and Separating Animal, Vegetable, and Mineral Substances.
Year: 1888

page_text: ppw
and Separating Animal, Vegetable, and Mineral Substances.
We, WILLIAM HENRY THOMPSON, of Church Lane, Old Charlton, in the county of
Kent, Engineer, HERBERT EDGELL HUNT, of Blomfield House, New Broad Street,
in the City of London, Civil Engineer, and CHARLES WILLIAM KITTO, of Lordship
Road, Stoke Newington, in the county of Middlesex, Patentee, do hereby declare the
nature of this invention to be as follows:-
Our invention has for object improvements on apparatus described in the specifica-
tion of Letters Patent granted to one of us W. H. Thompson (dated and numbered
respectively as follows No. 4325 A.D. 1876 and No. 12560 A.1). 1884) and has
reference principally to the modification and improved arrangement of that part or
parts of the apparatus employed for separating the powder pulp or pulverized sub-
stances and to arranging or combining the said apparatus with the crushing or
grinding Mill so as to effect a more rapid and efficient working and in such a manner
as to render the interior and the working parts of the said Mill and separating or
sifting apparatus readily accessible. The invention further las reference to arrange-
ments for the better adjustment and protection of and more immediate access to the
wearing and bearing surfaces and for reducing the weight and parts of the Mill
rendering it more convenient and less costly in transport.
According to our invention we employ a Mill preferably of similar design and
arrangement to that shewn in Sheet 1 of the drawings of the specification of the
aforesaid Patent No. 12560 A.D. 1884 or any suitable modification of such Mill,
as will admit of its combination with sifting or separating apparatus as hereinafter
mentioned; in such modification we arrange the structure or casing of the Mill so as
to admit of the addition or application of propelling blades (similar to those described
in the specification of the aforesaid Patent No. 4325 A.D. 1876) to one or both
driving discs for the purpose of retaining the substance to be pulverized under the
action of the ball until reduced sufficiently fine for sifting and then for propelling it
from the Mill into the sifting apparatus. This sifting apparatus is or may be provided

page_text: with suitable Conveyors or mechanism for moving or depositing into suitable
receptacles the finely pulverized substance that has passed the meshes of the screen
The
and also the coarser particles or tailings which have not passed the said screen.
sifting apparatus with its mechanism is mounted on wheels (which may be provided
with suitable springs for facilitating vibration to the screens imparted by the motion
of the mill bearing or running on a Tramway or other suitable surface so as to be
moveable (as hereinafter mentioned) and is properly encased, so as to prevent the
escape of the powder or pulverized substance except through the proper openings or
passages provided for the purpose. One end of the said casing is so constructed and
arranged as to admit of its being easily connected to and forming a union with the
casing of the mill aforesaid and by such a connection make an effective combination
of the mill and sifting apparatus; the sifting apparatus receiving its motion from a
convenient moving part of the mill-through the medium of spur wheels or other
suitable mechanism-for rapidly gearing with and imparting the required movement
to the screen or screens conveyers and sifting apparatus mechanism. The object of
mounting the sifting apparatus on wheels or a wheeled carriage is that it may be
readily moved apart from the mill so as to leave the latter and sifting apparatus
perfectly accessible for adjustment repair and renewal or change of screens or sifting
apparatus, which apparatus is held to the mill by such an arrangement of bolts or
couplings as will admit of its being rapidly disconnected or replaced; or the connection
between the mill and the sifting apparatus may be such (for example by the use of
springs or other suitable flexible connections) as to facilitate transmission of the vibra-
tory motion caused by the working-of_the_mill to the sifting apparatus-Or to this
end special mechanism may be adopted.
According to a modification, the aforesaid sifting apparatus may be traversed on a
slide or connected to the Mill by a hinged joint so as to admit of its being radiated
from the Mill for access to the working parts and it may be arranged to be capable
of taking a position at any suitable angle with the mill as circumstances may
require.
