62 must be rotatedin a
sides of the supplemental frame 23.
Retaining plates 36, 36 are provided at their
lower edges with beveled extensions 31, 31 which
are adapted to engage the upper sides of strips
clockwise direction as viewed in Fig. 4, so that
the belt 64 will travel in the direction of the ar
rows 15 because the shafts 43 and 52 must rotate
in clockwise directions, as viewed in Fig. 4. This 5
34, 34. Bolts 38, 38 may be relied on to secure
the retaining plates 36 with their upper edges
in engagement with the lower edges of the abut
produceqa gyratory movement of the supple
- ment plates 33' and with their lower beveled ex
10 tensions 31 in engagement with the upper strips
34, thereby not only securing the screen 3| in
connection with the supplemental frame 23 but
also holding said screen under lateral tension.
The longitudinal central bar 32 cooperates with
15 the lateral edge supports to maintain the screen
3| in a horizontal plane during operation.
_
In order to effect such vibration of the screen
3| as ‘to transfer foreign material or unscreened
material rearwardly along the screen 3| to the
20 transverse chute 26, I have provided gyratory
vibrating mechanism for the supplemental frame
23.
By referring to Figs. 4 and 5, it will be noted
that upper bearing blocks 39, 39 and lower bear
25 ing blocks 46, 46are rigidly secured to the main
frame 8 at the sides thereof. J ournaled by means
of the ball bearings 4| , 4| in the ?xed bearing
blocks 39, 39 are the reduced end portions 42,
42 of the transverse shaft 43. At the inner .ends
30 of the reduced extensions 42 are eccentrics“, 44
which are journaled by means of the ball bearings
4.5, 45 in the ends of the tubular transverse hous
ing 46, the ends of which are rigidly secured to
the side walls of the hopper l9 and to the side
35 walls of the supplemental frame 23.
At the inner ends of the reduced extensions 42
adjacent to the eccentrics 44 are keyed the ?y
‘wheels 41, 41 to rotate with the shaft 43. Weights
48 may be detachably connected by means of bolts
40 56 to either or both of the?y wheels 41 and these
weights may be so arranged as to counterbalance
the throw or momentum of the supplemental
frame and the screen thereon, relatively to the‘
is for the reason that the eccentrics 44 must
mental frame in a clockwise direction, as viewed
in Fig. 4, thereby transferring unscreened mate
rial vor foreign matter rearwardly along the screen 10
3| to the chute 26. That is to say, by rotating
the shaft 43 in the direction of the arrow 16,
as shown in Fig. 4,"the eccentrics 44 will vibrate
the screen 3| by moving the same upwardly and
rearwardly thereby throwing the foreign mat- l5
ter toward the chute 26 in step by step move
ments.
The shaft 52 must rotate in a clockwise direc
tion as indicated by the arrow 11 on Fig. 4 so
as to engage the material and transfer it by im- 20
pact along the upwardly and rearwardly inclined
discharge passageway which has a closed top and
an open bottom, having an inverted U-sha'pe as
shown in Figs. 3 and 5.
The mixture of used sand and foreign matter 25
which is shoveled into the‘ hopper I9, is prevented
by the rear wall 16 thereof from going beyond a
position back of a plane' extending through the
rear portion of the tubular housing 46. To pre
vent screened material from accumulating on top 30
of the tubular housing 46 a de?ecting plate 5|
(Fig. 4) is provided to de?ect the material there
from.
Thus the screened material passing‘.
through screen 3| will be guided by the hopper '
36 including the laterally inclined walls 36' best 35
seen in Fig. 4. The screened material will thus
be compelled to slide from the walls .of the hop
per 36 into the discharge opening in the bottom
thereof and consequently the distance which the
screened material falls by gravity will be short- 40
ened and its descending velocity decreased. The
discharge passageway 22 is in the form- of an
inverted U-shaped frame or chute detachably
main frame, and thereby lessen the vibration of
bolted at 19-and 86 to the main frame 8. The
rotor comprising the spiders 54, 54 and the ?ights 45
Spaced below the transverse shaft 43, as shown 59, 66, is mounted at the rear end portion of the
in Figs. 4_and 5, is a transverse shaft 52, the ends ' passageway 22 intermediate the ends of the frame
of which are journaled by means of the ball bear- ' 8 and adjacent to the opening 8| through which
ings 53, 53 in the bearing blocks 46, 46.
