Improvements in Machinery or Apparatus for Grinding and Crushing.
Year: 1891

page_text: Date of Application, 30th Apr., 1891
Complete Specification Lett, 1st Feb., 1892-Accepted, 23rd Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Grinding and
Crushing.
WILSON ROBERT HARLAND of 53 St. James Square Kensington Middlesex
Mechanical Engineer do hereby declare the nature of this invention to be as
follows:-
This invention relates first to improvements in that class of mill or machine in
which a crushing ball is employed and operated by a pair of flexible discs or face
plates, in connection with fixed or moveable tracks or paths:
Heretofore the balls of this class of mill or machine, when operated by flexible
discs moving on clutches fixed on and revolving with the shaft, have been found to
wear away unevenly due to the discs seizing the ball, thus setting up considerable
friction, but according to my present improvement I place each disc or face plate
on a separate shaft and cause one to revolve a little more quickly than the other,
thus bringing a different part of the ball in contact with the path and discs or face
plates at each revolution thus forming a gyrating action: I do not confine myself
to this particular method I can obtain a similar result by having one angle on one
disc and a different angle on the other: nor do I confine myself to either of these
methods, I can effect the same action by having one disc or face plate on the
shaft and revolve the other on a sleeve or collar, or 1 may place both discs or
sleeves or collars running on and with the shaft, with provision for gearing up one
to run a little quicker than the other.
Another part of my improvement relates to adjusting automatically & continuously
the wear and tear that takes place both on discs or face plates and the ball; the
practice is, in this class of machine at the present day to adjust by means of nuts
on the shaft which are always in the dust, and in constant use; owing to the great
wear that takes place more on the disc and clutch drivers than the ball, the threads
of these nuts are a constant source of trouble wearing away and stripping the latter
due more to the side thrust of the discs: In my improvement I automatically
adjust the discs or face plates and employ as before mentioned two shafts, at the
end of each I place a collar or sleeve, against a collar or shoulder on the shaft
operated by a system of rods cranks and levers balanced by a weight or spring;
the discs which are mounted on the said collar or sleeve, being so set to act with
just sufficient pressure to pick up and keep the ball impelled round the path or track,
as the wear takes place on the ball or discs and face plates so they come together
automatically and continuously. I do not confine myself to one system of rods
cranks levers balance weight or weights or springs, I may employ a pressure to
act equally on either shaft, but in either case, to be of practical use they must be
connected together: I do not confine myself to two shafts I may employ one shaft
working within another hollow shaft or sleeve the two working in one bearing as
for example the hour and minute hands of a clock, the object of either of the
foregoing arrangements is to give the ball a twisting action: to the aforesaid rods
cranks weights or springs I attach governors to act in such a manner that until the
aforesaid discs or face plates, being balanced have attained their right velocity they
will not come into frictional contact with the ball, the same governors also control
the feeding apparatus but I provide for stopping this at will.
Another part of my improvement relates to the discs or face plates: the arrange-
ment in use at the present day, are simply frictional clutches with paws engaging
recesses in the discs, and as before mentioned, the excessive wear that takes
place, causes both discs and clutches to wear away, before the surfaces in contact
with the ball have had sufficient time to wear down, the two then become as a solid

page_text: piece of metal, and the ball on rising, tending to part the discs thus bringing
excessive strains on the threads which strip off: in my improvement I make my
discs or face plates separate and do away with the frictional clutch drivers, and
provide a boss or sleeve fitting on the collar or sleeve before mentioned on the end
or ends of the shaft or shafts and between this boss-in which are holes for pins-
and the discs or face plates I place spiral springs forming spokes, but I do not
confine myself to this form I may cast or otherwise form the boss and sides solid
with the face plates separate between which I place a series of springs: I do not
confine myself to this form I may make my face plates or discs duplicate or double
by bolting a pair back to back, with springs and a boss, after the fashion of a wheel
I do not confine myself to spiral springs: I may use flat or curved springs, and I.
may make my bosses in the form of collars and washers.
