Improvements in Machinery and Apparatus for Grinding or Crushing Mineral, Animal, and Vegetable Substances.
Year: 1891

page_text: Date of Application, 10th Mar., 1891
Complete Specification Left, 11th Jan., 1892-Accepted, 13th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery and Apparatus for Grinding or
Crushing Mineral, Animal, and Vegetable Substances.
WILLIAM HENRY THOMPSON Engineer 155 Fenchurch Street London do
hereby declare the nature of this invention to be as follows:-
The object of iny invention is the improvement of machinery in which the
crushing is effected by means of the centrifugal force of a ball driven around a
circular mill track by means of oscilating discs or Hexible drivers whereby such
discs or flexible drivers are so arranged as to impart a motion to the ball on two
axis while it is being driven around the mill track. Also the better arrangement
of oscilating discs wearing parts and mechanism for controlling the feed.
In carrying my invention into practice I arrange the contact faces of the discs
(.e. the surfaces that are kept in frictional contact with the ball so as to impel it
around the mill track) so that instead of both being alike one is of a larger
diameter than the other or is formed with a different angle or contour to the other
so that the contact lines or circles of the said discs may work in contact with the
ball on different size circles or different distances from its centre or axis instead
of equal circles or distance from the axis as hitherto arranged the object of
arranging the points of contact of the discs with the ball at different distances
from the axis being to impart a motion to the ball on two axis.
Instead of making the bore or hole of the discs with round holes and with key-
ways and keys or cotters as hitherto I make the holes square or hexagon or of such
form as to dispense with the use of the said keyways keys or cotters but preferably
square and opening or radiating to both ends of the hole so as to allow for the
radiation or oscilation of the discs on the shaft on which they are arranged and
which shaft is provided with a suitable sleeve or wearing plates (adjustable or
fixed) on which the said discs take their bearing. Suitable rubber packings may
be substituted for the wearing plates when found desirable, rubber packings may
also be formed so as to fit the holes in the said discs forming both a buffer and a
provision for excluding the pulverized substance.
In order to more readily remove and gain access to the wearing parts the
bearings supporting the mill shaft at each end are arranged upon moveable
standards mounted on suitable slides and capable of being moved too and from the
shaft by a rack and pinion or screw-or the said bearings may be in the form of a
long sleeve or boss or frames arranged in a suitable slide so as to move too & from
the shaft and be worked by a rack and pinion or screw. Either the standards or
the long sleeve bearings or frame may be set fast by suitable bolts or held up or
adjusted to any given point by the action of suitable springs or by means of
weighted levers acting on the aforesaid pinion and rack or equivalent. Also for
the same object I arrange the driving pulleys with long bosses or one or both with
a hollow sleeve having preferably a square hole and mounted on and revolving in
the main bearings through the aforesaid square hole a shaft is passed in such a
manner as to have the discs packing and other details connected with the wearing.
parts placed upon it the shaft is provided with a screw and nut at each end for
the purpose of setting and holding in position all the said parts which are worked
or carried round with the shaft by the pulley or pulleys aforesaid by this arrange-
ment the withdrawal of the said shaft releases the discs and details of the wearing
parts aforesaid.
The discs and wearing parts may be arranged on a suitable sleeve or boss and
thereby connected to the shaft (which may be made in one or more parts) by means
of suitable couplings

page_text: In such mills as described in my Patent No. 19061-1890-in which the ball is
driven by discs and shafts having seperate motion, the shoot shoe or other part
feeding or delivering the substance to the mill is connected with the aforesaid
shafts and discs by means of a chain or chains working over guide pulleys or a
suitable arrangement of levers in such a manner that when the mill is becoming
overcharged the movement imparted to the aforesaid discs and shafts by the rising
and falling of the ball as it rolls over the substance in the mill is communicated to
the aforesaid shoot or shoe or feeding mechanism and is directed in such a manner
as to lift the shoot or shoe or operate the feed controlling mechanism so as to stop
or regulate the supply of the substance to the mill.
10th March 1891.
WM. H. THOMPSON.
COMPLETE SPECIFICATION.
Improvements in Machinery and Apparatus for Grinding or
Crushing Mineral, Animal, and Vegetable Substances.
WILLIAM HENRY THOMPSON Engineer 155 Fenchurch Street London 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 :
The object of my invention is the improvement of machinery in which the
crushing is effected by means of the centrifugal force of a ball driven around a
circular mill track by means of oscilating discs or flexible drivers whereby such
discs or flexible drivers are so arranged as to impart a motion to the ball on two
axis while it is being driven around the mill track. Also the better arrangement
of the oscilating discs wearing parts and mechanism for controlling the feed.
In carrying my invention into practice I arrange the contact faces of the discs
(i.e. the surfaces that are kept in frictional contact with the ball so as to impel it
around the mill track) so that instead of both being alike one is of larger diameter
than the other or is formed with a different angle or contour to the other so that
the contact lines or circles of the said discs may work in contact with the ball
on different sized circles or different distances from its centre or axis instead
of equal circles or distance from the axis as hitherto arranged, the object of
arranging the points of contact of the discs with the ball at different distances
from the axis being to impart a motion to the ball on two axis. Instead of making
the bore or hole of the discs with round holes and with keyways and keys or
cotters as hitherto I make the hole square or hexagon or of such form as to
dispense with the use of the said keyways, keys, or cotters but preferably square
and opening or radiating to both ends of the hole so as to allow for the radiation or
oscilation of the discs on the shaft on which they are arranged and which shaft
is provided with a suitable sleeve or wearing plates (adjustable or fixed) on
which the said dises take their bearing. Suitable rubber packings may be sub-
stituted for the wearing plates when found desirable; rubber packings may also
be formed so as to fit the holes in the said discs forming both a buffer and a
provision for excluding the pulverized substance.
In order to more readily remove and gain access toor adjust the wearing parts
I arrange the driving pulleys with long bosses or one or both with a hollow
sleeve having a square or round hole and mounted on and revolving in the main
bearings through the aforesaid hole a shaft is passed in such a manner as to have
the discs, packing, & other details connected with the wearing parts or dises
placed upon it the shaft is provided with a screw and nut at each end for the
purpose of setting and holding or adjusting in position all the said parts which
are worked or carried round with the shaft by the pulley or pulleys aforesaid by
this arrangement the withdrawal of the said shaft releases the discs and details of
the wearing parts aforesaid.

