IMPROVEMENTS IN THE CONSTRUCTION OF ROLLER MILLS, PART of WHICH IMPROVEMENTS IS APPLICABLE TO THE DELIVERY OF MEAL AND OTHER SUBSTANCES INTO OR FROM DRESSING AND OTHER MACHINES "
Year: 1883

page_text: LETTERS PATENT to John Auguste Arnold Buchholz of Twickenham in
the County of Middlesex for an Invention of "IMPROVEMENTS IN THE
CONSTRUCTION OF ROLLER MILLS, PART of WHICH IMPROVEMENTS IS
APPLICABLE TO THE DELIVERY OF MEAL AND OTHER SUBSTANCES INTO OR
FROM DRESSING AND OTHER MACHINES
"
the
PROVISIONAL SPECIFICATION left by the said John Auguste Arnold
Buchholz at the Office of the Commissioners of Patents on
17th September 1883.
OF
WHICH
JOHN AUGUSTE ARNOLD BUCHHOLZ of Twickenham in the County of Middlesex.
"IMPROVEMENTS IN THE CONSTRUCTION OF ROLLER MILLS, PART
IMPROVEMENTS IS APPLICABLE TO THE DELIVERY OF MEAL AND OTHER SUBSTANCES
INTO OR FROM DRESSING AND OTHER MACHINES,"
This invention relates mainly to improvements in the details of construction of
smooth roller and fluted roller mills, the object being either to simplify their
construction or to render them more efficient in their action.
It is sometimes inconvenient to apply the antifriction arrangement described in
my specification dated 1 May 1882 N° 2054, when it would be desirable to
utilize some of its advantages in connection with the common bearings of roller
axles. In such cases I propose to place a pair of antifriction wheels in the vicinity
of the bearings of the fixed roller axle, and against these to bring to bear a second
friction wheel in the direction that it is sought to adjust the other roller. The
axle of the second friction wheels I mount in slots or guides in the framing, the
friction wheels by preference turning on the axle. To this axle I fit cam shaped
rock frames or their equivalent, which will serve, by pressing against the hinged
frames or bearings of the adjustable roller, to limit the approach of that roller to
the fixed roller.
The means for operating this adjustment will be a nut and screw or their
equivalent.

page_text: In order to limit the approach of the adjustable roller to the fixed roller, a
matter of considerable moment where fluted rollers are used, I provide against the
tampering with this adjustment, leaving the Miller free to increase the distance
between the rollers according to the requirements of the work, and allowing the
rollers also to free themselves from an over feed, or from any extraneous hard
substance that may be admitted to the bite of the rolls.
The bearings of the adjustable roller are carried by a hinged frame, and entering
a screwed socket in the upper part of the bearings is a headed screw bolt. These
bolts each carry a lock nut, which, when screwed down to the bearing, will hold
its bolt firmly in place.
Before inserting the screw bolt into the socket of the bearing, it is passed
through the partially closed end of a retaining tube, the other end of which is
fitted with a strap for receiving an excentric. The screw bolt is adjusted in its
socket so that its head shall bear against the inner end of the tube when the
At the same time the
adjustable roller is set to its maximum limit of advance.
screw bolt is left free to play in the tube when the springs which hold down the
adjustable roller are caused to yield to an undue upward or outward pressure.
The axle of the excentric extends across the machine to receive an excentric at
either end, and by imparting an axial motion thereto through a hand wheel, the
tubes will be caused to draw back, through the headed screw bolts, the adjustable
roller to any required distance to suit the work in hand, but no means within the
control of the Miller will allow him to move the adjustable roller past the limit
determined by the manufacturer, or the master miller.
When rollers adjusted so as just to clear each other, are run at high velocities,
and held in a determined position, as in the case where grain has to be ground in
one operation, or when thick brans have to be treated to free them from adhering
flour particles, any jar or irregularities in the driving will mar the work and
endanger the roller surfaces.
To render the motion as certain, smooth, and regular as possible, I place two
driving pulleys on the driving shaft above similar pulleys on the opposite ends of
the roller axles, for the purpose of driving the rollers at both ends with one belt.