Another part of my invention has reference to the path or track, on which the
greater part of the crushing is done in the present construction of mill with a
vertical path, it is found that the wear is uneven, and in places "wavey" this not
only very seriously interferes with the output of the mill, but is a source of trouble;
much valuable time is lost in turning round a path, as it has been found necessary
to do and in consequence of their being fitted in so tightly they are much neglected,
thus the path is rendered useless before its time in my improvement I place the
path on a bed or foundation preferably of rollers, so that it is free to turn round
due to the motion imparted to it by the ball rolling against the path in contact
with the discs and revolved by the shaft; all turning round but at different speeds:
the parts thus present new surfaces at each revolution I do not confine myself to
this particular method I may mount the casing containing the path, on rollers, as in
the case of the revolving furnaces or cylinders; or I may form a rack in the path,
or attach a rack to it and worm it round by a worm. In one arrangement I should
make my machine with a horizontal path.
Another part of my invention relates to a mill or machine having a vertical shaft,
horizontal path, discs &c. so as to effect a more equal distribution of the material to
be ground on the path or track and to reduce the wear before mentioned, I provide
a pan; which may or may not be the bottom, fixed to the vertical shaft, so as to
get a more uniform feed by centrifugal force as the sizes increase so the speed of
the machine decreases and to meet the case I provide a collar or sleeve fitted to the
shaft and cause the pan to turn round on it to obtain sufficient force to effect my
purpose I provide gearing to drive it. I also place in the pan the path or track,
but do not compel myself to do this, I may place the path in a separate or outer
casing, as the speed of the inner pan will be too great for to revolve the path: the
sides of the outer casing are covered with perforated plates or gauze: the material
being fed into the mill falls to the bottom of the pan or casing and by the centrifugal
force imparted to it, by the vertical shaft it evenly distributes the material over the
path. I do not confine myself to plates or gauze I may make the casing with
shoots to which I employ a fan to draw off the ground material: Another part of
my invention has reference to the construction of a carriage or slide: in mills of
the present form should it be required to see the interior, much time is wasted, in
removing nuts side screens, water bearing, stuffing box, discs &c. when replacing a
ball or if the mill becomes choked from over feeding, which is often the case: in
my improvement I form the bearings carrying the shaft or shafts with the disc or
discs and necessary rods, cranks levers weights, feed gear, screens &c. on a carriage
mounted on wheels, running on rails, or sliding on a suitable surface operated in
either case by a screen, lever, rack and pinion, or other gear: by these means if it
be required to get to the inside the carriage or slide is run back and in a few
moments the interior is exposed to view.
Another part of my invention relates to the provision for catching gold "inside"
the machine or mill in the present arrangement, the pulp is retained within the mill
until ground sufficiently fine to pass a certain mesh and to do this, a greater
portion is reduced to a still finer mesh, before it can pass the grids or gauze and as
a consequence passes away on the surface of the water as "float gold : to prevent

page_text: his loss I provide amalgamating plates of copper on the inside of the screens,
connected up in series or circuit, and a current of electricity passed through them
either by a dynamo worked off the machine or mill or by other suitable means such
as a battery: the free gold is thus collected within the mill, and any portion that
may be in the pulp is arrested before passing the gauze or plates: I do not confine.
myself to vertical screens alone, the same arrangement may be applied to a
horizontal machine.
Another part of my invention, I provide for the removal of steel-as in the case of
grinding basic slag-that may enter the mill or machine, which in practice prevents
the ball acting properly, besides causing undue wear to the working parts; in my
improvement I provide a maguct or series of magnets, forming a ring or rings
revolving round within the body of the mill or machine charged by means of a
current made to pass through, and broken by commutators, at any convenient spot,
to discharge the metal into a receptacle which by preference is placed on the
outside. I do not confine myself to a ring or rings placed in a vertical position I
may employ a similar ring of magnets revolving in a horizontal position in the
before mentioned pan or casing the centrifugal force will throw the material to be
ground on the path the ball catching it, will crush the slag, and free the steel,.
which will fall and be caught, to again ascend.
Another part of my improvements relates to the packing to prevent the grit
getting to the main bearings: in the gland form now in use considerable loss of time
fakes place in making & breaking the joint, and to the wear by friction necessary
to keep it tight, which consequently gives much trouble, in my improvement I
provide a metallic packing ring-with a tongue piece-of such section and area,
that the pressure of water inside the mill is sufficient to force the ring inwards
within the gland, and around the shaft, I may make the rings in halves with tongue
pieces at the joints.
