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Патент USA US2036522

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April 7, 1936°
w. J. ARMSTRONG
2,036,522
REDUCING MACHINE
Filed June 25, 1931
3 Sheets-Sheet 1
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[NI/ENTOR
Wa/fer- J. Arms fro/17.
April 7,-- 1936-
I
w. J. ARMSTRONG
2,036,522
REDUC ING MACHINE
Filed June 25, 1931
3 Sheets-Sheet 2
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Wa/P‘er J. Arms fro/1L7‘
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> April 7‘, 1936»
_
w. J. ARMSTRONG
2,036,522
REDUC ING MACHINE
Filed June 25, 1931
3 Sheets-Sheet 3
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I
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i1
[NVENTOR
Wa/f'er J. Arms fronj.
Patented Apr.v V7, 1936
, 2,036,522
‘UNITED STATES PATENT OFFICE
REDUOING MACHINE
Walter J. Armstrong, Columbus, Ohio, asslgnor
to The Jeffrey Manufacturing Company, Go
lumbus, Ohio, a corporation of Ohio
Application June‘ 25, 1931, Serial No. 546,879
10 Claims. (01. 83-11)
"The present invention relates to control
In order to secure synchronized feeding and
method and means for the feed and discharge of
rotary reducing machines for the shredding of
wet fibrous material such as wood chips, corn
stalks, bagasse, rags, etc. '
, . The principal object of the invention is to
provide an improved feed and discharge control
method and means adapted to the production of a
. relatively ?ne product in sufficiently large capac
10 ity' to insure economical operation of suchprotary
reducing machines.
,
-
,
It is the purpose of this invention to feed mate
rial to the reducing machine and hold it in the
, machine under controlled or retarded discharge
15 so that effective reduction is secured.
- According to the present invention, the feeding
and‘discharging‘ means which are provided are
capable of synchronization so‘that in continued
operation an amount of material is discharged
20 which is equalv to the amount of material fed, a
constant quantity‘ of material being maintained
in the working zone of the machine. This con
tributes to the production of a ?nished product of
uniform ?neness and eliminates-the possibility of
discharge effect, various arrangements are pos
sible. According to one embodiment of the in
vention to be hereinafter described, I provide .
separate feed and discharge conveyors of substan- 5
tiaily the same capacity and having independent
drives, each including change speed mechanism,
the conveyors also being independent of each
other, i. e., either one may remain stationary
while the other is operated. On the other hand, 10
given two conveyors of substantially the same
capacity and operated at substantially the same
speed, synchronization of-their operating‘ effect
may be secured by proper adjustment of the open
ings-through which feed and discharge are cf- 15
fected.
According to another preferred embodiment of
the invention, the upper and lower runs above
mentioned are the upper and lower runs of a sin
gle draft device so that relative’regulation of the 20
speeds of‘ the runs is not possible. Synchroniza
tion is, therefore, secured by proper relative ad
justment of the feed and discharge openings.
According to one method of operation of either
25 shock to the machine due to overloading and in
embodiment of the invention, when operation of
sures against undesirable rises in the power con
the machine is to be initiated, the discharge ef
sumption which has been the inherent fault of . fect is held in abeyance until the material has
machines as heretofore used.
been fed into the working zone to substantially
1 According to one preferred embodiment of the‘ fill the latter.
’ 30 invention, the feeding and discharge means are
According to another method of operation of
preferably in the form, of superposed conveyor either embodiment of theinvention, when opera
., runs, the upper conveyor run serving to' support tion of the machine is to be initiated, the feed is
and feed the material to the machine and the stepped up, in either embodiment by adjustment
lower run serving to engage and remove the mate
of the feed opening and/or in the one embodi
35- rial which has passed through the working zone. ment by increasing the speed of the feed conThe discharge end of the working zone is up
veyor so that the amount of feed is greater than‘
wardly faced and the lower conveyor run being in the amount that will be discharged, so operating
overlying relation thereto may serve to hold the the feed until material has been fed into the work—
, material in the working zone for more prolonged ing zone to substantially fill the latter. Upon
40 action than has heretofore been possible. For ex
continuation of the feed, synchronized discharge
ample, the discharge device may be operated at a is initiated so that a quantity of material sub
speed insu?icient to remove the material at the stantially equal to that initially fed into the work
speed with which it is passed through the work
ing zone is always maintained in the latter so that
I _ ing zone with a consequent backing up of thema
the most-favorable reducing effect and a uniform
45 ter'ial andprolonged action thereupon. At what
ever rate" the discharge is effected, feeding is ef- . product are secured.
