IMPROVEMENTS IN APPARATUS 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 APPARATUS
FOR MANUFACTURING FLOUR."
The Invention has for its object the perfection of a complete system of apparatus
whereby the successive stages of the reduction are effected the material being
carried from one stage to another automatically, thereby effecting a great saving
in manual labor.
.
In the construction of the casing or frame duplicated plates or castings are
employed for forming the opposito walls of the said casing or frame, the sides
of the said casing or frame being formed of two plates or castings which are
absolute duplicates of each other and the lower portion of the ends being formed of
two plates or castings which are also duplicates of each other; said end plates
being formed with marginal flanges to adapt them to be bolted to the margins of
the side plates. The upper portion of the ends of the frame are formed of duplicated
rectangular castings constituting door frames which are provided with cavities for
the reception of gudgeons cast on the lower corners of the doors. These three
castings duplicated as described, thus form the lower part or body of the frames.
The side plates above referred to are cast on their upper edges with a marginal
flange within which are formed the bearings or lower sections of the journal boxes
for the two inside or stationary rolls and the eccentric shaft employed for imparting
motion to the feed box, as hereinafter described.
The upper part or cap of the frame is constructed of duplicated side plates,
duplicated end plates (or boards) a top plate (or board) to which the side plates are
secured by screws, and two doors. The lower margins of the side plates of the cap
are formed complementary to those of the upper margins of the side plates of the
main frame so that they fit snugly over the same and form, when in place, the
upper sections of the journal boxes above referred to.
The feeding is effected by an arrangement consisting of a vibrating box suspended
by flexible hangers above the rolls, said box being adapted to supply the rolls with
an equal and uniform quantity of material from end to end, as hereinafter described.
The box is suspended over the rolls by flexible hangers and is moved or, vibrated
in one direction by an eccentric abutting against it or a projection therefrom, the
IP 1071

page_text: said movement being resisted (and the return movement produced) by a suitable
spring.
The eccentric is formed on a shaft which is passed through the frame of the
machine and has its bearings therein as above described. The shaft is provided at
one end with a pulley and receives a belt which is driven from a pulley on the end
of one of the roll shafts. The box may, if desired, be divided centrally and be used
in combination with two hopper spouts and two sets of rolls for feeding a different
class of material to each pair of rolls. It is provided with shallow end bridges
over which the material sifts, the said bridges being provided with means for
adjustment.
The elevation and purification of the material is effected by means of one or a
series of elevating tubes of small area leading from the reduction machine or
machines to a settling chamber or chambers, or bolt hoppers, of much larger area
from which settling chamber or chambers the air and dust are exhausted through
a pipe of an area larger than that of the elevating pipes, the said exhaust pipe being
connected with a suitable fan; and also with a dust collector, if desired. The
tailings from the bolts above referred to are carried to any desired part of the mill
or returned by gravity through suitable troughs to the next reducing rolls for
further reduction and again elevated to be bolted, these operations being repeated
until the tailings are entirely disposed of, one way or another. The material which
passes through the bolts is conducted to one common pipe or conveyor spout, or
the material from each bolt to a separate spout, whence it is taken by a second
tube of small area emptying into a second settling chamber or bolt hopper of larger
area, from which the air and dust are exhausted by a second pipe of larger area
connecting with a fan and dust catcher. All of the exhaust pipes of the mill
preferably connect with one common air trunk from which the air is exhausted
by one fan of suitable size and capacity.
In the bolt hoppers or settling chambers employed in this system each settling
chamber is provided with a valve for regulating the strength of the current of air
passing therethrough. The bottom of each settling chamber is also provided with
an automatic valve which is adapted to open under a superincumbent weight of
material thereon and allow a portion of the said material to fall through and into
the bolting reel while preventing the admission of air upwards into the chamber.
By this arrangement the dust is carried off from the material while in the settling
chamber and before it reaches the bolt, thereby greatly reducing the necessity of
brushing said bolt to free the dust therefrom.

page_text: I JOHN MURRAY CASE of No 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 APPARATUS 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 has for its object the perfection of a complete system of apparatus,
whereby the successive stages of the reduction are effected, the material being
carried from one stage to another automatically, thereby effecting a great saving in
manual labor.