When the powder or pulverized substance has to be drawn or blown from the mill
by an air current, then, instead of arranging the discharge or exit passages as shown
in sheet 1 of the drawings of the specification of the Letters Patent 12560 of 1884
herein before referred to, we arrange the exit passages at or near the top of the mill and
partly cover the side or sides of the mill with a shield or plate terminating at a suitable
distance from the bottom of the mill casing. Another plate is arranged to incline or
extend upward from the bottom of the casing and meet or overlap the shield or plate
at such an angle and in such a manner as to leave a space or aperture through which
the substance to be pulverised can pass into the mill, falling on an inclined plate or
grating by which it is directed on the mill ring or track. The substance is by
preference fed through the space or aperture on to the inclined plate or grating just
referred to by means of a shoot to which a vibratory movement is given by any suit-
able means.
Here it is submitted to the pulverizing action of the ball and when
sufficiently reduced is carried from the mill and deposited into suitable receptacles by
an air current drawn through the said aperture or grating (or through other suitable
inlets arranged for in the construction of the mill casing) in an upward direction and
out of the mill. The said shield or plate may be formed with an upward exit channel
for connecting with the exhaust fan or blower and may be moveable and suitably
balanced and so arranged as to regulate the air current.
In the process of wet grinding or pulverisation instead of employing screens (as
shown in sheet 2 of the specification of the Letters Patent 12560 of 1884 herein-
before referred to) for regulating the size of the pulverised substance or pulp leaving
the mill, we arrange or form the mill with a casing on one or both sides and a
suitable reservoir or tank, the object of the arrangement being to retain the pulp or
substance under treatment in the mill until it is reduced to the required fineness, or to
such a degree as to be kept in suspension (in the water with which the aforesaid reservoir
or tank is charged) by the agitation resulting from the working or movement of the
When reduced sufficiently fine the fleating particles are caused to flow over or
will.

page_text: out through suitable apertures in the tank or reservoir in quantity regulated by the
rate of introduction of water into the said tank. The water may flow through the
water case bearing with which the mill is fitted or may come from any other suitable
source. Several tanks or receptacles may be employed the arrangement being such
that the coarser particles remaining in suspension will settle first and the lighter
particles will flow over into the next tank.
With mills for wet grinding we may to suit certain heavy or plastic substances
substitute for the feeding hopper means such as a vessel provided with vanes or blades
attached to a rotating shaft, for continuously feeding or forcing the material into the
grinding mill.
Driving discs may be faced or provided with renewable wearing surfaces which may
be secured by bolts or other suitable means.
In order to reduce the cost and facilitate the transport, by reducing the weight of
the mill we design the parts in such a manner that when they are erected a part or
parts of the structure may be formed of a concrete or other wall composed where
practicable perferably of materials to be found near site of erection of mill. To effect
such combination wo form the outer casing containing the wearing track or ball path
with a suitable flange in such a manner that the said casing can be bolted or set up to
a wall formed with an aperture or wall box in which is arranged a water cased or other
suitable bearing supporting the end of the mill shaft. This shaft projects beyond or
overhangs the said bearing and carries the driving discs which impart motion to the
ball in the manner described in the aforesaid specification of Patent No. 12,560 A.D.
1884. The bearing supporting the other end of the mill shaft is mounted in its proper
position on a suitably raised wall or pillar, except when it is desired to form a
duplex mill when both ends of the shaft and the mill casing are arranged each on a
wall in a similar manner. Or in lieu of securing the mill case to a wall as set forth
the shaft carrying the driving discs may be carried in bearings supported upon walls
or pillars of concrete or other suitable material.
