IMPROVEMENTS IN MACHINERY OR APPARATUS FOR CRUSHING ORES AND FOR OTHER LIKE PURPOSES
Year: 1877

page_text: LETTERS PATENT to George Hicks Harris, of White Rock, Machinist, and William
Rounsivell, of Polmorla, Carpenter, both in the County of Cornwall, for the
Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR CRUSHING
ORES AND FOR OTHER LIKE PURPOSES."
Scaled the 29th September 1877, and dated the 16th April 1877.
PROVISIONAL SPECIFICATION left by the said George Hicks Harris and
William Rounsivell at the Office of the Commissioners of Patents on the
16th April 1877.
GEORGE HICKS HARRIS, of White Rock, Machinist, and WILLIAM ROUNSIVELL,
of Polmorla, Carpenter, both in the County of Cornwall. "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR CRUSHING ORES AND FOR OTHER LIKE PURPOSES."
Our Invention relates to machinery or apparatus for crushing ores or for other
like purposes, and is carried into practice as follows, that is to say, I construct a
stamper or stamp head of an annular form, so that when the saine is used for
crushing ore or other material, the same together with the water, when water is
used, will come within the said annular head.
The said machinery or apparatus comprises a cylinder, to which the said stamper
or stamp head is secured by a ring fitted to the periphery of the said cylinder, and
the latter has connected with it any suitable or convenient number of lifters.
I may combine any desired number of the said annular stampers to form a stamp
head, and may construct the same of any suitable material. By this improved
construction the head may be made of greater weight, in proportion to the stamping
surface, than heretofore, the only limit being with regard to the size of the parts
and convenience of working.
Whatever may be the size of the head the material to be acted upon is always
first presented to the inner edge of the annular head, and passes under the entire
width of the stamping surface, and therefore "rows" or "sand" may be stamped
more effectually with this improved head than with others heretofore used.
When water is used it will also be introduced in the centre of the stamp, and the
whole of the water must pass over the stamped or crushed material before escaping

page_text: through the grating or exit apertures, and thereby carries with it the pulverized
material, and the water cannot escape without washing this material.
The stamping face of any given width of head by this improved construction
will be more than double that obtained with an ordinary head of the saine width,
and as the stamp head wears away the stamping is increased and becomes more
effective.
We neovida aivoulan counting which entirely surounds the head and thereby obtain
through the grating or exit apertures, and thereby carries with it the pulverized
material, and the water cannot escape without washing this material.
The stamping face of any given width of head by this improved construction
will be more than double that obtained with an ordinary head of the saine width,
and as the stamp head wears away the stamping is increased and becomes more
effective.
We provide circular grating which entirely surrounds the head and thereby obtain
the largest possible grate area.
Any number of lifters may be employed in cach head, the stability and weight of
the same being increased in proportion to the number of theso lifters.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Cleorge Hicks Harris and William Rounsivoll in the Great Seal
Patent Office on the 15th October 1877.
GEORGE HICKS HARRIS, of White Rock, Machinist, and WILLIAM ROUNSIVELL,
of Polinorla, Carpenter, both in the County of Cornwall. "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR CRUSHING ORES AND FOR OTHER LIKE PURPOSES."
Our Invention relates to machinery or apparatus for crushing ores and for other
like purposes, and comprises the following features, namely:-
First. We construct that part of a stainper usually denominated the stamp head,
used in crushing or stamping ores or other material, of an annular or hollow cylin-
drical form, or of a segmental or any other suitable form, with an orifice, orifices,
indent, or indents therein; and the material to be acted on either with or without
water or other liquid, as circumstances may render most advantageous, is introduced
through the said orifice, orifices, indent, or indents to the stamping face in such
manner and in such quantities as may be desirable or necessary.
Secondly. This stamp head may or may not have a renewable face, in one or
more pieces, as desired.
Thirdly. The said stamp head may be actuated by means of one or more stamp
bars or lifters of any convenient size and shape.
Our said Invention is illustrated in the accompanying Drawing, which shows an
annular head with a single orifice, and also a head with an indent.
Figure 1 is an elevation of an annular head having a removable face; Figure 2
is a plan of the same, and shews the position of the stamp bars or lifters.
Figure 3 is an elevation of a head having an indent instead of an orifice; Figure 4
is a plan of the same.
a is the annular or hollow cylindrical stamp head; b is the removable or detach-
able face thereof; c, c, c, c, are stamp bars by which the head a is actuated.
These parts are formed of iron or other suitablo material. In Figures 1 and 2 d is
the single central orifice through which the material to be treated is introduced and
supplied to the stamp face. In Figures 3 and 4 e is the indent which serves instead
of the orificed for the introduction of the materials to be operated upon to the
stamp face.
In some instances we modify the above-described construction by using a cylinder
to which the stamp heads are secured by a ring. Any desired number of lifters
may be used to support and actuate the said cylinder.
-
We may provide a stamper with any desired number of our improved stamp
heads. By our improved construction we obtain the following advantages, namely —
(1.) Any desired weight of head can be obtained, this weight being limited only
by the ability of moving the head with commercial advantage.
(2.) The larger and consequently the heavier the head the more effectually it will
operate, for however large it may be, the material to be acted upon is compelled to
pass under the face, being always presented at the internal edge thereof, and the

page_text: said material cannot escape from the action of the head till it has passed under the
same.
(3.) When water is used the same is also introduced through the orifice, orifices,
indent, or indents, and thus the whole of the water employed is utilized for washing
away the stamped particles from the partially stamped or crushed material.
(4.) Owing to the more rapid wearing of the head at the edge of the orifice,
orifices, indent, or indents, through or by which the material is supplied, than at
the external edge of the head, the surface area of the head prosented to the material
acted on is continually increased by wear.
(5.) The effectual stamping face of this head can be made of much greater area
than that of an ordinary solid stamp head of the same weight.
(6.) This improved head, when used in an annular form and singly in a coffer,
admits of the largest possible grate area, as it can be entirely surrounded with
grates, and when formed with an indent or indents in the side permits a very much
larger area than is possible with the ordinary head.
(7.) The existing stamp head can readily be altered to the above-described
indented form.
Having thus fully described our said Invention and the manner of performing
the same, we wish it understood that we claim,-
First. A stamp head of such form that the material to be stamped or crushed can
be supplied through an orifice or orifices within the external edge or periphery of
the head, and either with or without the removable or detachablo face, as abovo set
forth, and for the purposes specified.
Second. A stamp head with an indent or indents, by which the material to be
acted upon is presented to the stamping face, and with or without the removable or
detachable face, as above sot forth, and for the purposes specified.
In witness whereof, we, the said George Hicks Harris and William Rounsivell,
have hereunto set our hands and seals, this Twelfth day of October, in the
year of our Lord One thousand eight hundred and seventy-seven.