The first part of my invention relates to the construction of the casing or frame
and consists in the employment of duplicated plates or castings for forming the
opposite walls of the said casing. The sides of the frame or casing are formed of
two plates or castings which are absolute duplicates of each other, and the lower
portion of the ends formed of two plates or castings which are also duplicates of
each other, said end plates being formed with marginal flanges to adapt them to be
bolted to the margins of the side plates. The upper portion of the ends of the
frame are formed of duplicated rectangular castings constituting door frames which
are provided with cavities for the reception of gudgeons cast on the lower corners
of the door. These three castings duplicated as described, thus form the lower
part or body of the frame. The side plates above referred to are cast on their
upper edges with a marginal flange within which are formed the bearings or lower
sections of the journal boxes for the two inside non-adjustable rolls and the
eccentric shaft employed for imparting motion to the feed box, as hereinafter
described.
The upper part or cap of the frame is constructed of duplicated side plates,
duplicated end plates, (or boards) a top plate (or board) to which the side plates aro
secured by screws, and two doors. The lower margins of the side plates of the cap
are formed complementary to those of the upper margins of the side plates of the
main frame, so that they fit snugly over the same and form, when in place, the
upper sections of the journal boxes above referred to.
The second part of the Invention relates to feed boxes for roller mills and
consists of a vibrating box suspended by flexible hangers above the rolls, said box
being adapted to supply the rolls with an equal and uniform quantity of material
from end to end, as hereinafter described. The box is suspended over the rolls by
flexible hangers and is moved or vibrated in one direction by an eccentric abutting
against it or a projection therefrom, said movement being resisted and the return
movement produced by a suitable spring.
The eccentric is formed on a shaft which is passed through the frame of the
machine and has its bearings therein. This shaft is provided at one end with a
pulley and receives a belt which is driven from a pulley on the end of one of the
roll shafts. The box may if desired, be divided centrally and used in combination
with two hopper spouts and two sets of rolls for feeding a different class of material
to each pair of rolls,

page_text: It is provided with shallow end bridges over which the material sifts, said bridges
being provided with means for adjustment.
The third part of the Invention relates to the elevation and purification of the
material and consists of one, or a series of elevating tubes of small area leading
from the reduction machine or machines, to a settling chamber or chambers, or bolt
hoppers, of much larger area from which settling chamber or chambers the air and
dust are exhausted through a pipe of an area larger than that of the elevating pipes,
said exhaust pipe being connected with a suitable fan and also a dust collector, if
desired. The tailings from the bolts above referred to are carried to any desired
part of the mill or returned by gravity through suitable troughs to the next
reducing rolls for further reduction and again elevated to be bolted, these operations
being repeated until the tailings are entirely disposed of, one way or another. The
material which passes through the bolts is conducted to one common pipe or conveyor
spout, or the material from each bolt to a separate spout, whence it is taken by a
second tube of small area emptying into a second settling chamber or bolt hopper
of larger area, from which the air and dust are exhausted by a second pipe of larger
aren connecting with a fan and dust catcher. All of the exhaust pipes of the mill
preferably connect with one common air trunk from which the air is exhausted by
one fan of suitable size and capacity.
The fourth part of the invention relates to the bolt hoppers or settling chambers
employed in this system and consists in providing each settling chamber with a
valve for regulating the strength of the current of air passing therethrough.
The bottom of each settling chamber is also provided with an automatic valve
which is adapted to open under a superincumbent weight of material thereon and
allow a portion of said material to fall through and into the bolting reel while
preventing the admission of air upwards into the chamber. By this arrangement
the dust is carried off from the material while in the settling chamber and before it
reaches the bolt, thereby greatly reducing the necessity of brushing said bolt to
free the dust therefrom.
In order that my Invention may be more fully understood I will proceed to
describe it with reference to the accompanying drawings in which
Figure 1. is a perspective view of one of the plates which is duplicated to form
the sides of the lower part of the frame.
Figure 2. is an elevation of one of the plates which is duplicated to form the
cap or sides of the cover of the frame.