.
material is received from the hopper 36. ‘An aux
Keyed to the shaft 52 intermediate the ends iliary hopper 82 may be mounted on the inverted 50
50
thereof are two spiders 54, 54 each having a _ chute 22, as shown in Fig. 4, not only-to direct ,
pair of radial arms 55, 56 to the outer ends of the screened material into the upper side of the
which are detachably connected by means of the cylindrical path of the ?ights 59 and 66, and
bolts 51, 58 the ?ights 59 and 66, as shown in afford immediate free mixture of air therewith,
but also to intercept the gravity fall of some of 55
55 Figs. 4 and 5.
Mounted at the upper rear portion of the main I the material, thereby decreasing its velocity and
frame 8 ‘is an electric motor 6|, as shown in assuring its being acted upon by the impact of thev
Figs. 1 to 4, inclusive. Mounted at the outer end ?ights 59 and 66 when in the dotted line posi
of the armature shaft 62 is a pulley 63 adapted tion shown in Fig. 4. The rotation of the shaft
the ‘main frame 8.
v
,
60 to drive a belt 64 which is in engagement with
the V-shaped grooves 65' and 66’ of the pulleys
65 and 66 which are respectively secured to the
shafts 43 and 52, as shown in Fig. 5. The pulleys
63, 65 and 66 may be protected by the covering
05 casing 61 which encloses the three pulleys 63,
52 in a clockwise direction as viewed in Fig. 4 60
should be at such speed as to assure the impact
ing of substantially all of the material by the“ '
?ights 59 and 66; However, it is preferred to
have the discharge passageway provided with an.
open bottom so that such material as is not dis- 65
The ?y wheels 41, ’ charged from the rear end of the machine, may
41 may be provided with the canopies 69, 69.
fall on to the ?oor under the frame 8.
Lubricating connections for the ball bearings
Inasmuch as Fig. 5 is a section taken on the
65 and 66 and the V belt 64.
45, 45 may be provided as indicated at 16, 16.
70 Likewise, lubricating connections may be pro
vided for the ball bearings 4|, 4| as indicated at
1|, 1|. Provision may be made‘for lubricating
,the ball bearings 53, 53 as indicated at 12, 12.
The shafts 43 and 52 may be held against end
75 wis'e movement as indicated at 13, 13 and 14, 14.
line 5--5 of Fig. 1, looking rearwardly, the trail
ing face of each of the ?ights 59, 66, as viewed in 70
Fig. 5, and in Fig. 3, is shown to be V-shaped.
The leading face 63 is also V-shaped. When
the rotor operates in a clockwise direction as
viewed in Fig. 4, the leading face 83 moves in the
direction of the arrow 11. Since the leading 75
3
2,132,165
face 83 of each of the ?ights 59 and 60 is re
ceding or V-shaped when viewed in plan while
in a top or bottom position, the screened mate
rial will receive such impacts as not only to
aerate the same but also to mix the same thor
oughly during its discharge from the rear end
of the machine. That is to say, since the im
pact faces of the ?ights are in intersecting planes,
the material will be thrown diagonally across the
10
inverted U-shaped chute from opposite vsides,
thereby thoroughly mixing or blending the
screened sand into a homogeneous mixture by
the time it reaches the pile of screened and aer
ated sand spaced back of the machine.
Adjacent‘the discharge end of the inverted
15
chute 22 I preferably provide an adjustable in
verted U-shaped de?ector 90 pivotally mounted
at 9| on the main frame 8 by spaced angle mem
bers 92 each of which is provided with a plu
20 rality of spaced holes 93 adapted to receive se
lectively the latch end of an adjusting rod 94,
the other end of which is pivoted at 95 to the
de?ector 90. As best seen in Fig. '7, each of the
rods 94 has a right angle end portion 96 which
is adapted to be inserted in the selected hole
93, and said rods each carry a sliding block 9‘!
having an extending lip 98 adapted to engage an
angle member 92 and to retain the rod 94 locked
in the hole 93. It is evident that by sliding the
30 block 91 upwardly along the rod 94, the end por
tion 96 may be freed and removed from the
hole 93.
In addition to the structure already described,
it is to be noted that the hopper I9 is provided
35 with a removable preliminary grating screen I00
comprising spaced bars placed on edge and con
nected at their rear ends to an upwardly ex
tending back board |0|, which grating screen
together with the back board |0| as a unit, is
40 removably attached to the hopper I9 by wing nuts
and bolts I02. It is evident that this grating
screen I00 will perform a rough screening of
the foundry sand and will be effective to remove
any contained large pieces of foreign matter, such
45 as iron, and any unduly large lumps of caked
sand. These large particles will slide by gravity
along the grating bars I00 by reason of the in
clination shown in Fig. 4 and will drop over the
front of the device where they may be readily
50 removed, or if of caked sand, they may be broken
up, as with the shovel of the operator. The un
screened material moves forwardly from the
grating screen I00, but the unscreened material
on the screen 3| moves rearwardly.