The belt is passed from the driving pulley on, say, the left hand side of the
machine, under the pulley of the first roller axle, then over the corresponding
pulley of the second roller axle. Next the belt is led out to and under a skewed
guide pulley, which guides it to the driving pulley on the opposite side of the
machine. The belt then passes down to the pulley on the right hand side of the
first roller, thence to a corresponding pulley on the second roller axle, and by
means of a second skewed pulley, the belt is conducted back to its starting point.
The effect of this arrangement is to produce a perfect balance of all the strains of
the driving gear throughout every part of the machine.
By weighting one of the guide pulleys, the strain of the belt may be made to do
duty for the springs or weights used for pressing the rollers together.
Smooth surface rollers are generally worked under heavy pressure (as compared
with fluted rollers), but heavy pressure entails a great loss of power through the
bearings. The antifriction rollers hitherto tried only partially relieve the bearings.
The most effective antifriction gear for rollers known is the antifriction ring gear
of Mechwart (patent dated Feb: 11th 1878 N° 563), which gear is placed near the
bearings of roller axles, to absorb in useful work part of what otherwise would be
waste power.
The dimensions of the antifriction rings have been such that they required to
be considerably distorted under tension before they would afford the requisite
pressure.
In order to utilize the motive power still more effectually, I make the rings do
the main duty of bearings, which, being placed in vertically slotted guides in the
framing, now only give the roller axles a lateral support. Friction wheels are
keyed on the roller axles for the rings to bear against, and the rings in their turn
I carry on friction rollers. By this means only the weight proper of the rollers is

page_text: carried by the bearings, and that through axles running at a low velocity, in
addition to the slight strains that pass through the bearings for supporting the
roller axles laterally.-The rings are made sufficiently wide to provide ample
bearing for the roller axle, and sufficiently massive to offer the required resistance
for grinding the material fed between the rollers, and yet excrcise no pressure when
the rollers are running empty.
In Roller Mills where three rollers are used together in connection with
Mech wart's antifriction ring arrangement, the middle roller is, as is well known,
placed in rigid bearings, while the second or upper roller bears down on the
first by its own weight, while on the contrary the third or lower roller has a
tendency to drop away from the middle roller. This tendency it has been proposed
to remove by the use of counterweights, but owing to the necessary play in the
bearings, such balancing ceases so soon as the distance adjustment above referred to
is put in operation.
Now in order to balance efficiently the pressure distributed between the two
pairs of rollers, instead of applying the counterweights against the bearings of the
lower roller axle, I cause then to bear against the rings, and through them,
upward, direct against the lower roller axle. To this end I support each ring on a
pair of friction wheels pivotted in a rocking frame, the axle of which is borne on
the short end of a lever, of which the long end is fitted with a sliding adjustable
counterweight.
By this arrangement, the counter balancing will act independently of the roller
axle bearings, and consequently will not be influenced by the mechanism which
operates the distance adjustment of the rollers.
In any multiple roller mill, where the feed to one pair of rollers had to be carried
through the ground meal delivered from an adjacent pair of rollers, the stream of
ground meal, after being split and carried horizontally right and left, is generally
carried down vertically through narrow shutes in the sides of the machine casing.
These shutes are liable to choke.
To meet this difficulty, I propose to use two narrow endless bands arranged to
run in opposite directions over a course represented by a vertical parallelogram,
the bands or belts being held at the angles by small pullies, one of which, in each
parallelogram, is driven from one of the roller axles. The upper horizontal face of
the bands will receive the ground meal from the rollers and carry it, each band to
one of the side shutes, through which it is continued vertically downwards, to
prevent lumps of meal or other obstructions from lodging therein.
It frequently happens that a roller mill fitted with three rollers, or two pairs, is
fed with different descriptions or qualities of corn or meal, which after grinding
require to be variously distributed.
