IN- PROVEMENTS IN TREATING CERTAIN METALLIC SUBSTANCES AND CERTAIN METALLIC ARTICLES, PART OF WHICH IMPROVEMENTS ARE ALSO APPLICABLE TO THE CONSTRUCTION OF TOOLS FOR CUTTING STONE, SLATE, MARBLE, AND OTHER SIMILAR MATERIALS
Year: 1869

page_text: LETTERS PATENT to Archibald Munro, of Arboath, in the County of
Forfar, North Britain, and William Bennet Adamson, of Glasgow,
in the County of Lanark, North Britain, for the Invention of " IN-
PROVEMENTS IN TREATING CERTAIN METALLIC SUBSTANCES AND CERTAIN
METALLIC ARTICLES, PART OF WHICH IMPROVEMENTS ARE ALSO APPLICABLE TO
THE CONSTRUCTION OF TOOLS FOR CUTTING STONE, SLATE, MARBLE, AND OTHER
SIMILAR MATERIALS."
Sealed the 16th November 1869, and dated the 21st May 1869.
PROVISIONAL SPECIFICATION left by the said Archibald Munro
and William Bennet Adamson at the Office of the Commissioners of
Patents, with their Petition, on the 21st May 1869.
We, ARCHIBALD MUNRO, of Arbroath, in the County of Forfar, North
Britain, and WILLIAM BENNET ADAMSON, of Glasgow, in the County
of Lanark, North Britain, do hereby declare the nature of the said
Invention of "IMPROVEMENTS IN TREATING CERTAIN METALLIC SUBSTANCES AND
CERTAIN METALLIC ARTICLES, PART OF WHICH IMPROVEMENTS ARE ALSO APPLICABLE

page_text: TO THE CONSTRUCTION OF TOOLS FOR CUTTING STONE, SLATE, MARBLE, AND OTHER
BIMILAR MATERIALS," to be as follows, that is to say :-
This Invention, which relates to improvements in treating iron and
steel, or alloys of iron or steel, or articles composed thereof, consists in
casting the metals, or their alloys, or articles composed thereof, into chills
of the required shape and dimensions. The metals, or their alloys, or
articles composed thereof, are by the chill rendered very dense, hard,
and brittle, and the present Invention consists in placing these sub-
stances or articles composed thereof, in open or closed vessels or boxes
containing carbonaceous matter, the vessels or boxes so filled being sub-
mitted for a variable length of time to heat in a closed or open furnace,
retort, kiln, or oven, or in place of using carbonaceous matter alone
other substances such as calarcous matter may be admixed with it.
The effect of the treatment is to soften and remove the brittleness of
the metals or their alloys, or articles composed thereof, at the same time
retaining the density, and the metals, or their alloys, or articles com-
posed thereof, may if required be forged, or drawn, or otherwise altered
in shape and be tempered by subsequent heating and cooling. Or the
metals and alloys so treated may be subsequently remelted and cast into
ingots or uses or special shapes.
The second part of the Invention relates to constructing tools for
cutting stone of malleable iron, and submitting them to a similar
treatment, which has the effect of converting the outer parts of the
metal into steel or a metal resembling steel.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 2
filed by the said Archibald Munro and William Bennet Adamson
in the Great Scal Patent Office on the 18th November 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, ARCHIBALD
MUNRO, of Arbroath, in the County of Forfar, North Britain, and
WILLIAM BENNET ADAMSON, of Glasgow, in the County of Lanark,
North Britain, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, hearing date the Twenty-first day of May, in. the year
of our Lord One thousand eight hundred and sixty-nine, in the 32nd

page_text: year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said Archibald Munro and William Bennet
Adamson, Her special license that we, the said Archibald Munro and
William Bennet Adamson, our executors, administrators, and assigns,
or such others as we, the said Archibald Munro and William Bennet
Adamson, our executors, administrators, or 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 TREATING CERTAIN METALLIC SUBSTANCES AND CERTAIN
METALLIC ARTICLES, PART OF WHICH IMPROVEMENTS ARE ALSO APPLICABLE TO THE
CONSTRUCTION OF TOOLS FOR CUTTING STONE, SLATE, MARBLE, AND OTHER SIMILAR
MATERIALS," upon the condition (amongst others) that we, the said
Archibald Munro and William Bennet Adamson, by an instrument in
writing under our hand and seal, should particularly describe and as-
certain 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 we, the said Archibald Munro and William
Bennet Adamson, 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, that is to
say:-
Our said Invention which relates to improvements in treating iron
and steel, or alloys of iron or steel, or articles composed thereof con-
sists in casting the metals, or their alloys, or articles composed thereof,
into chills of the required shape and dimensions. The metals, or their
alloys, or articles composed thereof, are by the chill rendered very dense,
hard, and brittle, and the present Invention consists in placing these
substances, or articles composed thereof, in open or closed vessels or
boxes, containing carbonaceous matter, the vessels or boxes so filled
being submitted for a variable length of time to heat in a closed or open
furnace, retort, kiln, or oven, or in place of using carbonaceous matter
alone other substances such as calcareous matter may be admixed with
it. The effect of the treatment is to soften and remove the brittleness
of the metals or their alloys or articles composed thereof, at the same

page_text: time retaining the density, and the metals or their alloys, or articles
composed thereof, may if required be forged or drawn or otherwise
altered in shape and be tempered by subsequent heating and cooling;
And the metals or alloys so treated may be subsequently remelted, and
cast into ingots or uses or special shapes.
The second part of the Invention relates to constructing tools for
cutting stone of malleable iron, and submitting them to a similar
treatment, which has the effect of converting the outer parts of the
metal into steel or a metal resembling steel.
Having now described the nature of our said Invention, and the
system, mode, or manner, in or under which the same is or may be
used, or practically carried into effect, we would observe in conclusion
that what we consider novel and original, and therefore claim as the
Invention secured to us by the herein-before in part recited Letters
Patent is,-
First. The treating of iron and steel, or alloys of iron and steel cast
in chills, by submitting them to heat in open or closed vessels or boxes
containing carbonaceous or calcareous matter singly, or admixed, for
the purpose of converting these metals or alloys, or articles com-
posed thereof into a malleable condition substantially as herein-before
described.
Second. The construction of tools for cutting stone of malleable iron
and submitting them to the treatment herein-before described.
In witness whereof, I, the said William Bennet Adamson, on behalf
of the said Archibald Munro, and of myself, have hereunto set
my hand and scal, this Sixteenth day of November, One thousand
eight hundred and sixty-nine.