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July 22, 1947~
‘A. G. GRANATH ET AL
2,424,272
APPARATUS FOR REMOVING FINES IN BUCKET LOADERS
’
I Filed Aug. 25, 1944
Eg_ I
s Sheets-Sheet 1
54'
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[email protected]
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4/
ZNMENZUZIfS
?zel G Granal’h
Julius J Gruenj‘eld
July 22, 1947-
A. e. GRANATH ET AL
2,424,272
APPARATUS FOR REMOVING FINES IN BUCKET LOADERS
Filed Aug. 25, 1944
s, Sheets-Sheet 2
.23
Arr/EN U
5
?rel G Graml'iz
r
Julzzw J. Gruerzfelai
E W 514-75
July 22, 1947.
A. G..GRANATH El‘ AL
2,424,272
APPARATUS FOR REMOVING FINES IN BUCKET LOADERS
Filed Aug. 25, 1944
3 Sheets-Sheet 3
~33
N E; U
JZxeZ G. Grana
.
> 37 V
Julz'zgs J Gruerzfela,’
ZL-vs
" '
Patented July 22, 1947
2,424,272
UNETED STATES PATENT OFFICE
2,424,272
APPARATUS FOR, REMOVING FINES IN
BUCKET LOADERS
Axel G. Granath and Julius J. Gruenfeld, Chi
cago, Ill., assignors to Herbert S. Simpson,
Evanston, Ill.
Application August 25, 1944, Serial No. 551,170
1
16 Claims.
(01. 209-22)
2
In the mixing and mulling treatments of
granular materials, such as foundry sands and
the like, used foundry sand becomes mixed with
minute parts of burned clay and broken sand
grains, which are termed ?nes and when allowed
to accumulate results in the formation of de
including an air controlled loading bucket adapt
able for removing ?nes from the material as it
enters the bucket for subsequent feeding into
the machine substantially free from ?nes, per
mitting the ?ne free material to be treated and
bonded in the machine and then reused. for the
making of molds or the like without loss of per
fective sand molds in which the sand is not
properly vented or in which there is a loss of
meability therein.
permeability. It is consequently desirable in the
It is also an object of this invention to provide
treatment of foundry sand and the like to re
an apparatus for feeding materials to a treating
move the ?nes to obviate loss of permeability.
machine by subjecting the material entering the
It has been customary in the past to remove
apparatus to a dry type exhaust treatment, for
?nes from foundry sand and the like, by a method
effecting removing ?nes from the material there
requiring a separate screening unit over which
the sand is ?rst passed and is subjected to air 15 by obviating loss of permeability in articles
formed from the reclaimed material.
currents to exhaust the ?nes from the sand be
It is a further object of the invention to pro
fore the sand is treated or prepared for molding
vide a material bucket loader mechanism which
purposes. Another method used is one in which
incorporates in its design ?nes removal produced
the sand is ?rst delivered into a treating ma
by
suctioning air through the material while en
chine, such as a mixer and muller, from which 20 tering
the loader.
the ?nes are exhausted direct, by using a very
It
is
furthermore an object of the invention to
high volume of air which is passed over the top
provide an improved apparatus for screening and
of the material while it is being treated. The
cleaning foundry sand and similar materials of
?rst of these methods requires considerably more
coarse foreign matter and ?nes while entering a
equipment and, therefore, a greater outlay is
25
necessary to provide every mixer with a sep
loader, which apparatus is economical, clean and
e?‘ective.
arate screening unit. In the second method, re
A feature of the invention is the provision of
ferred to, a greater volume of air is required
a loading mechanism including a bucket pro
when ?nes are exhausted direct from the mixer.
Neither of the two ?ne removal methods re 30 vided with a hoist switch controlled electric
vibrator for operating a screen permitting the re
ferred to are adaptable for use in the average
moval of coarse matter and the entrance of the
small foundry for which a demand has been
?nes material into the bucket and the simul
created for a ?nes control unit of inexpensive and
taneous treatment thereof to air exhaust currents
efficient construction.
for the e?ective removal of ?nes from the ma
This invention relates to an improved and
terial prior to the treatment of the material for
simpli?ed, inexpensive and e?ective bucket loader
mechanism for use in loading foundry sand
mixers and mullers or other granular material
treating machines, said loading mechanism being
of the bucket type and including a screening and
air suction loading bucket. A current of air is
suctioned directly through the entering material
stream and out of the bucket thereby removing
the ?nes from the material as it enters the
foundry mold making purposes or the like.