55
In addition, I employ a ?ail I03, best seen in
Figs. 4 and 6 which is formed of ?exible material
such as fabric or-rubber and is attached at one
end to the bottom of the rear wall ‘I8 of the
on the housing 46 at the abutments 85, 85 made
integral with the housing 46, which in addition
act as spacing and centering abutments for the
lower portion of the walls 30’, 30'.
~
Inasmuch asthe foundry sand conditioning ap
paratus shown in the accompanying drawings is
relatively small, it may be very readily pulled
manually to any desired location in a foundry,
and electric connection made at 86 to the motor
6| from any suitable electric power outlet in the
foundry, and the motor may be started and
stopped by means of the push-button switch 81,
shown in Fig. 1. The screen 3| may be readily
removed for cleaning or repair or for replacement
by a screen of a different mesh. The flights 59 15
and 60 may be varied in number and each may
be removed for repair or replacement. Although
the portable conditioning apparatus is particu-'
larly adapted to the cleaning and blending of
foundry sand, it may have a general application 20
and I therefore prefer to mount the inverted
chute ‘22 for detachment from the frame 8 so
that if desired it may be cleaned.
In some in
stances, such as when light material in powdered
or desiccated form is to be aerate-d, the screen
3| may be entirely omitted or replaced by a rela
tively large mesh screen. It should also be noted
that if the screen 3| is omitted and the granu
lated material will ?ow with su?‘icient freedom
from the bottom of the hopper 30’, 30', the‘belt 30
64 may be replaced by one shorter in length and
connected between the pulleys 63 and 66 only, so
as to cut out the pulley 65. That is to say, when
it is ‘not necessary or desirable to vibrate the
supplemental frame relatively to the main frame,
the pulley 65 may be disconnected from the motor
so that only the pulley 66 will be driven in a
clockwise direction, as viewed in Fig. 4. How
ever, as above explained, when the machine is
to be used in foundries for reconditioning used
foundry sand, I prefer to combine the separating
mechanism with the rotor and rely on the latter
for its ‘fan action and cutting and impact action
to separate the particles of screened sand, and
thoroughly aerate and mix or blend the same
for re-use in future foundry work.
'
In the operation of the device, used foundry
sand will be fed, as by a hand shovel, to the hop
per I9 where it will ?rst be preliminarily screened
by the grating I00, which will discharge large
foreign matter or caked sand over the front end
of the device. The sand passing through grating
I00 will be subjected to a vibratory screening ac
' tion on screen 3| and those particles which do
not readily pass through screen 3| will be con
veyed by the motion thereof rearwardly. After
passing under baffle plate 88, the ?ail I03 will
reduce the reducible portions of the .foundry
hopper I9. Said ?ail I03 is slit longitudinally at sand and cause them to pass through screen 3|.
60 I04 to form individual sections I05 which may The irreducible portions of the sand and foreign 60
be weighted by blocks I06 of metal or other heavy . matter, such as nails and iron, will pass to trough
material bolted thereto. The ?ail | 03 will be
effective to reduce any large lumps of sand
which pass to the section of screen 3| rearwardly
65 of the wall ‘I8, thus aiding them in passing
through said screen 3|, unless irreducible. The
size of the particles which may pass under plate
20 and discharge at the side of the device.
Inasmuch as the gyratory vibration of the sup
plemental frame 23 imparts a rearward convey
ing action to the unscreened material on the
screen 3|, it is preferred that the lower sides of
the ?ail sections shall have frictional surfaces for
‘I8 may be regulated by regulating the size of I engagement with the unscreened reducible lumps
the opening at the lower edge thereof by adjust
70 ment of the elevation of the baffle plate 88 which
may be secured in adjusted position by bolts 89
seen in Figs. 4 and 5.
of granular material to assist in disintegrating
such lumps for passage through the screen. The 70
more important feature of the ?ail sections, how
ever, is that each individual section has a true
Reverting to the hopper structure shown in ?ailing ‘action independent of the others. That
Figs. 4 and 5, it will be seen that the walls 30', is to say, the ?ail sections will ?y up intermit
75 30' may be supported at their lower portions tently to various distances dependent upon the
75
4
2,182,165
nature of the sizes of the reducible lumps under
the same, and each section will return by gravity
with a ?ailing action with which co-operates the
vertical component of vibration of the screen 3|.
