An Improved Apparatus for Crushing Gold Quartz and other substances.
Year: 1891

page_text: The decision of the Comptroller-General, of the 28th day of February 1893,
allowed, under Section 18 of the Patents, &c. Act, 1883, an Amendment
of this Specification.
Date of Application, 16th Dec., 1891
Complete Specification Left, 14th Oct., 1892-Accepted, 16th Dec., 1892
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Crushing Gold Quartz and other
substances.
WILLIAM ALFRED GREEN Fern Villa Llanbadarn Road Aberystwyth and
GOROD DAVIS, 4-Bridge Street Aberystwyth do hereby declare the nature of
this invention to be as follows:-
The improvement consists in applying a screw and spring to the crushing and
grinding apparatus, so as to regulate the pressure on the rolls. The said rolls to be
an improved shape, being a bevelled edge, the side of the roll with the larger
diameter being on the inner side as the rolls revolve, thus having a rubbing as well
as a crushing power on the substance to be treated. The pan or part in which the
rolls revolve is sloped or bevelled to suit the rolls. The outlet in the pan through
which the stuff passes after being crushed is covered by a strainer or sieve.
Dated his 10th 1
WM. A. GREEN,
By his Attorney, Sophia Green.
GEORGE-DAVIS.
COMPLETE SPECIFICATION (AMENDED).
An Improved Apparatus for Crushing Gold Quartz and other
substances.
We, GEORGE Davis, Merchant, of 4 Bridge Street, Aberystwyth, and
I WILLIAM ALFRED GREEN, Engineer, of Fern Villa, Llanbadarn Road,
Aberystwyth, 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 for an improved apparatus for crushing gold quartz and other
substances has for its object to provide an efficient and simple apparatus for
crushing gold quartz and other substances, which shall not be liable to get out of
order and the wearing parts of which can readily be renewed.
In the accompanying sheet of illustrative drawings
-
Figure 1 is a front elevation of a machine for crushing gold quartz and other
substances constructed according to this invention and Figure 2 is an end elevation
of the same.
The crushing rollers A are mounted loosely on a horizontal shaft I rigidly
connected at its centre to the vertical shaft L mounted in bearings M and rotated
from the horizontal shaft N through the bevel gearing O, the vertical shaft L being
adapted to slide axially in but forced to rotate with its bevel wheel. The upper.
end of the shaft L is received in a thrust block P fitting loosely in the cross piece Q
of the main frame of the machine. The thrust block P bears against the underside
Price 8d 1

page_text: of the head R sliding on vertical rods S fixed to the main frame. Above the
head R is a similar head T also sliding on the vertical rod S and between the two
heads is a spiral or other suitable spring G. The upper ends of the rods S are
joined by the cross piece V through which passes centrally a screw C bearing on
the upper head T. The pressure on the rollers is regulated by means of the
screw C, which can be provided with a suitable handle for operating it, so as to
regulate the size of the crushed substance: The spring G reduces the shock to the
apparatus. The rollers A are bevelled as shown with the larger diameters on the
insides and revolve in the pan B which is circular or suitably curved in vertical
section. The pan B is fitted with a removable circular casting F and the rollers A
work on an annular curved path near the circumference of the casting. The casting
is secured in the pan B by a central bolt X. By this arrangement the path is
renewable, and can be replaced without any fitting, the rough casting thoroughly
adapting itself to the shape of the pan without being specially fitted. The pan is
provided with a feed hopper F H and with an outlet D covered with a sieve,
perforated plate, wire netting or gauze E of the desired mesh according to the
degree of fineness to which the substance is to be reduced.
When the substance to be crushed fed into the pan B it passes underneath the
rollers A is gradually carried round by them and as the material passes the outlet D
that material which is sufficiently ground passes through the sieve E to the outlet D,
the remaining material being again carried round the pan by the rollers and further
crushed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, we declare that what we I
claim is :-
:-
1. In a roller crushing apparatus, regulating the pressure on the roller's by means
of a screw acting through a spring on a vertical shaft rigidly fixed to the horizontal
roller shaft and adapted to move axially relatively to the driving gear so that
the pressure can be regulated during the working of the apparatus the whole
substantially as described.
2. A roller crushing apparatus consisting of bevelled rollers working on a
circular path and with their largest diameter inwards and of a circular path curved
in cross section and fitting the bevel of the rollers the whole substantially as
described.
3. In a roller crushing apparatus a removable circular path on which the rollers
work adapted to be fixed in its rough state in the pan of the crushing apparatus,
substantially as described.
4. In a roller crushing apparatus covering the outlet with a sieve of the desired
mesh through which the substance is free to pass as it is ground to the required
fineness.
Ton
Hakan TVID
WM. A. GREEN,
Signed, by his Power of Attorney, S. Green..
GEORGE DAVIS.