Improvements in or connected with Crushing or Grinding Mills.
Year: 1889

page_text: Date of Application, 12th Nov., 1889
Complete Specification Left, 12th Sept., 1890-Accepted, 8th Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in or connected with Crushing or Grinding Mills.
I RICHARD EDMUND SHILL of 37 Worlingham Road East Dulwich in the County
of Surrey Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to provide a ball mill which is simple in construction
and efficient in action and not liable to get out of order.
My invention consists in driving the balls by means of rotating arms drivers or
brackets which are provided with rollers or runners which bear on the balls so that
the said balls are free to turn independently of the device by which they are driven
and the bearing being a runner or roller is not subjected to the hitherto existing
objectionable wear. The rollers or runners of the arms drivers or brackets are profer-
ably mounted so that they turn on rollers or balls in their hearings. The balls of the
mill and the race may be made of any suitable material such as iron or steel or in
cases where this is objectionable I may make them of a composition of cement and
sand. I prefer to make the mill a horizontal one that is to say one in which the race
is situated horizontally it being of a semicircular or partly circular shape in cross
section and I make it so that it as well as the balls can be readily removed for renewal.
The matter ground will rise on to the outer edge of the race from which it can be
removed by scrapers on the arms drivers or brackets.
Additional weight may be put on the balls by a flat plato (or plates) which rests
on the top of the balls without interfering with the freedom of movement of the
said balls.
1
3000
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Crushing or Grinding Mills.
I RICHARD EDMUND SHILL of 49 Crystal Palace Road (late of 37 Worlingham
Road) East Dulwich in the County of Surrey 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 :-
The object of my invention is to provide a crushing or grinding mill which is
simple in construction and efficient in action and not liable to get out of order.
My invention consists in driving the balls used in crushing or grinding mills by
means of rotating arms drivers or brackets which are provided with rollers or runners
which bear on the balls so that the said balls are free to turn readily and indepen-
dently of the device by which they are driven and the bearing being a runner or
roller is not subjected to the hitherto existing objectionable wear.
The rollers or
runners of the arms drivers or brackets are preferably mounted so that they turn on
rollers or balls in their bearings. The balls of the mill and also the race may be made
of any suitable material such as iron or steel or in cases where this is objectionable
I may make them of a composition of cement and sand. I prefer to make the mill a
horizontal one that is to say one in which the race is situated horizontally it being of
a semicircular or partly circular shape in cross section and I make it so that it as well
as the balls can be readily removed for renewal. The matter ground will rise onto the
outer edge of the race or into a groove therearound from which it can be removed by
a revolving scraper or scrapers.
Additional weight may be put on the balls by a plate (or plates) which rests on

page_text: the top of the balls without int fering with the freedom of movement of the said
balls and the arms or drivers which carry the rollers or runners may be carried by
and be adjustable on this plate.
And in order that my said invention may be fully understood I shall now proceed
more particularly to describe the same and for that purpose shall refer to the several
figures on the annexed sheet of drawings the same letters of reference indicating
corresponding parts in all the figures.
Figure 1 is a vertical section and Figure 2 a plan (with the cover removed) of a
grinding or crushing mill constructed according to my invention.
h
A is the casting or framing of the mill supported on standards A* and having in it
a cavity in which is situated the annular race B which is of semi-circular or partly
circular shape in cross section and is capable of being readily removed and replaced
when desired. Through the centre of the casting A and race B passes a shaft C
driven by means of the bevel wheels c d and shaft D from any suitable motor. To
the shaft C is fixed the collar piece E having ribs or projections e on it which engage
with corresponding recesses in the plate F which rests upon the tops of the balls G.
Secured to the plate F are brackets arms or drivers H upon a pin carried by each of
which is mounted a roller or runner which bears upon the ball G next to it. When
the shaft D is driven it drives through the wheels d and c the shaft C which through
the collar piece E drives the plate I carrying the arms II and rollers 2 which latter
bear upon the balls G and force them round upon the race B and so the balls effect
the crushing or grinding of material between them and the race. For the purpose of
feeding the material to the mill I have shewn a hopper I and shoot adjustable in
angle by the rod so as to regulate the rate at which the material is fed into the
apparatus. Jis a trough into which the material passes after grinding and K is a
scraper fixed to the plate F for expelling by the outlet L the ground material as it
rises over the edge of the race. Mis a cover enclosing the apparatus and having an
opening m for the admittance of the material to be ground.
Although I have shewn the plate F as resting upon the balls I may arrange it so
that it is supported by a flauge on the collar piece a little above the balls so as to
not rest theroon. Or I may dispense with the plate and make the arms H provided
with the rollers project from the collar piece E or shaft C. I prefer to secure the
arms H to the plate F so that the points at which the rollers h bear on the balls G
can be adjusted either so that the said rollers bear on a point in the circle in which
the centres of the balls are situated or to one side thereof. The slots in the plate F
are for this purpose as by loosening the screws h³ the arms H can be adjusted in the
slots and refixed as desired.
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 that what I
claim is :-
1. In grinding or crushing mills the combination with an annular race and balls
running therein of arms drivers or brackets carrying rollers or runners which bear on
and drive the balls around the race all substantially as herein before described.
2. In grinding or crushing mills the combination with an annular race and balls
running therein of arms, drivers or brackets carrying rollers or runners which bear
on and drive the balls around the race the said arms drivers or brackets being carried
by a plate resting or not on the top of the balls and driven substantially as herein-
before described.
3. The arrangement and combination of parts constituting the crushing or
grinding mill substantially as hereinbefore described and illustrated in the accom-
panying drawings.