To meet this requirement, I fit the receiving hopper with a longitudinal partition
to form two compartments for receiving the two kinds of meal, and this hopper I
place over two receptacles or conveyors in such a position that its inclined sides
would meet if continued at the partition dividing the receptacle for receiving the
meal into two compartments. Instead, however, of extending the inclined sides of
the hopper down to the partition, I leave a space of say six or eight inches on
each slope immediately over the partition, and cover these spaces by slides, two for
each side, which form a continuation of the inclined sides.-The position of these
slides transversely, will determine which receptacle is to receive one or the other,
or both streams of meal. Thus the streams may meet, or partly meet, each other,
or without meeting may be discharged into either of the receptacles at the pleasure
of the attendant.
This improvement is applicable in all cases where different materials have to be
fed to, or taken from a machine in separate receptacles, or requiring mixing
according to variations of quality, as in the case of flour dressing machines,
middlings and semolina purifiers, and screens of various description.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Auguste Arnold Buchholz in the Patent Office on the
17th March 1884.
JOHN AUGUSTE ARNOLD BUCHHOLZ of Twickenham in the County of Middlesex
" IMPROVEMENTS IN THE CONSTRUCTION OF ROLLER MILLS PART OF WHICH
IMPROVEMENTS IS APPLICABLE TO THE DELIVERY OF MEAL AND OTHER SUBSTANCES
INTO OR FROM DRESSING AND OTHER MACHINES."
"
This Invention relates mainly to improvements in the details of construction of
smooth roller and fluted roller mills, the object being either to simplify their
construction or to render them more efficient in their action
It is sometimes inconvenient to apply the antifriction arrangement described in
my Specification dated first May One thousand eight hundred and eighty-two
No 2054, when it would be desirable to utilize some of its advantages in connection
with the common bearings of roller axles.
In order to ensure a "distance adjustment" between the rollers I propose to
place a pair of antifriction wheels in the vicinity of the bearings of the fixed roller
axle, and against these to bring to bear a second friction wheel in the direction
that it is sought to adjust the other roller.-The axle of the second friction
wheels I mount in slots or guides in the framing the friction wheels by preference
turning on the axle. To this axle I fit cam-shaped rock frames or their
equivalent which will serve by pressing against the hinged frames or bearings of
the adjustable roller to limit the approach of that roller to the fixed roller.
Sheet I of the drawings illustrates this part of the Invention; Fig: 1 is a side
view of the distance adjustment as applied to a roller mill provided with ordinary
bearings, and Fig: 2 is a section taken in the line 1, 2 of Fig: 1 of the "distance
adjustment" of one side of the roller mill.
The bearings of the roller A are fixed, and the bearings of the roller A¹ are
adjustable.
The axle of the roller A is fitted with a pair of small antifriction wheels a which
are enclosed in the bearings, the upper part of the bearings being cut away to
expose a portion of the periphery of the wheels.-Running in contact with each
of these wheels a is an antifriction wheel b nounted in a cam-shaped rocking
frame c. The bosses of this frame which carry the axle of the antifriction wheel b
project into guides formed to receive them in the box frame B.-The cam face of
the rocking frame c underlies the bearing of the roller A¹ and serves to determine
the distance to be maintained between the rollers.
Attached to this cam-shaped rocking frame is an adjusting screw d which passes
through an elongated nut e fitted with a handle for turning it.-The elongated
nut is carried by a socket piece f hinged to the frame B which permits of the
tipping of the screw to adapt it to the varying positions of the cam-shaped
frame c.
By turning the nut e a greater or lesser radius of the cam may be brought into
contact with the bearing of the roller A¹, which being held down to its work by
any approved means may have its distance adjustment accurately determined by
the turning of the nut e.
It will be understood that the nuts e on the opposite sides of the mill may be
connected together by gearing, by which means the simultaneous adjustment of the
opposite ends of the roller will be ensured.
In order to limit the approach of the adjustable roller to the fixed roller, a
inatter of considerable moment where fluted rollers are used, I provide against the
tampering with this adjustment leaving the Miller free to increase the distance
between the rollers according to the requirements of the work and allowing the
rollers also to free themselves from an overfeed or from any extraneous hard
substance that may be admitted to the bite of the rolls.

page_text: In Sheet II of the drawings I have shown an arrangement of crushing discs or
short rollers with a modification of the distance adjustment for fixing a limit of
adjustment available to the attendant of the mill.