Another feature of the invention is the pro
vision of a spent foundry sand feeder or loader
having a vibrator controlled screen governed by a
limit switch for starting the operation of the
screen when the loader bucket is in a receiving
position, to cause a more ?nely diffused stream
of sand to enter the bucket to be subjected to air
bucket, allowing the ?ne free material to ?ll the 45 exhaust currents, whereby the major portion of
the ?nes are removed from the sand before it
bucket ready for discharge into a material treat
is delivered to a sand mixer, muller and bonding
ingrmachine, such as a foundry sand mixer and
machine.
muller used in combination with the improved air
Another object of the invention is the provision
exhaust loader of this invention.
An object of the invention, is the provision of 50 of a bucket loading unit including a bucket loader
provided with a screen operable by a vibrator
a very simple and compact combined bucket load
having a control switch which also stops the
ing, screening, and ?ne exhausting unit, for use
downward travel of the bucket loader so that as
with material treating machines.
the loader comes to rest the vibrator starts vibra
It is an object of this invention to provide a
tion of the screen.
material treating machine with a material loader 55
Other and further important objects of the
2,424,272
from the disclosures
invention will be apparent
in the speci?cation and the accompanying draw
ings.
The invention (in a preferred form) is illus
trated in the drawings and hereinafter more fully
described.
4
through which screened sand, from which the
?nes have been removed, is adapted to be fed-into
the mixer crib 5 for treatment.
Mounted adjacent the mixer is an improved
material loading machine unit by means of
which batch feeding of a material, such as spent
foundry sand is adapted to be accomplished.
On the drawings:
The loader unit comprises a vertical framework
consisting of two channel uprights 9 the lower
ing system including an improved bucket load
ends of which are secured to the floor by suit
10
ing screening and ?ne exhaust unit embodying
able angle iron feet l?. The framework uprights
Figure 1 is a side elevation of a material treat
the principles of this invention and adaptable
for expeditiously and economically carrying out
the method of ?ne removal during the loading
and feeding of material to a treating station;
9 are connected by transverse frame members
to form a rigid structure.
Rigidly secured on the back of the upright
framework is a rear or auxiliary framework H
Figure 2 is a front elevational view of the sys 15 which is disposed between the loader framework
tem and the loading unit forming a part thereof;
and the mixer, as clearly shown in Figure 1.
Figure 3 is an enlarged fragmentary vertical
Mounted on one side of the auxiliary framework
detail section taken on line Ill-III of Figure 2
H is a control board or panel l2 on which the
to illustrate the relationship of the loading
mixer control box 3 and the mixer push button
bucket with respect to the screen and vibrator 20 switch box 4 are mounted. Also mounted on the
and the contact between the bucket and the air
panel I! above the control boxes 3 and 4 is a
exhaust box;
standard type hoist control motor reversing unit
Figure 4 is a fragmentary horizontal detail
I3 having connected therewith a three push but
view, taken on line IV-—IV of Figure 3;
ton switch control box l4 for governing the rais
25
Figure 5 is a fragmentary vertical sectional
ing, stopping and lowering of the loading bucket.
view taken on line V—-V of Figure 4;
Mounted on the control panel l2 above the
Figure 6 is a fragmentary vertical detail sec
control units l3 and I4 is an air exhaust control
tion taken on line VI-VI of Figure 5 showing the
unit or operating box IE to which an air control
loading bucket in its lowered position and oper
start and stop two push button switch box I6 is
30
ating the lower limit switch; and
connected. The air exhaust push button switch
Figure 7 is a schematic wiring diagram for the
box IE is also mounted on the panel [2 as shown
control and operation of the loading bucket and
in Figure 1.
the vibrator for operating the bucket screen.
