Improvements in Apparatus for Pulverizing or Amalgamating Ores.
Year: 1893

page_text: Date of Application, 19th June, 1893-Accepted, 22nd July, 1893
COMPLETE SPECIFICATION.
Improvements in Apparatus for Pulverizing or Amalgamating Ores.
We, DAVID STEVENS, of Gwithian, Tin Streamer, and CHARLES DAVEY
BARTLE, of Illogan, Ironfounder, both in the County of 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:-
Our invention relates to pulverizers or to combined pulverizers and amalgamators
for treating tin and other ores and especially to that class of apparatus in which two
shoes rotating one upon the other in a circular pan are employed and in which a
cover having upon it a spout for the discharge of the pulverized materials and
water, is used in connection with the pan.
When such an apparatus has been used for a time the shoes wear and consequently
become thinner so that if no adjustment is provided for between the said shoes and
the cover an undue accumulation of material will take place in the pan whereby
the pulverizer will be less effective in operation and require a greater power to
drive it, than would otherwise be the case.
The chief object of this invention is to provide means whereby a uniform distance
may be maintained between the said cover and the shoes, and in carrying out our
invention we advantageously arrange the cover so that it may be adjusted relatively
with the shoes but we may, if desired, arrange the bottom of the pan so that it may
be lifted bodily with the shoes.
To enable our invention to be fully understood we will describe the same by.
reference to the accompanying drawings, in which :-
Figure 1 is a sectional elevation of our improved pulverizer; and,
Figure 2 is a plan of the same with certain parts removed:
Figure 3 is a view of the discharge spout looking in the direction of the arrow,
Figure 2; and,
Figure 4 is a section of the same on the line 4-4, Figure 2.
a indicates the pan, b.the shoe upon the bottom of the said pan, and c the shoe
rotating upon the shoe b, the said shoe being connected to the disc d driven by the
shaft e carried in the cross frame f.
9 is our improved cover which is fitted within the pan a and which upon its.
periphery is provided with strips of india-rubber or other suitable packing
material to prevent the escape of liquid between the said cover and the walls of the
pan. is the opening in the centre of the cover g through which the pulverized
material is carried by the water into the spout j formed by the flange upon the
top of the cover.
In order to adjust the cover g we provide on the walls of the pan brackets l,
carrying in suitable bearings nuts m, m having hand wheels n,'n formed in one piece
with them, and to the cover we connect screws o, o working in the said nuts in such
a manner that when the latter are rotated by the hand-wheels n, n the screws and
consequently also the cover will be raised or lowered.
As the top of the cover which forms the bottom of the spout is below the level
of the upper edge of the pan an opening p is formed in the side of the pan as
indicated by the dotted lines in Figure 3 and in section in Figure 4.
To prevent leakage between the spout and the pan and at the same time to admit.
of the adjustment the said spout is provided with a flange or plate 7 fitting against
a corresponding flange on the pan and connected thereto by bolts r, passing
through slots s, s in the said plate q. In adjusting the cover the said bolts r, r
are first loosened and after the cover has been adjusted are again tightened.

page_text: t is a hopper attached to the cover g and having an opening t¹ through which the
material to be treated is introduced into the pulverizer.
Although we have described the cover as being adjustable it is to be understood
that it may be a fixture the bottom of the pan being made adjustable to lift the
shoes towards the cover.
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. In an ore pulverizer or combined pulverizer and amalgamator having shoes one
of which is adapted to be rotated relatively with the other, the provision of means
whereby the shoes and cover may be maintained in the same relative positions,
notwithstanding the wear of the shoes, substantially as described.
2. In an ore pulverizer or combined pulverizer and amalgamator the combination
with the pan and the shoes contained therein, of a cover provided with a spout
through which the liquid discharged from the pan escapes and adapted to be
adjusted relatively with the said shoes, whereby the said cover and spout can be
maintained in a uniform position relatively with the said shoes, substantially as
described.
3. In a pulverizer of the kind referred to in the preceding claiming clause, the
arrangement for adjustably fixing the spout to the pan, substantially as described,
by reference to Figures 3 and 4 of the accompanying drawings for the purpose
specified.
4. The improved pulverizer or combined pulverizer and amalgamator constructed
and arranged, substantially in the manner hereinbefore described and illustrated in
the accompanying drawings.
Doted the 10th ICT 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.