Figure 3. is a perspective view of one of the plates which is duplicated to form
the ends of the lower part of the frame.
Figure 4 is a perspective view of one of the door frames which surmounts the end
piece illustrated in figure 3. said frame being duplicated for the respective ends of
the machine.
Figure 5 is a perspective view of one of the doors.
Figure 6 is a perspective view of the main frame or casing bolted together in
readiness for the reception of the roll bearings and rolls, the doors of said casing
being shown open.
Figure 7 is a perspective view of the cap or cover in its complete condition
showing one of the doors thereof open.
Figure 8 is a vertical section of a four-roller mill with my improved feed box
applied the section being taken at right angles to the rolls.
Figure 9 is a perspective view of the box removed.
Figure 10 is a perspective view of hopper for receiving the material as it falls
from the rolls and a portion of the spouts for conveying it to the bolts.
Figure 11 is a perspective view of the lower section of one of the journal boxes
for the movable roll.
Figure 12 is a longitudinal section of the link for operating the same.
Figure 13 is a vertical section of a mill showing my completo system of apparatus
for grinding elevating purifying bolting etcetera.

page_text: Figure 14 is also a vertical section of the same, the cutting line being at right
angles to that of figure 13.
Figure 15 is a vertical section, on a much larger scale, of one of the rotary bolts
and its settling chamber or hopper.
-
Figure 16 is a vertical section of the same on the line 16-16 figure 15.
Figure 17. is a modification of the invention in which separate double conveyors
are used under each bolt of the series, instead of a single conveyor common to all,
as represented in Figures 15 and 16.
The side plates of the frame are shewn at I. They are each formed of a casting
such as represented in Figure 1 with a series of bolt holes adapting them to be
bolted to the flange 3 of the end plates 2 which end plates are cast in the form
shown in figure 3, adapted for use at either end of the machine.
Corresponding bolt holes are shown at 4 in the side plates and at 5 in the
flanges of the end plates 2 for the reception of the bolts 6 (figure 6) by which
these parts are secured together.
The upper end pieces or door frames 7 of the main frame or casing, the form of
which is represented in figure 4, are provided with flanges 8 pierced with holes 9
which register with corresponding holes 10 at the upper part of the frame 1. so
that these parts may be secured together by bolts as shown at 11 in figure 6.
The frames 7 are provided with hinge bearings 12, for the reception of gudgeons 13
cast on the corners of the door as shown in figures 5 and 6. These doors may, as
shown, be variously constructed as to details in their form and that of their hinges,
but are in each case adapted to be made of a single casting to be dropped into
place without the use of bolts or moveable pintles, and to readily open and shut
to give the miller access to the interior and thus enable him to inspect the work
of the mill.
The cap or cover of the mill is formed of two side castings 15, Figures 2 and 7,
which are duplicates of each other and are formed with marginal flanges pierced
with bolt holes 16 (figure 2) for the reception of bolts or screws 17 (Figure 7) by
which they are fastened to the top plate 18 and duplicate end plates 19 of the
cover. The cover is further provided with doors 20 to enable the inspection of
the feed and with a hopper 21. The lower edges of the plate 15 are cast with
caps or housings to cover the journals of the roll.
The summit of the casting 1 is formed with a flange in which the lower sections
of bearings for the two inside rolls, and of the shaft which agitates the feed box,
are formed, as represented, at 23., 23 and 22 respectively. The flange extends to
each side of the machine and is provided with openings 28 through which the
standards or supports for the adjustable bearings shown in figure 11 of the outer
rolls pass as shewn and described in a contemporaneous application. Cavities 24
are formed on the upper margin of the side plate 1 to accommodate the journals of
the movable rolls.
Among the advantages gained by the use of a frame constructed as above set
forth are the following. It makes a much more solid base of bearing for their rolls
than if they were supported in boxes bolted to a frame of ordinary construction.
It is much stronger than if the journal boxes were bolted or rivetted to the
frame, the necessity for boring holes for the purpose being avoided.
It is much cheaper than where the journal boxes are formed separately and
bolted on; and
It saves a great amount of labor, it simply being necessary after casting, to babbit
the journal bearings.