In order to be able to adjust the ball of the grinding mill into centre of its path or
track, the end of the mill shaft overhanging the main bearing is provided with a
movable sleeve on which is arranged the dome bearings, rubber washers or packings
and driving discs. The said sleeve is formed at one or the inner end with a shoulder
against which the dome bearings carrying the discs are set by means of a nut (herein-
after called the sleeve nut) working on a screw formed on the outer end of the
sleeve the movement of which nut acts so as to relax or compress the rubber washers
or packings between the two driving discs and so set them at the requisite distance
apart as to keep them in frictional contact with the pulverising ball, and in order to
move the sleeve carrying the two driving discs so as to keep the ball in proper
relation with the ball track or mill ring the aforesaid sleeve is connected with the
mill shaft by means of a screw socket or socket nut so arranged as to project
through and admit of its movement in the bore of the aforesaid sleeve nut which
is chambered or recessed to receive the head of the socket nut which is formed with
a shoulder provided for the purpose of being set up against the recess in the sleeve
nut by another nut arranged on the said socket nut and acting on the outer surface
of the sleeve nut so as to hold the said socket nut fast to it. The bore of the said
socket nut is formed with a thread fitting on a screw cut on the end of the mill shaft,
and thereby connecting the sleeve with the end of the said shaft in such a manner as
to admit of the adjustment of the sleeve by slackening out the aforesaid nut which
holds the socket nut to the sleeve nut and turning the socket nut so as to cause it to
traverse the screw and move the sleeve in the direction in which the driving discs
require to be moved and which are held in the required position by again setting
the head of the socket nut up against the sleeve nut in the manner aforesaid. Or
according to another arrangement, the dome bearings carrying the discs and
having the alternate sheets of metal and elastic material between them are arranged
upon the overhanging end of a shaft which is provided with a collar or flange against
which the dome bearings are set up by nuts screwed on to the end of the shaft.
The shaft is so arranged that an endwise movement may be imparted to it for

page_text: adjusting the position of the driving discs relatively to the ball track. For this
purpose it may
be provided with double screw-threaded portions provided with nuts
between which is a sleeve or bush mounted within a stationary bearing. By
loosening the nuts, the position of the shaft and discs may be adjusted according
to requirement, the nuts being afterwards tightened up to maintain the shaft in the
adjusted position. Lock nuts may be used to prevent the said nuts becoming
accidentally loose.
It will be obvious that some of our improvements may be used either separately
or not.

page_text: Improvements in Machinery or Apparatus for Grinding, Pulverising,
and Separating Animal, Vegetable, and Mineral Substances.
We, WILLIAM HENRY THOMPSON, of Church Lane, Old Charlton, in the County of
Kent, Engineer, HERBERT EDGELL HUNT, of Blomfield House, New Broad Street, in
the City of London, Civil Engineer, and CHARLES WILLIAM KITTO of Lordship Road,
Stoke Newington, in the County of Middlesex, Patentee, do hereby declare the nature
of this invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
Our invention has for object improvements in apparatus described in the speci-
fications of Letters Patent granted to one of us viz.-W. H. Thompson (dated and
numbered respectively as follows No. 4325 A.D. 1876, and No. 12560 A.D. 1884)
and has reference principally to the modification and improved arrangement of that
part or parts of the apparatus employed for separating the powder, pulp, or pulverized
substances, and to so arranging or combining the said apparatus with the crushing or
grinding mill so as to effect a more rapid and efficient working, and to render the
interior and the working parts of the said mill and separating or sifting apparatus
readily accessible. The invention further has reference to arrangements for the
renewal, and for the better adjustment and protection of and more immediate access
to the wearing and bearing surfaces.
According to this invention we employ a mill preferably of similar design and
arrangement to that shewn in sheet 1 of the drawings of the specification of the
aforesaid Patent No. 12560 A.D. 1884 or any suitable modification of such mill, as
will admit of its combination with sifting or separating apparatus as hereinafter
mentioned; in such modification we arrange the structure or casing of the mill, so as
to admit of the addition or application of propelling blades (similar to those described
in the specification of the aforesaid patent No. 4325 A.D. 1876) to one or both driving
discs, for the purpose of retaining the substance to be pulverized, under the action
of the ball, until reduced sufficiently fine for sifting, and then for propelling it from
the mill into the sifting apparatus. This sifting apparatus is or may be provided with
suitable conveyors or mechanism for moving or depositing into suitable receptacles,
the finely pulverized substance that has passed the ineshes of the screen, and also the
coarser particles or tailings which have not passed the screen. The sifting apparatus
with its mechanism is mounted on wheels, which may be provided with suitable springs
for facilitating the transmission of the vibration of the mill to the screens. The
wheels bear or run on a tramway or other suitable surface so as to be moveable (as
hereinafter mentioned). The sifting apparatus is suitably encased, so as to prevent
the escape of the powder or pulverized substance except through the proper openings
or passages provided for the purpose. One end, side, or part of the said casing is so
constructed and arranged as to admit of the sifting apparatus being easily connected
to it so as to make an effective combination of the mill and sifting apparatus.
