IMPROVEMENTS IN REDUCTION " MACHINES FOR MANUFACTURING..FLOUR
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I JOHN MURRAY CASE of 28 East First Avenue Columbus in the County of
Franklin and State of Ohio United States of America Flouring Mill Builder do
hereby declare the nature of said Invention for IMPROVEMENTS IN REDUCTION
"
MACHINES FOR MANUFACTURING..FLOUR." to be as follows:-
The Invention relates to machines employed for the reduction of grain to
flour and has for its objects the simplification of the construction of such mills, a
reduction in the cost of manufacturing the same and the economization of room in
the mill.
To these ends the Invention consists of a pair of rolls which are driven by
suitable belts or gearing and work against the opposite faces of a grinding plate
interposed between said rolls and extending above and below the horizontal plane
of their axes-The interposed grinding plate is provided with means for adjusting
it vertically and also with means for locking it securely in any position in which it
may be set thereby rendering the whole of its surface available for grinding
purposes: The grinding plate is preferably constructed of an inner frame to which
aro removably secured, face plates, which may both be smooth, or both corrugated,
or one smooth and one corrugated, according to the character of the break it is
desired to make. In order to take up the jar produced by the rolls working
against the said grinding plate and prevent noise as much as possible rubber or
other elastic packings are interposed between the face plates and main frame. The
rolls are held in position for grinding with a yielding pressure and provided with
means for adjusting their distance asunder, levelling them and throwing them out
of grinding position, as hereinafter described. Their journal boxes are formed on
the upper ends of downwardly projecting arms or supports which are circular at
their lower extremities and rest in a concave block which is moved or adjusted up
or down by a screw having its bearings in a lug projecting from the side of the case.
The rolls may thereby be adjusted vertically or levelled and locked in place by a
locking bolt passed through an arm on the concave block above referred to and
through a slot in the case. The circular ends of the supporting arms and their
complementary seats permit the rocking of said arms when the rolls are moved
towards or from each other. The rolls are held in grinding position with a yielding
pressure by springs each of which is confined at one end to the upper end of the
rocking arm and at the other to a follower block operated by a screw having
its bearings in a lug on the case. The pressure of the springs may therefore be
Prine S1
"

page_text: regulated by the screw follower. The rolls are held at the proper distance from the
grinding plate and prevented from clashing by a link fixed at one end to the journal
box and bearing at the other end against the case through the medium of an
adjustable follower block and an eccentric lug projecting from the end of a shaft
which is held to the said case by suitable boxes.-The follower block works in an
opening in the outer end of the link and bears at its side nearest the roll against
the eccentric end of the shaft above referred to. It is operated upon by a hand
screw having bearings in the end of the link which screw, when driven in draws
the said link and consequently the roll outward by means of its fixed bearings on
the case through the medium of the follower block and shaft above referred to.
The rolls may be thus set at the proper distance from the grinding plate and
prevented from approaching or clashing therewith without further attention on the
part of the miller. Hence, should any hard substance be fed in with the stock, the
springs will permit the rolls to separate to let such substance pass and restore them
immediately to the precise position in which they were before the separation-It
sometimes becomes necessary to throw the rolls wide apart, in the event of the
falling down of a quantity of stock in excess of their capacity, in order to permit
the superfluous material to pass; otherwise the rolls would become clogged and the
belts slip. This is accomplished by the transverse shaft and the eccentric lug pro-
jecting from the end thereof on the side nearest the rolls so that when said shaft is
Lurned, by a handle provided for the purpose, the eccentric lug will impinge against
the follower block above referred to and thereby draw the link (and consequently
the roll) outward.
ոու
CA1 100A

page_text: COMPLETE SPECIFICATION.