In the accompanying drawings,
fected in ,consonance therewith. Preferably I
Figure l is a plan view of a reducing machine
utilizea machine having a grid formed ‘ofbars,
_ stacked .in laterally contacting relation, rather with the device of the present invention applied
56‘- than theusual spaced screen‘ bar or similar ar
rangement. Under these circumstances, all of the,’
thereto;
.
'
'
25
30
35
40
45
- 50
' Figure 2 is a section of the machine according
material vwhich; is fed to the feeding end of, the’ to‘Figure 1 in a perpendicular plane at right
working zone is' passed out at the discharge end angles‘ toithe rotor axis;
Figurel3 is an elevation of the machine of
an
hence is under the complete control'ofv vthe ’
discharge’apparatus."
Figures .li‘and 2; and
l
55
2
‘
2,036,522
Figure 4 is a section taken similarly to that
discharge opening of variable size is thus de?ned
of Figure 2 of a machine embodying the inven
by the lower run of conveyor 21 and apron 32.
tion in modi?ed form.
It will be noted that the lower run of con
Referring to the drawings, reference numeral 5 veyc-r 21 overlies the discharge end of the work
designates generally a frame in which is jour
ing zone so as to engage material rising from the
naled shaft 6 upon which is ?xed a rotor body ‘i latter and effect discharge over apron 32, the
to which are pivoted the swing hammers or direction of travel of the conveyor being that
beaters 8, the directions of rotation of the rotor , of the, arrow, Figure ,2. Adjustable guides as at
being that of the arrow, Figure 2. It should be 36, Figure 2, may be provided‘ in connection with
the casing side walls for engaging and support
10 stated at this point that the exact rotor con
struction is immaterial to the present invention ing the ends of ?ights 3| on the lower run of
and a rotor of .well known form has been shown the conveyer and a ba?le plate 31 underlying
as a matter of convenience. Supported beneath and supporting the flights I8 of conveyor £2 at
the rotor in conformation therewith is a grid com
the rearward portion of their lower run supports
15 posed of, laterally contacting bars 9 arranged on at itsrearward end a ?exible ba?ie member 58 in 15
an are concentric with the rotor and supported
by means of members as at Hi. It wiil be noted
that the tops of the bars 9 are provided with
sharpened abutment edges faced into the direc
20 tion of rotor rotation. The grid de?nes, together
with the rotor, a reducing zone having upwardly
faced feed and discharge ends.
Above the feed end of the reducing zone, the
casing 5 is provided with a feeding throat I I and
‘yielding contact'with the ?ights 3| of conveyor
1
The rotor shaft has ?xed thereto a belt pulley
39 belted to any convenient source of power,
while, as here shown, a small electric motor 40 20
zone is a feed conveyor which is generally indi
is provided for the drive of conveyors l2 and 21.
Reference numeral 4| designates a change speed
det’ice of well known construction. A drive pul
ley 42 vand a driven pulley 43 are connected
by a belt 44 and through manipulation of a hand
wheel 45 which actuates the lever 56, the size of
one pulley may be increased while the size of the
cated at l2.
