Improvements in Pulverising Machines.
Year: 1895

page_text: Date of Application, 1st Jan., 1895
Complete Specification Left, 1st Oct., 1895-Accepted, 2nd Nov.,
1895
PROVISIONAL SPECIFICATION.
Improvements in Pulverising Machines.
I, JOHN HOLMAN, of St. Just R.S.O. Cornwall, Engineer, do hereby declare
the nature of this invention to be as follows :-
This invention has reference to the manner in which I construct and arrange
pulverising or grinding machines for reducing to powder, or to sand of lesser
fineness small particles of rock gold or other tailing sands or other like material
by hand power or mechanical means.
In carrying my invention into effect when constructing my pulveriser suitable
for driving by a belt from any convenient source of power, I make my mortar or
grinding box preferably of cast iron the upper end being formed suitable for the
reception of brackets for enabling a shaft or spindle to pass through in a
horizontal direction, and also for permitting another spindle to pass through in a
vertical direction, the brackets being of any suitable shape and made from any
suitable material.
I drive the vertical or grinding spindle by a belt on a flanged pulley fixed on
the upper end of the said spindle. At the lower or bottom end of this spindle I
fix the shoe muller or grinder made of iron steel or other suitable material and
between it and a die cf corresponding form I grind the material to be treated.
"
On the inner end of the horizontal spindle I fix a cam; on the outer end I fix
a step or cone pulley and on the vertical spindle I fix a collar or tappett. As
the horizontal shaft revolves bringing the cam into action against the collar on the
vertical shaft, this latter is raised and let fall; and I thus obtain a "crushing
blow to the material treated, followed by a number (more or less) of grinding
rounds. The proportion of blows to that of grinding rounds I vary by means of
the step pulley and I vary the amount of lift by adjusting the position of the
collar on the vertical spindle.
I make the box with a mouth-piece or feeding trough having an orifice or
opening at the bottom in such a position that the material that is to be ground is
fed on to the block or die automatically, the shape of the inlet trough or feeding
passage being made to suit the material which is to be operated upon.
I arrange for the discharge of the ground or crushed material by an open
adjustable inclined plane or planes fixed on to one or more sides of the mortar box,
over which when grinding in water the ground material is carried in suspension, or
I make my box with an arrangement for fixing gratings or screens in its sides
through which the ground material shall pass and to which it is helped by the
revolving motion of the shoe and the disturbing motion of the blow.
I do not limit the application of my invention to any particular form of mortar
box or any particular arrangement of gearing or driving mechanism; but I modify
the methods of giving motion to the horizontal and vertical shafts to suit any
particular requirement. The shape of the shoe or muller and the shape of the
die I vary also to suit the material which is to be operated upon and the form of
box that is to be applied, and I make it applicable for either wet or dry grinding.
Dated this 1st day of January 1895.

page_text: I, JOHN HOLMAN, of St. Just, R.S.O., in the County of Cornwall, 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 has reference to the manner in which I construct and arrange
pulverising or grinding machines for reducing to powder, or to sand of lesser
fineness, small particles of rock, gold or other tailing sands or other like material
by hand power or mechanical means.
In the accompanying sheet of explanatory drawings-
Figure 1 is a part sectional and part front elevation of my machine, and
Figure 2 is a plan of the same.
In carrying my invention into effect when constructing my pulveriser suitable
for driving by a belt from any convenient source of power, I make my mortar
or grinding box A preferably of cast iron, the upper end or top being formed
suitable for the reception of a cast iron frame B for enabling a shaft or spindle C
to pass through in a horizontal direction, and also for permitting another spindle
or spindles D to pass through in a vertical direction, the frame B being of any
suitable shape and made from any suitable material.
I drive the vertical or grinding spindles by a belt on a flanged or other pulley E
fixed preferably on said spindle when a single spindie is employed, or fixed as
shown in Figure 1 when more than one spindle is used. At the lower or bottom
end of each spindle D I fix the shoe muller or grinder E made of iron, steel or
other suitable material, and between it and a die F of corresponding form I grind
the material to be treated.
On the horizontal spindle C I fix a cam or cams and on the outer end of the
spindle fix either a step cone or ordinary belt driven pulley H, and on each
vertical spindle I fix a collar or tappett K. As the horizontal shaft C revolves
bringing the cams G into action against the collars K on the vertical shafts, these
shafts are raised and let fall, and I thus obtain a "crushing" blow to the material
treated, followed by a number (more or less) of grinding rounds. The proportion
of blows to that of grinding rounds I may vary by means of the step pulley above
referred to, and I vary the amount of lift by adjusting the position of the
collars K on each vertical spindle D. I communicate motion from one revolving
spindle D to the other by long teethed spur wheels L as before described.
I provide the box A with inlet or inlets for the material to be ground and I
provide this inlet or these inlets integral with the said box A or as an arrangement
of pipes or other suitable means and I discharge the material to be ground into the
said box A at any point or points that I consider most suitable for any particular
requirement.
may arrange for the discharge of the ground or crushed material by an open
adjustable inclined plane or planes fixed on to one or more sides of the mortar box,
over which, when grinding in water, oil, or other liquid, the ground material is
carried in suspension, or 1 make my box with an arrangement for fixing gratings
or screens in its sides through which the ground material shall pass and to which it
is helped by the revolving motion of the shoe and the disturbing motion of the
blow. I allow the ground material to pass out of the opening or grating a into a
collecting trough or box M as shown in Figure 1.
I do not limit the application of my invention to any particular form of mortar
box or any particular arrangement of gearing or driving mechanism; but I
modify the methods of giving motion to the horizontal and vertical shafts to suit
any particular requirement and in cases where I would prefer to adopt manual

page_text: means for effecting the rotation and reciprocation of the shoes or mullers, I may
secure a hand flywheel to the shaft G, and also a bevil wheel for the actuation of
a vertically disposed shaft having secured at its upper extremity a tooth wheel for
gearing into the wheels L, which I provide of a sufficient width to gear at any
position of the vertically reciprocating shaft D. The shape of the shoe or muller
and the shape of the die I vary also to suit the material which is to be operated
upon, and the form of box that is to be applied, and I make it applicable for either
wet or dry grinding.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is―
1. The improvements in crushing and pulverising machines in which a
reciprocating and a rotary motion is employed to crush and grind the material,
substantially as and for the purposes hereinbefore described.
2. In a grinding, pulverising or crushing mill, the arrangement of a rotary stamp
or stamps each being provided with an adjustable reciprocating motion for
operating upon the material placed in the die block or box, substantially as and
for the purposes hereinbefore described and as illustrated in the accompanying
drawings.
1
50th day of Sontember 1895.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.