Another part of my
invention provides for the removal of the great vibration due
to the working of the mill, which adds largely to its destruction, to remove this
evil, I mount the mill or machine, or the parts so effected, on springs, as for
example a locomotive.
:
Another part of my improvement consists of providing a rack on the fly-wheel or
pulley In the larger mills of this description, it very often happens that the shaft
is required to be turned round more especially when at starting this takes several
hands to move it: In my improvement I provide a rack on the fly wheel in which
engages a pawl, at the end of a lever preferably so made to send the rack back-
wards or forwards: I do not confine myself to a lever I may provide suitable
gearing so arranged to disengage after starting by this means one person may with
ease move the shaft round: I may also provide "tommy holes" in the periphery of
the fly wheel in place of the rack.
20th Al 1901
WILSON R. HARLAND.
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Grinding and
Crushing.
WILSON ROBERT HARLAND 53 St. James Square N. Kensington W. Middlesex
Mechanical Engineer 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 :-
This invention relates first to improvements in that class of mill in which
crushing balls are employed and operated by flexible or other discs in connection
with fixed or moveable tracks or paths.
Heretofore, the balls of this class of machine or mill, when operated by discs or
face plates fixed on and revolving with a shaft have been found to wear unevenly,

page_text: owing to the difference in the metal consequently the discs or face plates seize the
ball, and produce undue wear, but, according to my present improvement, I place
each disc or face plate on a separate shaft, and cause one to revolve slightly quicker
than the other, thus bringing a different part of the ball in contact with the path
and discs or face plates at each revolution, forming a gyrating action: I do not
confine myself to this particular method, I can obtain a similar result by having
one angle on one disc, and a different angle on the other, nor do I confine myself
to either of these modes: I can effect the same action by having one disc or face
plate on the shaft, and revolve the other on a sleeve or collar, or I may place both
discs on sleeves or collars running on and with the shaft.
Another part of my improvement relates to adjusting automatically and con-
tinuously, the wear and tear, that takes place both on discs or face plates and the
ball the practice is in this class of mill or machine of the present day, to adjust
by means of nuts on the shaft which are always in the dust, and in constant use,
owing to the great wear that takes place, more on the discs and clutch drivers,
than on the ball, the threads of these nuts are a constant source of trouble wearing
away and stripping, the latter more due to the side thrust. In my improvement I
automatically adjust the discs or face plates, and I employ as before mentioned two
shafts, at the ends of each I place a collar or sleeve, against a collar or shoulder
on the shaft or shafts operated by a system of rods, cranks, and levers, balanced
by a weight or spring, the discs, which are mounted on the said collar or sleeve,
being so set, to act with just sufficient pressure to pick up, and keep the ball
impelled round the path, or track, as the wear takes place on the ball or discs, and
face plates, so they come together, automatically and continuously: I do not
confine myself to one system of rods, cranks, levers, balance weight, or weights, or
springs, I may employ a pressure to act equally on either shaft, but, in either case,
to be of practical use, they must be connected together: I do not confine myself
to two shafts, I may employ one shaft, working within another hollow shaft, or
sleeve, the two working in one bearing, as for example, the hour and minute hands
of a clock, the objects of either of the foregoing arrangements, is to give the
ball, a twisting action to the aforesaid rods, cranks, levers weights or springs I
may attach governors, to act in such a manner, that until the aforesaid discs or
face plates, being balanced, have attained their right velocity, they will not come
into frictional contact with the ball, the same governors also control the feeding
apparatus, but, provide for stopping this at will.