I JOHN MURRAY CASE of N° 28 East First Avenue Columbus in the County
of Franklin and State of Ohio United States of America Flouring Mill Builder do
hereby declare the nature of my invention for "IMPROVEMENTS IN REDUCTION
MACHINES FOR MANUFACTURING FLOUR' and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
"
The Invention relates to that class of machines employed for the reduction of
Grain to flour in which a mill having the grinding capacity of a four roller mill is
constructed of two grinding rolls and a stationary member interposed between their
adjacent faces and has for its objects the simplication of the construction of such
mills a reduction in the cost of manufacturing the same and the economization of
room in the mill.
To these ends the Invention consists of a pair of rolls which are driven by
suitable belts or gearing and working against the opposite faces of a grinding plate
interposed between the said rolls and extending above and below the horizontal
plane of their axes. The interposed grinding plate is provided with means for
adjusting it vertically and also with means for locking it securely in any position
in which it may be set thereby rendering the whole of its surface available for
guiding purposes. The grinding plate is preferably constructed of an inner frame
to which are removably secured, face plates, which may both be smooth, or both
corrugated, or one smooth and one corrugated, according to the character of the
break it is desired to make. In order to take up the jar produced by the rolls
working against said grinding plates and prevent noise as much as possible, rubber
or other elastic packings are interposed between the face plates and main frame.
The rolls are held in grinding position with a yielding pressure and provided with
means for adjusting their distance asunder, levelling them; and throwing them out
of grinding position, as hereinafter described. Their journal boxes are forined on
the upper ends of downwardly projecting arms or supports, which are circular at
their lower extremities and rest in a concave block which is moved or adjusted up
or down by a screw having its bearings in a lug projecting from the side of the
case. The rolls may thereby be adjusted vertically, or levelled, and locked in place
by a locking bolt passed through an arm on the concave block above referred to,
and through a slot in the case. The circular ends of the supporting arms and their
complementary seats permit the rocking of said arms when the rollers are moved
towards or from each other. The rolls are held in grinding position with a yielding
pressure by springs each of which is confined at one end to the upper end of
a rocking arm and at the other to a follower-block operated by a screw having
its bearings in a lug on the case. The pressure of the springs may therefore be

page_text: regulated by the screw follower. The rolls are held at the proper distance from the
grinding plate and prevented from clashing, by a link fixed at one end to the
journal box, and bearing at the other end against the case through the medium of
an adjustable follower-block and an eccentric lug projecting from the end of a shaft
which is held to said case by suitable boxes. The follower-block works in an
opening in the outer end of the link and bears at its side nearest the roll against
the eccentric end of the shaft above referred to. It is operated upon by a hand
screw having bearings in the end of the link, which screw, when driven in, draws
said link, and consequently the roll outward, by reason' of its fixed bearing on the
case, through the medium of the follower-block and shaft above referred to. The
rolls may be thus set at the proper distance from the grinding plate and prevented
from approaching or clashing therewith without further attention on the part of the
miller. Hence, should any hard substance be fed in with the stock, the springs
will permit the rolls to separate, to let such substance pass and restore them
immediately to the precise position in which they were before the separation. It
sometimes becomes necessary to throw the rolls wide apart, in the event of the
falling down of a quantity of stock in excess of their capacity, in order to permit
the superfluous material to pass; otherwise the rolls would become clogged and the
belts slip. This is accomplished by the transverse shaft and the eccentric lug
projecting from the end thereof on the side nearest the rolls, so that when said
shaft is turned, by a handle provided for the purpose, the eccentric lug will impinge
against the follower block above referred to and thereby draw the link, and
consequently the roll outward.
In order that my Invention may be fully understood I will proceed to describe
it with reference to the accompanying drawings in which :-
Figure 1 is a vertical transverse section on the line 1-1 Figures 2 and 3
illustrating the use of an interposed grinding plate.
Figure 2 is a horizontul section of the same on the line 2.2 Figures 1 and 3.
Figure 3 is a vertical longitudinal section on the line 3-3, figures 1 and 2.
Figure 4 is a perspective view of the interposed grinding-plate removed.
Figure 5 is a horizontal section of the mechanism for regulating the distance
asunder of the rolls.
Figure 6 is a vertical sectional elovation of the mechanism for levelling tho rolls
and adjusting their distance asunder.