Fig 3 is a side elevation of the crushing mill,-Fig: 4 is an end elevation, and
Fig: 5 a section taken in the line 1, 2 of Fig: 3.
In these Figures A is the stationary roller or disc, and A¹ the adjustable roller
or disc. They are furnished with sleeves a a', which are mounted in bearings,
those of the roller A being carried in the framing B and those of the roller A¹
forming part of a pair of rocking arms C which have their fulcrums on the main
framing.
Through the sleeves of these rollers dead axles are passed.-The lower axle has
strung upon it a pair of rock levers D, the tail ends of which are pressed upon by
an adjustable spring D₁ carried by the main framing B.-Pivotted to these
levers are link rods E E which are strung onto the axle of the upper disc or
roller. The pressure therefore of the spring D¹ will tend to draw the two discs or
rollers together.
To provide a limit to the adjustment apart of these discs or rollers the bearings.
of the rollers A¹ are connected to a pair of pendent telescopic rods F F, which are
raised or lowered by means of a pair of excentrics F' carried by a cross shaft
mounted in the main framing.
These excentrics work in a strap with which their respective rods are provided
and the limit of close adjustment of which the roller A¹ is susceptible, after being
once set for working, is reached by bringing the smallest radius of the excentrixs
into action upon the excentric straps.
The telescopic rods I so form as to permit of their permanent adjustment as
respects length at the time of putting the parts together, and yet allow of
their contraction while the mill is at work to relieve the discs or rollers from an
overfeed or from any extraneous hard substance that may be admitted to the bite
of the rollera.
'
The upper roller bearings are cast with a lug to which is pinned a cheek joint f
carrying a screw bolt f.-This bolt is passed through a tube f' the lower end of
which is contracted to provide a seat for the head of the bolt.-The end of
upper
this tube is closed by the strap piece before mentioned which strap piece is secured
by a key to the tube f-A nut on the screw bolt serves to prevent the turning of
the bolt in the cheek joint f.
It will now be understood how freedom for the upper roller to rise is secured
while at the same time a limit is provided to the close adjustment of the rollers.
The excentrics F¹ are turned by means of a worm and worm wheel F³, which
provide for the nice adjustment of the upper roller to suit the work in hand.
It will now be seen that as the excentrics are the only means of adjustment
within the control of the attendant, he cannot move the adjustable roller past the
limit determined by the manufacturer of the mill or by the Master Miller. This is
a matter of great moment in the case of grooved rollers worked at a great velocity
to reduce for example grain to flour at, say, a single operation.
A slight modification of this arrangement for limiting the control of the miller in
respect of the distance adjustment of his rollers is shewn in Sheet III where Fig: 6
is a side elevation of a two-roller mill, like that just described. Fig: 7 is a section
taken in the line 1, 2 of Fig: 6, and Fig: 8 is a front view of the roller mill.
In this instance the rollers A A¹ are keyed to live axles, the lower axle turning
Din fixed bearings and the upper axle in a pair of arms C pivotted to the
framing B.-These arms extend beyond the axle and towards the front of the
mill, and are formed with bosses at their forward extremity.
Through these bosses are passed freely a pair of screw bolts f¹ furnished with an
eye at top corresponding to the excentric straps of Fig: 3.-By these eyes the bolts
5 are suspended from a crank shaft mounted in the main framing, the crank pins F¹
of that shaft passing through the eyes of the bolts.

page_text: Nuts formed with disc-shaped flanges are screwed onto the lower ends of the
bolts, and brought into contact with the arms C.-fare arms made fast by pins
to the extremities of the bolts and pierced with a hole corresponding to a ring of
holes formed in the flange of the nut f. These holes are intended to receive a
locking pin f³ formed with a head, which pin when the nut is adjusted to the
desired position is dropped through the hole in the flange that coincides with
the hole in the arm f and thus prevents the shifting of the nut.-A hole is
diilled laterally through the end of the locking pin to receive a padlock f* which
when locked will prevent the withdrawal of the pin and consequently the
tampering with the adjusted nut.
