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Dec. 31, 1946.,
'
E. L, wlEGAND
2,413,479 '
CONVEYING OF MATERIALS
Original Filed Dec. 7, 1939
6 Sheets-Sheet 1
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Edwin LW'mganqi
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Dec. 31, 1946. '
E. L. WIEGAND
2,413,479
CONVEYING OF MATERIALS
Original Filed Dec.‘ 7, 1939
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CONVEYING 0}?‘ MATERIALS
Original Filed Dec. 7, 1939
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Dec. 31, 1946.
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E. L. WIE'GAND
CONVEYING OF MATERIALS
Original Filed Dec‘. 7, 1939
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' Dec. 31, 1946.
2,413,479 .
EL. WIEGAND
CONVEYING OF MATERIALS
Original Filed Dec. '7, 1939
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2,413,479
Patented Dec. 31, 1946
UNITED STATES PATENT OFFICE
2",41s,47§
CONVEYING OF MATERIALS
Edwin L. Wiegand, Pittsburgh,v Pa., assignor to
Orefraction Incorporated, Pittsburgh, Pa., a
corporation of Pennsylvania
Original application December 7, 1939, Serial No. ‘
308,002. Divided and this application August
28, 1944, Serial No. 551,561
7 Claims. (Cl. 302-53)
1
2
illustrated comprises a container 55 adapted to
contain material to be ground, and hereafter re
308,002, ?led December 7, 1939, now Patent 2,375,
ferred to as the new-materials container. The
057, and relates particularly to conveying of ma
new-materials container 50 may be formed with
terial, including by ?uid pressure, and the prin
an outlet spout 5| discharging into a funnel 52
cipal object of the present invention is the im
carried by the receiving end 53 of an elevating
provement of apparatus for that purpose.
device 54, such as the bucket elevator here shown.
In the drawings accompanying this speci?ca
A suitable slide valve 55 is interposed in the out
tion and forming a part of this application, there
let spout 5! to regulate the ?ow of material from
is shown, for purposes of illustration, one embodi
ment of apparatus embodying the invention, and 10 the new-materials container 50 to the receiving
end 53 of the elevator 54. The elevator 54 may
in these drawings:
be driven by means of an electric motor 55, and
Figure 1 is a more or less diagrammatic view
may also have a signal device, such as the electric
of the relation between material conveying means,
light 57, to indicate when the elevator 54 is op
grinding means, and separating means, as these
means may be utilized in one embodiment of my 15 erating. The discharge end 58 of the elevator 54
discharges into a conduit 59 leading to a blend~
invention,
ing and metering hopper 50, desirably provided
Figure 2 is a sectional view of a material hopper
with an inclined false bottom Ella, and having
and control device,
high and low limit ‘controls 6! and 62, so as to
Figure 3 is a more or less diagrammatic view,
particularly showing the ?uid connections be 20 control operation of the motor 56 of the elevator
54, the connections being such that the motor 55
tween parts of the apparatus,
of the elevator 54 is automatically started when
Figure 4 is an enlarged sectional view of the
the level of the material falls below the low level
solids metering and hoist tank, parts being shown
device 62, and the motor 55 is automatically
in elevation, and parts being broken away, this
View showing a solids inlet valve for the tank in 25 stopped when the material rises up to the high
level device 6 I.
open position,
Preferably, the high level control 6| comprises
Figure 5 is a fragmentary detail view showing
a rotatable housing disposed at the outside of the
the solids inlet valve in closed position,
hopper, the housing containing a mercury switch
Figure 6 is a section taken on the line 6—6 of
Figure 5, looking in the direction of the arrows, 30 which is electrically connected to the motor 55,
the housing being rotatable in one direction by
Figure 7 is an elevational view showing the re
a vane Bla within the hopper 5!! (see Figure 2).
lationship between an air strainer tank and upper
The low level device 52 comprises a pivoted vane
and lower material feed tanks, and showing also
62a, within the hopper 60, urged counterclock
valves in the connections in a certain position,
Figure 8 is a'view similar to Figure 7, omitting 35 wise, as viewed in Figure 2, by a counterweight
62b. The vanes 5 la and 62a are shown in Figure
the air strainer tank and certain other parts, and
2 in the position they occupy when the hopper 50
showing the valves in full lines in a di?erent po
is full of material, as indicated by the upper dot
sition, and in dotted lines in still another posi
ted mount line M, the vane Eta standing about
tion, and including the means for actuating the
45°
counterclockwise to the right of the vertical
40
valves,
and the vane 62a about 45° clockwise to the left
Figure 9 is a section taken on the line 9-9 of
of the vertical. The vanes 6 la and 62a are shown
Figure 8,
as connected by a lost motion connection which
Figure 10 is an enlarged fragmentary sectional
includes a rod 620 disposed at the outside of the
view through the upper and lower material feed
45 hopper 60, pivoted at its lower end to a crank 62d
tanks,
movable in unison with the vane 62a, and having
Figure 11 is an enlarged sectional view through
at its upper end a slot with which cooperates a
one of the valves shown in Figure 10,
pin on a crank 62c movable in unison with the
Figure 12 is a sectional view corresponding gen
This application is a division of my application
vane 6 la.
‘
erally to the line [2-42 of Figure 11, parts being
Withdrawal of the material from the hopper 65
50
shown in elevation, and
causes the surface of the mound of material to
Figure 13 is an electrical diagram, showing the
fall, but for the time being the vane Bia, by fric
electrical connections between parts comprised in
tion adjustment of its shaft, remains in the po
the apparatus.
sition shown in Figure 2, even though the surface
Referring to the schematic arrangement shown
in Figure l, the embodiment of the invention there 55 of ‘the mound adjacent the vane ?la recedes away
2,413,479
4
3
from that vane.
When the mound of material
decreases in height so that its surface adjacent
the vane 62a recedes sufficiently away from that
vane, the counterweight 82b causes counterclock
wise rotation of the vane to a position about 45°
counterclockwise to the right of the vertical, such
movement being transmitted through the lost mo
conduit 82 to permit transfer of material from
the upper tank 19 to the lower tank 8!, and to
enable the lower tank to be maintained under
pressure.
The lower tank 8! has an outlet con
duit 86, a valve 85 being interposed in the outlet
conduit iii for permitting or interrupting the
outflow of material from the lower tank 8!.
tion connection so as to move the vane 6 la clock
Means, shown in Figure 3, is provided for admit
wise to a position about 45° to the left of the
ting air under pressure to the upper and lower
vertical, thus moving the mercury switch to 'its' 10 tanks 19 and Bi, as will more fully appear.
“on” position, in which position it completes the
Assuming that the valve 83 is closed and the
circuit through the motor 55, whereby material
valve 85 is open, and assuming also that material
is delivered to the hopper Si! by the elevator 56.
is in the lower tank 8 l, and that this tank is under
When the mound of material in the hopper in
air pressure, the material from the tank 8! will
creases, either by reason of delivery by the ele
be forced through the outlet conduit 8-4, and
vator 54 or otherwise, as will appear hereinafter,
through a hose conduit 86 to the breech 8‘! of
the material acts against the vane 62a and even
a gun 88, and through this gun 88 to the grinder
tually moves the vane 62a clockwise, into the posi
case 89, the ground material passing through a
tion shown in Figure 2, against the urging action
conduit 98 to a ?rst separating device 9! of the
of the counterweight, ‘when the mound reaches
cyclone type, The heavier material in the ?rst
the height indicated by the lower dotted mound
‘separating device 9i may gravitate past a check
line m. However, such movement of the vane 62a
valve 92 used to build up a “head” of material
will not affect the vane Ella because of the lost
at the discharge end of the ?rst separating tank
motion connection therebetween. When the
9!, through a conduit 93 to a funnel 94, and from
mound of material rises enough, the material 25 ‘the funnel 94 to a screen chamber 95 of a screen
will act against the vane .65a and eventually
ing device 96. The screening device 95 may be
move it counterclockwise to the-position shown in
of the vibrating type, having a screen 97 over
Figure 2, when the mound has increased to the
which the material is shucked, the screen having
upper dotted mound line M, thereby causing rota
a certain predetermined mesh size, as for ex
tion of the mercury switch to its “0 .” position,
ample 200 mesh.
and thus interrupting the circuit of the motor 58.
