IMPROVEMENTS IN THE METHOD OF LAMINATING AND CRUSHING BARK, AND IN MEANS OR APPARATUS EMPLOYED THEREIN
Year: 1873

page_text: LETTERS PATENT to Charles Elliot, of Coleman Street, in the City of
London, for the Invention of "IMPROVEMENTS IN THE METHOD OF
LAMINATING AND CRUSHING BARK, AND IN MEANS OR APPARATUS EMPLOYED
THEREIN.-A communication from abroad by John Thomas Stamp,
of Melbourne, in the Colony of Victoria, Engineer.
Sealed the 19th August 1878, and dated the 5th March 1878.
PROVISIONAL SPECIFICATION left by the said Charles Elliot at the
Office of the Commissioners of Patents, with his Petition, on the
5th March 1873.
I, CHARLES ELLIOT, of Coleman Street, in the City of London, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN THE
METHOD OF LAMINATING AND CRUSHING BARK, AND IN MEANS OR APPARATUS
EMPLOYED THEREIN," a communication to me from abroad by John Thomas
Stamp, of Melbourne, in the Colony of Victoria, Engineer, to be as
follows:-
-
The Invention is for laminating and crushing bark by direct per-
cussion, whilst it is being driven freely towards the periphery of the mill
by centrifugal action set up in the interior of the mill.

page_text: The utility of this Invention consists in obtaining a much better
result from the same expenditure of power, as in an ordinary bark
mill.
The following is the mode in which the Invention is carried into
effect:―Beaters are arranged inside a casing, in the side of which is an 5
opening through which the bark enters by a suitable hopper. The
beaters are arranged in two sets, mounted on discs, one of which is fixed
on the main shaft or axis, whilst the other is fixed on a boss or sleevo
working on the main shaft, the ono set of beaters being caused to
revolve in a contrary direction to the other set. The-beaters carried by 1
the boss or sleeve consist of rods or bars fixed in circles in the disc, the
outer ends of each ring of beaters being fixed in a separate ring so as to
form a series of cages. The beaters carried by the main shaft or axis
are arranged to work intermediate of those carried by the boss or sleeve,
the smallest circle of beaters being fixed at one end to the disc, whilst tho 1
other ends thereof are fixed in an annular disc, in which the other rings
of beaters are fixed at one end, whilst the other ends of each ring of
these beaters are fixed in separate rings to form "cages," intermediate
of the "cages" carried by the boss or sleeve. The bars or beaters aro
each fastened to the discs by two nuts, to allow of easy replacement and 2
adjustment, and are shanked and rivetted on the rings.
An iron bar carried on a bracket projects into the interior of the mill,
and causes the bark to press against the inner "cage," whence the
centrifugal action is set up.
The bark entering at the centre of the mill and flying towards the 2
periphery receives the blows from each set of bars in a contrary direction,
and is laminated and crushed as required.
The bark having previously been broken into short lengths by any

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of March, in the year of
our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Charles Elliot, Her special
license that I, the said Charles Elliot, my executors, administrators,
and assigns, or such others as I, the said Oharles Elliot, my
executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
THE METHOD OF LAMINATING AND CRUSHING BARK, AND IN MEANS OR Apparatus
EMPLOYED THEREIN," a communication to me from abroad by John Thomas
Stamp, of Melbourne, in the Colony of Victoria, Engineer, upon the
condition (amongst others) that I, the said Charles Elliot, my executors
or administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Charles Elliot, do hereby declare
the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say:-
The Invention is for laminating and crushing bark by direct per-
cussion whilst it is being driven freely towards the periphery of the mill
by centrifugal action set up in the interior of the mill.
The utility of this Invention consists in obtaining a much better result
from the same expenditure of power as in an ordinary bark mill.
The following is the mode in which the Invention is carried into
offect:―Beaters are arranged inside a casing in the side of which is an
opening through which the bark enters by a suitable hopper. The
beaters are arranged in two sets mounted on discs, one of which is fixed.
on the main shaft or axis, whilst the other is fixed on a boss or sleeve
working on the main shaft, the one set of beaters being caused to revolvo
in a contrary direction to the other set. The beaters carried by the boss.

page_text: is keyed the pulley G is carried in two bracket bearings H, H. The diso
carries on it threo or other number of sets of wrought-iron or steel bars
placed concentrically to form cages. These bars are each fastened to the
disc by two nuts to allow of easy replacement, and are shanked and
rivetted over on the outer rings c³, c³, c³. A wrought iron disc K with
a feeding aperture carries the cages ',, . The diso K is attached by.
the bars to the cast-iron disc I keyed on to the shaft F, and revolving
with it. An iron bar L carried on bracket M projects into the interior
of the mill, and causes the bark to press against the inner cage, whence
the centrifugal action is set up. The shaft F together with the cages k³,
, k³, revolves in one direction at from about four to six hundred
revolutions per minute, and the pulley boss with the cages o², o³, c³,
revolve at the same speed but in a contrary direction, so that the bark
entering at the centre of the mill and flying towards the periphery
receives the blows from each set of bars in a contrary direction, and is
laminated and crushed as required. The bark having previously been
broken into short lengths by any ordinary process enters the mill by the
hopper B, and is delivered fit for use into the casing A.
Having thus described the nature of the said Invention, and the mode
in which the same is carried into effect, I would have it understood that
I do not confine myself to any particular number of bars or cages, but
what I claim as tho novelty of this Invention is,―
First. The laminating and crushing of bark by direct percussion
whilst being driven freely towards the periphery of the mill, and not by
being abraded and ground between two surfaces, as is usually done at
present.
And, secondly. I claim the means or apparatus employed in laminating
and crushing bark, arranged and operated in manner substantially as .
herein shown and described.
i
In witness whereof, I, the said Charles Elliot, have hereunto set
present.
And, secondly. I claim the means or apparatus employed in laminating
and crushing bark, arranged and operated in manner substantially as .
herein shown and described.
i
In witness whereof, I, the said Charles Elliot, have hereunto set
my hand and seal, this Second day of September, in the year of
our Lord One thousand eight hundred and seventy-three..