The crank shaft is fitted with a worm wheel F into which gears & worm
mounted on a short shaft and carrying a hand wheel.
By this arrangement an axial motion may be imparted to the crank shaft.
If now the pendent screw bolts are brought to their lowest position and their
nuts are then adjusted to set the roller A¹ to its minimum distance from the lower
roller A and secured in position as above explained, the Miller will be free to
adjust the roller as before explained to suit the work in hand and in case any
choking of the mill should occur the roller may rise and prevent the straining
of the machinery.
As however the adjusting nuts are locked, the Miller cannot with his limited
control of the adjustinent approximate the rollers unduly to one another.
When rollers adjusted so as just to clear each other are run at high velocities
and are held in a determined position as in the case where grain has to be ground
in one or two operations, or when thick brans have to be treated to free them from
adhering flour particles, any jar or irregularities in the driving will mar the work
and endanger the roller surfaces.
To render the motion as certain, smooth and regular as possible, I adopt the
arrangement of driving gear shown at Figures 3. 4, and 5, for driving the rollers
of flour mills adjusted in the manner above described.
In these views it will be seen that on the driving shaft G I place two driving
pullies g g above similar pullies a² a³ on the opposite ends of the axle of the
roller A for the purpose of driving the rollers at both ends with one belt.-This
belt G is passed from the driving pulley say g on the left hand side of the machine
under the pulley a² of the axle of the first roller A.-The belt then passes over the
corresponding pulley a¹ of the axle of the second roller A¹, and it is next led out to
and under a skewed guide pulley h, which guides it up to the driving pulley g¹-
The belt then passes down to the pulley a³ on the right hand side of the first roller,
thence to a corresponding pulley as on the second roller axle, and by means of a
second skewed pulley the belt is conducted back to its starting point.--The
effect of this arrangement is to produce a perfect balance of all the strains of the
driving gear throughout every part of the machine:
This arrangement of driving gear further enables me by simply weighting one of
the guide pulleys to dispense with the extra set of bearings employed by ine to
take up the pressure independently of the distance adjustment as described in the
Specification of my Patent N° 1262 One thousand eight hundred and eighty three.
An illustration of this arrangement is given in the Figures in Sheet III before
referred to, and also in the diagram plan view Fig: 9, where the same letters of
reference are used to indicate the parts just described.
The guide pulleys h h¹ Fig: 6, are carried by cross-heads H H' mounted between
guide rods H H pendent from the base plate of the mill.
The upper cross-head H when adjusted to its required position is made fast to
the rods H but the cross-head H¹ which carries the guide pulley h¹ is free to slide
on the guide rods, it being held up by the band G'.
Pendent from this cross-head is a weighted rod H³ which is intended to hold
the driving band G₁ at the desired tension-The arrangement of this Band being
similar to that described with reference to the figures in Sheet II it will serve

page_text: to put the requisite downward pressure upon the upper roller A¹ and thus render
the ordinary means used for holding down the roller unnecessary.
Smooth surface rollers are generally worked under heavy pressure (as compared
with fluted rollers) but heavy pressure entails a great loss of power through the
bearings. The antifriction rollers hitherto tried only partially relieve the
bearings-The most effective antifriction gear for rollers known is the antifriction
ring gear of Mech wart, Patent dated February eleventh One thousand eight
hundred and seventy eight, N° 563, which gear is placed near the bearings of roller
axles to absorb in useful work part of what otherwise would be waste power.
The dimensions of the antifriction rings have been such that they required
to be considerably distorted under tension before they would afford the requisite
pressure
In order to utilize the motive power still more effectually I make the rings do
the main duty of bearings. The bearings used being placed in vertically slotted
guides in the framing now, only give the roller axles a lateral support.
This part of my Invention is illustrated in Sheet IV of the drawings,, where
Fig 10 is a partial side elevation of a roller mill and Fig 11 is a partial front
view of the same with the improvement applied thereto.
In these figures A A¹ are the crushing rollers and I is one of a pair of anti-
friction rings embracing the antifriction wheels which are keyed on the
roller axles.