Toothed gearing or other suitable mechanism, driven from a moving part of the mill,

page_text: is employed for imparting the required movements to the screen or screens, conveyers,
and sifting apparatus. The object of mounting the sifting apparatus on wheels, or a
wheeled carriage, is that it may be readily moved apart from the mill so as to leave
the latter and sifting apparatus perfectly accessible for adjustment repair and renewal
or change of screens or sifting apparatus, which apparatus is held to the mill by
such an arrangement of bolts or couplings as will admit of its being rapidly dis-
connected or replaced; or the connection between the mill and the sifting apparatus
may be such (for example by the use of springs or other suitable flexible connections)
as to facilitate the transmission of the vibratory motion of the mill (caused by
its working) to the sifting apparatus. Or to this end special mechanism may bo
adopted.
In the accompanying drawings-
Fig. 1 is a vertical section, and
Fig. 2 a plan or top view partly in section of apparatus constructed according to
this part of the invention.
1 is a part of the mill casing to one part 1 of which the sifting apparatus is applied.
This sifting apparatus comprises an inclined cylindrical sieve 2 fixed upon a shaft 3
that is mounted to rotate within a casing 4. The casing 4 which forms a carriage is
provided with wheels 6 arranged to travel on rails 7 in order that the apparatus may
be moved up to, or away from the side of the mill. S is a slotted hasp or coupling
pivotted to the casing 4 at 9, and 10 is an eye fixed to the mill casing, to which the
hasp or coupling can be readily secured by a cotter when the sifting apparatus is to
be secured to the mill in order to form-a-union-therewith, or from which such apparatus
can be quickly disconnected when necessary. 11 is a part of the mill casing that
extends into the sieve 2, when the mill and sifting apparatus are secured together as
shewn in fig. 1; and through which powdered material is fed into the sieve when
the mill is at work; the casing 4 is then in close contact or union with the mill. 12 is
a screw conveyer located in the lower part of the casing 4 and adapted to convey the
powdered material that has passed through the meshes of the screen, into a
receptacle 13. 14 is an inclined shoot carried by the casing and through which
powdered material that is not sufficiently fine to pass through the meshes of the sieve
escapes into another receptacle 15. The shaft 3 is driven at the desired speed from
a sprocket wheel 16 on the driving shaft of the mill by an endless chain 16ª, sprocket
wheel 17, shaft. 18, bevel wheels 19 and 20, shaft 21, sprocket wheel 22, endless
chain 23 and the sprocket wheel 24 which latter is secured on the said shaft 3.
The conveyer shaft is provided with a sprocket wheel 25 by which it is driven
from a similar wheel on the shaft 3 through an endless chain 26. The end of the
shaft 21 adjacent to the bevel wheels 19 and 20 is made square at 27 and arranged to
freely enter or leave a correspondingly formed hole in the adjacent end of the spindle
carrying the bevel wheel 20. This construction admits of the casing 4 which carries
the said shaft 21 being readily moved away from the mill when the hasp or coupling 8
is disconnected from the eye 10.
According to a modification, the sifting apparatus may be traversed on a slide; or
it may be connected to the mill casing by a hinged joint so as to admit of its being
radiated from the mill, as shown diagrammatically in Fig. 3 for gaining access to the
working parts; and it may also be so arranged as to be capable of taking a position at
any suitable angle with the mill as circumstances may require, as will be readily
understood from the foregoing description.
The casing 4 of the sifting apparatus may be connected to the mill by a telescopic
or flexible joint 4 and be vibrated longitudinally by cranks 4° and connecting rods 4°
as indicated in Fig. 3, the cranks being driven in any convenient manner from a
moving part of the mill as shown.
When the powder or pulverized substance has to be drawn or blown from the
mill by an air current, then, instead of arranging the discharge or exit passages as
shewn in sheet 1 of the drawings of the specification of the Letters Patent 12560
of 1884 herein before referred to, we arrange the exit passages at or near the top of
the mill and partly cover the side or sides of the mill with a shield or plate terminating

page_text: at a suitable distance from the bottom of the mill casing. This arrangement is shewn
in Figs. 4 and 5 which are respectively a vertical sectional and a sectional plan of so
much of a mill as is necessary to illustrate this part of the invention. 28 is one of
the exit pipes at the top of the mill, and 29 is a shield or plate at the side thereof.