The material which passes through the screen
Positioned alongside of the hopper 60 is a
9'1 falls into a hopper 93, the outlet of the hopper
second elevator 63, having its inlet end ‘54 re
93 having a bagging device 99, to which a bag
ceiving material from the lower end of the hop
I99 is attached, the bag I80 receiving such mate
per Ell, as by means of a conduit 85, a suitable
rial for shipment if desired. For convenience, the
slide valve 66 being so interposed as to control
bag 19%] may be disposed on a platform ml of a
the amount of material ?owing from the hopper
scale Hi2, so that the amount of material deliv
6!}. The elevator 53 is driven by an electric motor
ered to the bag Hi0 may be weighed as it is de
61, and may have a signaling device, such as the
livered to the bag. That material which does
electric light E3, to indicate when the motor 6? is
not pass through the screen 9"! is discharged from
running. The discharge end 63 of the elevator
the screen chamber 85 through a conduit “13, and
63 leads to the inlet of a solids valve ‘Hi the outlet
back to the mixing hopper 65]. Additional mate
of which communicates with the interior of a
rial, from the new materials container 56, may
charge metering and hoist tank ll. The hoist
be added to the hopper Si! by means of the ele
tank ‘H has high and low level devices 12 and 45 vator 513, the high level device GI limiting the
73 respectively, so related to other parts (as will
amount of new material delivered to the hopper
more fully appear) as normally to cause the
B9. In this manner the material removed from
motor 6? to operate when the material is below
the system is automatically replaced with new
the low level device ‘53, and to interrupt the cir
material from the new materials container 53.
cuit of the motor 6'! when the material reaches
The slide valve 55 may be adjusted to a particular
the high level device ‘i2.
?ow rate, such rate being determined by'the rate
A ?uid under pressure, in the present instance,
at which ?nished material is removed from the
air, may be admitted to the hoist tank TH through
system. >
a conduit ‘i4, and such air may be released from
Additional separating means ,is provided for ad
the hoist tank ‘H through either the conduit ill
ditionally separating that material which does
or a blow-off conduit ‘l5. With material in the
not gravitate from the ?rst separating device 9!,
hoist tank 1!, and air under pressure supplied
and this means comprises, among other parts, a
to the hoist tank l'l through the air conduit 1%,
pump, in this instance a blower fan ltd, disposed
the material in the hoist tank ‘H is forced to
within a fan chamber Iii-5 and driven by an elec
move through a conduit 16 to a connection con 60 tric motor I06. The outlet of the fan chamber
duit ll" between an air strainer tank "i8 and an
#35 is branched, one branch NH leading to the
upper material feed tank 19, a valve 89 being
atmosphere, and the other branch I88 being con
interposed in the connection conduit TI to per
nected to one end of a conduit I09, the opposite
mit admission of material to the upper tank ‘i5
end ll!) of the conduit I09 leading tangentially
and to enable the tank to be placed under ?uid
into the ?rst separating device 53!, if desired in
pressure. Assuming the valve 80 to be in open
two diametrically disposed tangential branches
position, the material which passes through the
Hlla and Hill). Slide valves H! and H2 are re
spectively interposed in the branch conduits l0‘!
conduit '16 is delivered to the connection conduit
‘H, the air used for hoisting purposes being
and‘lilB, these valves being independently adjust
strained by and vented from the strainer tank 70 able so' as to regulate the amount of air dis
charged by the blower through the respective
18, and the material dropping into the upper feed
tank 19.
branch, for a purpose to appear.
The upper feed tank ‘is is connected to a lower
The ‘upper discharge outlet of the separating
feed tank 8| by means of a connection conduit
device 9| is connected to the inlet of the blower
82, a valve 83 being interposed in the connection
chamber 565, and in this instance certain devices
2,413,479
5
are interposed in this connection. Extending
from the upper discharge outlet of the first sep
arating device 9| isa separating column, H3, of
any suitable cross-sectional form, area, and
length, which extends vertically and is connected
to a conduit H4 which is tangentially connected
to the upper end of a second air separating de
vice H6. Desirably the separating column II 3
is enlarged with respect to the conduit H4, and
may taper toward its lower end to cause hin
dered settling. The device H6 may be of the
no back pressure is created in the conduit 98
leading from the grinder case 89. Also,; usually
the valves III and I I2 are adjusted to effect sub
stantially zero (atmospheric) pressure in the
grinder case 89, thereby to avoid back pressure in
the grinder case 89 that might interfere with the
120
operation of the grinder gun. However, it will
be apparent that the pressure conditions in the
grinder case and‘ in the separating system can
be regulated by adjustment of the slide valves I i I
and I I2 to obtain any desired pressure conditions.
Furthermore, the velocity of the upwardly moving
cyclone type, comprising a chamber having an
stream of air in the separating column H3 may
upper cylindrical portion In and a downwardly
be adjusted to a most suitable velocity so that the
tapering conical portion IIB. A bagging device
H9 is connected to the lower end of the conical 15 separating function of the column H3 will be
optimum.
portion H8, and has attached thereto a bag I29
The ?rst separating device 98 may be moved
for receiving material gravitating downwardly
from the position shown in full lines in Figure 1
of the conical'portion H8. The upper end of
to the position shown in dotted lines, wherein
the second separating device H5 is formed with
a housing I2I communicating with the interior of 20 its lower end vno longer communicates with the
conduit $3, but instead communicates with a con
the device H6. The housing I2I communicates
duit i35 leading to a tank Hi5, hereinafter re
by means of a conduit I22 with a dust collector
ferred to as a by-pass tank. The lower end of
or separator I23, which may be of any suitable
the tank I36 carries a bagging device I 3'6, to which
type. The lower end of the dust separator I23
has attached thereto a bagging device I25, and 25 a bag I38 may be attached, and a check valve l?d
is interposed in the conduit I35. In this position
the air outlet of the dust'separator I23 is con
of the device 9| the ground material, excepting
nected by’a conduit I25 to the inlet of the fan
only a controllable amount and size of very ?ne
chamber I85.
'
material, instead of going to ‘the screen chamber
Assuming that the motor Idiiis operating, and
that the valve H I is at least partially open, and 30 95, passes directly to the by-pass tank let. The
conduit H3 in this position may still be con
that ground material, along with air used in
nected to the conduit I M. The by-pass tank con
grinding it, is being delivered through the con
nection is particularly useful when it is desired
duit 98 to the ?rst separating device ill, the ma
to make an unscreened ground aggregate, with
terial which under the air conditions prevailing
in the separating system is not heavy enough to 35 only a minimum of extreme ?nes removed.
The ?uid pressure system is particularly shown
gravitate at once from the separating device M,
in Figure 3, and in this embodiment uses air as
will be picked up by the stream of air in the
the fluid, although any other suitable ?uid may
column H3. Some of this material will continue
be used. rThe system comprises an air compressor
to be carried by that stream to the top of the
I45, a conduit I46 leading from the air com
column H3 and through the conduit H4 to the
pressor M5 to an air storage tank Hi1, and a
upper end of the second separating device H8,
threeeway valve M8 interposed in the conduit
and will be caused to swirl in this upper end
M6, the valve H18 in one position establishing
because of the tangential connection of the con
communication between the compressor M5 and
duit H4. The heavier materials in the second
the storage tank M7, and in another position es
separating device H6 will gravitate downwardly
tablishing communication between the storage
through the conical portion H8, and will be de
tank I81 and a tank Hi9, hereinafter referred to
livered to the bag I28 through the bagging de
as the waste air tank, the latter tank having
vice H9. The lighter material will be carried
safety valves i578 adapted to open at a predeter
upwardly by the air stream through the housing
mined pressure, as for example 175 to 185 pounds
HI and the conduit I22, to the dust collector
per square inch.
I23, where the dust will be separated from the
To start the apparatus initially, the valve “38
air, the dust particles being discharged from the
is set to establish communication between the air
bottom of the dust separator I23 and to the bag
compressor I45 and the storage tank I41, and
ging devivce I24, and the air passing to the con
any desired pressure is built up in the tank ME’.
duit I25 and back to the inlet of the blower cham
~ber I85.
Some of the material which enters the
The valve M8 is then turned to establish com
munication between the storage tank I41 and the
separating column H3 from the separating de
waste air tank I49, and air is permitted to ?ow
vice 9I does not continue with the upwardly mov
to the tank hi9 until the predetermined pressure
ing stream of air into the conduit Ihl, but gravi
tates back through the stream into the separat 60 is built up in the tank I49. The valve I48 is then
turned to its'third position, wherein it establishes
ing device 9I and ?nally reaches the lower or
communication between the waste air tank I 49
discharge end of the separating device 9|, and
and a conduit I52, for a purpose hereinafter ex
thus the separating action of the system is im
plained. A manual control valve I55 may also
proved.