One of the main features of this invention is to
provide a material feeding or loading unit, for
As shown on the drawings:
35
The present invention relates to an apparatus
mixers and the like, by which batch bucket load
for removing coarse foreign elements and ?nes
ing, screening and ?nes exhausting may be effi
from spent granular materials, such as used
ciently and economically accomplished.
foundry sand and the like, said method and
The loading unit consists of a bath type feeder
apparatus being adaptable for use in small foun
mechanism
including a container or bucket com
dries at nominal cost for the feeding or loading 40 prising a main body portion I‘! having a ma
of the materials and for the removal of coarse
terial receiving opening l8 in an inclined top wall
foreign matter and ?nes in the loading container
thereof. Formed upon the top and across the
used for delivering the material to a treating or
rear of the bucket main body portion l‘! is a ma
conditioning machine such as a foundry sand
terial discharge or feeding spout or chute l9
having an air exhaust opening or port 20 in the
mixer and muller.
The improved loader is designed and con
upper portion of the back wall thereof. The
structed to produce an increased efficiency by
upper end of the bucket discharge chute I9 is
improving the method of delivering spent foun
open and is provided with a ?op gate 2| hingedly
dry sand and similar materials to a treating ma
connected to the top edge of the front wall of the
50
chine by causing simultaneous screening and
bucket chute 19 as illustrated in Figure 3.
suction ?nes removal in the delivery bucket while
The bucket receiving opening [8 is covered by
means of a screening unit comprising a screen
being loaded.
As illustrated in Figures 1 and 2, the improved
frame or mounting 22 which is disposed in an
screening and ?nes removal loading unit, is shown
inclined
plane on the open top of the bucket I‘!
in coacting relationship with a foundry sand 55 to which the screen mounting is secured, as
mixing, mulling and bonding machine herein
shown in Figure 3. The screen mounting carries
after referred to as a mixer. The material receiv
ing and treating mixer may be of any selected type
such for example as the mixer shown and claimed
a resiliently mounted screen 23 which is of the
vibratory type. The spent or inert foundry sand
or other material, which is to be reclaimed or
60
in the-pending application for patent of Alfred C.
treated in the mixer, is loaded or delivered into
Christensen, ?led May 10, 1944, United States
the bucket H, by shovelfuls or may be delivered
Serial No. 534,912. The mixer shown, briefly com
in batches by means of wheel barrels or from
prises a base or pedestal l supporting a driving
dump cars or the like permitting the material to
motor 2 for driving a gear mechanism within
drop into contact with the screen 23. The ?ner
the base. The operation of the motor 2 and the 65 material is permitted to sift into the bucket while
mixer is governed by means of an electric control
the larger or coarser portions of the material,
box 3 having a start and stop push button switch
such as scrap nails, gaggers and the like are held
box 4 connected therewith for starting and stop
back by the vibrating screen and are permitted
to slide downwardly thereover to be discharged
ping the operation of the mixer.
Supported on the base I, is a crib 5 within 70 and conveyed away by any suitable means,
which the motor driven mixing, plowing and
It will thus be noted that the screened sand
mulling mechanisms are mounted. Removably
and the ?nes mixed therewith pass into the
engaged on the crib 5 is a cover or hood 6 pro
bucket in a ?nely diffused stream by means of
vided with a material receiving or loading chute
the action of the vibrating screen 23. The screen
75
'1 having a receiving opening or loading port 8
2,424,272
23 is connected for operation by a selected stand
ard type of electric vibrator 24, by two feed wires
25 and 26 disposed within a conduit 27 leading
from the vibrator 213' into the top of a vibrator
start and stop switch control unit disposed with
in a switch housing or case 28.
The switch case
28 is provided with apertured ?anges permitting
6
and the drums mounted thereon.
The motor
55. has a solenoid brake 58 connected across the
terminals T?! and T..—2 thereof.