other is simultaneously and proportionately de
extending through the throat in substantially
overlying relation to the feed end of the working
'
Conveyor l2 comprises head and foot shafts
creased so that a wide range of speed control with
30 I3 and I4 whose axes are in a substantially hori- I an in?nite number of variations is obtainable.
' zontal plane and are parallel to the axis of shaft
6. Shafts l3 and is‘ are journaled in the side
Drive pulley 42 is ?xed on a shaft 4‘! and through
walls of the casing and have ?xed thereto head
and foot wheels as at I5 and l6,‘which engage
35 endless chains, as at II, the chains being‘ con
nected by means of ?ights l8 which are in the
adapted to be connected to a gear 50 which
ieshes with armature pinion 5E. The power
take-01f pulley 52 of the change speed device is
form of angle bars having one web normal to the
path of movement of the conveyor. The upper
ley 54 ?xed on the head shaft I; of conveyor I2.
a. clutch 28 under the control of a. lever 49 is
in connection, by means of a belt 53, with a pul
Reference numeral 55 designates a change
run of the conveyor is supported on a plate l2a speed device similar to that already described,
40 which in turn is supported on shafts l9 and I4 , whose drive shaft 56 may be connected by means I.
through brackets I35; and lid.
'
'
of a cluteh 5‘!v under the control of a lever 58
Surmounting conveyor l2 and supported by the
casing 5 is a hopper I9 whose lower open end is
closed by the top run of conveyor l2 with the
45 exception of a feed opening 29 between the‘hop
per and throat II, the size of the opening being
controllable through adjustment of a sliding gate
2|, which is frictionally maintained in adjusted
with a gear 59 meshing with armature pinion
El. The power take-offpulley 60 isiconnected,
by means of a belt.6|,‘with a puiiey 6,2 ?xed on .
the head shaft 22 of conveyor 21.
It will thus be evident that the conveyors l2
and 21 may be driven independently and at indi
vidually controlled speeds.
’ ‘
‘
'
position. It will be evident that with conveyor
In the use of the machine, clutch 51 may be
50 I2 moving in the direction of the arrow, material initially disengaged and clutch 48 engaged so that =
will be fed out of thehopper through the feed _ material in the hopper will be fed through gate
opening 29 and to the feeding. end of the reducing 29 by conveyor 12, but its discharge will be pre
zone at a rate dependent upon the speed of the vented by conveyor 21 which is at rest. When
conveyor and the adjustment of gate 2|.
suf?cient material has been fed into the working
55
At the discharge end of the reducing zone, a zone to secure the best working eifect; therein,'
shaft 22 is journaled in the casing side walls and eonveyor 21 is setin m’otion through engagement
has brackets as at 23 swung thereon, the brackets of clutch 51 and thereupon the feeding and dis
having ?xed thereto a longitudinally ‘extensible charge effects may be synchronized through con
frame 24 which has ?xed to its other endv similar trol ofv the conveyor speeds, through adjustment .
60 brackets as at 25, in which is journaled a shaft of gate 2|, and through adjustment of the dis‘
26.
Shafts 22 and 26 constitute'the head‘ and
foot shafts of a ccnveyorgenerally- indicated at
2?, head wheels as at 28 being ?xed to'shaft
2E and engaging endless chains as at 3|)“ which
charge opening through vertical adjustment pf
the outer end of conveyor 21 which vfm'msthe
upper boundary of the discharge opening. ‘ ‘
Another method ofv ?llingfthe working zone
vupon starting the machine isv to open the gate 2| 65
so that the relative feed will be greater than‘ the
A discharge spout ?xed to the casingat the , discharge. Either method may be successfully.
discharge end of the working zone comprises a
bottom apron 32 underlying the outer end of the employed but it should be understood that te
conveyor 21 and side walls ,33_ and 34, between obtain the bestresults in reduction the'feed’and '
65 support ?ights 3| similar to ?ights l8, above;de—
scribed.
‘
1
i
>
'
which the end of the conveyor lies, Conveyor 21
is swingable about shaft 22 and ?xed to frame 24
are a pair ofpoutwardly, extending‘ bolts which
extend through arcuate slots 93' ‘and -_34’ to be
clamped to the latter by wing nuts as at 35.‘ A
discharge should bev synchronized immediately
after the working zone is ‘?lled so that a constant
‘quantity of material is maintained therein.
