INPROVE- MENTS IN STAMP HEADS
Year: 1852

page_text: LETTERS PATENT to Francis Daniell, of Camborne, in the County
of Cornwall, Analytical Chemist, for the Invention of "INPROVE-
MENTS IN STAMP HEADS."
Sealed the 20th April 1858, and dated the 1st November 1852.
PROVISIONAL SPECIFICATION left by the said Francis Daniell at
the Office of the Commissioners of Patents, with his Petition,
on the 1st November 1852.
I, FRANCIS DANIELL, of Camborne, in the County of Cornwall,
Analytical Chemist, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN STAMP HEADS" to be as follows:-
My improvements in stamp heads consist in forming the working
parts of the same, or those most exposed to wear, of cast or wrought
steel, the body of the stamp head being of cast iron as usual. I attach
the steel portion or shoe to the stamp head by a dovetail fitting into &
corresponding groove either in the shoe or stamp head, and I further
secure the shoe in its place by a bolt or bolts passing through the cast
iron socket and dovetail, if found necessary. This mode of construction
will be found of considerable advantage in stamping tin ores which are

page_text: liable to be deteriorated in quality by the particles of iron worn from the
stamp head during the operation of stamping becoming mixed there-
with; it also admits of the steel shoe being readily removed when worn,
and replaced by a new one, and thus effects a material saving in the
cost of stamp heads.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Francis Daniell in the Great Seal Patent Office
on the 29th April 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
FRANCIS DANIELL, of Camborne, in the County of Cornwall, Analytical
Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of November, in the year
of our Lord One thousand eight hundred and fifty-two, in the six-
teenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Francis Daniell, Her special licence
that I, the said Francis Daniell, my executors, administrators, and as-
signs, or such others as I, the said Francis Daniell, my executors, admi-
nistrators, 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 STAMP
HEADS," upon the condition (amongst others) that I, the said Francis
Daniell, by an instrument in writing under my hand and scal, 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 Francis Daniell, do hereby de-
clare the nature of my 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:

page_text: My improvements in stamp heads consist in forming the working
parts of the same, or those most exposed to wear, of cast or wrought
steel, the body of the stamp head being of cast iron as usual or of
wrought iron.
Figures 1, 2, 3, and 4, represent stamp heads constructed according
to my Invention. I attach the steel portion or shoe A, to the stamp
head B, by a dovetail or rib C, fitting into a corresponding groove D,
either in the shoe or stamp head, and I further secure the shoe in its
place by a bolt or bolts, cotter or cotters, passing through the cast iron
socket and dovetail or rib, or by other suitable fastenings. This mode
of construction will be found of considerable advantage in stamping tin
and other ores, which are now deteriorated by particles of iron worn
or derived from the abrasion of the stamp head during the operation of
stamping. The particles of iron being of similar density to tin ores or
oxide of tin become inseparably mixed with the ores, and unite with
the inetal in the sinelting process, thus materially depreciating its value.
The steel shoc can be readily removed when worn, and replaced by a
new one, whereby a material saving in the cost of stamp heads will
be effected.
And having now described the nature of my said Invention, and in
what manner the same is to be performed, I declare that I claim the
construction of stamp heads faced or shod with steel, as herein-before
described.
In witness whereof, I, the said Francis Daniell, have hereunto
set my hand and seal, this Twenty-sixth day of April, Oue
thousand eight hundred and fifty-three.
F. DANIELL. (L.8.)