Improvements in or connected with Apparatus for Grinding or Crushing Ores.
Year: 1894

page_text: Date of Application, 1st Oct., 1894
Complete Specification Left, 29 h Mar., 1895-Accepted, 4th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with Apparatus for Grinding or
Crushing Ores.
I JOSIAH HARRIS of 8 Union Court, Old Broad Street, in the City and
County of London, Mining Engineer, do hereby declare the nature of this
invention to be as follows:-
:-
This invention has for its object to provide means whereby the pulverized ores
may be removed from the stamp mill or other ore grinding or crushing machine
without the addition of water.
In carrying out my invention I provide a settling chamber and connect this by means
of a suitable channel or shoot to the-front of the stamp, mill or other ore grinding.or
crushing machine. Through the back of the stamp box or the like I pass an air
inlet pipe through which air is forced or drawn. by means of a fan or other suitable
air blowing or exhausting apparatus, thereby stirring up the crushed ore and
forcing or drawing the comminuted particles through the perforations in the front
of the stainp box or the like into the shoot or channel aforesaid and from theuce to
the settling chamber where the ore particles are deposited, and the-air passes off
through interstices in the cloth, gauze, or other material forming or in the sides of
the settling chamber.
1004
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.
.Improvements in or connected with Apparatus for Grinding or
Orushing Ores.
1 JOSIAH HARRIS of 8 Union Court, Old Broad Street, in the City and
County of London, Mining 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:-
This invention which relates to improvements in or connected with apparatus for
grinding or crushing ores has for its object to provide meaus whereby the
pulverized Pores may be removed from the stamp mill or other ore grinding.or
crushing machine without the aid of water.
In carrying out my invention I provide a settling chamber and connect this by
means of a suitable channel or shoot to the 'front or back, or both, of the stamp
mill or other ore grinding or crushing machine. Into the stamp box or the like
I pass an air inlet pipe or pipes through which air is forced or drawn by means of a
compressor, fan, or other suitable nir blowing or exhausting apparatus,, thereby
stirring up the crushed ore and forcing or drawing the comminuted particles
through an aperture or through the perforations in the screen front or front and
rear of the stamp-box or the like, into the shoot or channel aforesaid and from
thence to the settling chamber where the ore particles are deposited, and the

page_text: separated air passes off through interstices in the cloth, gauze, or other material
forming or in the sides of the settling chamber.
The accompanying drawings shew part of an ordinary five-stamp battery, of the
double discharge type, that is to say, discharging front and rear, with my invention
applied thereto. Figure 1 is a sectional clevation and Figure 2 is a plan. The
same letters of reference where they occur are used to indicate the same parts in
the two viewe.
A A are the stamps, B B the stamp boxes or mortars C C are the front screens
and CC the rear screens of the stamp boxes all of the usual well known
construction. F is an air inlet pipe connected with an air compressor of suitable
construction and having a valve G, and dividing into two branch pipes F F which
are led through the sides of all the stamp boxes or mortars B, one in rear and the
other in front of each stamp A as shewn in Figure 2. These branch pipes F are
perforated or open in the parts which are inside the stamp boxes or mortars B so
that the air forced through said branch pipes F' will blow up into the interior of
the stamp boxes or mortars B in the form of jets or puffs thereby stirring up the
ore crushed by the stamps and causing the comminuted particles to be forced with
the air through the perforations in the screens C and C. D and D' are the shoots
or channels into which the air laden with the ore particles falls after passing
through the perforations in the screens C and C₁; and E and E' are the settling
chambers into which the air finally passes and where the ore particles are separated
by the expansion of the air in the settling chambers, the air finally escaping free
from particles through the cloth, gauze, or other covered openings H H' in the
Bettling chambers. The covers and other parts of the stamp boxes or mortars will
need to be rendered reasonably air-tight, so that the only outlet for the ore laden
air is through the opening or screen CC to the shoot or channel D.D'.
Although I have described the invention as applied to a double discharge stamp
battery it is equally applicable to single discharge stamp batteries or to other
ore crushing or grinding mechanism. It is also obvious that any suitable air
forcing apparatus other than an air compressor and any suitable means for
discharging the air into the interior of the stamp boxes may be used if so desired
and that instead of forcing air through the stamp boxes, it may be drawn there-
through by means of a fan. But I have found that air from an air compressor is
best adapted for the form of stamp battery shewn in the drawings. According to
the pressure of air, so either coarse or finely crushed ores will be conveyed into the
settling chamber.
In some cases I may dispense with the perforated screen on the front or rear or
on both front and rear of the stamp box or mortar. Also I may cause the shoot
or channel leading from the stamp box or mortar to be deflected upwards.instead of
downwards as shown in the drawings, so that heavy particles. passing out of the
stamp box or mortar with the air will by gravity fall back again into the stamp
box and there be further crushed; or the shoot or channel may be made straight
1 also wisq
and a receptacle provided into which the heavy ore particles will fall.
it to be understood that I do not limit my invention to any particular kind of
settling chamber or to the position thereof; as these are details which can be
modified to suit the particular kind of ore under treatment or to suit other
circumstances without departing from the nature and scope of my invention.
In some cases. I dispense with the settling chamber and let the ore discharge
direct into an amalgamating machine taking care to provide gauze or other openings
in the shoot or channel leading from the stamp boxes to the amalgamating machine
through which the compressed air can escape.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what I
claim is :-
1. The process herein described for removing crushed ore from stamp boxes or
mortare without the aid of water consisting in forcing or drawing air into or

page_text: through the stamp boxes or mortars and leading the air laden with ore particles to
a settling chamber of suitable construction substantially as described.
2. For removing crushed ore without the aid of water a stamp box or mortar
having an air inlet pipe or pipes leading into the interior thereof through which
said inlet air is forced or drawn by suitable mechanism a shoot or channel
connected to the front or rear or to both front and rear of the stamp box or
mortar, a settling chamber, connected by said shoot or channel to the stamp
box or mortar, for separating the ore particles from the air, and having
gauze, cloth, or other covered aperture therein through the interstices in which the
air finally passes off free from ore particles, all the parts being arranged as
shewn by way of example in the drawings and operating substantially in the
manner described.
B
3. Apparatus for removing crushed ore from a stamp box or mortar or other
ore grinding or crushing mechanism without the aid of water combined and
operating substantially in the manner herein before set forth and illustrated in the
accompanying drawings.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.