Strung upon each end of the axle of the lower roller is a pair of radius arms I¹,
and upon each of these arms is mounted a pair of antifriction wheels i³ ³, the
wheels being interposed between the wheel of the axle of the lower roller and
the ring I, and the wheels is being situate outside the ring and serving to support
its weight.
These radius arms I are connected together near their lower ends by a screwed
rod and nuts I-As the ring I bears upon the wheel i¹ of the axle of the upper
roller A¹, and the friction wheels are interposed between the friction wheel i of
the fixed roller A, and the ring I, the drawing together of the radius arms I by
the tightening up of the nut of the rod I will cause the ring to hold down the
upper roller relieving at the same time the bearings of all pressure
The axles of the friction wheels are elongated to receive each a pair of
bearings which slide in segment-shaped grooves formed in the main framing, and
to allow of the movement of the radius arms a little play is given for the axle of
the wheels in these arms. Thus the weight of the rollers and of the antifriction
rings is transmitted through the friction wheels to the main framing.
The rings are made sufficiently wide to provide ample bearing surface for the
friction wheels; and sufficiently massive to offer the required resistance for grinding
the material fed between the rollers, and yet exercise no pressure when the rollers
are running empty.
It will be understood that the same arrangement for adjusting the pressure is
provided at opposite sides of the roller mill.
In Roller Mills where three rollers are used together in connection with
Mechwart's antifriction ring arrangement, the middie roller is as is well known
placed in rigid bearings and the second or upper roller bears down on the first by
its own weight, while on the contrary the third or lower roller has a tendency to
drop away from the middle roller. This tendency it has been proposed to remove
by the use of counterweights but owing to the necessary play in the bearings
such balancing ceases so soon as the distance adjustment above referred to is put
in operation.
Now in order to balance efficiently the pressure distributed between the two
pairs of rollers instead of applying the counterweights against the bearings of the
lower roller axle, I cause them to bear against the rings and through them upward
direct against the lower roller axle.
In Sheet V of the drawing, Fig 12 shews in side elevation a Roller Mill fitted
according to this part of my Invention. I is one of a pair of rings situated on

page_text: opposite sides of the Mill and supported on a pair of friction wheels 3 pivotted
in a rocking frame I³, the axle of which placed vertically below the centre of
gravity of the lower roller, is borne on the short end of a lever I', the long end of
this lever being fitted with a sliding adjustable counterweight.
By this arrangement the counter balancing will act independently of the roller
axle bearings, and consequently will not be influenced by the mechanism which
operates the distance adjustinent of the rollers
In any multiple roller Mill where the feed to one pair of rollers had to be carried
through the ground meal delivered from an adjacent pair of rollers, the stream of
ground meal after being split and carried horizontally right and left is generally
carried down vertically through narrow shutes in the sides of the machine casing.
These shutes are liable to choke.
To meet this difficulty I propose to use two narrow endless bands arranged to
run in a trough in opposite directions over a course represented by a vertical
parallelogram the bands or belts being held at the angles by small pullies one of
which in each parallelogram is driven from one of the roller axles.
Figures 13 and 14 Sheet V illustrate this part of my Invention, K K' being the
endless bands which run in a trough K' and receive the meal from the upper and
middle rollers; k are the tension rollers for the band K and k¹ the tension rollers
for the bank K¹.
The meal as it is formed is received onto a scraper K³ which delivers it onto the
travelling bands
Motion is communicated to the bands from the middle roller by means of worms
and worm wheels, the worm wheels being keyed onto the axles of one of the
tension rollers of each set.. The bands as they receive the ground meal from
the rollers will carry it to the side shutes and these bands being carried vertically
downwards will prevent lumps of meal or other obstructions from lodging in the
sbutes.
An obvious modification of this arrangement is to place the two bands side by
side giving them as before a travelling motion in opposite directions in the
trough K the cover of which is so slotted as to divide the delivery of the meal
from the scraper K³ equally between the two bands. This modification is illustrated
in Sheet VI of the drawings where Figures 15, 16 and 17 represent the arrangement
in sectional side, front and plan views.
