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Dw 17, 1946-
. 'E. G. EPPENBACH ET AL
2,412,677
ADJUSTABLE MILL UNIT»
Filed March ‘1, 1944
2 Sheets-Sheet 1
/ ‘A 37.
ATTORNEY
De¢~ 17, 1946-
E. G. \EPPENBACH ETAL
2,412,677
ADJUSTABLE MILL UNIT
Filed March 1, 1944
v
71:12,.
2 Sheets-Sheet 2
‘
ATTORNEY
Patented Dec. 17, 1946
2,412,677
UNITED STATES PATENT OFFICE
2,412,677
ADJUSTABLE MILL UNIT
Edwin G. Eppenbach, Manhasset, and Henry
Imshaug, Flushing, N. Y.; said Imshaug as
signor to said Eppenbach
Application March 1, 1944, Serial No. 524,823
4 Claims. (Cl. 241-259)
This invention relates generally to mills of de
vices for grinding, milling and mixing of mate
2
not shown in the drawings. Within base | 0 there
is suspended a motive source H, such as an elec
rial, such as is used in the production of col_
tric motor, with a. vertical shaft I2 extending up
loidal compounds, and especially to the adjust
wards. The motor is suspended from the em
ment features of the mill units employed in such 6 closed bottom structure [3 of a frame M, which
devices.
latter rests upon base Ill. The center of frame
The present invention is a continuation in part
bottom #3 is apertured at I5, which aperture is
of our co-pending application Serial No. 437,979,
covered by a drip guard [6. Structure I3 and
?led July '7, 1942, for Vertical mill, and its major
drip guard I6 effectively prevent liquid or mois
object is to provide simple, effective and accu
ture from entering the base and damaging the
ra'tely operable means whereby the elements of
motor.
mill units may be precisely adjusted relative to
Secured to and supported by frame i4 is a
one another, and wherein are provided readily
combination journaling and adjusting member
visible means for calibrating such adjustment
l7, consisting of a hub structure IS, with which
and other means for locking the adjusting means 15 is associated a threaded adjustable cup l9, ac
in the desired position.
commodating a shaft bearing 20. Cup l9 may be
While the adjustment of mill elements rela
set in its adjusted position in respect to hub [8
tive to one another is nothing new in the art,
by set screws 2!. Within hub I8 is lodged and
this operation becomes exceedingly important in
guided a sleeve 22, which is threaded externally
devices where material of ?ne texture is to be 20 at 23 and is engaged by an internally threaded
prepared, and especially when material which is
and calibrated index ring 24, by means of which
to be’ processed is intended to be milled to a cer
ring sleeve 22 may be adjusted in upward or
tain ?neness in order to bring it to a state of
downward directions. Sleeve 22 may be held in
colloidal suspension within a liquid carrier.
its adjusted position by means of set screw 25 en
In such devices it becomes imperative that the 25 gaging ringv 24.
adjustment of the mill elements to be very accu
Within sleeve 22 and j'ournaled in bearings 20
rate, and that the amount of such adjustment
is rotor shaft 26. The latter is joined with shaft
becomes readily perceivable to the operator from
l2 of motor II by means of coupling 21, located
without the device so as to- facilitate accurate re
adjustments as may be required due to either
the desire to increase the ?neness of the prod
not, or to compensate for the wear of the mill
elements in the course of continuous operation
of the device.
The foregoing important objects and advan
tages will become more fully understood from
the following description, in connection with the
accompanying drawings, wherein:
Fig. 1 illustrates an elevation of a device em
ploying adjustable mill elements, shown partially
in section;
'
, Fig. 2 illustrates an enlarged partial detail view
of the grinding and milling mechanism;
Fig. 3 is a similar illustration‘ of a modi?ed
form of the grinding and milling arrangement;
Fig. 4 is an enlarged detail view in vertical cross
section of the mill unit and its adjusting means;
and
.
within frame l4. Secured to shaft 26 is rotor
28, forming a part of the grinder or mill unit
of the device. Rotor 28 is exchangeable. The
stator of the mill is indicated, at 29 and also com
prises an exchangeable member or insert, which
is supported by the broadened upper or ?anged
end 38 of sleeve 22, and which broadened end
forms the bottom of the mill casing, which houses
the grinder unit. It will be seen that the casing
is’ provided with a water jacket 3|, whereby the
casing, and therefore the grinder unit, may be
readily cooled or held at any desired tempera
ture required for the matter to be treated within
the device.
,
~
Above jacket 3| is a jacketed top member 32,
held together with ?ange 30 of sleeve 22 by means
of spacer bolts 33. Supported by upper jacket
structure 32 is a hopper 34, provided with a cover
35, which may be completely closed if so desired.
By means of the jacket in member 32 the con
Fig. 5 is a plan view of the adjusting nut
tents of the hopper may be kept at any desired
thereof.