:
27 are lugs cast on the side plates of the machine for affording a bearing for the
means for supporting and adjusting the adjustable roll as more fully described in
my application just referred to.
29-30-and 29-30 are two pairs of rolls, the inner ones being stationary rolls
(that is to say, not adjustable) having bearings in the boxes 23, partly cast in the
side plates; and the outer rolls being adjustable or movable and having bearings in
boxes formed on the upper ends of rocking supports 30, 31, Figure 11. The arm 32

page_text: of each support extends through the opening 28. in the flange of the plate 1 and is
fitted at its lower end in a concave block which is supported by a screw having
bearings in the lug 27 formed in the case. By this means the rolls may be adjusted
by simply adjusting the screw up or down as may be necessary and the support
permitted to oscillate as described in my other application above referred to. The
lower part of each box 31 is formed with two flanges or cheeks 34 between which
the end of a link 35 Figure 12 is secured by a pin. The other end of each of the
links 35 is formed with a screw threaded socket 36 in which works a screw 37 the
end of which bears, through the medium of a follower-block 38 in an opening 39
in the link 35, against an eccentric lug on the end of a transverse shaft 33, secured
to the case in the manner described in my aforesaid application.
The pairs of rolls may each comprise one smooth roll and one toothed, a milled
or corrugated roll, either of which may be used as the stationary or movable roll if
found desirable.
40 represents the improved duplex feed-box which is constructed with a floor 1
sloping towards each side and preferably divided into two compartments by a
central partition 40%. This box is suspended over the rolls within the casing of the
machine by flexible hangers 41 which are preferably four in number and connected
to the box at its respective corners. Attached to the bottom of the box is a lug or
projection 40b against which works a revolving eccentric shaft 42 having its
bearings 22 cast in the apexes of tho sido plates 1 as already described. This shaft
is provided with a pulley on the outside of the casing of the machine to which
rotation is imparted from one of the rolls by a belt or otherwise. The shaft 42
runs through the machine parallel with the rolls and imparts motion to the box by
abutting against the lug 40b. This motion is resisted by one or more springs 43 2
which may act by either tension or compression. In the illustration given the
spring acts by compression, bearing at its respective ends against the side of the
box and a fixed part of the frame. It may be made adjustable and supported by
a central core of any well know construction. The edges of the box over which
the material sifts are provided with shallow bridges 44 which are made adjustable 3
vertically. They are each provided with a vertical slot at about their mid-length
through which is passed a screw which engages in the edge of the box floor, Its
head being of larger area than the slot, impinges against the face of the serrated
board and thereby bolds it to any position in which it may be set. The material
is fed to the box from one or more hopper spouts 21 which may be of any suitable
construction.
The advantages gained by the use of my improved vibrating feed-box over the
feeding apparatus now in use are, first, its great simplicity and cheapness; second,
it is absolutely automatic under all circumstances, requiring no attention whatever
on the part of the millor; third it distributes the feed uniformly across the entire 1
width of the roll, and, fourth, it is so constructed that one common box, operated
by one common mechanism supplies the feed to two sets of rollers.
The ordinary roll feed now in general use requires constant attention on the part
of the miller to keep it so adjusted that it will feed uniformly. If set too close the
stock accumulates and passes back into tho elevators, causing choke-ups in the 4
Mill. If set so that it passes the material as soon as it is supplied, the rolls will be
fed only a part of their length, often not more than two or three inches, while the
balance of their length is left without any material to operate upon. With my
improved feed box all of these objections are overcome. It matters not whether
there is a large or small supply of material; it is always distributed evenly over 5
the entire length of the rolls.
A cap or hopper which may be made of sheet iron is adapted to fit over the
bottom or delivery hoppers 46, 47, and are connected with pneumatic elevating
tubes 58, as presently to be described.
In the drawings (Figures. 13 and 14) I have not shown the full number of bolts, 5
purifiers, and other machines, ordinarily used in the mill, but have only shown
a sufficient number of bolts and other machinery to fully represent my improved.