Another part of my improvement, relates to the discs or face plates, the arrange-
ments in use of the present day, are simply frictional clutches, with paws engaging
recesses in the discs, and, as before mentioned, the excessive wear that takes place,
causes both disc and clutch to wear away, before the surfaces in contact, with the
ball, have had sufficient time to wear down, the two then become as a solid piece of
metal, and the ball on rising, tending to part the discs, bring excessive strain on
the threads, which strip off: In my improvements, I make my discs or face plates
separate, and do away with the frictional clutch drivers, and provide a boss or
sleeve, fitting on the shaft, against the collar or shoulder, before mentioned, on the
ends of the shaft or shafts, and between this boss, in which are holes for pins, and
the face plates, I attach spiral springs forming spokes: but, I do not confine
myself to this form, I may cast or otherwise form the boss and sides solid, with the
face plate separate, between which, I place a series of springs. I do not confine
myself to this form, I may make my face plates duplicate, by bolting a pair back
to back, I may employ flat springs, and I may make my bosses, in form of collars,
and washers.
:
Another part of my invention has reference to the path or track, on which the
greater part of the crushing is done in the present construction of mill, with a
vertical path, it is found that the wear is uneven, and in places "wavey," this not
only very seriously interferes with the output of the mill, but is a source of trouble,
and much valuable time is lost, in turning a path, as it has been found necessary to
do, and, in consequence of their being so tightly fitted in, they are much neglected,

page_text: thus the path is rendered useless, before its time: m my
ment, 1 place the
path in a bed or foundation, preferably of rollers, so that it is free to turn round,
due to the motion imparted to it by the ball rolling against it, in contact with the
discs, revolved by the shaft, all turning round, but at different speeds, the parts
thus present new surfaces at each revolution: I do not confine myself to this
particular method, I may mount the casing containing the path, on rollers, as in the
case of the revolving cylinder or furnaces, or, I may form a rack in the path, or
attach a rack to it, and worm it round by a worm: In one arrangement I should
make my machine with a horizontal path."
Another part of my improvement, relates to a mill or machine having a vertical
shaft, horizontal path, discs etc., so as to effect a more equal distribution of the
material to be ground on to the path or track, and to reduce the wear before
mentioned, I provide a pan, which may, or may not, be the bottom, fixed to the
vertical shaft, so as to get a more uniform feed by centrifugal force; in the
ordinary manner, the larger mill, has less speed than the smaller one, and to meet
this case, I provide a collar or sleeve fitted to the shaft, and cause the pan to turn
round on it, to obtain sufficient force to effect my purpose for driving it, I provide
gearing, also place in the pan, the path or track, but do not confine myself
to do so.
I may place the path in a separate, or outer casing, as the speed of the inner
pan will be too great to revolve the path; the sides of the outer periphery of the
mill case proper are covered with perforated plates or gauze: the material being
fed into the mill, falls to the bottom of the pan or casing, and by the centrifugal
force imparted to it, by the vertical shaft, it evenly distributes the material over
the path.
I do not confine myself to plates or gauze, I may make the casing with shoots,
to which I employ a fan to draw off the ground material.
Another part of my invention has reference to a carriage or slide, in mills of
the present form, should it be required to see the interior, much time is wasted in
removing nuts, screens, water bearings, stuffing box, disc etc., or to replace a ball: in
my improvement, I form the bearing or bearings, carrying the shaft or shafts, with
the disc or discs, and necessary rods, cranks, lever, weights, feed gear, screens, etc.,
on a carriage, mounted on wheels, running on rails, or sliding on a suitable surface,
operated by a screw, lever, rack and pinion, or suitable gear; by these means,
should it be required to get to the inside the carriage is run back, and in a few
moments the interior is exposed to view.
66
"
Another part of my invention relates to catching gold," inside the machine
or mill; in the present arrangement, the pulp is retained within the mill until
ground sufficiently fine to pass a certain mesh, and to do this, a greater portion is
reduced to a still finer condition before it can pass through the grids, or gauze,
and, as a consequence, passes away on the surface of the water, as "float gold:
to prevent this loss, I provide amalgamating plates of copper, in the inside of the
screens, connected up in series or circuit, and a current of electricity, passed
through them, either by dynamo worked off the machine, or mill, or by other
suitable means such as a battery: the free gold is thus collected within the mill,
and any portion that may be in the pulp is arrested before passing the gauze, or
plates.
I do not confine myself to vertical screens, the same arrangement may be applied
to a horizontal machine.