50 temperature. The top of the hopper is provided
Referring now speci?cally to the drawings,
with an inlet 36 into which is removably placed
numeral 10 denotes the base of the device, which
the end of the goose neck 31 forming the upper
is preferably placed upon the floor, but which
portion of conduit 38, joined at its lower end with
may be swung to any desired position and se
outlet pipe 39. v The latter is connected at 40 with
cured in that position by bolts or other means 55 the grinder unit, and its discharge is controlled
2,412,677
3
4
the ring hub are also machined, and the height
of the hub substantially corresponds to the dis
tance between the machined surfaces in body 5|,
which surfaces form end abutments for the ring
hub. Thus the ring is operatively held between
these end abutments and can not move axially,
whereby its movement is restricted to a purely
by valve 4|. This valve may be so placed that
it either provides a direct discharge from the
grinder unit through its hollow structure 42, or
that it closes outlet pipe 39 to provide circula
tion of the matter being milled through pipe 38
to the top of hopper 34 and back ino the grinder.
Referring now to Figs. 2 and 3, these detail
?gures illustrate'two forms of the grinding unit.
In Fig. 2 shaft 26 is provided with a reduced por
rotary motion.
The ring hub is provided with an internal
thread 62 which engages external thread 23 of
tion 43, and a threaded end 44, with which two 19 sleeve 22. Extending from the ring hub is a
portions one-piece rotor 28 is associated. Stator
web which supports an annular enlargement
29 comprises also a one-piece structure and is‘
wherein a plurality of radial recesses 63 are pro
supported by the upper ?anged end 30. of ad
vided ‘to facilitate turning and adjustment of the
justable sleeve 22.
'
'
'
'
ring in respect to casing 5|, which latter has a
Fig. 3 illustrates a somewhat modi?ed form of
spare-out 54 in its otherwise closed, hollow body
the mill elements. In that ?gure shaft 26_ is again
to provide access to recesses 63 and to allow rota
reduced at 43, but is provided with a much longer
tion of the ring through a short arc.
threaded end 44’, by means of which a multiple
The upper portion of the annular ring en
piece rotor is secured to the shaft. In this con
largement
is beveled, and upon that beveled por
20
struction the rotor comprises a supporting mem
tion there is provideda calibrated strip 65. Se
ber-45,21. cover member 46 and an exchangeable
cured to the upper ledge of spare-out '64 is an
insert-.41, which may be in the form of an abra
indicator 55 pointed toward the calibration on
sive ring. The latter is clamped between mem
strip 65. At the top portion of the ring annulus
bars 45 and 46. The stator of this modi?ed form
is' also‘ provided with an exchangeable abrasive 25 there is provided a, plurality of recesses 61, seen
clearly in Fig. 5, and serving for the reception
element 48', lodged within the inverted dish-struc
of the reduced lower end of set or lock screw
25, operatively mounted in the upper ledge or
ture 49.
Attention, is now invited to Figs. 4 and 5, and
especially to the arrangement including the mill
unit and its adjusting means.
It will ‘be ob
30
served that frame l4, within which the shaft
coupling‘ 2'! operates, ‘serves as support for the
entire upper structure of the mill devicefover
Frame l4 also
‘which is mounted hopper 34.
serves forattaching that structure, such as by
bpltsj5d.’
'
"
'
‘
'
cesses 5'! of the nut holds the latter against move
ment._
When it becomes evident from the product leav
The combination journaling and adjusting
ing the- mill, or for any other reason, that a re
40
whichulatteris externally threaded. These jour
guide sleeve 22. It will be noted that 'up'per hub
5; is provided with an opening 54 in registry with
of adjustment may be usually determinedv for
openingiiS, provided in'guide sleeve 22, in order
to" facilitate thelubrication of’ shaft’26 within
different types of ‘work before the device is, put
into use, whereby the necessity, of employing
skilled ‘manipulators is effectively overcome. It
the guidesleeve. '
Theelower threaded end of hub 53. is engaged
50
marily designed for adjusting the stationary ele
ment of the mill‘, unit in respect to the rotor, the
'
latter is rendered, adjustable also. Bearing cup
H3 in thread engagement with lower journaling
Thu thrustrbearinlgh 20.; supports shaft 26, while
in guide sleeve 22 bearings 51 and 58_are provided
hub 53 accommodatesthrust bearingZil of rotor
to correctly ‘journal shaft“ and its rotor in re
shaftZiS. By unscrewing or tightening cup H! in
respect to hub 53, the shaft may be lowered ‘or
spectto the stator. Stator 29 is held in its cor
rect'position by means of an inlay 59, secured
by means'of bolt 60' passing through ?‘ange‘3il
of gruidersleeve 22. This insert not only’ holds
stator 29 in position, but also provides a seal
betweenxthe rotor- and the stator, so that the ma
terial milled by the unit is discharged into, an
is merely necessary to give directions to what
setting nut 24 is to be, advanced after stated op
erating periods of the mill.