29 is another plate arranged to incline or extend upward from the bottom of the
casing at such an angle and in such a manner as to leave spaces or apertures at 31
through which the substance to be pulverised can pass into the mill 1, falling on
an inclined plate or grating 32, by which it is directed onto the mill ring or
track 33.
The substance is by preference fed through the spaces or apertures on to the
inclined plate or grating by means of a shoot 34 suspended by a chain 34ª to which
a vibrating movement is given by any suitable means. The inner end of the shoot is
supported by the inclined plate 29. 35 is a right and left handed screw and 36, 36,
correspondingly threaded nuts in the form of hooks for adjusting the height of the
outer end of the shoot to give a suitable fall to the material and facilitate its falling
onto the ball track or ring where it is submitted to the pulverizing action of the ball.
When the material is sufficiently reduced, it is carried from the mill and deposited
into suitable receptacles by an air current drawn through the apertures at 31 er
through a grating 37 and grating 32 (or through other suitable inlets arranged for
in the construction of the mill casing) the air current passing in an upward direction
through the exit passage 28 and out of the mill. The shield or plate 29 may be
made movable and be counterbalanced by a weight 29° in order that it may be readily
raised for the purpose of admitting air under its lower edge and for regulating the
amount of air so admitted. In lieu of the exit passages 28 in the top of the mill
casing the shield or plate may be formed with an upward exit channel 28" as shown
in dotted lines in Fig. 4 adapted to be connected with the exhaust fan or
blower.
In the process of wet grinding or pulverisation instead of employing screens (as
shewn in sheet 2 of the specification of the Letters Patent 12560 of 1884 herein-
before referred to) for regulating the size of the pulverised substance or pulp leaving
the mill, we arrange or form the mill at one or both sides with a casing constructed
to form a reservoir or tank, the object of the arrangement being to retain the pulp or
substance under treatment in the mill until it is reduced to the required fineness or to
such a degree as to be kept in suspension (in the water with which the aforesaid
reservoir or tank is charged) by the agitation resulting from the working or movement
of the mill.
This construction is shown partly in elevation and partly in vertical section in
figs. 6 and 7 which are views at right angles to each other. 38, 38, are casings
secured to the sides of the mill with which they form a reservoir or tank.
When the material is reduced sufficiently fine the floating particles are caused to
flow over or out through suitable apertures or spouts 39 in the tank or reservoir 38
in quantity regulated by the rate of introduction of water into the said tank. The
water may flow through the water case bearings 40 with which the mill is fitted in
order to prevent escape of grit or ground material to the bearings 41: or the water
may be otherwise introduced into the tank 38 if desired. 38 is a baffle plate.
Several tanks or receptacles 42 may be employed as shown in fig. 7 the arrangement
being such that one discharges into the other and so that the coarser particles carried
over in suspension from the tank 38 will settle first and the lighter particles
will flow over into the next tank or tanks.
With mills for wet grinding we may to suit certain heavy or plastic substances
substitute for the feeding hopper usually employed, means such as a vessel 43 (Fig. 6)
provided with vanes or blades 44 attached to a vertical rotating shaft 45, for
continuously feeding or forcing the material into the grinding mill.
The shaft 45 is provided with a worm wheel 46 which is driven by a worm on a
shaft 47 that receives motion from a driving pulley 48 on the mill shaft.
The driving discs 49 for forcing the ball to rotate on the mill ring or ball track 33
may be faced or provided with renewable wearing surfaces or plates 52 as shown in

page_text: vertical section in Fig. 8 and in elevation in fig. 9 which represents part of each of
its two sides. These plates may be secured in place by bolts 53 or by other suitable
means.