Another part of my invention I provide for the removal of steel (as in the case
of grinding basic slag and other similar material) that is fed into the mill or
machine, which in practice prevents the ball from acting properly, besides causing
undue wear to the working parts; in my improvement, I provide a magnet, or
series of magnets, forming a ring, or rings, revolving within the body of the mill,
or machine, charged by means of a current of electricity, made to pass through
the magnets or plates, and broken by switches or commutators at will, and then
discharging the metal at any convenient place into a receptacle, which, by

page_text: preference, is placed on the outside: I do not confine myself to a ring or rings
placed in a vertical position, I may employ a similar ring of magnets, revolving in
a horizontal position, in the before mentioned pan, or casing; the centrifugal force
of the pan will throw the material to be ground on the path, the ball catching it,
will crush the slag, and free the steel which will fall, and be caught in again.
ascending.
Another part of my improvement relates to the packing, to prevent. the grit
getting to the main or other bearings; in the gland form now in use, where
asbestos, leather, or ordinary hemp, packing is used, very considerable.time is lost
in making this joint, as the grit cannot be kept out, it gets into the packing, due to
the pressure of water in the mill, and is cutting away all the time, it has been in
most cases a great trouble. In my improvements I provide a metallic packing ring,
with a tongue piece, of such section and areas, that the pressure of water inside the
mill, is sufficient to force the reduced area of the ring inwards, within the gland,
and the reduced area around the shaft, I may make the ring in halves, with tongue
pieces at the joints.
Another part of my invention provides for the removal of the great vibration
due to the working of the mill, which adds largely to its destruction, to remove this
evil, I mount the mill or machine, or the parts so effected on springs, as for example,
a locomotive.
Another part of my improvement consists of providing a rack on the fly wheel
or pulley, in the larger mills of this description it very often happens that the
shaft is required to be turned round, more especially when at starting, usually
taking several hands to move it.
In my improvement I provide a rack on the fly wheel, in which engages a pawl,
at the end of a lever, preferably so made, to send the rack backwards or
forwards.
I do not confine myself to a lever, I may provide suitable gearing, so arranged
to disengage after starting, by this means, one person may with ease move the
shaft round, or, I may provide "tommy holes" in the periphery of the flywheel in
place of the rack.
"
SHEET 1.
Fig. 1, is a diagram, shewing two discs C and C¹ mounted upon two separate
shafts D and D' driven by the pulley E and E¹: E' is made smaller than E, to
revolve faster, so as to give a twisting or gyrating action to the ball as well as its
ordinary motion following the internal dia. of the path A.
Fig. 2, is a diagram, shewing a path A, ball B, two discs C C¹, mounted on one
shaft D, driven by a single pulley E; each disc, has a different angle on its face,
thus having different diametrical points of contact with the ball B, the object being
to give it a twisting motion in its ordinary course round the path A, any angle
between 10 and 90°, but I do not advocate too straight a one, as too much side
thrust would cause the path to wear as at X', Fig. 3, and to meet the wear one side
of the path dia. would be smaller as at X Fig. 3.
Fig. 4 shews another part of my invention, where one shaft is made to revolve
within another hollow shaft, but passing through one bearing F1, F and F² are end
bearings, D is the shaft, on one end of which is mounted the disc C' and driven by
the pulley E, on the other end, revolving within the hollow shaft D', on one end
of which is the disc C, and the other end the pulley E¹, the object is to give a
twisting motion, in addition to the ordinary motion imparted to the ball, in
contact with the driving discs; G and G are "steadying" collars described
further on.
Fig. 5 shews an arrangement where three shafts are employed, one D, on which
revolve at different speeds the two hollow shafts G and G¹, at the one end of
which are mounted the two discs C and C', driven by the two sized pulleys E

page_text: and
running in the nearings and the voje being
to the ball.
Fig. 6 is a diagram shewing the system of rods, cranks, levers, balance weights
and governor controlling the mill generally, and forming another part of my
invention.