page_text: means of elevating and purifying the material. By reference to the drawings it
will be seen that I provide a large fan 48, which in this instance is located at the
top of the mill, but it may be located at any point or position desired. Suitable
air conduits 49 connect with the fan and air chamber 50. To this air chamber are
connected by passages 51 dust catchers 52, 52b, 52°, 52d, as shown in figures 13
and 14. These dust catchers communicate by ducts 53 and main conduit 54 with
practically air-tight settling chambers 55 over the bolts 56. The chamber 55
is provided with a suitable clack valve 57, which valvo is so arranged that by tho
accumulation of stock the material is permitted to fall into the bolt by raising the
valve temporarily without admitting any air to the settling air chamber through
the discharge passage. The elevating pipes 58 leading from the hoppers 46, 47,
or any other part of the mill whence it is desired to elevate material, are also
connected to these tight air chambers 55 in such a manner that the air to be
supplied to the settling chamber is compelled to pass through the elevating pipo,
which is of comparatively small area, and by its rapid transit up said pipe or pipes,
tho material delivered from the rolls, is elevated. The air chamber 55 is made
sufficiently largo to allow of the settling of the material within this chamber
while the dust is drawn out by the air currents, the reason being that the area of
the air pipe 58 connecting with the rolls or other part of the mill whence material
is to be elevated is very small compared with that of the chamber. Hence a
small volume of air is forced through the pipe 58 with a strong current, which
Binall volume of air becomes distributed over the settling chamber leaving the air
within the chamber comparatively inert and without strong currents. The air
and dust pass out through the elevating pipo 54 communicating with the dust
collector 52, through which it passes off very slowly, owing to its being again
distributed over a large area.
It will readily be seen that in this system of elevating the fine fibrous impure
matter, which is so difficult to separate when it is once permitted to pass into tho
bolt with the good stock, will be elevated and caught by the dust catchers. I have
shown in figure 14 one of the dust catchers of the form preferred but they may
be of any suitable construction. The form of dust catchers here shown consists of
a spider or frame having stretchers or rungs 59, over and around which is attached
a continuous band of cloth 60. The bearing of the spider is made hollow as shown
at 61 and is put into communication with the passage 51 leading 'to the air
chamber 50. The air being drawn through this dust catcher it passes out through
the fan entirely free from any material. The dust catcher is caused to revolve and
is provided with a suitable jarring apparatus acting in such a manner that the
stock which accumulates upon the cloth of the dust catcher is jarred off and passes.
out through the dead air chamber 62, Figure 14 thence discharging to the reels or
to the place for which it may be found best suited.
In my improved system of clevating and purifying stock, I use a sufficient
number of dust catchers to correspond with the different qualities of stock to be
operated upon, so that in the rebolting of this material caught by the dust catchers,
it may be handled with the very best advantage.
I place one dust-catcher in the elevator of the stock from the break machines as
shown at 52 in Figure 13. Another dust-catcher 52a may be used in the elevator
of the material from the bran rolls 29a and another as shown at 52b in the elevator
of the material from the germ rolls.
In the elevation of material which is uniformly alike and of the same relative.
valuc, I connect the pipes together shown at 58a, Figure 13, in which case one
elevating pipe may answer for elevating the product from two or more pairs
of rolls.
In the drawings I have shown with a series of break machines, a series of
settling chambers 55, located immediately above the scalping reels, 56.
This material being of uniform nature, I connect to these several settling.
chambers one common suction pipe 54, and into each one of these settling chambers -

page_text: there is connected a suitable suction pipe 58, for elevating material thereto from
the rolls. The material passes up from the first break through one of the pipes 58,
by the suction of air and is discharged into the first settling chamber 55, and from
thence passes through the reel 56, whero a separation of the middlings which may
have been made in this break occurs. The tailings of the first reel are spouted by
a suitable pipe to the second set of rolls and with this second set of rolls is connected
the second of the elevating pipes, 58, communicating with the second of the settling
chambers, 55, over the second scalping reel 56. This process is continued until any
number of breaks are made, which may be optional with the miller. Falling from
the last reel the tailings pass on to the bran roll 29a, and from this roll the
product is elevated to a special settling chamber represented at 64, which settling
chamber connects by suction pipe 65, with the dust-catcher 52a, the bran passing
off through suitable reels to be finished. The middlings which are made in the
several reductions are fed by the individual conveyors 66 and common conveyor 67
to the second elevating pipe 68 by means of which they are drawn up and dis-
charged into the second settling chamber 69 thence passing to suitable bolts 70, as
shown, where they are treated in the usual manner. Purified middlings from the
purifying machine (not shown in this drawing) may be spouted to the rolls 296 and,
after being crushed, elevated to the second series of reels, first passing through the
settling chamber, as represented.