The motor 55 is connected with the reversing
unit I 3 and with the switch button motor control
box 14 containing a main bucket hoisting con
trol switch 59, a bucket stop switch 60 and a
the same to be bolted to one side of the bucket i ‘i.
main bucket lowering control switch 6|. The
The two wires 25 and 26 pass into the vibrator
motor stop switch 60 is connected by a wire 62
control switch case 28. The wire 25 is connected 10
to
the line wire 1H3 and by a wire 63 to one ter
to a switch contact spring 29 while the wire 28
minal of the raise switch 59 as shown in the wir
is connected to a switch contact spring 38. The
ing diagram of Figure 7. A wire 64 connects the
contact springs 29 and 39 are mounted in the
hoisting
switch 58 to a terminal of the main
case 28 (Figures 5 and 6) and are respectively
adapted to be carried by the movement of the 15 ‘bucket lowering switch 6!. A wire 65 connects
the second terminal of the bucket lowering switch
bucket into and out of contact with two station
61
to the terminal 44 in the bucket lowering con
ary vibrator control contacts 31 and 32 as the
trol switch box 4!. A wire '66 connects the ter
bucket moves into its lowermost or loading posi
minal v43 in the switch box 4| to one terminal of
tion and as it rises to leave said position for de—
a
magnetic coil 61, the other terminal of which
livering a charge of the material to the mixer.
20 has a wire ‘68 connected thereto. The wire 68
The vibrator control contacts 3! and 32 are
is also connected to the line wire L-l. Con
supported on an arm 33 forming an extension
nected
to the second terminal of the main hoist
of an adjustable bracket plate 3% having adjust
control switch 59 is one end of a wire 69 the
ing slots 35 formed therein for the reception of
other end being connected to one terminal of
clamping bolts 35 for holding the bracket plate
an auxiliary bucket hoist or raise switch 10. The
34 bolted in place. The vibrator control con
tacts 3| and 32 may be raised or lowered by ad
second terminal of the auxiliary hoist control
provided in the control switch box 13! is a vi
brator control terminal 42.
is operable by means of a spring controlled arm
or lever 13 mounted on the'exterior of the upper
‘switch box 72 in the path of travel of one of the
areProvided
two motor
in the
control
lowering
terminals
control:93switch
and box
M. A
lower bucket rollers 47 to be operated thereby
combination vibrator and bucket lowering aux~
iliary control switch 45 is mounted in the box 4!
and is operable by means of a spring controlled
t9 cause opening of the auxiliary hoist control
switch ‘is to break the bucket hoisting circuit to
switch ‘lii is connected by a wire ‘H to one termi
justing the supporting plate 3t by means of the
nal of a magnetic coil 12 having a wire 13 con
slots 35 when the bolts 33 are loosened. Re
necting the same to the line wire L——l.
spectively connected with the vibrator control 30
The auxiliary hoist control switch 10 is mount
contacts 3i and 32 are wires 3'.’ and 38 which re
ed in a bucket hoisting control box 12 which is
spectively connect up with vibrator control ter
secured on the upper portion of the loading
minals 39 and 49 provided in a bucket lowering
framework upright 9 on which the box 4| is
control switch box 4| mounted on the lower por
mounted. The auxiliary hoist control switch ‘Ill
tion of one of the framework uprights Q. Also
operating arm or lever 46 disposed on the ex
terior of the box ill in the path of travel of one
of the lower bucket guide rollers d? which are
at the upper limit of movement of the bucket
stop the bucket hoisting motor 55, permitting
discharge of the pre-cleaned batch of material
into the mixer.
As shown in the wiring diagram of Figure '7
the vibrator control terminal 42, in the switch
box 4| is connected to the line wire L—3 by a
wire 14. The vibrator control terminal 39, in
the box 4|, is connected to the line wire L—2 by
rotatably mounted on opposite sides of the lower
rear portion of the bucket ll. The bucket 17 is
also provided with upper guide rollers 48.