,
be interposed in the conduit I48 for controlling
. Depending upon the setting of the slide valves
the ?ow of air through the conduit I46, and a
I I I and I I2, either an under-pressure or an over
pressure indicator I56 may be connected to the
pressure condition (With respect to atmospheric
' pressure) can be made to exist in the ?rst sep
arating device -9I. - Usually the valve H2 is par
tially or completely closed, and the valve I I I par
tially or completely open, so that an under-pres
sure or partial vacuum exists within the ?rst
conduit I46 ahead of the valve I55. Pressure
indicators I55 and I56a may be connected to the
waste air, tank I49 and to the storage tank It‘;
respectively.
‘
'
Leading from, the waste air tank I69 is a .con
duit I59, a valve I68 being interposed in this con
separating device 91 and in the column H3,
duit to permit or interrupt ?ow of air there
whereby material readily passes from the grind
or case 89 to the ?rst separating device 9i, and 75 through, the valve I58 being actuated by means
2,413,479
7
of a solenoid Hit.
‘conduit I59, the valve i158 (assuming that this
The conduit I59 leads to a
manually operable valve I62, preferably of the
three-way packed plugcock ‘type, one outlet 163
valve is open), the conduits ltdzand 14, to the
hoist tank ‘II, and after a predetermined amount
of pressure has been built up within the hoist
tank ‘H, the material will be forced through the
conduit 'IGto the connection conduit 71, and into
the upper tank 19. The pressure required to
move the material in the hoist tank ‘II depends
of the valve E52 leading by means ofaconduit $64
to the inlet conduit ‘id of the hoist tank ‘II, and
the other outlet U55 leading by means of the
conduit I66 to a dust separator IN. The dust
separator I?‘l has an air ‘outlet I68 leadingtc a
mu?ler ltd for the purpose of mu?ling the noise
of the escaping air, the air pa'ssingfrom the
muliler Iiit to the atmosphere.
upon the characteristics of the material and the
speedwat'which it is desired to move such mate
'
The blow-off conduit ‘I5 of the hoist tank ‘H
is connected to a conduit I10 through a valve
I‘II interposed to permit or interrupt the ?ow
of air through the conduits ‘I5 and Ill?, the-valve 1i
I‘II being actuated by a solenoid I12. The con
duit I‘!!! is connected with the conduit 185, and
through the conduit I55 with a conduit H3 'which
leads to one outlet I ill of a manually operable
valve I35 which may be of the three-way type
in all respects similar to the valve I62. Another
outlet I'I? of the valve I15 is connected by means
while
of thethe
conduit
third outlet
iti o I18
theisthree-way
connected valve
by means
of a conduit H9 to the upper tank ‘I9, a check
valve I88‘ being interposed in the conduit ‘I79 to
rial. 'The air used to move the material to the
upper tank ‘I9 is ?ltered by passage through the
air strainer tank ‘I8 and escapes therefrom.
After all of the material has been hoisted t0 the
upper tank ‘I9, the operator may turn the control
lever-of the valve I62 from the “air input, hoist”
position to the “blow-oil” position, so that the
pressure within the tank ‘II may be relieved by
air flow through the conduit I 54, the/port I55
of the valve I62, the conduit I66, the dust sepa
rator tank I61, the muiii-er I69, and to atmosphere,
or the pressure may be relieved otherwise as
will appear hereinafter.
During operation of the apparatus, air under
pressure is delivered directly to the lower tank
8I by means of the conduit I83. Assuming that
the material in the lower tank is low, and that
permit air to ?ow only outwardly of the upper
material already has been hoisted to the upper
tank 18 and to prevent reverse flow.
tank ‘Iii in'a manner hereinbefore described, and
The present embodiment provides a separate
air compressor I8! for supplying air under pres 30 that the valves 86, 83, and 85, are closed, the
control lever of the three-way valve I95 is turned
sure to the upper and lower tanks 79 and 8!,
to “compress” position, and in this position of
The compressor Isl is connected to a storage tank
the valve I95 air from the conduit I52 passes
I82 by a suitable conduit as shown. Extending
through the valve H95 and through the conduit
from the storage tank I82 to the lower tank 8!
28%} to the upper tank “59, and air is thus ad
is a conduit 539 in which are interposed a line
mitted until the pressure indicator Z?l shows that
cock I83, a line gauge I811, a pressure regulator
the pressure in the upper tank ‘i9 is substantially
i35, a three-way meter by-pa'ss I86, another line
equal to that in the lower tank 8!. The control
gauge 58?, a stop cock I82, a stop cock It?a to
lever of the valve I95 is then moved to “equalize”
permit and interrupt the flow of air to the tank
position, whereupon the conduit E92 is shut oil”,
8!, and a check valve I9! to permit air to flow
and communication between the tanks l9 and
only into the lower tank 8! and to prevent re
iii isestablished by means of the conduit I91, the
verse flow. It will be apparent that the conduit
valve. £95, and the conduit 2%, so as to insure
I89 furnishes direct, regulated, and controllable
that the pressure within the lower tank SI is not
pressure to the tank 8i, so that material within
greater than that in the upper tank ‘I9. Then
the tank 35 will be positively forced out by this
the valve 83 is opened to permit the material
direct pressure through the conduit 86 and the
from the tank ‘I9 to pass to the tank 85. The
gun 88.
control lever of the valve I95 may then be moved
A conduit W2 is tapped into the conduit I89
to “dead” position.
between the regulator i823 and the stop cock
If desired, air under a pressure higher than
IBM, and has a check valve 593 interposed there 50
that within the tanks 79 and Si may be intro
in to permit air to pass only from the conduit
duced into the upper tank ‘i9 so as to force the
I8§ through the conduit E92 and to prevent air
material from the tank ‘i9 into the lower tank 8i.
from passing from the conduit £92 back to the
conduit I89.
The conduit N92 is connected to
which
one port
may
I913beofofa the
manually
three-way
operable
type valve
similar to
the valves I52 and H5, 3, second port let; of the
valve I95 being connected by means of a conduit
I 9'5 to the lower tank 85, a pressure indicating
device i923 being connected to the conduit I532’.
The other port I53 of the valve I95 is connected
by means of a conduit 2% to the upper tank ‘is,
To provide for such higher pressure air, a three
55 way valve 283 may be interposed in the conduit
2%, one port 253‘! of the valve 2533 being connected
to a conduit 2% tapped into the pressure line E39 '
ahead of the pressure regulator I93 to receive a
higher pressure than exists in the part of the
conduit I89 downstream of the regulator. The
other ports 29% and Bill of the valve R23 are in
terposed in the conduit 2%. Thus with the
valve2%3 inposition to establish communication
between the conduit 2% and the part 252% of
connected to this conduit 2%.
Describing generally the pressure system, it will 65 the conduit 288, and to cut off communication
with the part idea of the conduit 206,‘ the air
be assumed that material is in the hoist tank ‘II,
under
higher pressure in the upper tank ‘I9 will
but that no material is in the upper and lower
surge to the lower tank 8i, and will forcibly re- i
feed tanks ‘I9 and ill, and it will also be assumed
move any remaining material from the tank ‘is.
that the valve 88 in the upper tank is open, and
When all the material has been delivered to
that the valve 83 between the upper and lower 70
the lower tank at, the valve 83 is moved to closed
tanks ‘I9 and Bi , and the valve 85 below the lower
position, and the valve 35 "isopenedthus feeding
tank 8I, are closed. The control lever of the
material to the sun 88. To release the pressure
valve It? is turned to the ‘position marked “Air
in the upper tank ‘It, the control lever of the
input, hoist,” soas to permit air under pressure
valve I15 is ‘moved to v a position indicated by the
from the waste air tank I49 to ?ow through the 75 letter a, Iin whichv position the air from the upper
and a pressure indicating device v22H may be
2,413,479
9
tank 19 is permitted to move through the conduit
I19, the valve 115, the conduit I52, through the
valve I48, and to the Waste air tank [49, the
operator being noti?ed when the maximum pres
sure in the waste air tank I49 has been reached,
either by a single device, or by the blowing oif
of the safety valves l5ll. At this point the oper
ator may move the control lever of the valve I75
to the position indicated by the letter I), so that
10
formed respectively in the latching lever 249
and the lever 239, the apertures being alined
when the latching lever prevents movement of
the lever 239, as shown in Figures 5 and 6.
