IMPROVEMENTS IN GRINDING MACHINERY FOR GRINDING MINERAL AND OTHER SUBSTANCES
Year: 1875

page_text: LETTERS PATENT to Henry Reid, of Doveholes, and Henry Alfred
Hubbersty, of Burbage, both in the County of Derby, for the
Invention of "IMPROVEMENTS IN GRINDING MACHINERY FOR GRINDING
MINERAL AND OTHER SUBSTANCES."
Sealed the 2nd May 1876, and dated the 3rd November 1875.
PROVISIONAL SPECIFICATION left by the said Henry Reid and Henry
Alfred Hubbersty at the Office of the Commissioners of Patents,
with their Petition, on the 3rd November 1875.
We, HENRY REID, of Doveholes, and HENRY ALFRED HUBBERSTY, of
Burbage, both in the County of Derby, do hereby declare the nature
of the said Invention of "IMPROVEMENTS IN GRINDING MACHINERY FOR
GRINDING MINERAL AND OTHER SUBSTANCES," to be as follows:-
This Invention relates to the construction and arrangement of the
parts of grinding machinery for grinding mineral and other substances,
whereby greater durability is obtained, and a more perfect grinding
action ensured, and consists in making the grinding surfaces of cast

page_text: iron, the cutting edges being by preference formed in strips of chilled
cast iron, which are afterwards imbedded in Portland or other suitable
cement in grooves or furrows disposed in the faces of the grinding
wheels, which are also constructed of cast iron or steel.
The cutting edges are arranged with a suitable bevel, so corresponding
as to give a scissors-like action, and thus more perfectly to perform their
grinding functions, whilst the disposal of the cutting edges over the
surfaces of the grinding wheels bears a resemblance to the burr stones
at present used for such grinding operations, facility thus being afforded
for the material after it has undergone the grinding operation to fly
outwards by centrifugal force, and to escape from the grinding
machine.
This arrangement and construction of metallic grinding surfaces
possesses the important advantage over burr stones of being much more
durable, and capable of considerably greater wear and tear.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Reid and Henry Alfred Hubbersty in the
Great Seal Patent Office on the 3rd May 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, HENRY
REID, of Doveholes, and HENRy Alfred HubbERSTY, of Burbage, both
in the County of Derby, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of November, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said Henry Reid and Henry Alfred
Hubbersty, Her special licence that we, the said Henry Reid and Henry
Alfred Hubbersty, our executors, administrators, and assigns, or such
others as we, the said Henry Reid and Henry Alfred Hubbersty, our
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

page_text: PROVEMENTS IN UBINDING MACHINERY YOR GRINDING MINERAL AND UTHER
SUBSTANCES," upon the condition (amongst others) that we, the said
Henry Reid and Henry Alfred Hubbersty, our executors or adminis-
trators, by an instrument in writing under our, 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 Scal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that we, the said Henry Reid and Henry Alfred
Hubbersty, do hereby declare the nature of our said 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 relates to the construction and arrangement of the
parts of grinding machinery for grinding mineral and other substances,
whereby greater durability is obtained, and a more perfect grinding
action ensured, and consists in making the cutting or grinding edges of
cast iron, by preference formed in strips of chilled cast iron or steel,
which are afterwards imbedded in Portland or other suitable cement in
grooves or furrows disposed in the faces of the grinding discs, which are
also constructed of cast iron or steel.
The cutting edges are arranged with a suitable bevel, so corresponding
as to give a scissors-like action, and thus more perfectly to perform their
grinding functions, whilst the disposal of the cutting edges over the
surfaces of the grinding discs bears a resemblance to the millstones at
present used for such grinding operations, facility thus being afforded
for the material after it has undergone the grinding operation to
fly outwards by centrifugal force, and to escape from the grinding
machine.
This arrangement and construction of metallic grinding surfaces
possesses the important advantage over ordinary millstones of being
much more durable, and capable of considerably greater wear and

page_text: acquainted for carrying the same into practical effect, we wish it to be
understood that we claim, constructing the grinding or cutting edges of
grinding machinery of cast iron or steel when imbedded in cement,
substantially as herein-before described.
In witness whereof, I, the said Henry Reid, for and on behalf 5
of myself and the said Henry Alfred Hubbersty, have hereunto
set my hand and seal, this Second day of May, in the year of
our Lord One thousand eight hundred and seventy-six.