Figure 7 is a vertical section on the line 7-7 Figure 6.
Figure 8 is a perspective view of the lower section of the journal box for the
moveable roll and its supporting arm, in its preferred form.
. 1 and 2 represent revolving grinding rolls, corrugated with teeth of the same
or different sizes and mounted in adjustable bearings such as hereinafter described,
adapted to crush the grain against the respective faces of a grinding plate 3
interposed between them and extending above and below the horizontal plane of
their axes.
The interposed plate 3 is preferably differentially dressed as above described and
provided with means for adjusting it, whereby its entire surface is made available
for grinding purposes.
The plate is made adjustable vertically by means of a screw 5 resting by a
collar near its upper end, on the boss on the top of the frame, and provided at the
top with a hand wheel or a key square for turning it. Clamp bolts 6-6 passing
through holes in lugs 11 formed on the frame 10, and through vertical slots in the
casing 1, and receiving nuts on their outer ends, fix the plate in any position in
which it may be set.
This interposed grinding plate is preferably constructed of surface plates 4, 4a
removably secured by bolts 9 to a central frame or back 10 in which the adjusting
screw 5 is threaded and in which are formed the lugs 11 for receiving the clamp-
bolts 6. Between the surface plates 4 and 4u and the central frame or back 10
:

page_text: are interposed cushions or packings 12 of rubber or like yielding material for tho
purpose of taking up jar from the rolls and preventing noise. It is obvious
however, that this interposed grinding plate, may be made solid without departing
from my invention.
1
..
By the employment of two adjustable grinding rolls crushing against the opposite
faces of a stationary grinding plate interposed between them, and extending for a
suitable distance above and below them, I am enabled to effect two successive
breaks or reductions of the material, the said interposed plate serving as a partition
for dividing the machine into two separate and independent compartments. The use
of the interposed plate therefore is made to do the work of an additional pair of rolls
and the cost of making it is materially less. Another important advantage is, that
by the use of such interposed plate a machine of the capacity of a four-roller-mill
may, be made, occupying a little more than one-half the space..
•
It is found advantageous to employ a smooth surface for the first break roll to
work against, and a corrugated surface for the second break roll.
The feed-hoppers 13 may be of any suitablo construction and may be provided
with customary regulating slides 14. If preferred, I may employ a vibrating feed-
box such as I have described in my application of even date herewith.
15. 15 represent doors for inspecting the feed and 16. 16 doors for inspecting the
material delivered from the respective rolls.
The mechanism for levelling the rolls and adjusting their distance asunder, is
shewn in figure 6 of the drawing applied to a four-roller-mill, but it is obvious that
it is immaterial whether the outer roll is adjusted relatively to a second roll or to a
stationary plate.
1 represents the moveable and 2 the stationary or non-adjustable roll, which
former roll has its bearings in the upper ends of rocking arms 17, which work near
their upper ends, within grooves formed in the flanges of the case, and fit at their
lower extremities in concave seats in follower-blocks 18. The blocks 18 are
adjusted vertically as may be necessary to level the rolls, by screws 19. having
bearings in lugs 19" projecting outward from the case. . The screws 19 are provided
at their lower extremities with angular heads for the reception of a wrench for
turning them. The follower-blocks are of L shape, and each one receives a bolt, 20,
which works within a slot in the case and receives on the inside thereof a nut,
whereby said lock may be securely locked in any position in which it may be set,
thereby affording greater security against displacement of the rolls. The head or
upper portion of each of the arms 17 in which the journal bearings is formed may
be of any suitable construction but is preferably constructed as represented in
figure 8, with a pair of downwardly projecting check-pieces 21 between which is
received the end of a link 22 held by a pin or any other suitable means. One of
these links is employed at each end of each moveable roll. It is formed near its
outer extremity with an opening 23 within which works a follower block 24 which
is operated by a hand screw 25. The follower block 24 bears against an excentric
26 on the end of a shaft 27 which extends from side to side of the machine and is
held to the casing thereof by suitable boxes 28. It will be seen that the shaft 27
constitutes a bearing for the screw 25 through the interposed follower block 24, and
that therefore when the screw 25 is driven into the end of the link 22, the roll 1
will be drawn away from the roll 2. These rolls may thereby be set at the desired
distance asunder and are held in that position with a yielding pressure by
a spring 29 which bears at one end in a socket or is otherwise held in contact with
the journal box. The other end of the spring is secured to a follower block 30
which is operated by a screw 31 having its bearings in a lug 32 on the case.