Corresponding to the two bands, two slots are formed in the cover of the trough
serving to expose for one-half the length, the band K³, and the other to expose for
the other half of the length of the trough the band K.
As the meal falls from the scraper one half will thus be delivered to the band K,
and the other half to the band K', which travelling in opposite directions as in the
preceding arrangement will convey the meal into and through the side shutes as
already explained.
It frequently happens that a roller mill fitted with three rollers or two pairs of
rollers is simultaneously fed with different descriptions or qualities of corn or meal
which after reduction require to be variously distributed.
To meet this requirement I employ the arrangement of meal distributor
illustrated in Sheet VI, Fig 18 shewing in plan view the case or hopper by which
the meal is conducted to the receivers, Fig 19 shewing the same in cross section
with the grinding roller in place, and Fig 20 shewing a vertical section of the
hopper at right angles to Fig 19.
L is the case or receiving hopper of the Mill fitted with a longitudinal partition
which divides it into two compartments for receiving the two kinds of meal. The
bottom of this hopper is formed by inclining the sides to a V shape in cross section,
and openings are made in the inclined portions which are closed by sliding
shutters on either side of the central partition. The hopper L is situate over
two conveyors or receptacles M M, in such a position that its inclined sides would
meet if continued at a partition m which divides the receptacle for the Meal into
two compartments M M². The open spaces in the inclines covered by the

page_text: shutters extend the whole length of the hopper, and have a depth of from six
to eight inches. The position of these sliding shutters transversely will determine
which of the receptacles M M' is to receive one or the other or both streams of
meal. Thus the streams may meet or partly meet each other, or without meeting
may be discharged into either division of the receptacle at the pleasure of the
attendant.
In the Figures referred to I have shewn rigid sliding shutters, but the shutters
may be inade to coil upon rollers as shewn in the diagrams Figures 21 and 22, the
advantage of this form of shutter being that an economy of space is ensured.
This improved meal distributor is applicable in all cases where different materials
have to be fed to a Machine and delivered therefrom into separate receptacles or
in a mixed state according to variations of quality as in the case of flour
dressing machines, middlings and semolina purifiers, and screens of various
descriptions
"
Having now set forth the nature of my Invention of "Improvements in the
construction of Roller Mills part of which improvements is applicable to the
delivery of Meal and other substances into or froin dressing and other Machines
and having explained the manner of carrying the same into effect I wish it to be
understood that under the above in part recited Letters Patent I claim :-
First The means for effecting the "distance adjustment" between the rollers of
roller Mills as described with reference to Figures 1 and 2 of the drawings.
* distance
Second The means for preventing the tampering with the
adjustment" as described with reference to Figures 3. 4 and 5 and 6. 7 and 8 of
the drawings.
-
Third The application to Roller Mills of the arrangement of driving gear
above described with reference to Figures 3. 4 and 5.
Fourth The application to Roller Mills of the arrangement of driving gear
described (with reference to figures 6. 7. 8 and 9) whereby in addition to driving
the rollers, the belt is made to impart the requisite pressure thereto, and render
unnecessary the employment of special pressure bearings without prejudice to the
distance adjustment.
Fifth. The means above described with reference to Figures 10 and 11 of the
drawings for the more effective utilization of the pressure required in Roller Mills.
Sixth The arrangement above described with reference to Fig 12 of the
drawings for equalizing the pressure of the top and bottom rollers of three-roller
Mills.
Seventh The application to multiple roller Mills of the means above described
with reference to Figures 13. 14. 15. 16 and 17 of the drawings, for preventing
the choking of the side shutes or delivery channels of such Mills.
Eighth The application to Roller Mills containing three or more rollers, of the
Meal distributor constructed and operating in the manner described with reference
to Figures 18. 19 and 20 of the drawings.
Ninth The use of the distributor illustrated at Figures 18, 19, and 20 for
delivering meal and other substances into or from dressing and other machines for
which such distributor is applicable
In witness whereof I the said John Auguste Arnold Buchholz have hereunto set
my hand and seal the fifteenth day of March in the year of our Lord One thousand
eight hundred and eighty four.
JA ARNOLD BUCHHOLZ
(L.S.)