The bucket guide rollers Ill and 13'8 are posi
tioned on opposite sides of the bucket H and
a wire 15a.
travel in guide tracks 49 and auxiliary tracks 50
The loading bucket I1 is equipped with, the
50 which are formed on the loading frame up
vibratory
screen 2'3, so that when the bucket is
rights 9 by angle irons 5i and side plates 52 se~
in
its
lower
position spent and inert material,
cured to the channel uprights.
such as previously used foundry sand, is shoveled
The auxiliary guide tracks 50 are located near
or otherwise deposited on the screen 23 which
the upper portion of the loading frame and are
is vibrated by the vibrator 24 when the vibrator
adapted to serve as guides for the lower bucket
control switches 29 and 30 are closed and the
rollers 41 when the upper rollers 48 reached the
auxiliary control switch 45 is in contact with the
upper closed and curved ends of the main guide
terminals 40 and 42. Vibration of the screen
tracks 49 to cause the hoisted loading bucket, 60 causes removal of the coarse metallic material
at the upper limit of its travel, to be upset or
tilted to discharge a batch of material into the
chute l of the mixer, as illustrated in dotted
lines in Figure 1 in which the ?op gate 2| is
moved into open position by the discharging
stream of the material.
The loading bucket I1 is operated by cables
53 adapted to be wound and unwound on drums
or reels 54 mounted on the auxiliary framework
I I and operated by a three phase motor 55 hav
ing terminals T-l, T-2 and T-3 to which cir
cuit lines L—l, L—2 and L—3 are respectively
connected, as shown in Figure 7. The motor
55 acts through a speed reducer drive 51 to drive
and foreign matter which slides down or is
shimmied oif of the screen, while the sand grains
and ?ner material and dust sift and ?ow through
the screen and into the bucket.
For the purposes of exhausting or withdraw
ing the ?nes from the materials which enters
the bucket an'air exhaust mechanism is pro
vided for coaction with the bucket when in its
lower loading position. The back wall of the
70 bucket is provided with the exhaust opening or
outlet port 20 (Figure 3) which, in the lowered
position of the bucket registers with the mouth
75 of an air exhaust or suction box 16. Secured
around the mouth 15 of the air exhaust box 16
the belt 56 which operates the cable drum shaft 75 is a resilient packing or sealing frame 17 con
2,424,272
structed of a strip of rubber or the like folded
upon itself to form a ?exible bead against which
the back of the bucket, when lowered, is adapted
to be brought into air sealing contact as
shown in Figure 3. Connected to one end of the
air exhaust box 16 is one end of an air exhaust
pipe or flue 18, the other end of which is con
nected to a dry-type air exhauster ‘l9 operable
switch control button 6| to close the main bucket
lowering control switch thereby establishing the
bucket lowering circuit to the motor 55, causing
reversal thereof to unwind the cables 53 permit
ting release of the upper control lever '23 and
closing of the auxiliary hoist control switch 10
ready for the next bucket hoisting operation.
The stop switch 60 is common to both the
bucket raising and lowering control circuits, so
by a motor 80 connected to the air exhaust con
that in case it is desired to stop the travel of
trol box I5 and the push button control box IS. 10 the bucket in a selected position, it is only neces
The operation of the air exhaust is controlled by
sary for the operator to press the button of the
the start and stop buttons in the box l6.
With the bucket H, in its lowered position
(Figure 1) and having the back thereof in seal- ‘
stop switch 65 to open the switch and thereby
stop the motor 5'5.
The bucket control main hoisting switch 5-9
ing contact with the air exhaust sealing frame 15 and main lowering control switch Bl are so
11 of the air exhaust box 16, the air exhaust
mounted that when one switch is closed the other
start button is pushed thereby causing air to be
one is opened.
sucked or drawn through the screen and the
The air exhauster is controlled by the opera~
upper port of the bucket and then through the
tion of the start and stop buttons provided in the
bucket spout or chute I9 to exhaust through the 20 switch an IE. During the operation of the
exhauster 19. As material is shoveled into the
bucket loading mechanism the air exhauster may
bucket the ?ner ‘particles and the ?nes pass
be started in any position of the bucket and
through the screen 23 into the bucket, but the
may be left operating during a series of bucket
material flow is intercepted by the air exhaust
loading and emptying operations. If desired
currents which pass through the material 25 the exhauster may be set in operation at the be
stream, thereby causing the dust and ?nes to be
ginning of a bucket loading operation and then
separated from the material grains which drop
stopped when the bucket is hoisted for deliver
into the bucket to load the same simultaneous
ing a charge to the mixer.