In all the settling chambers I employ valves, as at 57, 57, for the purpose of
preventing any air being drawn up through the discharge openings. The object of
these valves is to arrest the current of air, and they are so arranged that they will
open by the weight of the accumulating material, permit it to discharge, and then
quickly return to place.
In the drawings some of the discharge pipes and elevating pipes are shown
broken off indicating that they may be connected to any desirable machine or
stock discharged at any point desired in the mill.
It is obvious that the suction pipes may be led to the rolls from either side or
end. In one of the drawings they are shown as leading into the side of the
machines, in the other as entering the ends.
The construction of the bolt hoppers and valves is best represented in
Figures 15, 16 & 17 of the drawings.
They are made practically air-tight and connect by a common air trunk and
pipe 54 with the suction fan 48, so that the said fan receives its supply of air
only through the settling chamber or chambers. Immediately over the settling
chambers 55 or at any convenient or desirable point I arrange valves 71 for
regulating the strength of current necessary to clevate the material which is to be
bolted.
The valves 57 of the discharge port of the settling air chamber is so arranged
that by the accumulated weight of the material it will be opened, allowing the
material which has been elevated to discharge itself into the bolt 56 and at the
same time prevent the admission of air into the settling chamber from the bolting
chest. The air settling chamber may be constructed in any form desired and in
proportions which are found to be most desirable but should under all circumstances
be sufficiently large in proportion to the ducts 58 to allow the settling of the
material without being drawn out through the discharge ports into the fan or dust-
catcher, except light fibrous material, which matter will be arrested by dust-
catchers, as above described.
On the plan above described, I construct a series of these air chambers which
may or may not be directly connected with the bolts. These settling air chambers
may occupy a floor immediately above the bolts or may be directly connected
therewith. They may be constructed singly or in any number desired. The pipes
leading into these settling air chambers inay connect with the rolls, purifiers, or
bolts or any machine in the mill where it becomes necessary to elevate material
for the
purpose of bolting or making separations, of any kind. The fan to exhaust

page_text: the air from the settling chambers may be located immediately above the bolt, as
represented in Figures 15, 16 and 17, or through the medium of intermediate pipes,
as represented in figuros 13 and 14.
In short reels and in gradual reduction milling where the material is all of the
same kind, and is subjected to a sifting process after each successive reduction and
is sent for rebolting to one common separating reel, I use the construction
represented in figures 15 and 16 having one common conveyor 72 connected with
a series of-short reels; but in a system of bolting where large capacity is required
I use the construction represented in figure 17, with a separate conveyor 73 for
each bolt, or separate conveyors 73, 74, for carrying the products from different
portions of a graded reel under control of customary cut offs. Bolts below the
ones represented may be indefinitely multiplied.
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 roller mill, the combination with a frame constructed of duplicated
end and side plates, of a cap or cover similarly constructed, the meeting edges of
said parts being formed complementary to each other, as set forth.
Second-The combination of the end plates 2 and 7, constructed as herein
described and shown and adapted for use at either end of the machine, with the
side plates 1, as set forth.
Third-The cap or cover comprising the duplicated plates 15 and 19 and top
plate 18, arranged in the manner and for the purpose herein shown and described.
Fourth-The combination of the lower portion 1, 1-2, 3 of the frame or casing
and the cap or cover 15, 18, 19 constructed and adapted for use substantially as
herein set forth.
Fifth-The combination with the duplicate side plates 1 having the journal
boxes for the stationary or non-adjustable rolls cast therewith, of the duplicate
plates 17 cast with housings for said journals and adapted for use on either side of
the machine as set forth.
Sixth-A vibrating feed-box suspended by flexible straps as and for the purpose
set forth.