The
solenoid core 25| is biased to the locking position,
shown most clearly, in Figure 6, as by a spring
25m, and the construction and arrangement is
such that when the solenoid 259 is energized the
core 25! will be drawn into the solenoid, against
the bias of the spring 25m, thereby withdrawing
the remainder of the air under pressure from 10 the core 25! from the apertures 246a and 239a
the upper tank 19 may ?c-w through the conduit
and releasing the levers 246 and 239 for desired
I19, the valve H5, the conduit 1'53, to the dust
manual movement.
separator I61, through the mu?ler I69, and to the
Referring to Figure 4, it will be noted that when
atmosphere. After all the air under pressure has
the valve plunger 233 is moved to open position,
15
been removed from the upper tank 19, the control
the valve-body 234 will engage the elongated tube
lever of the valve H5 may be returned to its
2%!) and cause the valve-body to pivot about the
“dead” position. The valve 89 may then be
valve
plunger 233 to its open position as shown.
opened, and material may again be hoisted from
The air inlet conduit ‘l4, and the air blow-off
the hoist tank ‘H to the upper tank 19.
conduit 15, may be suitably coupled to spuds se
Referring to Figure 4, the hoist tank ‘H com
cured to the top wall 2“ to the tank ‘H. The
prises a cylindrical body Zlil having an integral
tube 2:19 is suitably connected to and in com
dome-shaped top 2| I and a downwardly tapering
munication with the conduit ‘It preferably of
bottom 2 l 2, the extremity of the bottom 212 being
rubber or rubber lined, and if desired the conduit
provided with a clean-out opening 2l3 which is
closed by a plug 2M, and extending centrally of 25 76, or the rubber lining thereof, may be contin
uous with the lining of the tube H9.
the tank ‘H is an elongated preferably metallic
The high level and low level responsive devices
tube 2 l 9 open at its lower end and screw-thread
12 and 13 respectively comprise housings 254
ed at its upper end and received within a coupling
rigidly carried by the tank 1|, as by means of
220 secured to the top 2!! of the tank 7!. The
tube 2I9 is ‘desirably provided with a rubber lin 30 plugs 255 threaded into collars carried by the cy
lindrical portion 219 of the tank 1|. Rotatable
mg.
within each of the plugs 255 is a shaft 256 carry
The solids inlet valve ‘m is carried by the top
ing a vane 251, the vanes being each suitably
2!! of the tank ‘H, the top 2! l having an interi
biased to a generally horizontal position as shown
orly screw-threaded tube portion 223 secured
thereto, as by welding, the tube portion 228 35 by the vane on the high level indicating device
.12, and being moved to a generally vertical posi
screw-threadedly receiving a tubular part 229
tion, as shown by the'vane of the low level de
which in turn screw-threadedly receives a nipple
vice 13, by the material within the tank 1 I, move
230 forming part of the valve casing, the con
ment of the shafts causing operation of switch
struction being such that the axis of the valve
10 is at an angle to and intersects the axis of the 40 means within the respective housings 255, as will
more fully appear. As shown in Figure 4, the
elongated tube 2“). The valve ‘19 has an inlet
tank 1! also carries a pressure responsive device
port 23! communicating with the discharge end
258, responsive to pressure within the tank, and
69 of the elevator 83, and also has a bearing 232
constructed and arranged to actuate a switch
for a valve plunger 233. Pivoted to the lower end
259 connected thereto for a purpose to be set
of the valve plunger 233 is a cap~form valve body
forth.
234 formed with an annular recess 235 arranged
The connection conduit 11, as best shown in
with a gasketed seat to close the inner extremity
Figure 10, comprises stub portions 269 and 26!,
of the tube part 229 when the valve body is in
respectively connected to the air strainer tank 18
closing position, as best seen in Figure 5.
The upper outer extremity of the valve plunger 50 and the upper tank 19, the stub portions 260 and
26!. being connected to oppositely disposed
233 is provided with a transversely disposed pin
branches of a three-way ?tting 262, the other
23% engageable with the de?ning margins of slots
branch of the ?tting 292 having therein a bush
23‘! formed in respective arms 238 of a bifurcated
ing or gland 263 through which is disposed a tube
operating lever 239, the lever being pivoted on a
258 the outer end of which is coupled to the con
pin 240 carried by arms 2M extending from the
duit ‘i6 and the inner end of which is formed with
casing of the valve ‘Ill. The lever 239 is operable
a downwardly curved spout 269 directed toward
by a handle portion 2112. Rotatable with the
the stub portion 26l of the conduit 11.
lever 239 is the casing 243 of a mercury switch.
The air strainer tank 18 is supported from the
The casing of the valve 19 is also provided with a
pair of ears 2M, carrying a pivot 245 for a swing 60 connection conduit 11, as best shown in Figure
10, the portion 260 passing through and being
able latching lever 2&6, the lever having an oper
suitably fastened to a bottom closure plate 210
ating handle 24'! and also having a notch 248 for
for the tank ‘[9. As can be seen in Figures 3 and
receiving a tooth or detent 2133 carried between
'7, the strainer tank 18 has a top closure plate 211,
the arms 238. As shown in Figure 5, with the
valve 70 in closed position, the detent 249 ?ts into 65 and a conduit 2T9 establishes communication be
tween the interior of the tank T8 and the interior
the notch 2A3 of the lever 246, and prevents open
of the dust separator [91. The lower open end
ing movement of the valve 19. The valve 10 may
of a dust bag 283, such as a dust bag ordinarily
be opened by manually engaging the operating
used on a vacuum cleaner, is suitably connected
handle 24'! and moving the latching lever 256 so
as to disengage the detent 2119, movement of the 70 to communicate with the conduit portion 26!].
Means may be provided for shaking the bag 283
lever 239 causing the detent 249 to ride on the
so that it may be kept in condition to ?lter and
adjacent marginal surface of the lever 266.
to permit the escape of the air used to hoist the
Means may be provided for locking the latch
material to the upper feed tank 19, and for that
ing lever 249, as a solenoid 250 having a core 25l
adapted to ?t slidably in apertures Zita and 23911
purpose the present embodiment comprises a
11
2,418,479
plunger 289 suitably passing through the top
closure plate 211.
The stub portion 261 of the connection conduit
11 is screw-threadedly received within a tubular
portion 291 (see Figure 10) forming part of the
housing for the valve 30 associated with the up
per feed tank 19. The upper tank 19 has its
upper and lower portions 298 of conical form.
part of the bore of the tube 310 extends to near
the inner end of the tube 319 so that the pack
ing 331 effectively prevents grit from getting be
tween the journal surface of the shaft 312 and
the cooperating bearing surface of the gland
3111a.
~
The lower feed tank 81 is formed in all re
spects similar to the upper tank 19, having upper
and lower conical portions 339, and also upper
open, and are surrounded by integral ?anges 301 10 and lower ?anges 333 and 334 respectively.
and 302 respectively. An annular ?ange 303
Underlying the lower ?ange 392 of the upper
overlies the upper ?ange 301, a gasket 3114 be
tank 19 is an annular ?ange 335 (see Figure 10)
ing interposed between the ?anges, and bolts 305
having a central screw-threaded aperture, and
pass through apertures in the ?ange 303 and are
overlying the upper ?ange 333 of the lower tank
received within screw-threaded apertures formed
8171s an annular ?ange 336 also having a cen
in the ?ange 301. The ?ange 3113 is formed with
tral screw-threaded aperture, and the connection
a central screw-threaded aperture for receiving
conduit 82 between the upper tank 19 and the
the lower threaded end of the tube portion 291,
lower tank 81 comprises a tube portion 331 which
and a valve-seat block 391 (see Figure 11) is
extends between and has screw-threaded ends
?tted into the lower end of the tube portion 291, 20 respectively received in the apertures formed in
and desirably is welded to the tube portion 291,
these ?anges 335 and 336. The tube portion 331
as shown at 398. Also the block 301 is formed
forms part of the valve housing for the valve
with a valve seat 3139, and extends partially into
83. Extending transversely from the upper end
the upper open end of the upper tank 19.
of the tube portion 331 is a bearing tube 338 in
Extending transversely from the upper end of
which is journaled a valve operating shaft 339
the tube portion 291 is a bearing tube 310, a web
having a squared end 340 for receiving an inter
31 1 reinforcing the connection between the bear
mediate portion 341 of a valve operating lever
ing tube 313 and the tube portion 291, and jour
342. The inner end of the valve shaft 339 is
The upper and lower ends of the tank '19 are
naled within the bearing tube 31 [1 is a valve oper
ating shaft 312 having a squared outer end 313
for receiving one end 314 of a valve lever 315.