In other words, while the screen at each point
thereof is vibrated circularly and produces a con
thereunder on said screen, a ?ail attached at one
end to said one side wall and extending there
veying action in its own plane and a screening
action transversely of such plane, the ?ail sec
tions ?ap up and down individually to effect the
separator.
from away from said hopper and adapted to re
duce reducible material which passes under said
one side wall and to pass it through said screen,
and means for effecting operation of said screen
'
2. In a foundry sand conditioning apparatus,
the combination with a frame, of a screen sep
of crushing blows intermittently on the ' arator carried by said frame, a feed hopper car
reducible lumps of granular material before ried at the front end of said frame above said
reaching the transverse discharge chute 20. screen, said hopper having one side wall extending
When the caked material is easily granulated, the across the screen intermediate its ends having
weights I06 may be omitted, but in some instances the bottom thereof positioned above the screen to
when additional crushing force is necessary the provide an opening to allow material to pass 15
weights I06 are made larger to secure greater thereunder, a preliminary screening means car
crushing forces on the individual ?ail sections. ried by said hopper adapted to make a rough sep
Nevertheless, the freedom with which each flail aration of foundry sand and foreign matter, an
adjustable ba?le carried by said one side wall
section moves upwardly on its hinge will not in
20 terfere with the transfer of the irreducible mate “ adapted to be adjusted to vary the size of said 20
opening, a ?ail positioned above said screen and
rial to the transverse discharge chute 20.
The sand which passes through the screen 3| at the rear end thereof adapted to disintegrate
will be directed by hopper 3| to auxiliary hopper reducible lumps of material which pass through
said opening and to force the material through
82. Plate 5| will also aid in this action and pre
v striking
25 vent an accumulation of sand on housing 46.
The sand received by auxiliary hopper 82 will
pass through opening 8! where it will be struck
by impellers 59 and 60 which will throw the sand
particles rearwardly along chute 22 in crossing
pathways, thus mixing, tempering, cutting, blend
ing, aerating and cooling the sand without de
stroying the bond in the foundry sand by any
scraping or raking action. The sand will flow in
a stream rearwardly of the machine and form in
a pile or windrow. The adjustable de?ector 90
may be adjusted to determine the position to
which the sand is’ to be thrown. This particular
adjustment is dependent upon the height of the
pile being fed, or the distance rearward that it
'
40 is desired to throw the sand.
The cutting or mixing action insures a homog
enous mixture of silica and bond with a complete
reduction of any large particles. The tempering,
that is, the mixing of the water or moisture with
the sand uniformly, is very e?iciently carried out
with desired uniformity, thus insuring good molds
which will not fall, yet which are not too moist
in spots. Furthermore, by eliminating the neces
» sity for any raking or scraping action to mix, cut,
50 temper or blend, the sand, the tendency to de
stroy bond, incident to raking or scraping, is
avoided.
This application is a continuation in part of
my prio'r application for a foundry sand condi
55 tioning apparatus, Serial No. 747,042, ?led Octo
her 5th, 1934.
Obviously those skilled in the art may make
various changes in the details and arrangement of
parts without departing from the spirit and scope
60 of the invention as de?ned by the claims hereto
said screen while permitting irreducible material 25
to pass over the end of said screen, said ?ail com
prising ?exible fabric material formed in weight
ed strips, and means for eifecting operation of
said screened separator.
,
'
3. In a foundry sand conditioning apparatus,
arator carried by said frame,_a feed hopper car
ried at the front end of said frame above said
screen, said hopper having one side wall extend
ing across the screen intermediate its ends having 35
the bottom thereof positioned above the screen to
provide an opening to allow material to pass
thereunder, an adjustable baffle carried by said
one side wall adapted to be adjusted to vary the
size of said opening, a ?ail positioned above said 40
screen and at the rear end thereof adapted to
disintegrate reducible lumps of material which
pass through said opening and to force the ma
terial through said screen while permitting irre
ducible material to pass over the end of said
screen, said ?ail comprising ?exible fabric mate
rial formed in weighted strips, and means for vi
brating said frame to operatesaid screen sep
arator.
.
'
-
'
~
4. In a foundry sand conditioning apparatus, 50
the combination with a frame, of a screen sep
arator carried by said frame, ba?le means extend
ing across the screen intermediate its ends having
the bottom thereof positioned above the screen to
provide an opening to allow material to pass
thereunder, a ?ail positioned above said screen
and at the discharge end thereof adapted to dis
integrate reducible lumps of material which pass
through said opening and to force the material
through said screen while permitting irreducible 60
appended, and. I therefore wish not to be re
material to pass over the end of said screen, said
stricted'to the-precise construction herein dis- - ?ail comprising ?exible fabric material formed
closed.
