AN IMPROVEMENT IN PREPARING YELLOW METAL SHEATHING
Year: 1858

page_text: LETTERS PATENT to George Frederick Muntz, of French Walls, near
Birmingham, for the Invention of "AN IMPROVEMENT IN PREPARING
YELLOW METAL SHEATHING."
Sealed the 2nd August 1858, and dated the 21st May 1858.
PROVISIONAL SPECIFICATION left by the said George Frederick Muntz
at the Office of the Commissioners of Patents, with his Petition, on the
21st May 1858.
I, GEORGE FREDERICK MUNTZ, of French Walls, near Birmingham, do
hereby declare the nature of the Invention for "AN IMPROVEMENT IN PRE-
PARING YELLOW METAL SHEATHING," to be as follows:-
This Invention has for its object an improvement in preparing yellow metal
sheathings. Heretofore yellow metal sheathing, or Muutz' metal, has been
manufactured by rolling hot, though it is also known to be capable of rolling
cold; it has, however, been the practice to apply such sheathing to a ship's
bottom in the annealed or softened state. Now my present improvement
consists of rolling such sheathing metal cold after it has been annealed, in
order that such sheathing metal may be hardened by such cold rolling, and
applied to a ship's bottom in a hardened state.

page_text: "
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Frederick Muntz in the Great Seal Patent Office
on the 29th October 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
FREDERICK MUNTZ, of French Walls, near Birmingham, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her, Letters
Patent, bearing date the Twenty-first day of May, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said George Frederick Muntz, Her special licence that I, the said George
Frederick Muntz, my executors, administrators, and assigns, or such others
as I, the said George Frederick Muntz, 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
"AN IMPROVEMENT IN PREPARING YELLOW METAL SHEATHING," upon the condition
(amongst others) that I, the said George Frederick Muntz, 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 George Frederick Muntz, 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:
This Invention has for its object an improvement in preparing yellow metal
sheathing. Heretofore yellow metal sheathing or Muntz' metal has been
manufactured by rolling hot, though it is also known to be capable of rolling
cold; it has, however, been the practice to apply, such sheathing to a ship's
bottom in the annealed or softened state. Now my present improvement
consists of rolling such sheathing metal cold after it has been annealed, in
order that such sheathing metal may be hardened by such cold rolling, and
applied to a ship's bottom in a hardened state.
Having thus stated the nature of my said Invention, I will proceed more
fully to describe the manner of performing the same.
The object of my Invention, as above stated, is to-manufacture hard yellow

page_text: sheathing metal for the sheathing of ships and vessels, in order that the same
may be applied in place of yellow sheathing metal which in its manufacture
has been annealed after the final rolling. And I may here state that I have
by a series of experiments ascertained that hard rolled yellow, or Muntz'
sheathing metal, does not wear away or become so quickly reduced in
thickness as like yellow metal which has been annealed as heretofore after
the final rolling.
In carrying out my Invention, I prefer to roll the yellow metal hot till it
has been brought to within about five per cent. of the desired guage, than to
anneal the metal and to allow it to cool, and when nearly cold, further to
reduce it by means of a pair of very true rolls to the guage desired. I would
remark that I do not confine myself to the above process so long as the yellow
sheathing metal is finished in the hard state in place of being finished by
annealing, as has heretofore been the practice.
In witness whereof, I, the said George Frederick Muntz, have hereunto
set my hand and seal, this Eighth day of October, in the year of our
Lord One thousand eight hundred and fifty-eight.
Witness,
JOHN EDKINS.
G. F. MUNTZ. (L.S.)