Improvements in Machinery for Reducing Tin Stuff and other Partially Pulverized Ores to Extract the Metal therefrom, and also for Grinding Paint, Cement, and other Hard Substances.
Year: 1887

page_text: Improvements in Machinery for Reducing Tin Stuff and other
Partially Pulverized Ores to Extract the Metal therefrom, and
also for Grinding Paint, Cement, and other Hard Substances.
JOHN TOY, Brass & Iron Founder, Helston, Cornwall, SAMUEL HENRY STEPHENS,
Tin Stream Worker, Bridge, Illogan, Cornwall do hereby declare the nature of this
invention to be as follows:-
This invention refers to improvements in the Grinding or Pulverizing Machinery
described in the Specification of Letters Patent granted to John Toy and Samuel
Henry Stephens bearing date the 29th of August, A.D. 1882 and numbered 4128.
Our invention refers firstly to the addition of one or more rings (of any preferred
material) and of sufficient height to be cast on or fixed to the Muller.
Secondly-To the casting or fixing plates of iron of any required thickness
between the arms of Muller.
According to the first part of our invention we fix on to the muller a ring or rings
of a height that shall be found most suitable for the better discharge of the ground
material and of a diameter that shall give the required space between the said ring
and the inside of the Pan, for holding the water and partially pulverized material.
The advantages we claim for this method or plan are :—
First. A great saving of the Power required to work these machines. When it is
intended to discharge in the usual way from the outlet on the top of the Pan, the
material will be delivered by a suitable launder inside the fixed ring, towards the
centre of the machine and allowed to pass through holes made close to the boss in
the centre of the muller, into the well below, thereby saving the power now required
to overcome the accumulation of sand and water on the top of the muller and centre
of the Pan, equal to the area of the inside of the said ring and which has been proved
to be such a drawback to the machines as at present constructed. But when it is

page_text: intended to discharge from the well in the bottom of the Pan the feed will be delivered
to the Machine in the space between the side of the Pan and the fixed ring. The
fixed ring in this case entirely keeps any of the material from passing over the top of
the shoes into the well and discharge pipe in the centre of the machine and escaping
without being ground.
Second A greater degree of and more uniform fineness. After the material is
distributed from the well in the bottom of the Pan by the Power of centrifugal force,
on to the grinding surface and thoroughly ground it passes into the space between the
Pan and the fixed ring and allowed to accumulate to such a height-by means of
heightening or lowering the outlet on the top of the Pan--that shall be found to give
the desired amount of pressure for holding or checking the Material on the grinding
surfaces and thus allowing it to be more effectually ground.
According to the second part of our invention we fill up the spaces between the
arms of the Muller, with plates of iron close into the boss in the centre, simply
allowing of small perforations for the material and water to pass into the well of the
Machine, below, thus making it of the form of a convex plate. The object of which
is to keep any material and water from rising above the level of the top of the shoes
when discharging either from the top or bottom of the Pan.
These improvements can also be supplied to any other flat bottom pulverizer now in
use, other than the sort forming the subject of this invention.
In order to more fully describe and illustrate the manner in which we carry our
invention into effect we will now proceed to further describe the same with reference
to the accompanying drawings.
Figure 1 is a vertical cross section of an ore pulverizer or crusher for reducing
Tin stuff and other partially pulverized ores and for other grinding purposes. It
shows in section the fixed ring, A. and plated muller, B. with dotted lines to denote the
position of the plates, C. between the arms, D.
Figure 2 is a plan of same.
The general operation of the Machine is as follows.
When it is intended to discharge in the usual way from the outlet, P. on the top of
the pan, the material mixed with water will be delivered to the Machine by a suitable
launder, E. inside the fixed ring, A. towards the centre of the Machine and allowed to
pass through holes, F made close to the boss in the centre of the muller, B. into the
well, G. below, and distributed on to the grinding surfaces through the divisions, H.
between the shoes. While the material mixed with water has been fed into the
machine from the launder, E. the shaft, I. is being rotated by means of the bevel
wheels, J. and thus communicating rotary motion to the upright driver, K. muller, B.
and shoes secured thereto. The material is thus thoroughly ground and passes into
the space, L. between the pan and fixed ring, A. where it accumulates to a
sufficient height to discharge from the outlet on the top of the pan, but when it is
intended to discharge from the centre of the pan by means of the outlet, M, the
material mixed with water will be delivered to the machine by a suitable launder in
the space, L. between the side of the pan and fixed ring, A. and will pass on to the
grinding surfaces through the divisions, H. between the shoes and after being
thoroughly ground into the well, G. and discharge pipe, M. The plated muller, B.
entirely keeping the material from rising above the level of the top of the shoes, when
discharging from the top or bottom of pan.
Having thus described the nature of our invention and the manner of performing
the same; we declare that what we claim as our improvements in machinery
for reducing tin stuff and other partially pulverized ores to extract the metal
therefrom and also for grinding other hard substances :-
First. The addition of one or more rings, A. and operating substantially as and for
the purpose described and with reference to Figures 1 and 2 of the accompanying
drawings.
Second. The casting or fixing of plates of iron, C. between arms of muller and
operating substantially as and for the purpose described and with reference to
Figures 1 and 2 of the accompanying drawings,