The bearing tube 310 extends a slight distance
within the tube portion 291, and the operating
shaft 312 at this point is reduced in diameter
and squared to ?t into a squared opening formed in a crank 316, a set screw holding the crank
connected to a crank 343 in the same manner as
the shaft 312 is connected to the crank 316. A
rod 344, similar in all respects to the valve arm
319, is connected to the crank 343, and carries
a resilient valve body 343 which cooperates with a
valve-seat block 346, the parts 345 and 346 be
ing similar to the parts 321 and 301 hereinbefore
described. The valve shaft 339 may be packed
316 to the shaft 312. The crank 316 carries an
in the same way as the shaft 312.
off-center pin 311 (see Figures 11 and 12) ?t
The air strainer tank 18, and the upper and
ting through a slot 318 formed in a‘?attened
lower feed tanks 19 and 81, may be at least in
portion 321 of a rod 319, the pin 311 having a 40 part carried by a frame structure 341, resting
headed portion 320 holding the rod assembled on
upon a suitable supporting surface. The upper
the pin 311. The rod 319 also has a portion 322
and lower tanks 19 and 81 are further held rig
round in cross-section and slightly bent, as best
idly connected by means of a plurality of con
shown in Figure 12, and the lower end of the rod
necting rods 350 (see Figure '1) extending be
319 is formed with a conical enlarged portion 45 tween angle pieces 351 fastened to the respective
323 and with a reduced extremity 324 forming a
tanks.
shoulder 325 with the conical portion 323. A
Referring particularly to Figures 7 and 8, the
frusto-conical block 326, having a central aper
valves 80 and 93 are adapted to be moved in a
ture, is ?tted on the reduced extremity 324, and
predetermined order by operating means 356.
a resilient valve body 321, preferably formed of 50 The valve lever 315 has a pin 351 spaced from
rubber and having a generally frusto-conical out
the valve shaft 312, and the extremity of the
line, is ?tted over the reduced extremity 324, and
valve lever 315 is provided with a weight 358
an inverted cup-shaped disk 328 is positioned to
arranged to urge the valve lever arm 315 to its
hold the valve member 321 in position, a nut 329
valve-closing position shown in Figure '1. A resil
being screw-threaded on the end of the reduced
ient stopper block 359, desirably formed of rub
extremity to hold the disk 328, the valve mem
ber, is carried by the upper tank 19 in position
ber 321, and the block 326, in position on the
to limit movement of the weight 358. The valve
valve arm 319, the nut preferably being welded‘
lever 342 has a pin 36!] carried spaced from
to the disk 328 as best shown in Figure 11.
the valve shaft 339, the pin 360 being in longi
The valve 33 is shown in closed position in 60 tudinal alinement with the pin 351 carried by
Figures 10 through 12. Sufficient rotation of the
the arm 315. The valve lever 342 carries a weight
shaft 312 in a direction to cause counter-clock
361 arranged to urge the lever 342 to its valve
wise movement of the crank 316, which reference
closing position shown in Figure 7, a resilient
to its position shown in Figure 12, will cause un
stopper block 362 being carried by the lower tank
seating 0f the valve body 321 from the valve seat
81 in position to limit movement of the weight
399. The slot 318 permits the valve body 321
361.
to be pressed more ?rmly against the seat 309 by
The operating means 356 further comprises a
?uid pressure within the tank, and also permits
pair of longitudinally spaced-apart elongated
the pin 311 to give a hammer blow to the lower
metallic strips 363 and 364, the strips being ad
end of the slot in opening the valve.
70 justably connected by a turnbuckle arrangement
The bore of the bearing tube 310 may be en
365. The strip 363 has an elongated slot 366
larged so as to accommodate between it and the
for receiving the pin 351 carried by the valve
shaft 312 a tubular gland 319a forced against
lever 315, while the strip 364 has an elongated
packing 331 by a gland nut 332 threaded on the
slot 361 for receiving the‘pin 360 carried by
outer end of the bearing tube 310. The enlarged 75 the valve lever 342.‘ A coil spring 368 has its
2,413,479
13
tion.
ends connected respectively to the pins 351 and
380, the spring 368 additionally urging the valve
levers 3&5 and 342 to their valve-closing posi
14
The valve 85 is interposed in a conduit
388 which has its upper end connected to the
tube portion 353. The conduit 386 is reduced
in diameter with respect to the tube portion
353,v and the free end of the conduit 386 is pro
vided with a pair of nipples 381. A control device
tion shown in Figure '1.
Connected to the lower end of the strip 364 is
an elongated rod 369 having its lower end piv
388 is positioned adjacent the tube portion 353,
otally connected to one arm 310 of a bell crank
leverv 31!.v The lever 31! is pivoted at 312 to
a. supporting frame 313 carried from a suitable
supporting surface. Also carried by the sup
porting frame 313 is a quadrant 314. The other
arm 315 of the bell crank lever 31f is positioned
to indicate when a low level in the ‘lower, tank
81 has been reached, the device 388 comprising
a pivoted vane 389 disposed within the tube por
tion 353, a shaft carrying the vane being rotata
ble with the vane and being adapted to actuate
mercury switch means 390 disposed within a
housing 39!. When the level in the lower tank
8! falls below the level of the vane shaft, the
vane moves upwardly, thus causing desired actu
ation of the mercury switch 390.
In the embodiment shown (see Figure 7), one
of the nipples 381 of the conduit 386 is closed
to traverse the quadrant-314 and includes an
indicating portion 318 and an operating arm
311. The quadrant 31E is provided with three
notches‘ 318 located on the quadrant at the posi
tions marked with the legends “fill,” “compress,”
or “blow-off,” and “dump.” The operating arm
311 has a manually releasable spring-pressed
detent engageable within any one of the notches 20 by means of a cap closure 392, while the other
nipple 381 has securely clamped thereto one
318, to hold the arm 311 in any one of the posi
end of the conduit 86. The conduit 88 comprises
tions. The quadrant 314% also carries a solenoid
a heavy-duty ?exible tube 383, within which is
319 having a core 380 which is adapted to be 7
disposed a heavy-duty rubber hose 394, having
moved into the position shown in Figure 9 by
its one end securely fastened over one nipple
a spring 388a when the solenoid is deenergized,
381 and its other end extending into a "union
so that when certain conditions exist, as will
joint suitably connected to the breech 81 of the
appear, the core will extend into the path of
gun 88.
movement of the indicating device 318 to pre
In the simplest embodiment, the gun 88 serves
vent the operating arm 311 from being moved
to “dump” position.
to project the material at high velocity against
30
an anvil, as fully described in application Serial
With the operating lever 311 in the position
shown in full lines in Figure 8, that is, in the
Number 308,002, whereby the material'is disrupt
ed by impact. To propel the material through
“fill” position, the valve levers 315 and 3&2 are
in the position shown in full lines in Figure 8,
the gun 88 air pressures as high as 500 pounds
per square inch to the order of 1000 to 1500 pounds
per square inch, or higher, may be utilized, this
and the valve 80 is open and the valve 83 is '
closed, thus permitting material to be delivered
compressed air being supplied to the gun from
to the upper feed tank 18, while at the same
time permitting the maintenance of an operating
pressure within the lower tank 8|. It will be
noted that the slots 388 and 381 respectively
the tank 8|.
The gun 88 may include a booster
jet, indicated in Figure 3 by the diagonal arrow
against the diagrammatically indicated gun, and
this ‘jet may be connected to a conduit 434a (see
formed in the strips 363 and 364 are so propor
Figure 3) which is tapped into the main air pres
tioned that the weight 38! may maintain the
sure conduit I89 ahead of the regulator‘ I80, so
valve 83 in its closed position, while the weight
that if desired air may be delivered to the jet
358 is lifted to provide opening of the valve.
80. When the operating lever 311 is moved to > under a pressure either higher or lower than that
under which the air flows to the lower tank 81,
the “compress” or “blow-off” position, the valve
thereby
to permit adjustment to secude the opti
levers 3i5 and 342 are in. the position shown in
mum qualitative-quantitative output. A manu
Figure '7, in which position the valves 80 and
ally operated valve 436 is interposed in the con
duit 434a to control the ?owof air to the jet
and this valve is preferably closed and opened
when the valve 85 at the outlet of the lower tank
8| is closed and opened. A regulator may be in
terposed in the conduit 434a. if desired.
83 are closed, thus permitting ?uid under pres
sure to be admitted to the upper tank 19, while '
still permitting normal operation of the lower
tank 81. When the “operating lever 311 is moved
to “dump” position, that is, the dotted line posi
tion shown in Figure 8, the valve levers 3I5
The gun 88 may be of various embodiments, and
more than one gun may be utilized, as fully de
and 342 are moved to the position shown in ‘7'
dotted lines in Figure 8. in which position the
scribed‘ in application Serial Number 308,002.
valve 8i] is closed but the valve 83 is open, the
valves standing in these relations when the pres
sures in the tanks 19 and 8! have been equal
i‘zed, so that material from the upper tank 19
may pass to the lower tank 8|.