'
g
Having thus described and shown an embodi
ment
of my invention, what Idesire to secure by
65
Letters Patent of the United States is:
1. In a foundry sand conditioning apparatus,
so
the combination with a frame, of a screen sep
in strips carrying weights, and means for vibrat
ing said frame.
~
5. In screening apparatus, the combination
with a support, of a screen, a discharge chute at
~ the combination with 'a frame, of a screen sep
the rear end of the screen, mechanism for vibrat
ing said screen with a motion to effect a transfer
arator carried by said frame, a feed hopper car
70 ried by said- frame and positioned above said
of unscreened material rearwardly to said dis
charge chute, a ba?ie plate mounted over said
screen, said hopper extending only part way
screen and between the ends_thereof to act as a
across said screen with one side wall intermedi-
ate the ends of the screen and positioned there
above an amount to de?ne a restricting ori?ce to
gate to regulate the passage of unscreened mate
rial toward said discharge chute, ‘and a ?ail,
formed ‘of ?exible rubber and. weighting means
75 permit a controlled amount of material to pass
and positioned between said ba?ie plate and chute
2,132,185
5
‘
to reduce any reducible material and force it
through said screen before it reaches said chute.
6. In a screening apparatus, the combination
various sizes of lumps of granular material on the
screen, mechanism for supporting said ?ail in
yielding contact with the screen, and means for
with a frame, of a supplemental frame, a screen
mounted on said supplemental frame, a baiiie ex
and relative longitudinal movements between the
tending transversely of said screen intermediate
?ail and the screen.
vibrating said screen to secure relative vertical
'
its ends having its lower edge slightly spaced
10. ‘In screening apparatus, the combination
above the screen thereby forming a restricting
gate through which material passes, a coarse
with a screen, of a ?ail comprising a ?exible sheet
10 screen at the feed end ‘of said ?rst named screen
and on the feed side of said ba?le, means con
structed and arranged to vibrate said supplemen
tal frame to cause material to pass through and
over both of said screens, the material passing
4.1 through said coarse screen being received by said
?rst namedv screen for further screening and the
larger particles moving along said ?rst named
screen under said baffle to the discharge end
thereof, and a ?ail extending from said baiiie to
ward said discharge end and resting on said screen
to disintegrate reducible material on said ?rst
named screen.
_
'7. In screening apparatus, the combination with
a'frame, of a screen, means for vibrating said
screen withv respect to said frame, and a ?ail posi
tioned above and resting on said screen to dis
integrate reducible lumps of material thereon,
said ?ail comprising ?exible strips of non-metallic
material carrying weights.
8. In screening apparatus, the combination with
of friction material slotted to form sections adapt
ed to rest on a portion of said screen and each 10
section individuallyweighted, means for support
ing the ?ail from the unslotted end’ thereof while
said sections rest by gravity on the aforesaid por
tion of said screen, and means for imparting a
gyratory vibration to said screen-to secure trans 15
fer of unscreened material along the screen under
the ?ail and a relatively ?ailing action between,
the weighted ?ail sections and the screen trans
versely of the latter to effect disintegration of the‘
reducible material for passage through said
screen, and a chute in position to receive from
the screen after passing under said ?ail sections
the irreducible material transferred over the
screen and off the same.
_
'
.
11. In a foundry sand conditioning apparatus,
the combination with a frame, of a screen sep
arator carried by said frame, a primary feed hop
per carried at the feed end of said frame above
said screen, said hopper having one side wall ex
tending across the screen intermediate its ends ‘
a screen, of a sectional fabric ?ail with a weight
having the bottom edge thereof positioned slight
on each section tending to hold by gravity the
ly above the screen to provide an opening to al
low material to pass thereunder, a ?ail positioned
above said screen at the discharge end thereof
sections on the top surface of the screen, means
for supporting one end of each section while the
other end thereof is free for up and down move
ment, and means for operating said screen to
effect such up and down movement of the free
outside said hopper adapted to disintegrate reduc
ible lumps of material which pass through said
opening to force the material through said screen
end of said flail sections to crush the reducible “ while permitting irreducible material to pass over
material between the ?ail sections and the screen.
4.0
9, In screening apparatus, the combination with
a screen, of a ?ail of ?exible rubber material
slotted to form sections to facilitate contact with
the discharge end of said screen, said ?ail com
prising ?exible weighted fabric material, and 40
means for operating said screen separator.
FRED B. HENRY.
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