JY
A is the path, B the ball, C C the discs, D D' the shafts, H H¹ the steadying
collars or sleeves, H, K, Hi K¹ are levers, with moveable fulcrum points,
KL, KL are rods, connecting the balance weighted lever M, with the fixed
point N, & the weight O, the lever M is adjustable by the nuts P P for the
purpose of taking up the wear on ball and discs automatically; it may be to such
a nicety, that the discs are brought up to, but not touching, the ball; or, that
such pressure sufficient to just pick up the ball when the mill is running empty.
The rods IJ, I'J' having radiating points I, I', which are also the fulcrum
points of the compound levers H J K, H J K are connected, and operated by the
governors R, by the lever R', having a fixed point S, at the point Q, Qby the
rods JQ, JQ, the governors R, receive their motion by means of the pulley T,
from the pulley T', fixed on one or other of the driving shafts D D.
Working with, but distinct from the lever R', is an extension R2 (if any other
arrangement, the equivalent must work from the fixed point S,) at the end of
which is a sliding nose R³, operated at the end of the lever R2, by the small lever R,
and rod R'; on the lever R, is a quadrant of holes U, in which is placed a moveable
pin U, for the purpose of stopping the nose R³.
To the lever R2 is attached the rod V, rocking the lever W, at the fixed
point X, at the end of the lever is the rod Y, connected to the block Z, sliding in
the quadrant link Z', having its fixed point at Z².
The block Z, may be placed in any desired position for working, by means
of the rods V Y, lever W, and lever R2, the nose R³, by shifting the pin U into
another hole: Z³ is a rod connected to the tray 7 for shaking the material into
the mill.
The centre lines h¹ h² and h³ h, represent the inward travel of the shafts, due
to the wear on discs and ball, (shewn by a dotted disc and ball) which is about
1inches on each shaft for a 13 inch ball, the fixed points of the rods I J, I'J',
at I and I is on the centre line of ¹, the moveable fulcrum points of J and J',.
is half the distance of ' and ', and, h³ and h*.
The object being to keep the ball perfectly central, when working under any
condition; unless this system is controlled by the fixed points N, and S, it would
be impossible to do so.
Fig. 7 shews a section of a spring disc or face plate, A are the springs, B the
boss, fitted to the shaft D, C is the face in contact with the ball.
Fig. 8 shews a section, Fig. 9 back and front view of Fig. 8 (but with hexagon
hole for shaft) of another form of dise; A are the springs, B the boss keyed on
shaft, C the face in contact, D the end of shaft, E nut screwing on end of boss in
which are recesses for bedding the springs as shewn.
Fig. 10 shews section of the cheapest method of making the discs or face plates,
by bolting a pair back to back, the faces may, by preference, be stamped out, with
key as shewn at E: A are the spiral springs, B the boss, C C the faces, D D the
bolts, E key all round to keep the two plates rigid.
Figs. 7, 8, 9 and 10, all have for their object the removal of the present
objectionable frictional clutches.
Fig. 11 shews section, and Fig. 12 half outside and half section at centre. Of
another part of my invention wherein the path is mounted on a series of rollers,
fitted within the outer casing of the mill, for the purpose of changing the position
of the path, B rollers C pins passing through and keeping rollers in position;
the rollers may be fixed or loose
the pins.
upon
D the casing which is
stationary.
Fig. 13 shews diagrams of a vertical moveable casing A, revolving upon the

page_text: rollers B, which move round on the pins C, due to the motion given to the
casing by the shaft, discs, ball, etc.
Fig. 14 shews another part of my invention which is a general arrangement of a
vertical machine with a revolving pan distributor, and amalgamating plates, more
adapted for gold crushing, wet process. A is the path, B the ball, C' is a disc
mounted on the shaft D, driven by the pulley E, C is the other disc, mounted on a
hollow shaft G, driven by the pulley E. H, H', are the steadying collars.
HJK and H J K', the levers connected by the short rods K L & K¹ L' to the
weighted lever M, having its fixed point N, which partly takes the thrust.
The rods IJ, IJ with the moveable fulcrum points J and J' connected to the
lever R', by the rods J L and J L', coupled to the governor also the extended
lever R² the rod V, rocking lever W, fixed point X, rod Y, block Z, link Z', fixed
point Z2, rod Z³, and the tray Z, being identical with the arrangement shewn by
Fig. 6.
a, a, a, a, are the silvered copper plates, connected in series or circuit, & the gauze
or perforated plate, c the launder, carried round the casing, d the discharge, e distri-
butor, outside casing with main bearings, g, h, and i, metallic packing described
further on, all the letters used are the same as Fig. 6.