' Asexplained above, an imperforategrldisprefé
erably used as being best adapted to the ope'm- J
2,086,522
3
ing principle of the improved machine. Spaced
2. The combination with a reducing machine,
screen bars or other screening means may be
said machine comprising a. rotor mounted on a
used under certain circumstances and since in
horizontal axis and means mounted beneath the
rotor and defining therewith a reducing zone hav
such case a portion of the material will escape
from the working zone through the cage open
ings, it will be understood that conveyor 21 would
be run at a proportionately slower speed than
conveyor [2. With the machine set for syn
chronized feed and discharge,’ and since the speed
10 of the conveyors is independent of the speed of
the rotor, it will be evident that the nature of
the product may be varied without varying the
speed of the rotor. For example, a finer product
will be secured when the speed of the feed and
discharge is decreased relative to that of the
rotor.
ing upwardly faced feeding and discharge ends,
of an endless conveyor having runs overlying the
ends of saidzone and operative to effect feed
thereto and discharge therefrom.
3. The combination with a reducing machine,
said machine comprising a rotor mounted on a 10
horizontal axis and means mounted beneath the
rotor and de?ning therewith a reducing zone hav
ing upwardly faced feeding and discharge ends,
of endless conveyor runs overlying the ends of
said zone and operative to effect feed thereto and
discharge therefrom, the conveyor runs being the
superposed runs of a single draft device, the ma
terial resting on the top run for feed thereby and
According to the embodiment of the invention
shown in Figure 4, the feed and discharge mech
anisms are constituted by portions of a single‘ rising under the bottom run to be engaged and
endless conveyor 63. A head shaft 64 journaled discharged thereby.
in
65
at
68
69
the side walls of the frame has wheels as at
?xed thereto and engaging endless chains as
6B which pass over wheels as at 61 on a shaft
journaled in the frame and over foot wheels
on a shaft ‘I0 supported on a frame ‘H which
is swingable about shaft 68. The endless chains
carry material engaging ?ights 12 similar to those
described with reference to Figures 1 to 3. The
upper runs of the chains between shafts 64 and
68 are supported on a plate 63a which in turn is
supported on the shafts through brackets 64a and
68a, the latter being independent of the mount
ing means for frame ‘H on shaft 68. The rear
ward end of the conveyor is adjustable relative
to the discharge apron about shaft 68 and is se
curable in adjusted position by means of out
wardly projecting bolts on frame ‘ll extending
through slots as at 13 and provided with wing
nuts outwardly thereof. Guides as at ‘H ?xed
40 to the side wall of the casing support the ends
horizontal axis and means mounted beneath the
rotor and defining therewith a reducing zone hav
ing upwardly faced feeding and discharge ends,
of apparatus arranged to feed material to the
feeding end of said zone, and a conveyor having
a bottom run overlying the discharge end of said
zone to engage and remove material passed
through said zone, and means for regulating the 0
speed of said conveyor to synchronize its opera
tion with that of the feed apparatus.
5. The combination with a reducing machine,
said machine comprising a rotor mounted on a
horizontal axis and means mounted beneath the
rotor and defining therewith a reducing zone
having upwardly faced feeding and discharge
ends, of an endless conveyor arranged to support
and feed material to the feeding end of said zone,
of ?ights 12 on the lower run of the conveyor.
and a conveyor having a bottom run overlying 110
the discharge end of said zone to engage and re
Shaft 64 is driven through speed change mech
move material passed through said zone, and
anism such as has been described hereinbefore.
According to this embodiment of the invention,
synchronization of feed and discharge is secured
through adjustment of the feed and discharge
openings. In initiating operation of the ma
chine, the conveyor may be disconnected from its
drive and feed effected manually until the work
drive means for the conveyors including means
for varying the relative speeds of the conveyors.