with the exhaust and discharge of the dust and
It is to be understood, that the machine here
30
?nes through-the exhauster 19. It will thus be
in described may be employed in small estab
noted that an improved method of loading spent
lishments as well as in large ones, for the pur
foundry sand and the like is adapted to be prac
pose of screening and removing ?nes from ma
ticed with the bucket loading equipment herein
terials in a loading bucket to permit a partially
described, whereby the material has the coarse
cleaned material to be delivered to a material
and foreign matter removed therefrom and dis 35 treating or reclaiming apparatus and thus obviat
charged, simultaneous with the screening and
ing the necessity of removing the ?nes after the
the suction removal of the ?nes allOWing the
material is delivered to the apparatus.
bucket to be loaded only with the pre-cleaned
rl‘he various steps in the combination loading,
material which is to be batch fed by the loading
screening, ?nes removal and treating of spent or
unit into the mixer to be treated, bonded and 11e 40 inert materials such as foundry sand and the
like, may be separately and independently timed,
claimed for reuse.
When the bucket H has been loaded, as de~
by an attendant by a manual operation of the
scribed, the operator presses the main hoisting
respective push button control boxes mounted on
switch control button thereby closing the main
the control panel of the machine assembly, there
45
switch 59 to establish the bucket hoisting or
by providing a simple, effective and economical
raising circuit through the motor 55 to cause
material reclaiming and treating system.
winding up of the cables 53 to raise the bucket
While a selected machine assembly or system
from the'full line position of Figure 1 into the
has been illustrated and described for practicing
dotted line discharge position. As the upper
the method of bucket cleaning and ?nes re
bucket rollers 43 reach the closed upper ends of - moval of materials prior to the reclaiming of the
the main guide tracks 49 the lower bucket rollers
materials in material receiving units, it is to be
G'i pass into the auxiliary tracks 56 thereby
understood that the machine assembly is one ex
gradually upsetting or inverting the loaded
empli?cation of the principles involved. The
bucket. When the lower rollers a‘! approach
right is accordingly reserved to make such
their upper limits one of the rollers It? engages 65 ‘changes in the construction and in the arrange
the spring controlled lever 13 to swing the same
ment and combination of the elements and parts
upwardly thereby opening the auxiliary hoist
.of the system as will widen the ?eld of utility
control switch ‘59 to break the circuit to the
and increase the adaptability of the system with
motor 55 and thereby stop the bucket permit
out' departing from the principles of this in
ting the loaded bucket to discharge a batch of 60. vention. It is, therefore, not the purpose to lim
the pro-cleaned material through the bucket
it the patent granted hereon otherwise than
discharge chute [9 into the mixer receiving chute
necessitated by the scope of the appended claims.
'l beneath the opened bucket ?op gate 2|.
We claim as our invention:
At the beginning of the bucket hoisting oper
1. In a material reclaiming system wherein a
ation, the upward movement of the bucket raises 65
material treating machine is adapted to receive
the vibrator control switch box 28 thereby open
and recondition spent materials, said system in
ing the vibrator control switch to stop the vi
cluding'a loading device comprising a loading
brator and simultaneously release the spring
bucket mounted for movement in the framework,
controlled lower limit switch lever Q6 permitting
the control switch 45 to break contact with the 70 means for operating the bucket for delivering
material to the machine, means on the bucket
terminals t8 and G2 and establish contact with
for screening the material as it enters the bucket,
the terminals 43 and 44.
and‘ means for withdrawing ?nes from the
After the bucket has been unloaded in its
screened material as it enters the bucket.
uppermost inverted position as shown in dotted
lines in Figure 1, the operator merely pushes the 75
2. In a material reclaiming system wherein a,
2,42,4, 2.72
10
material receiving and treating machine is adapt
ed to receive and recondition spent materials, a
screen, a, vibrator control switch mechanism car
ried by the bucket, and electric contacts sup
loading device comprising a framework mounted
adjacent the machine, a, loading bucket operable
in the framework, means for raising and lower
ported on the framework to be engaged and dis
engaged by the switch mechanism to govern the
ing the bucket for delivering material to the ma
chine, a screen mechanism mounted on the bucket
bucket moves into and out of loading position.