page_text: The discs and wearing parts may be arranged on suitable sleeve or boss and
thereby connected to the shaft (which may be made in one or more parts) by
means of suitable couplings.
In such mills as described in my Patent No. 19061, 1890 in which the ball is
driven by discs and shafts having separate motion the shoot shoe or other part
feeding or delivering the substance to the mill is connected with the aforesaid shaft
and discs by means of a chain or chains working over guides pulleys or a suit-
able arrangement of levers in such a manner that when the mill is becoming over-
charged the movement imparted to the aforesaid discs and shafts by the rising and
falling of the ball as it rolls over the substance in the mill is communicated to the
aforesaid shoot or shoe or feeding mechanism and is directed in such a manner as
to lift the shoot or shoe or operate the feed controlling mechanism so as to stop or
regulate the supply of the substance to the mill.
DESCRIPTION OF DRAWINGS.
Fig. 1 Sheet 1 is a sectional elevation showing an example of the discs in
contract with the ball at points differing in distance from the axis also the
arrangement whereby such discs are set up to the ball and held in position or
adjusted by means of screws and adjusting nuts at each end of the mill shaft
outside the framing. A. A. is the mill case. B. B. the main bearings.
C. C. the
ball track. D. the ball. E E the discs which together with the springs F. F. F
under compression form an elastic driver (as described in my previous patents)
the adjustment of the discs and compression of the springs is effected by the
movement of the sleeves G G along the mill shaft H H by operating the adjusting
nuts II.
The buffer springs, J, acting on the sleeves and the outside end of the main
bearings are provided for the purpose of steadying any lateral movement of the
mill shaft.
The lines aa show the points at which the discs contact with the ball.
Sheet 2 Fig. 1 is an elevation diagram of a mill described in my Patent
No. 19061-1890 shown for the purpose of illustrating an example of the applica-
tion of the herein before-mentioned feed-controlling mechanism reference to the
above mentioned Specification will show that the rod marked Z. Z is in two parts
and that the rising action of the ball when rolling over the substance lying on the
mill track to be crushed causes these two parts to be drawn asunder in opposite
directions which movement is utilized for controlling or regulating the feed by
being communicated to the lever A. A. which works the slide block B being con-
nected to it by the rod C the slide block works in the link D and has another
movement imparted to it by its connection with the rod, crank, plate, and pulley E
the rod communicates the movement to the feed tray or shoe G which receives
motion in proportion as the action of the ball governs the movement of the slide
block.
Fig. 2 is a diagram showing an arrangement for connecting the feed tray or
shoe directly to the lever A. A in such a manner that the movement of the said
lever lifts the shoe from its working angle and so levelling as to check or regulate
the fall of the substance to be crushed. a. u. is a chain running over guide pulleys b.b.
and connected to the adjusting screw c. Gis the feed tray or shoe.
The mechanism forming the medium by which the action of the ball is com-
municated to the feed apparatus may be varied or modified as may be required
to meet any altered conditions of working or design of such apparatus.
The contact face or faces of each of the two discs may differ from each other
in angle or contour as may be found best to equalize their thrust upon the ball.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare what I claim is
Firstly The arrangement or formation of the contact faces of the discs so that

page_text: they work in contact with the ball at different distances from its axis substantially
in the manner and for the purposes herein described and shown by Fig. 1 Sheet 1
of the drawings hereto annexed.
Secondly claim the arrangement whereby the mill shaft is carried in or by an
adjustable sleeve or sleeves combined with driving pulley or pulleys and revolving
in the main bearings of the mill-further I claim the setting, holding, or adjustment
of the driving discs or wearing parts in proper relation to the ball by operating the
said sleeve or sleeves from one or both ends of the mill shaft by means of a screw
and nuts or equivalent provided at each end of the shaft for the purpose of setting
or adjusting the discs or wearing parts substantially in the manner and for the
purposes herein described and shown by Fig. 1 Sheet 1 of the drawings hereto
annexed.
Thirdly I claim the utilization or adaptation of the working action of the ball
for the purpose of automatically controlling the feed and the communication of such
action to the feed apparatus by the means of arrangements of mechanism substan-
tially in the manner and for the purposes herein described and shown by Fig. 1 & 2
Sheet 2 of the drawings hereto annexed.
WM. H. THOMPSON.