6. The combination with a reducing machine,
said machine comprising a rotor mounted on a
horizontal axis and means mounted beneath the
rotor and de?ning therewith a ‘reducing zone
having upwardly faced feeding and discharge
ing zone is ?lled to the proper degree. Conveyor
63 is then set in motion, the forward portion of
ends, of an endless conveyor arranged to support
and feed material to the feeding end of said zone,
its upper run serving as a feed conveyor and the
rearward portion of its lower run serving as a
and a conveyor having a bottom run overlying
the discharge end of said zone to engage and re
move material passed through said zone, and
discharge conveyor.
Another method of initiating operation is to
open the feed gate and allow the conveyor to
carry in a greater amount of material to the
working zone than can be discharged by the con
veyor.
60
4. The combination with a reducing machine, '
said machine comprising a rotor mounted on a
.
It will be understood that the invention is
capable of embodiment in forms other than those
shown and described, and accordingly, I do not
limit myself except as in the following claims.
I claim:
1. The combination with a reducing machine
of the class described, said machine comprising a
casing with feed and discharge openings, of a
conveyor section arranged to effect material feed
through said feed opening, a conveyor section ar
ranged to effect discharge through said discharge
opening, said discharge conveyor section consti
tuting the top boundary of said discharge open
ing and being adjustable to vary the capacity of
said discharge opening, and means for retaining
said discharge mechanism in adjusted position.
drive means for the conveyors including change '
speed mechanism for each of the conveyors._
7. The combination with a reducing machine,
said machine comprising a rotor mounted on a
horizontal axis and means mounted beneath the 60
rotor and de?ning therewith a reducing zone
having upwardly faced feeding and discharge
ends, of an endless conveyor arranged to support
and feed material to the feeding end'of said zone,
and a conveyor having a bottom run overlying
the discharge end of said zone to engage and re
move material passed through said zone, and in
dependently operable drive means for the con
veyors.
8. The combination with a reducing machine,
said machine comprising a rotor and means
mounted adjacent the rotor and de?ning there
with a confined reducing zone having feeding and
discharge ends, of mechanism arranged to feed
material to the feeding end of said zone, a con— 75
4
2,086,522
veyor having a run adjacent the discharge end
of said zone, said conveyor being of such width
and said run being so disposed as to extend sub
stantially across said discharge end, the conveyor
being of a construction to prevent the passage
therethrough of reduced material,_said run‘ de
?ning a portion of a discharge opening and serv
ing to engage and discharge material out of said
zone, the arrangement beingsuch that material
10 is passed through said zone under the impelling
action of the rotor at a rate determined ‘by the
discharge action of said conveyor run, and means
for regulating the speed of said conveyor to syn
chronize its operation with that of the said mech
,
discharge material out of said zone, the arrange
ment being such that material is passed through
said zone under the impelling action of the rotor
at a rate determined by the discharge action of
said conveyor run, and drive means for the con
veyors including means for varying the relative
speeds of the conveyors.
I
7
10. The combination with a reducing machine,
said machine comprising a rotor and means
mounted adjacent the rotor and de?ning there 10
with a confined reducing zone having feeding and
discharge ends, of endless conveyor runs of which
one is disposed adjacent the feeding end of said
zone and is operative to e?ect feed thereto, an
other of said runs being adjacent the discharge
9. The combination with a reducing machine, end of said zone and being of such width and so
said machine comprising a rotor and means disposed as to extend substantially across said
mounted adjacent the rotor and de?ning there
discharge end, said other run being of a construc
with a con?ned reducing zone having feeding and tion to prevent the passage of reduced material
discharge ends, of an endless conveyor arranged therethrough and de?ning a portion of a dis 20
to support and feed material to the feeding end charge opening and serving to engage and dis
of said zone, a discharge conveyor having a run charge material out of said zone, the arrange
adjacent the discharge end of said zone, said dis
ment being such that material is passed through
charge conveyor being of such width and said run said zone under the impelling action of the ro
being so disposed as to extend substantially across tor at a rate determined by the discharge action 25
said discharge end, the conveyor being of a con
of said other run, the conveyor runs being the
struction to prevent the passage therethrough of opposite runs of atsingle endless draft device.
reduced material, said runs de?ning a portion of
a discharge opening and serving to engage and
WALTER J. ARMSTRONG.
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