For a dry mill the plates and screens would be removed:
Fig. 15 is a diagram shewing the arrangement of levers, rods, cranks, weights etc.
of Fig. 6, with the addition of other rods jjkk² it also shews where one carriage
is run back by just uncoupling the two rods, and k.
Fig. 16 shews the position of the arrangement of plates for amalgamating_inside
a vertical wet mill, A is the path, B the ball C and C are discs; the shaft D runs
through, and on it revolves a hollow shaft for each disc, as is shewn by the shaft F,
carrying the disc C₁, on releasing the lever pins the carriage K, is run back by
means of the screw L; the screens, or discs C and C', may be separately examined:
the screens by preference, may be in halves.
Fig. 17 is a detail, G the copper silvered plate is dropped into a
framework being previously coated by non-conducting materials.
screws, I the wires either connected up in series or circuit, water
where most convenient.
recess the whole
H the binding
may be fed in
Fig. 18 is a section of another part of my invention and Fig. 19 half back and
half front view of same and is for the purpose of arresting steel &c. found in the
material fed into the mili.
A. is a casting forming a disc recessed to receive the magnets or plates with
grooves at the back into which are placed the wires to protect them; it is fixed on
and revolves with the shaft. B. are the electro magnets or plates-by preference-
of soft iron, C and D are the binding screws, attached to which are the positive
and negative wires passing through, and within the grooves at back, and along
the cylindrical portion, with their ends D¹ C¹ going to a commutator or switch.
Previously to placing the electromagnets or plates into position, the casting
must be coated with non conducting composition.
When it is necessary to relieve the magnets or plates of the particles or pieces
of steel thus collected, in the ordinary working of the mill, by the revolving discs,
the current is broken by means of the commutator or switch before mentioned, and
either a receptacle is placed inside the mill from without as mentioned in the early
part of the Specification or the side screen and carriage Q, Fig. 23, is run back and
the plates brushed at intervals as required.
Figs. 20 and 21 shew the section and relative areas of the metallic packing ring
for the purpose of keeping the grit from the bearings by the pressure of water in
the body of the mill. A is the ring from inside, B from outside, C the gland box,
D the shaft, E the tongue piece covering the joint; F the space allowed for
collapsing G indicates the pressure on the larger area pressing the smaller area
tight up against end of gland box; H upward pressure of larger area pressing the
lesser area round the shaft.

page_text: Fig. 22 shews a simple contrivance forming part of my invention. A is the fly-
wheel or pulley, B the rack around it, C the pawl attached to the lever F at D,
taking its fulcrum point at E; an extension of the frame is carried upwards to fit
under the washer nut or other convenient part of the end of the shaft the foot H,
takes a bearing on the ground: the point D may be shifted to I, for going round
the reverse way.
Fig. 23 is a general arrangement for a dry mill more especially arranged for
powdering basic slag. A is the path, B the ball, C a disc keyed to the hollow
shaft G, the two running in bearings F1, F2, F3, the magnetic discs H', are mounted
on and run with the shafts G and D: J. K, J. K' are the commutators with their
mains connected to the dynamo L, where the current is generated, or it may come
from a battery, as most convenient: the system of levers balance weights, rods,
cranks, etc. is identical with one described in Fig. 6, only in an altered position,
and like Fig. 14, the points H H' is a parting force where in Fig. 6 it is a con-
tracting one: M N O P is another arrangement for running back the carriage Q
altho the screw shewn at L, Fig. 16 is preferable: RRR shew the arrangement
of mounting the whole machine upon springs to remove the vibration.