As vbefore mentioned, interlock means are pro
vided, so constructed and arranged that certain
parts of the apparatus are‘ permitted to operate
only when certain other parts are in a predeter
mined relation. Figure 13 shows an electrical di
During initial charging, it is preferable to close
the valve 85 at the outlet of the tank 8|, move
agram of‘ the parts comprising the interlocking
means and also parts comprising signaling means.
The devices shown in Figure 13, together with
their relation to other parts by which they are
controlled or which they control, are as follows.
The switch housing 243 carried by and for move
ment with the operating lever 239 on the solids
ment of the valve 85 being effected by a chain
38! movable about a pulley 882, the chain being
connected to a lever 385 connected to the plug
of the valve 85. The chain preferably has its
operating end positioned adjacent the operating
arm 311.
-
inlet valve 10, contains two mercury switches 625
and 626. Rotatable by the vane of the high level
Underlying the lower ?ange 334 of the lower
tank 8! is an annular ?ange 352 having a cen
tral screw-threaded aperture receiving a tube
portion
- control 12 of the hoist tank are two mercury
A suitable gasket 854 is interposed . ~
between the ?anges 334 and 352, and bolts 355
hold the ?anges 334 and 352 in assembled rela-’
switches 621 and 628, and rotatable by the vane
ofthe low level control 13 of the hoist tank 1|
are two mercury switches 629 and 630. Rotatable
15
2,413,479.
with the operating lever of the three-way valve
'
16
motor switch 662 is closed, the circuit of the
I62 which controls ?ow of air to or from the
motor 61 is from the main line wire 656, through
hoist tank 1| is a switch housing containing two
the motor switch 662, the armature of the motor
mercury switches 63| and 632. The solenoid I12
61 and the ?lament of the lamp 68 in parallel,
cooperates with a core 634 connected to the valve
through a conductor 663, the then bridged termi
"I in the blow-01f conduit I16, so that when the
nals 625a of the mercury switch 625, a conductor
solenoid is energized the valve |1| is opened.
664, the then bridged terminals of the mercury
Rotatable with the shaft 3|2 of the valve 60 is
switch 628 contained within the high level con
a casing 635 containing two mercury switches 636
trol 12, and a conductor 665, to the other main
and 631. The solenoid |6|, which operates the 10 line wire 651. When the level of the material
valve I66 in the air inlet conduit I56, cooper
reaches the axis 256 of the high level control 12,
ates with a core 666 connected to the valve I66 so
the vane 251 of the high level control is moved
that when the solenoid I6| is energized the valve
to rotate the‘ mercury switch 626, the mercury
I60 will be opened. Rotatable with the operat
of the switch 628 moving away from the terminals
ing arm of the three-way valve I95 which con 15 of the switch and interrupts the circuit, thus
trols ?ow of air to the upper tank 16 is a housing
stopping the elevator 66. At the same time the
640 containing a mercury switch 64L The hous
mercury in the switch 621 bridges the contacts
ing 6| forming a part of the high level control of
of that switch thereby completing a circuit for
the receptacle 66 contains a mercury switch 645,
a bell 666 or other signal, from the line 651,
and as before pointed out, the low levelcontrol 20 through a conductor 661 in which the switch 621
62 in receptacle 66 is mechanically connected to
and bell are interposed, through the switch 662
the high level control switch. The pressure re
to the other line 656. A switch 668 may be pro
sponsive device 256, disposed within the hoist tank
vided to manually interrupt the circuit of the
1|, operates the switch 256 which comprises con
signal 666.
tacts 646 which are held in open position by the 25
The solids valve 16 is then closed, as by moving
pressure responsive device 258 when a pressure
the operating lever 239 to its position shown in
above atmospheric pressure exists in the tank 1|,
Figure 5, and the latching lever 246 is moved to
but are biased to closed position in any suitable
latching relation with respect to the lever 239.
manner when there is no pressure within the hoist
This is possible because there is no pressure in
tank 1|. A housing 656 is rotatable with the 30 the hoist tank 1| and‘ hence the switch 259 is
shaft 336 of the valve 63 and contains a mercury
closed. The switch 256 completes a circuit for
switch 65 I.
the solenoid 256, since the solenoid and the switch
The devices shown in Figure 13 are connected
259 are interposed in seriesin a conductor 683 the
to operate as follows. A master switch 655 con
ends of which are connected to the line wires 656
trols the energization of main line wires 655 and
and 651 respectively. Since the solenoid 250 is
651, and all of the electrically operated parts of
energized, the core 25| has been withdrawn from
the apparatus receive electrical energy from these
the path of the levers 238 and 246.
line wires. To start the apparatus, the master
With the operating lever 236 of the solids in
switch 655 is ?rst closed. Assuming material is
let valve 16 in closed position, the casing 243
already in the new-materials container 56, a mo 40 will be rotated, so that the mercury in the switch
tor switch 658 is closed to cause energization of
625 bridges the terminals 625b and at the same
the motor 56 to start operation of the elevator
time unbridges the terminals 625a. Unbridging
54. Simultaneously the light 51, in shunt with
of the terminals 625a prevents operation of the
the motor 56, is energized, to indicate operation
motor 61 when the solids valve 10 is closed. With
of the elevator 54. The circuit of the motor 56 .' material in the hoist tank 1| at a level a de
and lamp 51 is from line wire 656, through switch
sired amount above the lower end of the tube 2|9,
656, the armature of the motor 56 and the ?la
the vane 25'! of the low level control 13 will rotate
ment of the lamp 51 in parallel, through the closed
the mercury switch 636, so that the mercury will
contacts of the mercury switch 645 of the high
bridge the terminals 636a. Then, if it is desired
level control 6|, through a conductor 666 con- .
to hoist material, the operating lever 311 of the
nected to the other line Wire 651. Thus it will
operating means 356 is moved to “?ll” position,
be obvious that the operation of the motor 56 is
so that the valve 66 is open, while the valve 83
dependent upon the position of the switch 665
between the upper and lower tanks is closed, and
contained in the high level control 6|, the con
the operating lever of the three-way valve I62
struction being such that when the level of ma- .
is moved manually to “air input, hoist” position,
terial falls below the low level control 62, the
thus rotating the mercury switch 63I, so that
switch 645 is operated to cause energization of the
the mercury will bridge the terminals of this
motor 56, and when the level of the material
switch. The opening movement of the valve 80
rises to the high level control 6|, the switch 645
causes the mercury in the switch 636 to bridge
is operate to interrupt the circuit of the mo 60 the terminals 636a. When all this has been done,
tor 56.
the solenoid |6| will be energized, thus opening
The operation of the motor 61 of the elevator
the valve I66, so that air may ?ow from the waste
63 is dependent upon the position of the high
air tank I 49 to the hoist tank 1|. The circuit
level control 12 on the hoist tank 1|, and on the
for the solenoid |6| is from the line wire 656,
position of the solids valve 16, which latter is
through the solenoid I 6|, a conductor 669, the
in turn controlled by the pressure. responsive
contacts 666a, a conductor 610, the switch 63l,
device 258, responsive to the presence or absence
a conductor 61|, the contacts 636a, a conductor
of a pressure within the hoist tank 1|. The
612, the contacts 625b, and a conductor 613, to
connections are such that in order to effect op
eration of the elevator 63, the valve 10 must have
been opened (which requires zero pressure in the
hoist tank 1|), and the level of the material with
in the hoist tank 1| must not be above the axis
the line wire 651. It is of course clear that open
position of any one of the switches in series with
the solenoid |6| will prevent energizing of the
solenoid, preventing air supply from the valve
I 60 unless all is in readiness,
256 of the operating vaneg261 of the high level
When enough material has been hoisted. from
control 12. When these conditions exist, and a 75 the hoist tank 1|, so that the level of the mate
1214132479
,17
:rial falls below 1 the axis 256 of the vane 251
of the low level device 13, the vane 251 will'ri'se,
thus rotating'the switches 629 and 639, the mer
>cury of the. switch 630 now bridging the termi
nals 63017, and the mercury in the switch 629
now bridging the terminals of that switch.
Bridging of‘the terminals 63Gb lights a signal
18
the valve I95 is moved from “compress” posi
tion to “equalize” position, such movement caus
ing rotation of the casing 649, so that the mer
cury bridges the terminals of the mercury switch
6M, and causes energization of the solenoid 319,
thereby withdrawing the core 369 from the path
of movement of the indicating portion 316 of
the operating lever 311, The solenoid 319 is so
lamp 618, which may be of amber color, to in
energized since it and the switches 6M and 631
dicate that a low level has been reached, the 10 are connected in series in a conductor 691 the
terminals 639!) and the, lamp 618 being .inter
ends of which are connected to the line wires
posed in series in conductor 680, connected at its
656 and; 651, it being remembered that theswitch
ends to the line wires 656 and 651. The interrup
631 was previously closed by closure of the valve
tion of terminals 630a, interrupts the previously
99. The operating lever 311 may now be moved
traced circuit of the solenoid I6I, thereby caus
15 to “dump” position, whereupon the valve 60 at
ing closure of the air inlet valve I66. At the same
the inlet of the upper feed tank 19 remains
time, bridging of the terminals of the switch 629
closed, and the valve 63 between the upper and
causes energization of the solenoid 112, thereby
lower tanks is opened, such movementiof the
causing opening of the blow-off valve I1 I. The
valve 63 causing movement of the casing 659,
solenoid I12 is energized from the line wire 656,
so that the mercury in the switch 65! bridges the
20
a conductor GBI in which the solenoid is inter
terminals 65lb, thereby causing energization of a
posed, a conductor 682, through the terminals of
red light 688, which is interposed in series with
switch 629, through conductor 689, to the line
the terminals 65“) in a conductor 689 the ends
wire 651. Closing of the inlet valve I60 and
of which are connected to the line wires 655 and
opening of the blow-off valve I1I of course re
651. The red light 688 indicates that material is
25
lieves the pressure in the hoist tank H and hoist
being dumped. The green lamp 685 is out, by
’ ing of material ceases.
reason of opening of terminals 65Ia, if the valve
Material having been, hoisted into the upper
83 is open or is not tightly closed, and the red
feed tank 19 from the hoist tank 1|, the oper
lamp 688 is lit when the valve 93 is open or
ating lever 311 of the operating means 356 is
not tightly closed.
“then moved along the quadrant 314 from “?ll”
After the material has been dumped from the
position to “compress” position, thus causing clo
upper feed tank 19 to the lower tank 9|, the
sure of the valve 89 at theinlet of the upper
operating lever 311 of the operating means 356
.tank 19. The valve 83 between the upper and
'
is moved along the quadrant to “blow-oil” po
lower tanks remains closed. With the valve 83
sition, in which position the valves 89 and 83
closed, the mercury switch 65I carried by the cas 35 are still closed, and the operating lever of the
ing 659 rotatable with the valve 83, is in such
valve I95 is moved from “equalize” position to
position that the mercury bridges the terminals
“dead” position, the latter action immediately
65Ia of the switch 65I, causing energization of
causing deenergization of the solenoid 319, so
a green light 695, and the green light is ener
that the core 389 is moved by the spring 389a
40
gized at all times when the valve 83 is tightly
to the position wherein it prevents the operat
closed; The green lamp 685 and the terminals
ing lever 311 from being moved to “dump” po
65m are interposed in series in a conductor 664
sition. The movement of the operating lever of
connected at its ends so as to be energized from
the valve I95 to “dead”.position e?ects de'energi
the line wires 656 and 651. Closing of the valve
45 zation of the solenoid 319, since in that position
.80 causes rotation of the switch casing 635, and
‘the mercury in the switch 64! is moved from
effects shifting of the mercury switches 636 and
bridging relation with respect to the terminals of
631, so that the. mercury. within the switch 636
the switch. The valve 85 at the outlet of the
unbridges the terminals 636a and bridges the
lower tank 8| is then opened to permit the fluid
terminals 636b, and, the mercury in the switch
under pressure in the lower tank to convey the
631 bridges the terminals of that switch. Bridg
material within the lower tank to the gun breach
ing of the terminals 636b, completesv a circuit
_81 and gun 8B.
.
for the solenoid I12, from line wire 651, through
To give a signal before the material is com
a conductor 686 in which the terminals 6361)
pletely exhausted from the lower tank ill, the
are interposed, to the conductor 69 I, through the
switch 388 is so arranged in the outlet conduit
55
solenoid I12, to the line wire 656. This insures
of this lower tank that when the material falls
that the blow-off valve I1I will be open when
.below the pivot of the vane 389, the vane may
the valve 86 is closed, so that even if air under
be spring pressed or otherwise moved to a sub
pressure seeped into the hoist tank ‘II, it could
stantially horizontal position, so as to energize
,not set up pressure that could cause hoisting
a red light 699, and to cause ringing of a bell
of material at this time, which would be unde 60 69!, the circuit for the lamp 699 being from
sirable, because the valve 86 is closed, and hoisted
the line wire 656, the conductor 686, a conductor
.material "would -be1 blown’ into the bag 283. The
693, through the lamp 696 and the switch 390,
control-lever of the valve I95 is, now moved to
to the conductor 666, to the line wire 651, and
.“compress” position, such movement causing ro
the bell 69I' being connected in shunt with the
tation of the switch casing 649 movable with 65 lamp 695], and if desired, controllable by a fur
the ‘operating lever of the valve, in such direc
ther switch 694.
tion” that the mercury is moved from bridging
' To relieve the upper tank of pressure, so that
relation with respect .to the terminals of the
this tank may be in condition to receive another
rswitchi64I, thereby‘ insuring deenergization of
charge of material from the hoist tank H, the
the solenoid 319v so that the core 389 prevents 70 operator moves the operating lever of the valve
movement ofethe lever, 311 to the “dump” posi
I15 to the position indicated by the letter a,thus
tion at this time. ~ v
permitting flow of air along the conduit I19,
After-the’ pressure in'the vupper tank 19 has
through the body of the valve I15, through the
been ‘raised. to‘or substantiallyv near the'pres
conduit
I52, to the waste air tank M9,,until the
sure in the lower tank 8i, the operating lever of 75
42,413,479
1
19
20
"safety Valves I56 indicate that the tank I49 has
received its full charge, at which point the oper
enabled to be continuous‘, but 'interruptible' when
ator moves the operating lever of the valve I 15 to
From the foregoingiit' also'will be apparent to
those skilled in :the art that ‘the illustrated ap
desired.
the position indicated by the letter b, ‘to permit
the remaining air to flow from the upper tank 19
‘
'
‘
‘
J
paratus embodying my invention provides new
through the conduit I19, through the body of the
and improved apparatus for carrying out‘the proc
valve I15, and ‘through the conduit I 13, to the
essing of materials, and, accordingly accom
air separator I 61, through the mu?ier I69, and to
plishes the principal object of my invention. On
the atmosphere. After all the air under pressure
the other hand, ‘it also will be obvious to'those
has ‘been exhausted from the upper tank 19, the 10 skilled in the art that the illustrated embodiment
operating lever 311 may be returned to “?ll” po
of my invention may be variously changed and
' sition, thus opening the valve 86, so that the upper
modi?ed, ‘and features thereof, singly ‘or collec
‘tank 19 is in condition to receive another charge
tively,'embodied in combinations other than those
1 of material.
"
>
v ‘Assuming that the valve -I62'is~ in the “dead”
position, that the solids valve 16 is open, and that
the low-level control 13 is in the position corre
sponding to low level of material in the hoist-tank,
the terminals of the switch 632 associatedgwith
the
0f the
valve
switch
I62 626
will associated
be bridged,
with'the
and thesolids
terminals
valve
10 will also be bridged. This completes a circuit
for the solenoid I12 from the line wire'651, the
conductor 695 in which the switches 626 and 632
_ are interposed in series, to the conductor 632, ‘to
the conductor 68I, through the solenoid I12, to
thevline wire 656. ‘Therev is also a circuit for the
solenoid I12 from the line wire 651, the conduc
‘tor 680, the conductor 682 in which the switch
- 629 is interposed, the conductor 68L through. the ' ~
solenoid I12, to the line wire 656. Assuming that
the elevator motor 61 is set in operation, as here
inbefore described, and the level of material rises
in the hoist tank 1|, when the level rises enough
to cause the low level control 13 to respond, the
switch 629 opens, but the solenoid I12 remains
energized as long as the switches 626 and 632 are
closed, and even after the switches 626 and 632
_ are opened, the solenoid I12 still will remain en
ergized, if the valve 86 is in such position that
the terminals 6361) of the switch 636 are bridged.
Besides the automatic control of the solenoid
I12 for the purpose of opening the blow-offv valve
I1I, to relieve pressure in the hoist tank H, the
pressure may be relieved manually by moving the '
control lever of the valve I62 into the “blow-off”
position, whereby the air may ?ow out through
conduits 14 and I64, through the valve I62, to the
conduit I66, to the conduit I13, and thence to
atmosphere, at the mu?ler I69.