page_text: We would have it understood that we make no claim for these parts seperately, but
what we claim is the addition or application of these parts in connection with
grinding or pulverizing machinery as herein substantially described.
Dated this 20th day of October 1887.
Improvements in Machinery for Reducing Tin Stuff and other
Partially Pulverized Ores to Extract the Metal therefrom, and
also for Grinding Paint, Cement, and other Hard Substances.
JOHN TOY Brass & Iron Founder Meneage Street Helston, SAMUEL HENRY
STEPHENS Tin Streamer Illogan Cornwall, 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 refers to improvements in the grinding or pulverizing Machinery
described in the Specification of Letters Patent granted to John Toy and Samuel
Henry Stephens bearing date the 29th of August, A.D. 1882 and numbered 4128.
Our invention refers firstly to the addition of a ring (of any preferred material)
and of sufficient height, to be cast or fixed to the muller.
Secondly to the casting or fixing plates of iron between the arms of muller.
According to the first part of our invention we fix on to the muller a ring of a
height that shall be found most suitable for the better discharge of the ground
material and of a diameter that shall give the required space between the said ring
and the inside of the Pan for holding the water and partially pulverized material.
The advantages we claim for this method or plan are:-
First. A great saving of the power required to work these machines. When it is
intended to discharge in the usual way from the outlet on top of the pan, the
material will be delivered by a suitable launder inside the fixed ring towards the
centre of the Machine & allowed to pass through holes, made close to the boss in
the centre of the muller, into the Well below thereby saving the power now required
to overcome the accumulation of sand & water on the top of the Muller & centre of
the pan equal to the area of the inside of the said ring & which has proved to be
such a drawback to the Machines as at present constructed. But when it is intended

page_text: Figure 1. is a vertical cross section of an ore pulverizer or crusher for reducing Tin
Stuff & other partially pulverized ores & for other grinding purposes.
It shows
in section the fixed ring, A. and plated muller B. with dotted lines to denote the
position of the plates, C. between the arms, D.
Figure 2. is a plan of the same.
The general operation of the machine is as follows.
When a class or sort of Tin Stuff has to be ground that will require the
discharge to take place on the top of the pan at, P. the material mixed with
water will be delivered to the machine by a suitable launder, E. inside the fixed
ring, A. towards the centre of the machine and allowed to pass through holes F.
made close to the boss in the centre of the muller B. into the Well G. below
and distributed on the grinding surfaces through the divisions, H. between the
shoes. While the material mixed with water has been fed in from the launder, E.
the shaft I. is being rotated by means of the bevel wheels, J. and thus communicating
rotary motion to the upright driver, K. muller B. and shoes secured thereto. The
material is thus thoroughly ground and passes into the space, L. between the pan and
the fixed ring, A. where it accumulates & rises to a sufficient height to discharge
from the outlet on the top of the pan. Should it be required to discharge from the
outlet M in the well G. to suit the class of stuff under treatment, the material will
be delivered to the machine by a suitable launder in the space, L. between the side
of the pan and the fixed ring, A. and pass on to the grinding surfaces through the
divisions H. between the shoes and after being sufficiently ground, into the well &
discharge pipe M. The plated muller, E. in both ways entirely keeping the material
from rising above the level of the top of the shoes when discharging either from the
top or bottom of the pan.
Having thus described the nature of our invention & the mannar of performing
the same,
we declare what we claim as our improvements in machinery for
reducing Tin Stuff & other partially pulverized ores to extract the metal therefrom
and also for grinding other hard substances are :-
First. The addition of a ring and operating substantially as and for the purposes

page_text: described and with reference to Figures 1. and 2. of the drawings "left with pro-
visional specification."
Second. The casting or fixing plates of iron between the arms of Muller and
operating substantially as and for the purposes described and with reference to
Figures, 1. and 2. of the drawings "left with the provisional specification."
We would have it understood that we make no claim for these parts seperately, but
what we claim is the addition or application of these parts in connection with grinding
or pulverizing by machinery as herein substantially described.
JOHN TOY.
SAMUEL HENRY STEVENS.