These springs.are designed to hold the rolls together with a pressure sufficient to
effect the reduction of the material, while permitting them to separate in the event
of the falling of any hard substance between them. The pressure may be regulated
at will by the screw followers 30, 31,

page_text: It is often necessary in practice, whenever too great quantities of material drop
down between the rolls, to throw them apart to allow the surplus material to pass
through, otherwise it would clog the rolls and cause the belts to slip. For effecting
this separation of the rolls I employ a lever 33 secured to the shaft 27 which lever
when depressed will cause the eccentric end 26, acting through the follower 24,
screw 25, and link 22, to draw the roll 1 away from the roll 2. When it is returned
to its normal position the rolls will be returned to the precise position in which
they were before such separation by the spring 29.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that
what I claim is
First. In a reduction machine, the combination with a pair of rolls of a stationary
grinding-plate interposed between them, and extending above and below the
horizontal plane of their axes substantially in the manner and for the purpose set
forth.
Second. In a reduction machine, the combination with a pair of rolls, of
a stationary grinding plate interposed between them, substantially in the manner
set forth and means for adjusting said stationary plate so as to present different
portions of its surface for action as described.
Third. In a gradual reduction machine, the combination of the casing, a pair of
hopper spouts, a pair of grinding rolls, an interposed grinding plate, and a pair of
delivery spouts, all constructed and arranged substantially as herein shown and
described.
Fourth. In a grain-breaker or reducing machine, the combination of a pair of
grinding rolls and a stationary grinding-plate having parallel faces interposed
between said rolls, and extending above and below the horizontal plane of their
axes.
Fifth. In a grain-breaking or reducing-machine, the combination of a pair of
rolls, and a grinding plate interposed between the adjacent faces of said rolls, and
extending above and below the horizontal plane of their axes, of means for
adjusting said plate vertically as set forth.
Sixth. In a grain breaking or reducing machine, the combination with a pair of
rolls, a grinding plate interposed between said rolls and extending above and
below the horizontal plane of their axes, and means for adjusting said plane
vertically, of means for locking it in any position in which it may be set, as
described.
Seventh. In a grain breaking or reducing machine, the combination with a pair
of grinding rolls and stationary grinding plate interposed between the adjacent
faces of said rolls, and extending above and below the horizontal plan of their axes,
of means for adjusting the distance asunder of the rolls.
Eighth. In a reduction machine, the combination with two rolls, of a grinding
plate for uso between them, constructed of a central frame and removable face or
grinding plates, as set forth.
Ninth. In a reduction machine the combination with two rolls of a grinding
plate for use between them constructed of a central frame, removable face or
grinding plates and suitable clastic packing interposed between said plates and
frame, as set forth.
Tenth. In a levelling device for roller mills, the combination with arm 17,
journal-box, and the casing having lug 19, and a guiding-slot in its flange, of
block 18, clamp bolt 20, and adjusting screw 19 bearing in. said lug, as and for the
purpose set forth.
Eleventh. In a roller mill, the links 22, hand screws 25, followers 24, shaft 27.
provided with eccentric ends 26 and lever 33, in combination with suitable means
for holding the rolls in grinding position with a yielding pressure, as and for the
purpose set forth..

page_text: Twelfth. The combination with links 22, adjustable followers 24, and shaft 27,
provided with eccentric ends 26 of the adjustable springs 29, as and for the purpose
set forth.
Dated this twelfth day of December One thousand eight hundred and eighty