_
The valve 35 is closed when initially charging
vthe apparatus, and may also be closed for inter
.rupting the process ‘temporarily without relieved ’
illustrated;withoutideparting from the spirit'of
is my invention or sacri?cing the advantages thereof,
and'a'ccordingly, that'the disclosure ‘herein is il
lustrative only,"and that my invention is‘n‘ot’lim
ited thereto.‘
I
claim:
"
"
'
‘
'
‘
I
'
'
'
-
1. Means for conveying material bymeans of
?uid under pressure, comprising: a tank having
an inlet through which material may be received
and an outlet through which material maybe
discharged‘; valve" means controlling said mate
rial inlet; means adapted to locksaid material
inlet valve means in closed position';v7operating
means, for operating'said material inlet valve
means, ‘so constructed and arranged ‘that it is
operable to open said“ valve ‘means-"only vwhen
said locking means iscaused to release said ma
terial inlet valve means; means for introducing
?uid under pressure into said tank; said tank
having an outlet through which ?uid under pres
sure may be discharged; valve means controlling
said pressure outlet; means, responsive to the
level of material in said tank, so constructed and
arranged that said pressure‘ outlet valve means is
actuated to open position to reduce the ?uid
pressure‘ in said tank to atmospheric pressure
when the level of material in said'tank is below
a"predetermined level; means responsive to the
?uid pressure in said tank;_ahd means, control
ling said locking means -in_ response to said pres
sureres'ponsive means, so constructed and ar
ranged that said locking means releasessaid ma
terial inlet valve means vupon reduction in said
?uid pressure to atmospheric pressure.
‘
_' 2. Means for conveying material by means of
?uidrundervpressure, comprising: a tank‘having
‘an inlet through which material may be received
and " an outletthrough which material may be
discharged; valve means‘ controlling said 'mate
rial inlet;_ means adapted to, lock said material
pressure on the lower feed tank 8|, or at the end
‘inlet valve‘ means in closed position; operating
of a run prior to a subsequent initial charging 55 means, for operating‘sai'd material inlet valve
or beginning of operations. In other Words, it is
means, so constructed and arranged that it is
closed before initially charging, or at the end of
a‘ day’s run, or for temporary interruption, and
it is opened when beginning operations, as at the
beginning of a day, or after an interruption as for
‘ inspection or adjustment of other equipment.
While the material in the lower-feed tank8l
is being ground, the hoist tank 1| will have again
been ?lled, with either new material or with a:
mixture of new and partly ground material from
,overage from the screen 96, and’ this" charge will
have been hoisted, and all is in readiness to
“dump” the same into'the tank 8I' when the -“low
level” responsive ‘device in the loweritank, BI in
dicates suf?cient evacuation to receive the next
charge'from the upper feed tank16.
" ‘
, From the foregoing description of the apparatus
and-the operation thereof; it will 'be apparent ‘
that Operation of the apparatus and'proces'si'affe *
operable to open said'vmaterial inlet valve means
only when said locking means is caused to re
lease said material inlet valve means; said tank
having a pressure outlet through which ?uid un-
der pressure may be, discharged; valve means
controlling said pressure outlet; ‘said ‘tank hav
ing a pressure inlet through which ?uid under
‘pressure may be admitted; valve means control
lingsaid pressure inlet‘; means,vv responsive to the
level 10f material in said tank, so constructed and
arranged that said pressure outletf-valve-imeans
,is actuated to open'p'osition' and'lsaid pressure
inlet valve means isactuatéd to' closed position
‘when the level of material in~ said tank-is‘ below
“a predetermined-level to reduce‘the L?uis, pressure
in, said tank to atmospheric pressure; ‘ "ea‘nsre
sponsive to'the' ‘fluidprés'su‘re'iri-i‘saidi ank,‘ ~and
fineans, controlling *saidil'ockingf means iii-response
‘to‘is‘aid pressurelresponsive'imea?s‘so"'cbnstruet
2,413,479
,
ed and arranged that
21
said locking means releases 6
said material inlet valve means upon reduction in
said ?uid pressure to atmospheric pressure.
3. In combination: a tank having an inlet
through which material may be received and an
outlet through which material may be discharged;
22
valve means is prevented if said second valve
means is in open position; and control means for
said fourth valve means, including means respon
sive to the position of said second valve means
and means responsive to the position of said third
valve means, constructed and arranged to cause
?rst valve means controlling said inlet; means
opening of said fourth valve means when said
second valve means is open and said third valve
for connecting said tank to a source of ?uid under
means is closed.
pressure; separately operable second valve means
interposed in said connecting means; said tank
6. Means for conveying material by means of
?uid under pressure, comprising: a tank having
having a pressure outlet through which ?uid un
a ?rst inlet through which ?uid under pressure
der pressure may be discharged from said tank;
may be admitted, and also having a second inlet
through which material may be received, and
third valve means, controlling said pressure out
also having a pressure outlet through which ?uid
let; and control means for said third valve means,
including means responsive to the position of said 15 under pressure may be discharged from said
tank; ?rst valve means controlling said ?rst in—
?rst valve means and means responsive to the
position of said second valve means, constructed
and arranged to cause opening of said third valve
let; second valve means controlling said second
inlet; third valve means for controlling said
pressure outlet; means for separately operating
means when said ?rst valve means is open and
20 said second valve means and said ?rst valve
said second valve means is closed.
means; and control means, responsive to the posi
4. Means for conveying material by means of
tion of said second valve means, including means
?uid under pressure, comprising: a tank having
for controlling said ?rst valve means, and includ
a ?rst inlet through which ?uid under pressure
ing means for controlling said third valve means,
may be admitted, and also having a second inlet
through which material may be received; ?rst 25 so constructed and arranged that when said third
valve means has been opened, said second valve
valve means controlling said ?rst inlet; means
means, when in open position, maintains said
for operating said first valve means to open posi
third valve means open, and said second valve
_ tion; second valve means controlling said second
means, when in open position, prevents opening
inlet; third valve means in series with said ?rst
valve means; means for separately operating said 30 of said ?rst valve means.
'
'7. Means for conveying material by means of
second valve means and said third valve means;
fluid under pressure, comprising: a tank having
means, responsive to the position of said third
a ?rst inlet through which fluid under pressure
valve means, so constructed and arranged that
may be admitted, and also having a second inlet
actuation of said third valve means to open posi
tion renders possible operation of said operating 35 through which material may be received, and also
having a pressure outlet through which fluid
means for said ?rst valve means; and means, re
under pressure ‘may be discharged jrom said
sponsive to the position of said second valve
tank; ?rst valve means controlling said ?rst in
means, so constructed and arranged that opera
let; second valve means controlling said second
tion of said operating means for said ?rst valve
means is prevented if said second valve means 40 inlet; third valve means for controlling said pres
sure outlet; means for feeding material to said
is in open position.
tank through said second valve means; means
5. Means for conveying material by means of
for separately operating said second valve means
?uid under pressure, comprising: a tank having
and said ?rst valve means; and control means,
a ?rst inlet through which fluid under pressure
may be admitted, and also having a second inlet 45 responsive to the position of said second valve
means, including means for controlling said ma
through which material may be received; ?rst
terial feeding means, so constructed and arranged
valve means controlling said ?rst inlet; means
that the operation of said feeding means is made
for operating said ?rst valve means to open posi
possible only when said second valve means is
tion; second valve means controlling said second
inlet; third valve means in series with said ?rst 50 open, and including means for controlling said
?rst valve means, so constructed and arranged
valve means; means for separately operating said
that the opening of said ?rst valve means is made
second valve means and said third valve means;
possible only when said second valve means is
said tank having a pressure outlet through which
closed, and including means for controlling said
?uid under pressure may be discharged from said
tank; fourth valve means, ‘controlling said pres 55 third valve means, so constructed and arranged
that when said third valve means has been
sure outlet; means, responsive to the position of
opened, said second valve means, when in open
said third valve means, so constructed and ar
position, maintains said third valve means open,
ranged that actuation of said third valve means
and said second valve means, when in open posi
to open position renders possible operation of said
tion, prevents opening of said ?rst valve means.
operating means for said ?rst valve means;
means, responsive to the position of said second
EDWIN L. WIEGAND.
valve means, so constructed and arranged that
operation of said operating means for said ?rst
Certi?cate of Correction
Patent No. 2,413,479.
December 31, 1946.
EDWIN L. WIEGAND
It is hereby certi?ed that errors appear in the printed speci?cation of the above
numbered patent requiring correction as follows: Column 9, line 6, for‘ “single” read
signal; column 14, line 47, for “secude” read secure; and that the said Letters Patent
should be read With these corrections therein that the same may conform to the
record of the case in the Patent O?oe.
Signed and sealed this 4th day of March, A. D. 1947.
[am]
LESLIE FRAZER,
First Assistant Oommissz'oner of Patents.
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