In order to adjust the ball of the grinding mill to the centre of its path or track,
the end of the mill shaft 54 overhanging the main bearing may as shown in vertical
section in fig. 10, be provided with a moveable sleeve 55 on which are arranged the
dome bearings 56. 56, carrying the driving discs 49, and the alternately arranged
discs of india rubber and metal 57. The sleeve 55 is formed at the inner
end with a shoulder 58 against which the inner dome bearing 56 is set by
means of a nut 59 (hereinafter called the sleeve nut) that works on a screw
formed on the outer end of the sleeve at 60. 61 is a socket nut arranged
to work on a screw threaded part 54 of the mill shaft 54 and to project into the
bore of the sleeve nut 59 where it is provided with a shoulder or collar 62 that can be
set up against the inner side of a flange 63 on the sleeve nut by another nut 64.
This nut 64 works on the socket nut and acts against the outer surface of the
sleeve nut.
With this construction by turning the sleeve nut 59 it is caused to relax or compress
(according to the direction in which it is turned) the rubber washers and packings
between the two driving discs and thus to set these discs at the requisite distance
apart to keep them in frictional contact with the pulverising ball. To move the
sleeve 55 endwise in order to adjust the ball in proper relation with the mill ring or
ball track the nut 64 is slackened out and the socket nut 61 turned so as to cause it to
traverse the screw 54 on the mill shaft and move the sleeve in the direction in which
the driving discs require to be moved. These discs are then held in their adjusted-
positions by again setting up the nut 64 and the shoulder or collar of the socket nut
against the opposite sides of the flange 63 of the sleeve nut.
Or according to another arrangement, shown in longitudinal vertical section in
fig. 11, the dome bearings 56, 56 carrying the discs and having the alternate sheets
of metal and elastic material between them, are arranged upon the overhanging end
of the mill shaft which is provided with a collar or shoulder 65 against which the
dome bearings are set up by nuts 66 screwed on to the end of the said shaft. The
shaft is so arranged that an end wise movement may be imparted to it for adjusting the
position of the driving discs relatively to the ball track. For this purpose it may be
provided with double screw threaded portions 66 provided with nuts 67 between which
is a sleeve or bush 68 mounted within a stationary bearing 69. By loosening the
nuts 67, the position of the shaft and discs may be adjusted according to requirement,
the nuts being afterwards tightened up to maintain the shaft in the adjusted
position. Lock nuts 70 may be used to prevent the nuts 67 becoming accidentally
loose. It will be obvious that some of our improvements may be used either separately
or not.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is :-
1. In machinery or apparatus for grinding, pulverizing and separating mineral and
other substances, the combination with a grinding or pulverizing mill, whether of the
kind herein referred to in which the grinding or pulverising is effected by a ball
impelled around a path or track by driving discs, or of other suitable construction, of
sifting apparatus mounted upon a carriage adapted to be moved up to and away from
the mill casing and of being readily secured thereto or disconnected therefrom
substantially in the manner and for the purposes herein before set forth.
2. The improved combination and arrangement of grinding mill and sifting
apparatus, constructed arranged and operating substantially as herein before described
with reference to figs. 1 and 2 of the drawings annexed, or modified as shown in fig. 3
or in fig. 3ª.
3. Constructing a grinding mill of the kind herein referred to with shields or
plates such as 29 and 29ª so relatively arranged as to leave an opening or openings
between them through which material is fed from an inclined shoot onto the ball track

page_text: or path substantially as hereinbefore described with reference to figs. 4 and 5, whether
the outlet for air and powdered material be at the top of the mill casing or in the
shield or plate 29 and whether this shield or plate be adjustable or not for the purpose
mentioned.
4. In a mill of the kind herein before referred to and provided with water bearings
as set forth, constructing the mill case substantially as shown in Figs. 6 and 7 to serve
as a water tank in which the powdered material is held in suspension and combining
with such mill one or more settling tanks substantially as hereinbefore described for
the purpose set forth.
5. In a grinding mill of the kind herein referred to, constructing the driving discs
with renewable wearing surfaces or plates 52 substantially as hereinbefore described
with reference to fig. 8 & 9 of the drawings annexed.
6. The improved constructions combinations and arrangements of parts for adjusting
the positions of the driving discs of a mill of the kind herein referred relatively to
the ball track or ring substantially as hereinbefore described with reference respectively
to and illustrated in fig. 10, and in fig. 11 of the drawings annexed.
Dated is oru uay of Decento 1000.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicants.