IMPROVEMENTS IN APPARATUS FOR GRINDING CORN OR GRAIN, AND FOR LETTERS SIFTING OR SEPARATING THE HE
Year: 1883

page_text: LETTERS PATENT to Henry Harris Lake of the firm of Haseltine, Lake
& Co, Patent Agents, Southampton Buildings, London for an Invention of
"IMPROVEMENTS IN APPARATUS FOR GRINDING CORN OR GRAIN, AND FOR
LETTERS PATENT to Henry Harris Lake of the firm of Haseltine, Lake
& C°, Patent Agents, Southampton Buildings, London for an Invention of
"IMPROVEMENTS IN APPARATUS FOR GRINDING CORN OR GRAIN, AND FOR
SIFTING OR SEPARATING THE HEAL communicated to him from abroad by
Harley Monroe Rounds, of Clear Lake, Iowa, and Richard Kirby Noye, of
Buffalo, New York, Both in the United States of America
PROVISIONAL SPECIFICATION left by the said Henry Harris Lake at the
Office of the Commissioners of Patents on the 12th February 1883.
"
HENRY HARRIS LAKE of the firm of Haseltine Lake & Co Patent Agents
Southampton Buildings London "IMPROVEMENTS IN APPARATUS FOR GRINDING
CORN OR GRAIN, AND FOR SIFTING OR SEPARATING THE MEAL [A communi-
cation to him from abroad by Harley Monroe Rounds, of Clear Lake, Iowa,
and Richard Kirby Noye, of Buffalo, New York, Both in the United States of
America]
This invention relates to that class of roller mills which are employed in the
reduction of grain, and has for its object to so organize the roller mill that the
material operated upon is passed successively between different portions or sections
of the same pair of rollers and subjected to a screening operation after each
reduction, whereby the fine product of each reduction is separated from the coarse
product and the latter fed to the next following pair of sections or portions of the
rollers, so that the same pair of rollers is utilized for effecting a number of
reductions, the coarse bran or residue being finally discharged, while the finer
portions, composed of the flour-producing parts of the kernels of grain, are collected
and further treated as may be necessary to produce the desired ultimate product.
In carrying the said invention into practice the two rollers are supported in the
side frames by means of suitable journal boxes.
'
The said rollers are each composed of a corresponding number of cylindrical
sections or portions arranged side by side upon the same shaft.

page_text: The sections which first receive the material to be reduced, are made smallest in
their aggregate diameters, so that the space between the opposing portions of these
sections is larger than the space between any of the succeeding sections. The next
following pair of sections is made somewhat larger in their aggregate diameters
and the space between the opposing faces correspondingly smaller than the space
between the opposing faces of the preceding pair of sections, and the next following
pair of sections are made still larger in their aggregate diameters and the space
between the opposing faces still smaller, and so on to the last pair of sections on
the same pair of rollers, if more than three pairs of sections are employed on the
same pair of rollers. The several pairs of sections on the same pair of rollers are
provided with ribs or corrugations suitable for the reduction of the grain, the cor-
rugations being coarsest on the first pair of sections and increasing in fineness on
the succeeding pairs of sections. The ribs or corrugations are preferably arranged
Tengthwise of the rollers at a greater or less angle to the axis thereof and in the
same direction on both rollers.
The several sections or working faces on both rollers increase in length from the
first pair of sections to the last pair of sections, that is, the second pair of sections
are made longer than the first pair of sections and the third pair of sections are
made longer than the preceding pair of sections, and so on, if more than three pairs
of sections are employed on the same pair of rollers. The lengths of the different
sections are so graduated that each pair of sections after the first pair will have the
proper capacity to reduce that part of the material which is delivered to such pair
of sections after the separation of the coarse from the fine product of the last
preceding pair of sections has been effected, and as the working faces of such pair
of sections more closely approach each other than those of the last precoding-pair,
the length of such pair of sections is correspondingly increased to reduce all the
material which it receives without unduly crowding such pair of sections. By this
incans the work is evenly distributed-over the several successive pairs of sections
and the pressure is correspondingly equalized upon all of the working faces of the
different pairs of sections as well as upon the bearings at both ends of the rollers,
and the length of the rollers is reduced to that which is necessarily required to do
the desired amount of work. The several working faces or sections of each roller
are separated by annular grooves or depressions which recede to, or below, the
bases of the ribs or corrugations formed in the working faces of the rollers and
which permit these ribs or corrugations to be formed in the working faces by
suitable cutting tools when the several sections of each roller are constructed in
one piece.
A casing incloses the rollers, and a feed hopper is arranged above the rollers and
supported upon the casing-The latter, and the feed hopper, are provided with
vertical partitions which are arranged between the several sections of the rollers
and project into the groove thereof, so as to separate the material passing to and
from each pair of sections from that which passes to and from each other pair.
A feed roller is arranged in the discharge opening of the feed hopper and there
are adjustable feed gates of any well known and suitable construction provided in
the feed hopper for the several compartments thereof, so that the feed to each pair
of sections of the rollers can be regulated independently. A pulley is mounted on
the end of the shaft of the feed roller and there is an endless belt whereby the
pulley is rotated from the shaft of one of the rollers.
The lower portion of the casing is constructed with inclined sides or made
hopper-shaped.
Separating sieves are arranged below the discharge openings of the casing so as
to receive the material which escapes from the several sections of the rollers; these
separating sieves are supported in a shaking frame which is hung to a stationary
frame by means of rods. The shaking frame is vibrated by means of an eccentric
which is mounted upon a horizontal shaft and a rod which connects said eccentric
with the shaker frame.
The shaft is rotated by means of an endless belt which runs around a pulley on

page_text: the shaft and around a pulley upon the shaft of one of the rollers. The sieves are
separated by partitions corresponding in position with the partitions of the roller
casing, so that each sieve receives only the material delivered from one pair of
sections and treats the same separately.
The several successive sieves or separators are preferably made of increasing
width as the roller sections increase in length in order to adapt the separating
capacity of the successive sieves to the increasing quantity of fine material produced
by the successive breaks or reductions.
A tight inclined bottom is arranged underneath the sieves so as to receive the
fine material which passes through the meshes of the sieves, and there is a hopper
or receptacle which is arranged underneath the rear portion of the tight bottom for
the reception of the material which is delivered from said bottom into the recep-
tacle by the shaking motion of the frame through an opening formed in said bottom
above the receptacle.
Elevators receive the coarse products of each separation except the last and
deliver the same by spouts into the compartments of the feed hopper over the next
following pairs of sections of the rollers."
Both journal boxes on the same side of the machine are supported in the upper
part of the side frame and confined by means of a cap piece which covers the boxes
and is secured to the side frame. One box rests with its outer side against the
vertical portion of the side frame and is capable of a slight vertical adjustment
between the side frame and the cap, which adjustment is effected by means of two
set screws, applied respectively to the upper and lower sides of the box. The inner
end of the box rests upon the side frame while its outer end can be raised and
lowered by said set screws, as may be necessary. One box slides horizontally in
the ways formed by the horizontal upper side of the side frame and cap, and is
pressed toward the other box by means of a spring interposed between the box and
a follower which is adjusted by means of a set screw working in a threaded
opening in the vertical portion of the side frame, whereby the tension of the spring
can be regulated.
An upright lever bears with its lower end against the inner lower edge of one
box and finds its fulcrum at the inner side of the other box so that by moving the
lever in one or the other direction one box will be moved toward or from the other
box as may be desired. An adjusting rod is attached with its inner end to the
upper end of the lever and passes with its screw threaded outer portion through an
opening formed in a standard which is cast on or secured to the cap. A screw nut
is provided with a hand wheel and applied to the screw-threaded portion of the
rod on the outer side of the standard, and jam-nuts are applied to the rod on the
outer side of the screw nut for securing the latter in position after it has been
adjusted.
Some of the screw nuts are also employed for forming a stop on the screw
threaded rod whereby the inward movement of the rod is limited either in such
manner as to arrest its movement before the rollers come in contact with each other,
or so that the movable roller is arrested in its movement toward the stationary
roller at a certain point of adjustment, thereby enabling the operator to return the
rollers to this predetermined adjustment when the rollers have been separated.
By moving the upper end of the lever outwardly the rollers are separated and by
a reverse movement of the lever the rollers are permitted to approach each other.
A separate adjusting device is provided for each pair of boxes at each end of the
rollers, and by adjusting the rollers at one end only, the space between the working
faces near that end can be increased or lessened without materially affecting or
altering the position of the working faces at the opposite end of the rollers.
The gradually decreasing spaces between the working faces of the different pairs
of sections of the rollers provide for the relative adjustment of the different
reductions, and the adjustment of one roller with reference to the other roller enables
the reductions to be adapted to the varying conditions of the grain, whether hard
or soft, dry or damp &*.

page_text: A driving pulley is mounted on the shaft of one of the rollers and another
driving pulley is mounted on the shaft of the other roller. The last named pulley
is made somewhat larger in diameter than the other pulley so that the rollers revolve
with the different peripheral rates of speed. Any other suitable driving mechanism
whereby the desired relative motion of the rollers is attained may, however, be used
if preferred.
The grain to be reduced is delivered into the first compartment of the feed-hopper
above the first pair of sections and in passing between these sections it is coarsely
cracked and the material derived from the first reduction is delivered upon the head
of the first sieve. The material now passes over the sieve and is separated thereby
according to fineness, the fine material passing through the meshes, of the sieve,
while the coarse material escapes over the tail of the sieve and passes into the foot
of the first elevator. The sieves are so clothed that the fragments of the flour-
producing portions of the grain pass through the meshes of the sieve, while the
bran or coarse fragments escapes over the tail end of the sieve. The elevator
delivers the coarse material derived from the first separation into the second
compartment of the feed-hopper above the second pair of sections from which it
passes between said sections whereby the material is further reduced. The product
of the second reduction is delivered upon the head of the second sieve which again
effects a separation of the finer-material from the bran and material adhering
thereto, the finer material passing through the meshes of the sieve and the bran
and material adhering thereto passing over the tail of the sieve into the foot of the
second elevator by which the material is delivered into the third compartment of
the feed hopper above the third pair of sections. The material is now further
reduced between the third pair of sections and the product of this reduction is
delivered upon the third tiove which effects a third separation of the fine material
and the coarse residue, and this operation is repeated as many times us there are
pairs of sections on the same pair of rollers.
The fine material which passes through the meshes of the separating sieves and
which consists of fragments of the flour-producing parts of the grain falls upon the
inclined tight bottom and is delivered by the same into the receptacle from which
it is conducted to such other machines as may be desirable or necessary to produce
the desired ultimate product. The coarse material derived from the last separation
and which consists of bran deprived of the flour producing parts of the grain is
discharged from the tail end of the last separating sieve and conveyed to any
suitable receptacle.
Instead of shaking sieves, revolving or other suitable screens may be employed
for separating the products of the several reductions, if preferred.
The first pair of sections of the rollers whereby the first reduction is effected, may
be constructed with smooth working faces but I prefer to employ a coarse dress on
these sections as it gives better results.
This improved roller mill is especially adapted to be used in small mills as it
combines in one machine all the advantages of a train or set of roller mills. It is
very simple in construction and occupies but little space, it is easily managed and
constructed at comparatively small expense considering its capacity and it is
operated with less power than a corresponding number of rollers of the same
capacity.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Harris Lake in the Great Seal Patent Office on the
28th July 1883.
"
HENRY HARRIS LAKE, of the firm of Haseltine, Lake, and Co, Patent Agents,
Southampton Buildings, London, "IMPROVEMENTS IN APPARATUS FOR GRINDING
CORN OR GRAIN, AND FOR SIFTING OR SEPARATING THE MEAL A communi-
cation to me from abroad by Harley Monroe Rounds, of Clear Lake, 'Iowa,
and Richard Kirby Noye, of Buffalo, New York, both in the United States of
America,
This invention relates to apparatus for grinding corn or grain and for sifting or
separating the meal, and has for its object to so organize the roller-mill that the
material operated upon is passed successively between different portions or sections
of the same pair of rollers, and subjected to a screening operation after each
reduction, whereby the fine product of each reduction is separated from the coarse
product, and the latter fed to the next following pair of sections or portions of the
rollers, so that the same pair of rollers is utilized for effecting a number of
reductions, the coarse bran or residue being finally discharged, while the finer
portions, composed of the flour-producing parts of the kernels of grain, are collected
and further treated as may be necessary to produce the desired ultimate product
The said invention consists in the improvements hereinafter set forth.
In the accompanying drawing
Figure 1 is a side elevation of apparatus constructed according to this invention
Figure 2 is a vertical section of the roller-mill drawn to an enlarged scale.
Figure 3 is a horizontal section, and
Figure 4 is a front elevation of the same
Figure 5 is a sectional elevation of the adjusting device applied to the journal-
boxes of the rollers.
Figure 6 is a plan of the roller mill
Similar letters of reference indicate corresponding parts in the several figures
A. A indicate the side frames of the roller-mill proper, and B B' the two rollers
which are supported in the said side frames by means of suitable journal-boxes
The rollers B B¹ are each composed of a corresponding number of cylindrical
sections or portions b, b', 6' arranged side by side upon the same shaft. The
sections b b which first receive the material to be reduced are made smallest in their
aggregate diameters, so that the space between the opposing" portions of these
sections is larger than the space between any of the succeeding sections. The next
following pair of sections b¹ b' is made somewhat larger in their aggregate
diameters, and the space between their opposing faces correspondingly smaller than
the space between the opposing faces of the preceding pair of sections b; and the
next following pair of sections are made still larger in their aggregate diameters
and the space between the opposing faces still smaller, and so on to the last pair of
sections on the same pair of rollers, if more than three pairs of sections are
employed on the same pair of rollers.
The several pairs of sections on the same pair of rollers are provided with ribs
or corrugations suitable for the reduction of the grain, the corrugations being
coarsest on the first pair of sections b, and increasing in fineness on the succeeding
pairs of sections. The ribs or corrugations are preferably arranged lengthwise of
the rollers, at a greater or less angle to the axis thereof, and in the same direction
on both rollers, as indicated in Figure 3
The several sections or working-faces on both rollers increase in length from the
first pair of sections 6 to the last pair of sections that is to say the second pair of

page_text: sections b' is made longer than the first pair of sections b, and the third pair of
sections b' is made longer than the preceding pair of sections b¹, and so on, if more
than three pairs of sections are employed on the same pair of rollers.
The lengths of the different sections are so graduated, that each pair of sections,
after the first pair, have the proper capacity to reduce that part of the material
which is delivered to such pair of sections after the separation of the coarse
from the fine product of the last preceding pair of sections has been effected, and,
as the working-faces of such pair of sections more closely approach each other
than those of the last preceding pair, the length of such pair of sections is
correspondingly increased to reduce all the material which it receives without
unduly crowding such pair of sections. By this means the work is evenly
distributed over the several successive pairs of sections, and the pressure is
correspondingly equalized upon all of the working-faces of the different pairs of
sections, as well as upon the bearings at both ends of the rollers, and the length of
the rollers is reduced to that, which is necessarily required to do the desired amount
of work. The several working faces or sections of each roller are separated by
annular grooves or depressions c which recede to or below the bases of the ribs or
corrugations formed in the said working-faces and which permit these ribs or
corrugations to be formed by suitable cutting-tools when the several sections of
each roller are constructed in one piece.
D indicates the casing which encloses the rollers, and d indicates the feed-hopper,
arranged above the rollers and supported upon the casing D. The latter and the
feed-hopper d are provided with vertical partitions e e¹, which are arranged
between-the-several sections of the rollers and project into the grooves c thereof,
so as to separate the material passing to and from each pair of sections from that
which passes to and from each other pair.
findicates a feed-roller arranged in the discharge opening of the feed hopper d,
and adjustable-feed gates of any well known and suitable construction
provided in the feed-hopper d for the several compartments thereof so that the
feed to each pair of sections of the rollers can be regulated independently
-
f* indicates a pulley mounted on the end of the shaft of the feed-roller f, and fo
an endless belt whereby the pulley f* is rotated from the shaft of the roller B'.
The lower portion of the casing D is constructed with inclined sides, or made
hopper-shaped as represented in Figure 2
G, G, G indicate separating-sieves which are arranged below the discharge
openings of the casing D, so as to receive the material which escapes from the
several sections of the rollers.
As shown in the drawing, these separating-sieves are supported in a shaking-
frame H, which is hung to a stationary frame H by means of rods h. The frame H
is vibrated by means of an eccentric i which is mounted upon a horizontal shaft it,
and a rod which connects the said eccentric with the said frame. The shaft i¹ is
rotated by means of an endless belt ; which runs around a pulley ¹ on the shaft i¹
and around a pulley j upon the shaft of the roller B. The sieves G, G¹, G' are
separated by partitions K, corresponding in position with the partitions e e¹ of the
roller casing, so that each sieve receives only the material delivered from one pair
of sections and treats the same separately. The several successive sieves or
separators G, G¹, G³ are preferably made of increasing width as the roller-sections
increase in length, in order to adapt the separating capacity of the successive sieves
to the increasing quantity of fine material produced by the successive breaks or
reductions
l indicates a tight inclined bottom arranged underneath the sieves G, G¹, G³, so
as to receive the fine material which passes through the meshes of the sieves, and L
indicates a hopper or receptacle, which is arranged underneath the rear portion of
the tight bottom, for the reception of the material, which is delivered from the
said bottom into the receptacle L by the shaking motion of the frame H through
an opening formed in said bottom above the receptacle L.
MM indicate elevators, which receive the coarse products of each separation,

page_text: except the last and deliver the same by spouts m m³ into the compartments of the
feed-hopper over the next following pairs of sections of the rollers
N N indicate the journal-boxes of the roller B. and O. O the journal-boxes of
the roller B¹. Both boxes on the same side of the machine are supported in the
upper part of the side frame A, and confined by means of a cap-piece P which
covers the boxes and is secured to the side frame A. The box N rests with its
outer side against the vertical portion of the side frame, and is capable of a slight
vertical adjustment between the side frame and the cap P, which adjustment is
effected by means of two set screws n n' applied respectively to the upper and
lower sides of the box N. The inner end of the box rests upon the side frame A,
while its outer end can be raised and lowered by said set-screws, as may be
necessary. The box O slides horizontally in the guides formed by the horizontal
upper side of the side frame A and cap P, and is pressed toward the box N by
means of a spring q interposed between the box O and a follower q¹ which is
adjusted by means of a set-screw q2 working in a threaded opening in the
vertical portion q³ of the side frame, whereby the tension of the spring can be
regulated.
R indicates an upright lever, which bears with its lower end against the inner
lower edge of the box N and which has its fulcrum at the inner side of the box O,
so that by moving the lever R in one or the other direction the box O will be
moved toward or from the box N as may be desired.
indicates an adjusting-rod which is attached at its inner end to the upper end
of the lever R, and which passes with its screw-threaded outer portion through an
opening formed in a standard S, which is cast on or secured to, the cap P
a indicates a screw-nut provided with a hand-wheel, and applied to the screw-
threaded portion of the rod r on the outer side of the standard S, and 8' 8' indicate
lock-nuts applied to the rod r on the outer side of the screw-nut 8, for securing the
latter in position after it has been adjusted. The screw-nuts 81 are also employed
for forming a stop on the screw-threaded rod r, whereby the inward movement of
the rod is limited, either in such manner as to arrest its movement before the
rollers come in contact with each other, or so that the movable roller B' is arrested
in its movement toward the stationary roller B at a certain point of adjustment,
thereby enabling the operator to return the rollers to this predetermined adjustment
when the rollers have been separated. By moving the upper end of the lever R
outwardly the rollers are separated, and by a reverse movement of the lever the
rollers are permitted to approach each other. A separate adjusting device is
provided for each pair of boxes at each end of the rollers, and by adjusting the
rollers at one end only, the space between the working-faces near that end can be
increased or lessened without materially affecting or altering the position of the
working-faces at the opposite end of the rollers. The gradually decreasing spaces
between the working-faces of the different pairs of sections of the rollers provide
for the relative adjustment of the different reductions, and the adjustment of the
roller B with reference to the roller B enables the reductions to be adapted to the
varying conditions of the grain whether hard or soft, dry or damp, or otherwise.
T indicates a driving-pulley mounted on the shaft of the roller B, and T¹
indicates a driving pulley mounted on the shaft of the roller B¹. The pulley T' is
made somewhat larger in diameter than the pulley T, so that the rollers revolve
with different peripheral rates of speed, Any other suitable driving mechanism
whereby the desired relative motion of the rollers is attained may however, be
used if preferred
The grain to be reduced is delivered into the first compartment of the feed-
hopper above the first pair of sections 6 and in passing between these sections it is
coarsely cracked. The material derived from the first reduction is delivered from
the head of the first sieve G, and passing over the same, is separated thereby
according to fineness, the fine material passing through the meshes of the sieve,
while the coarse material escapes over the tail of the sieve G and passes into the
foot of the first elevator M. The sieves G, G³, G' are so clothed that the fragments

page_text: of the flour-producing portions of the grain pass through the meshes of the sieve,
while the bran or coarse fragments escape over the tail end thereof. The elevator M
delivers the coarse material derived from the first separation into the second
compartment of the feed-hopper, above the second pair of sections b¹, from which
it passes between the said sections whereby the material is further reduced. The
product of the second reduction is delivered upon the head of the second sieve G',
which again effects a separation of the finer material from the bran and material
adhering thereto, the finer material passing through the meshes of the sieve, and
the bran and material adhering thereto passing over the tail into the foot of the
second elevator M', by which the material is delivered into the third compartment
of the feed-hopper above the third pair of sections b. The material is now further
reduced between the third pair of sections, and the product of this reduction is
delivered upon the third sieve G³, which effects a third separation of the fine
material and the coarse residue, and this operation repeated as many times as
there are pairs of sections on the same pair of rollers. The fine material which
passes through-the meshes of the separating-sieves G, G1, G2, and which consists
of fragments of the flour-producing parts of the grain, falls upon the inclined
tight bottom and is delivered by the same into the receptacle L, from which it is
conducted to such other machines as may be desirable or necessary to produce the
desired ultimate product. The coarse material derived from the last separation,
and which consists of bran deprived of the Bour-producing parts of the grain, is
discharged from the tail end of the last separating-sieve and conveyed to any
suitable receptacle
Instead of shaking-sieves, revolving or other suitable screens may be employed
for separating the products of the several reductions, if preferred. The first pair
of sections of the rollers, whereby the first reduction is effected, may be constructed
with smooth working-faces; but I prefer to employ a coarse dress on these sections,
as it gives better results.
The improved roller-mill is especially adapted to be used in small mills, as it
combines in one machine all the advantages of a train or set of roller-mills. It is
very simple in construction, and occupies but little space, It is easily managed
and constructed at comparatively small expense, considering its capacity, and it is
operated with less power than a corresponding number of rollers of the same
capacity.
Having thus fully described the said invention as communicated to me by my
foreign Correspondents, and the manner of performing thes ame, I wish it understood
that I claim.
First. The combination of a pair of rollers, each composed of several sections
having the working-faces more closely approaching each other and increasing in
length in the several successive pairs of sections, a separate feed and discharge
compartment, and a separate sifting device for each pair of sections, substantially
as set forth.
Second. The combination of a pair of rollers, each composed of several sections
having the working-faces more closely approaching each other in the several
successive pairs of sections, a separate feed and discharge compartment for each
pair of sections, means whereby a differential peripheral rate of speed is imparted
to the rollers, and a separate sifting device for each pair of sections, substantially
as set forth.
Third. The combination of a pair of rollers, each composed of several sections
having the working-faces more closely approaching each other and increasing in
length in the several successive pairs of sections, and a separate feed and discharge
compartment for each pair of sections, substantially as set forth.
Fourth. The combination, of a pair of rollers, each composed of several sections
having the working-faces more closely approaching each other in the several
successive pairs of sections, means whereby a differential rate of speed is imparteḍ
to the rollers, a separate feed and discharge compartment for each pair of sections,
means whereby the spaces between the working-faces of the several pairs of

page_text: sections can be increased or reduced, and a separate sifting device for each pair of
sections, substantially as set forth.
Fifth. The combination of a pair of rollers, each composed of several sections
having their working-faces more closely approaching each other and increasing in
length in the several successive pairs of sections, a separate feed and discharge com-
partment for each pair of sections, and separating-sieves corresponding in number
with the several pairs of sections and increasing in width as the sections increase
in length, substantially as set forth.
Sixth. The combination of a pair of rollers, each composed of several sections
having the working-faces more closely approaching each other in the several
successive pairs of sections, means whereby a differential rate of speed is imparted
to the rollers, a separate feed and discharge compartment for each pair of sections,
separators whereby the product from each pair of sections is separately sifted, and
an elevator whereby the coarse product of each separation is delivered to the
next following pair of roller-sections, substantially as set forth.
Seventh. The combination of a pair of rollers, each composed of several sections
having the working-faces more closely approaching each other in the several
successive pairs of sections, means whereby a differential rate of speed is imparted
to the rollers, a separate feed and discharge compartment for each pair of sections,
separators whereby the product from each pair of sections is separately sifted, an
elevator whereby the coarse product of each separation is delivered to the next
following pair of roller-sections, and means whereby the coarse residue of the last
separation is separately discharged, substantially as set forth:
Eighth. The combination, with the rollers B, B' and journal-boxes N, O, of the
levers R, the screw-threaded rods r, the standards S, the screw-nuts 8, and springs q,
substantially as set forth.
In witness whereof I the said Henry Harris Lake, have hereunto set my
hand and seal this Twenty seventh day of July in the year of Our Lord One
thousand eight hundred and eighty three.
HANDY UT AZE
TIENDV ΠΙΑΤΕ
YATIYAT
(IS.)