Fig. 24 is a vertical machine shewing another form of magnetic arrester formed
within the pan of the distributor, A path, B ball, C and C discs, mounted upon
the two shafts D and E the plan of arrester from above, would appear nearly as
Fig. 19, except that provision is made for lowering the distributors I if required
from the foot K by means of the lever L, and screw M. N, N', are the commutators,
OO the magnets, P 1" the wires either in grooves as at Fig. 19 or within it: the
same arrangement of levers rods cranks & weights as described and shewn in
Fig. 14 being attached at the point H H', the feed box is by preference closed the
fan for exhausting, drawing its supply of air from Q: J. J. are segments made to
let down as hand doors for the purpose of seeing inside without having to let down
the screw M.
Having now particularly described, and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is,
Firstly, I claim the arrangement whereby the ball is driven round the path by
two discs, each mounted on a separate shaft, and driven independently, substantially
in the manner and for the purpose herein described, and shewn by drawings Figs. 1
& Fig. 15 Sheet 1.
Secondly I claim the arrangement whereby the ball is driven round the path by
two discs having a different angle on their faces, and a different point of contact,
substantially in the manner, and for the purpose herein described and shewn by
drawing Fig. 2 Sheet 1.
Thirdly I claim the arrangement whereby the ball is driven round the path by
two discs, one mounted on one shaft, and the other mounted on another hollow shaft
running on the first shaft, substantially in the manner and for the purpose herein
described and shewn by drawings Figs. 4 & 14 Sheet 1 & Figs. 23 & 24 Sheet 2.
Fourthly I claim the arrangement whereby the ball is driven round the path
by means of two discs driven independently, each mounted on a hollow shaft
running on another shaft, substantially in the manner and for the purpose herein
described and shewn by drawings Fig. 5 Sheet 1 & Fig. 16 Sheet 2.
Fifthly I claim the arrangement of lever rods cranks weights or springs whereby
the wear on the discs or ball is automatically taken up by the balanced lever in
conjunction with the rods, cranks & levers, coupled to the shaft. I further claim
the fixed points "N. & S." whereby the ball is kept perfectly central with the
centre line of mill, under any conditions; substantially in the manner and for the
purpose herein described and shewn by drawings Fig. 6 Sheet 1.
Sixthly claim the use of the governors, in conjunction with the fixed centres,
giving additional pressure to the ball, and further I claim the variable lever rods
B

page_text: rocking bar operating the feed gear, substantially in the manner and for the
purpose herein described and shewn by drawings Fig. 6 Sheet 1.
Seventhly I claim the arrangement of bosses, springs & face plates, forming
driving discs, for impelling the ball, substantially in the manner and for the purpose
herein described and shewn by Figs. 7, 8, 9 & 10.
Eighthly I claim the combination of mechanism, whereby the path is caused to
turn round due to the centrifugal force imparted to it by the ball, in contact with
the discs, fixed on the shafts, and controlled by the levers, &c., substantially in
the manner and for the purpose herein described and shewn by drawings Figs. 11
& 12 Sheet 1.
Ninethly I claim the arrangement of mechanism, whereby the material is more
evenly distributed by means of the revolving pan, substantially in the manner
and for the purpose herein described and shewn by drawings Figs. 14 Sheet 1 & 24
Sheet 2.
Tenthly I claim the arrangement of carriages or slides, carrying the necessary
rods, cranks, weights, levers, screens, bearings, shafts, discs, &c., substantially in
the manner and for the purpose herein described and shewn by drawings Fig. 15
Sheet 1, Figs. 16, & 23, Sheet 2.
Eleventhly I claim the arrangement of amalgamating plates, fitted to the inside
of the mill or machine, connected in series or circuit, charged by electricity,
substantially in the manner and for the purpose herein described and shewn by
drawings Figs. 14 Sheet 1, & 16 & 17 Sheet 2.
Twelfthly I claim the arrangement of mechanism forming magnetic discs, charged
by an electric current substantially in the manner and for the purpose herein
described and shewn by drawings Figs. 18 19 23 & 24 Sheet 2.
Thirteenthly I claim the arrangement of metallic packing, of such section &
areas, substantially in the manner and for the purpose herein described and shewn
by drawings Fig. 14 Sheet 1 Figs. 16 20 & 21 Sheet 2.
Lastly claim the improved general combination of the parts of mechanism
herein described, as new, substantially in the manner, and for the purpose herein
described and shewn in the accompanying drawings.
January 30th 1892
WILSON R. HARLAND.