Improvements in Pulverizers.
Year: 1890

page_text: Date of Application, 25th Aug., 1890
Complete Specification Left, 25th May, 1891-Accepted, 27th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Pulverizers.
We, JOHN JAMES, of Tuckingmill, in the Parish of Illogan, Cornwall,
Engineer, and CHARLES DAVEY BARTLE, of Carn Brea, Illogan aforesaid,
Ironfounder, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in ore pulverizers or crushers for
reducing tin stuff and other partially pulverized ore, applicable also for other
grinding purposes.
In carrying out our invention we employ a pan of conical or concave shape
provided with a rubber revolving between top and bottom stationary shoes corre-
sponding in form with the bottom of the pan whereby we obtain a maximum
amount of grinding surface the said rubber and shoes being perforated.
The rubber is connected with and driven by a vertical shaft having its bearings
in a bow or cross bar fixed to the pan. Suitable means such as screws in the bow
or cross bar are provided for adjusting the upper shoe so as to take off any weight
required from the grinding surfaces and vice versa.
Dated the 25th day of August 1890.
G. F. Redfern & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Pulverizers.
We, JOHN JAMES, of Tuckingmill, in the Parish of Illogan, Cornwall
Engineer, and CHARLES DAVEY BARTLE, of Carn Brea, Illogan, aforesaid, Iron-
founder, 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 to an improved apparatus chiefly designed for crushing
or pulverizing ores, but also applicable for crushing or pulverizing other materials.
In carrying out our invention we employ what we term a rubber adapted to
rotate between two stationary grinding surfaces or shoes placed in a suitable pan,
openings being formed in the shoes and rubber to allow the passage of the material
therethrough. The rubber is connected with and driven by a vertical shaft
having its bearings in a bow or cross-bar fixed to the pan. Suitable means such
as screws or levers are provided for adjusting the upper shoe and the rubber so as
to regulate the pressure between the shoes and the rubber.
To enable our invention to be fully understood we will describe the same with
reference to the accompanying drawing, in which :—
Figure 1 is a sectional elevation of a pulverizer constructed according to our
invention; and,
Figure 2 is a plan, certain parts being removed.
. a indicates our improved rubber, and b, c the upper and lower shoes respectively
between which the said rubber works, the said upper shoe being vertically
adjustable as hereinafter described, but held against rotation by lugs ¹, b
entering grooves in the walls of the pan d, whilst the lower shoe is supported
upon the bottom of the said pan and prevented from rotating by lugs c¹, c¹

page_text: entering recesses in the said bottom. The pan d is supported upon standards e, ey
or, by preference, upon a wood frame.
As shewn in the drawing the rubber and shoes are represented as being of a
conical shape but, if desired, they may be flat or of any other suitable form.
is the shaft upon which the rubber is secured and through the medium of
which motion is imparted thereto, and y is the cross-head in which the bearings
for the said shaft are carried.
and
h, h are screws by means of which the upper shoe is suspended from the cross-
head and by which it can be adjusted so as to bear more or less heavily upon the
rubber. i is a lever which is pivotted upon an arm on the cross-head
connected at one end to the shaft f, the other end carrying a nut j provided with a
hand-wheel for operating it and working upon a screw j¹connected to the pan.
When this nut is screwed downwards upon the screw it will be obvious that the
shaft and consequently also the rubber a will be raised.
k, are openings formed in the upper shoe and the rubber respectively, and m, m
are openings formed in the lower shoe.
o is an opening formed in one side of the pan and provided with grooves P, P,
as indicated in Figure 24, which is a section on the line a a, Figure 2, the said slots
serving to receive boards for regulating the height of water in the pan.
It will be noticed by reference to Figure 2 that the openings in the rubber and
shoes are placed in such positions that the material cannot drop through the
various openings without being properly pulverized.
In the operation of the apparatus the material to be treated is introduced as
near to the centre of the upper shoe as possible, and from thence it quickly finds
its way through the openings into the perforations in the rubber and thence through
the openings.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. Apparatus for pulverizing ores and other substances comprising a rubber
adapted to rotate between grinding surfaces, substantially in the manner described.
2. A pulverizer comprising a rotary rubber and two shoes between which the
said rubber rotates, the said shoes and rubber being of a conical form, substantially
as described with reference to the accompanying drawing.
3. The manufacture and use of the improved pulverizer hereinbefore described
and illustrated in the accompanying drawing.
Dated the 25th day of May 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.