operation of the vibrator and the screen as the
8. A material loading mechanism comprising a
for screening the material as it enters the bucket,
framework, a loading bucket operable therein,
and suction means for drawing air through the
means for hoisting and lowering the bucket to
material entering the bucket to extract dust and
10
alternately
move the same from a loading to a
?nes from the material prior to delivery to the
discharging position, said bucket having a mate
machine.
rial receiving opening and an air exhaust open
3. A material loader comprising a framework,
ing therein, a suction box mounted on the frame
a ‘bucket operable therein, means i or lowering and
work, and having an air exhaust opening there
hoisting the bucket to move the same into receiv—
ing and discharging positions, a screen on the 15 in, a resilient sealing frame on the suction box
around the air exhaust opening thereof to form
bucket for removing coarse matter therefrom and
a
sealing contact around the exhaust opening of
permitting ?ner material to drop into the bucket,
the bucket when the bucket is in a loading posi
a vibrator for vibrating the screen with the buck
tion, and an air exhaust mechanism connected
et in a material receiving position, and a vibrator
control governed by the movement of the bucket 20 with the suction box to cause air currents to be
drawn through the suction box across the stream
into and out of receiving position.
of material entering the bucket to exhaust ?nes
4. A material loader comprising a framework,
from the. material while the bucket is being
a loading bucket operable therein, means for mov
loaded.
ing the bucket into receiving and discharging po
9. The combination with a material loading
sitions in the framework, a screen on the bucket 25
bucket, of means for moving the same into and
out of material receiving position, an air exhaust
mechanism positioned to coact with the bucket
when the same is in a material receiving position
vibrator as the bucket moves into and out of
material receiving position, and means coacting 30 to cause lair :current to be drawn through the
stream of entering material to exhaust ?nes
with the bucket when in receiving position for
therefrom, and a friction seal between the air
exhausting air current through the bucket and
exhaust mechanism and the bucket.
through the material entering’ the same to ex
for removing coarse matter from material an
tering the bucket, a vibrator for operating the
screen, a control for starting and stopping the
haust dust and ?nes from the material while the
‘bucket is being loaded.
10. The combination with a material loading
35 bucket, of an air exhaust mechanism for drawing
5. A bucket loader mechanism comprising a
framework, bucket guides on the framework, a
loading bucket in the framework, means for hoist
ing and lowering the bucket in a predetermined
course prescribed by the bucket guides, a screen 40
on the bucket for removing coarse matter from
material as it is delivered into the bucket, a vibra
tor for vibrating the screen, and control switch
air currents through the bucket across the
stream of entering material to exhaust ?nes
therefrom, lan air seal on the air exhaust mech
anism for ?exible sealing contact with the bucket
when in loading position, and control means con
nected with the ‘air exhaust mechanism to start
and stop the same.
11. A material loading mechanism comprising
members mounted on the bucket and on the 45 a framework having bucket guide tr'acks formed
thereon, a loading bucket positioned for move
framework adapted to be moved into and out of
ment in the guide tracks alternately from a load
coacting relationship to govern the starting and
ing to a discharging position, means for hoisting
stopping of the vibrator as the bucket moves into
and lowering the bucket, a push button control
and out of receiving position on the framework.
for governing the hoisting and lowering of the
6. A bucket loader mechanism comprising a
50 bucket, an auxiliary hoist control switch mech
framework, bucket guides on the framework, a
loading bucket in the framework, means for hoist
ing and lowering the bucket in a predetermined
anism operable by the bucket when moving into
discharge position, a combination vibrator and
bucket lowering auxiliary control switch mech
course prescribed by the bucket guides, a. screen
anism mounted on the framework and operable
on the bucket for removing coarse matter from
55 by the bucket when moving into its loading posi
material as it is delivered into the bucket, a vibra
tion, a screen mechanism on the bucket, a vi
tor for vibrating the screen, control switch mem
brator connected therewith for operating the
bers mounted on the bucket and on the frame
same, and a vibrator control switch mechanism
work adapted to be moved into and out of co
on the framework and on the bucket for coaction
acting relationship to govern the starting and
stopping of the vibrator as the bucket moves into 60 with the combination vibrator and the bucket
lowering auxiliary control switch for governing
and out of receiving position on the framework,
the raising and lowering of the bucket and the
and an air exhaust mechanism positioned for 00-
automatic control of the vibrator.