Seventh-A double-vibrating feed-box provided with a central partition in
combination with two hopper-spouts, whereby a different class of material may be
fed to each of two sets of rolls, as set forth.
Eighth A double-vibrating feed-box provided with a central partition and one
common means whereby both are vibrated, in combination with two hopper-spouts
and two sets of rolls, as and for the purpose set forth.
Ninth-In a roller-mill, a duplex shaking box and elastic hangers for supporting
the same from above, in combination with two sets of rolls substantially as shown
and described.
Tenth: In a feed apparatus for roller-mills, a suspended box divided in two
compartments, and a common eccentric shaft, in combination with suitable driving
mechanism as set forth.
Eleventh-In a roller-mill the combination of two sets of rolls and a duplex
feed-box with an eccentric or cam-shaft passed through the case of the machine
parallel with the said rolls, as and for the purpose set forth.
Twelfth In a feed apparatus for roller-mills, the combination of the pulley on
the shaft of the roll 30, the eccentric shaft 42, the pulley on the end thereof and ¨
the duplex feed box 40 substantially as and for the purpose set forth.
Thirteenth-In a feed apparatus for roller mills, the combination of the box 40,
the spring 43, and eccentric shaft 42.
Fourteenth-The combination, with two pairs of rolls, of a vibrating feed-box
adapted to supply each pair of rolls from its respective sides with an equal and
uniform quantity of material, as set forth.

page_text: Fifteenth: A vibrating feed-box having shallow bridges over which the material
sifts, in combination with means for imparting a lateral vibratory motion thereto
substantially as set forth.
'Sixteenth-A vibrating feed-box having adjustable bridges over which the
material sifts, in combination with suitable means for imparting motion to said box,
as set forth.
Seventeenth-A duplex feed box, in combination with two pairs of rolls, and
one common means whereby a lateral vibratory motion in imparted to said box, as
set forth.
Eighteenth-In a roller mill the combination of a feed-box, elastic hangers for
supporting the same, and means for imparting a vibratory motion to said box, as
set forth.
Nineteenth-In a roller mill, the combination of two sets of rolls, and a duplex
feed-box with an eccentric for imparting motion to said box in one direction, and a
spring for returning it, substantially as set forth.
Twentieth-In a roller mill, the combination with a vibrating feed-box, of an
eccentric shaft, a pulley on said shaft, a belt, and a pulley on one of the roll shafts
as and for the purpose set forth.
Twenty-one-In a roller mill, the combination, with a feed box, of an eccentric
for imparting a horizontally reciprocating motion thereto, and means for driving
said eccentric from one of the crushing rolls.
Twenty-two-The combination of a series of rolls or breaking machines, a
series of pneumatic elevating pipes of small area, a series of settling chambers, an
exhaust pipe of larger area, a dust catcher and a fan, all arranged substantially in
the manner and for the purposes set forth.
Twenty-three-The combination with a series of pnoumatic elevating tubes of
small area, a series of settling chambers, and an exhaust pipe of larger area, of a
second pneumatic elevating tube of small area, a second settling chamber, a second
exhaust pipe of larger area, and an air trunk and fan common to all, arranged
substantially in the manner and for the purpose sot forth.
Twenty-four-The combination with a rotary flour bolt of a pneumatic
elevating pipe, a settling chamber or bolt hopper of much larger area into which
said pipe delivers, a suction fan for exhausting the air and dust from said settling
chamber, and a feed spout conducting from said chainber to the bolt, whereby the
dust and impurities are carried off before the material reaches the bolt as set forth.
Twenty-five-The combination of the rotary bolt, elevating pipe, suction fan,
settling chamber, valve, and automatic valve, substantially as and for the purposes
set forth.
Twenty-six-The combination of a series of rotary bolts, pneumatic elevating
pipes, settling chambers and a suction fan common to all, substantially as shown
and described.
Twenty-seven-The combination of a bolting reel, a fan and elevating tube
and a practically air-tight settling chamber or hopper into which a current of air is
drawn and the material to be bolted thereby clevated and purified by one common
fun before it reaches the bolt, as set forth.
Dated this 10th J