'
While the above described arrangement is pri
toiprevent the escape of lubricant passed through
passage‘ 55", into guide sleeve 22.
adjustmentjof the mill unit, is required, such
new adjustment'may be easily and accurately
made by simply elevatingv lock screws 25 above
the'nut and: turning the latter to a desired mark
of the calibration, whereupon screw 25, is again
lowered into one of the ‘recesses 61. The amount
naling hubs serve asv supports and journals for
by“ the internally threaded portion of adjust
able bearing cup» l8, in which'is lodged thrust
V
bearing.
Him‘. shaft 25‘. In the lower erid of cup
|_,, there is provided ‘at 55‘. a packing‘ring adapted
latter may be turned with relative ease, whereby
an exact adjustment of the stator in respect to
the rotor is facilitated. Indicator 66 denotes such
adjustment on the scale or calibration 65, and
‘ lock screw 25 screwed down into one of the re
'
means l‘l include a hollow body 5| ,' thebase I8
ofjwhieh is secured by the aforesaid bolt 5|] to
frame I4, Extending from body 5| are upper
journaling hub 52 and lower journali'ng hub 53,
cover portion of journaling body 5|.
By means of radial recesses’ 63 of the nut, the
raised.
One or more set screws 2| provided in
cup I9 will. keepthe latter in the desired ad
justed position.
'
‘
'
Although we‘ have shown and described cer
65
tain'speci?c constructions of ‘our vadjusting means
whereby the stator may be positioned ‘at‘th‘e
for the'mill elements, it is obvious that changes
and improvements may be incorporated‘therein,
without departing from the broad scope of our
invention, as defined in‘the annexed claims.
lelly machined surfaces between which, operates
said jrnill structure ‘including combination jour
annular space‘indicated at“ 6|, from which it
passesinto conduit 39.
‘
'
The adjusting means for guide sleeve 22,
claim:
desired distance from the rotor, are located with 70 We
1. In av colloidal mill device, a frame, a motive
in. thehollow portion of enlarged body 5| se
source suspended from the frame, a mill structure
curedrtoeframe l4. The internal structure of
supported by and removably secured to the frame,
body 5| provides‘two oppositely disposed paral;
nali'rig and" adjusting means, said journaling
the hub of ring or nut' 24‘fThe outer faces of 75
2,412,677
5
6
means forming a hollow body, serving for at
tachment of the mill structure to the frame, with
upper and lower guide hubs extending from the
hollow body, a bearing cup adjustably associated
with the lower guide hub and accommodating a
thrust bearing, a mill shaft ‘operative by said
3. In a mechanism for adjusting elements of
mill units in colloidal mill devices and the like,
an adjustable guide sleeve for journaling the _
shaft of the movable element of the mill unit,
said guide sleeve serving as support of the sta
tionary element of the mill unit, and means re
stricted to a purely rotary movement by ?xed
abutments, and being in operative engagement _
motive source journaled in said bearing, a guide
sleeve for the shaft slidably mounted in said
guide hubs; said adjusting means being operative
with said sleeve for adjusting the latter, and thus
the stationary element, relative to the movable
element, and means for setting said adjusting
within the hollow body of said journaling means
and engaging said sleeve for adjusting the latter,
a mill rotor associated with said mill shaft, said
means, and other means for arresting said ad
justing means in the set position.
4. In a colloidal mill device having an adjust
rotor being rendered adjustable in respect to said
guide sleeve by way of said mill shaft through
the adjustable bearing cup, a mill stator sup
ported by said guide sleeve and being adjustable
15
able mill unit, a centrally apertured ?xed support
for the mill unit including an annular hollow,
substantially closed body enlargement, a sleeve
adjustably mounted in the apertured portion of
the support and provided with a ?ange to which
in respect to the mill rotor by way of the guide
sleeve through said adjusting means in opera
tive engagement with said guide sleeve, and means
for arresting the movement of said adjusting 20 the mill stator is attached, a rotor shaft oper
means in the adjusted position.
ative in said sleeve and being adjustable both in
2. In a colloidal mill device, as set forth in
respect to said sleeve and to said support, means
claim 1, said calibrated adjusting means com
operative within said body enlargement for ad
prising an internally threaded member operative
justing the sleeve, and thus the stator, in respect
between end abutments, thus restricting its oper
to the support and the rotor, means in said en
ation to a rotary movement only, its internal
largement for restricting the movement of said
thread engaging the externally threaded portion
adjusting means to a rotary operation only, and
of said stator support, means provided with said
other meansoperative from without said enlarge
member for facilitating its rotary operation, and
ment for preventing the movement of said ad
a calibration arranged peripherally on said mem
ber for setting it. said arresting means compris
ing recesses in said member engageable by a lock
screw to hold the member in its set position.
30 justing means.
EDWIN G‘. EPPENBACH.
HENRY IMSHAUG.
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