action with the bucket when in loading position
12. A material loading mechanism comprising
to draw air currents through the bucket and
through the stream of material entering the 65 a framework having bucket guides formed there
on, a bucket positioned to move in said guides
bucket to remove ?nes from the material While
being loaded.
into loading and discharging positions, means for
raising and lowering the bucket, a main control
7. A material loading mechanism comprising
connected with'said means for governing the
a framework, 8, loading bucket operable therein,
means for hoisting and lowering the bucket to 70 operation thereof, an auxiliaryhoisting control
connected with the main control and operable by
move the same from a loading to a discharging
the bucket, a screening mechanism on the bucket,
position, a screen on the bucket'for removing
and a combination auxiliary bucket lowering con
coarse and foreign matter from material delivered
to the bucket, a vibrator connected with the 75 trol and a screen operating control connected
with the main control and with the screen mech
2,424,272
-
12
11'
to draw 'air current through the screen and
anism and governed by the movement of the
through the stream of material entering the
bucket into and out of loading position.
bucket to remove ?nes from the material.
13. A material loading mechanism comprising
16. A material loading mechanism comprising
a framework, a loading bucket operable in the
\a framework, a loading bucket operable therein,
framework, means for operating the bucket, a
means for operating the bucket in the framework,
main control for said means, a material screen
a main control for said means, auxiliary controls
on said bucket, a vibrator for vibrating the same,
on the framework connected with the main con
switch control mechanisms on the framework
trol and operable by the movement of the bucket,
and on the bucket connected with the main
10 a material screening mechanism on the bucket,
control and operable by the movement of the
and a screening mechanism control switch con
bucket into and out of loading position for start
nected with one of the auxiliary controls and
ing \and stopping the operation of the vibrator.
operable by the movement of the bucket into and
14. A material loading mechanism comprising
out of loading position to govern the operation
a framework, a loading bucket operable in the
of the screening mechanism.
framework, means for operating the bucket, a 15
AXEL G. GRANATH.
main control for said means, a material screen
JULIUS J. GRUENFELD.
on said bucket, a vibrator for vibrating the same,
switch control mechanisms on the framework and
REFERENCES CITED
on the bucket connected with the main control
The
following
references are of record in the
and operable by the movement of the bucket into 20..
?le of this patent:
and out of loading position for starting and stop
UNITED STATES PATENTS
ping the operation of the vibrator, and means
cooperating with the bucket when in loading
Number
Name
Date
position for, withdrawing ?nes from the material
2,309,036
Beardsley ________ __ Jan. 19, 1943
after passing through the screen’ and on entering 25, 1,561,866
Larkin __________ __ Nov. 17, 1925
the bucket.
335,632
Rosensteel ________ __ Feb. 9, 1886
15. A material loading mechanism comprising
1,307,747
Moynihan _______ __ June 24, 1919
a framework, a loading bucket operable in the
framework, means for operating the bucket, a
main control for said means, a material screen 30,
on said bucket, a vibrator for vibrating the same,
649,982
1,284,032
898,112
switch control mechanisms on the framework
and on the bucket connected with the main con
Number
trol and operable by the movement of the bucket
298,396
into and ‘out of loading position for starting and 35.
48,424
stopping the operation of thevvibrator, and a
24,082
switch controlled suction mechanism positioned
to coact with the bucket when in loading position
Warren __________ __ May 15, 1900
Alwart ____________ __ Nov. 5, 1918
Joenck ___________ __ Sept. 8, 1908
FOREIGN PATENTS
Country
Date
Great Britain ____ __ Oct. 11, 1928
Netherlands ______ __ May 15, 1940
Great Britain ____________ __ 1903
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