AN IM- PROVED MANUFACTURE OF BOILERS USED FOR THE PURPOSE OF GENERATING STEAM;
Year: 1833

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
FREDERICK MUNTZ, of Birmingham, in the County of Warwick, Roller of
Metals, send greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-eighth day of October, in the fourth year of His
reign, did, for Himself, His heirs and successors, give and grant unto me,
the said George Frederick Muntz, His especial license, full power, sole privi-
lege and authority, that I, the said George Frederick Muntz, my exors,
admors, and assigns, or such others as I, the said George Frederick Muntz,
my exors, admors, or assigns, should at any time agree with, and no others,
from time to time and at all times during the term of years therein expressed,
should and lawfully might make, use, exercise, and vend, within England,
Wales, and the Town of Berwick-upon-Tweed, my Invention of "AN IM-
PROVED MANUFACTURE OF BOILERS USED FOR THE PURPOSE OF GENERATING STEAM;"
in which said Letters Patent is contained a proviso that I, the said George
Frederick Muntz, shall cause a particular description of the nature of my said
Invention, and in what manner the same is to be performed, to be inrolled
in His said Majesty's High Court of Chancery within six calendar months
next and immediately after the date of the said in part recited Letters Patent,
as in and by the same, reference being thereunto had, will more fully and at
large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
George Frederick Muntz, do hereby declare the nature of my said Inven

page_text: tion to consist in the application to the manufacture of steam boilers of a
certain alloy of copper and zinc, the nature of which is set forth and described
in the Specifications of two certain Patents granted to me, the said George
Frederick Muntz, the one bearing date at Westminster, the Twenty-second
day of October, One thousand eight hundred and thirty-two, entitled "An
Improved Manufacture of Metal Plates for Sheathing the Bottoms of Ships
or other such Vessels," the other also bearing date at Westminster, the
Seventeeth day of December, One thousand eight hundred and thirty-two,
entitled "An Improved Manufacture of Bolts and other the like Ships' Fasten-
ings," Specifications of which said two last-mentioned Patents were duly
inrolled in His said Majesty's High Court of Chancery within the time limited
for that purpose, reference being had thereto respectively will more fully
appear; and which said Specifications contain the following description of the
said alloy (that is to say):-
<<
"
"The said alloy is composed of copper and zinc of the following qualities
"and proportions (that is to say):-I take fine copper, called best selected
copper, and good zinc, and melt them together in the usual way, in any
proportion between fifty parts of copper to fifty parts of zinc, and sixty-three
parts of copper to thirty-seven parts of zinc, both of which extremes, and
all intermediate proportions, will work at a red heat; but I prefer in all
cases the alloy to consist of about sixty parts of copper to forty parts of
zinc. This compound I cast into ingots of any convenient weight, and then
heat them to a red heat, and roll them into sheets, or hammer or otherwise
work them up into bolts, in the same manner as copper is rolled and
worked, only taking care not to overheat the metal so as to produce fusion,
" and not to put it through the rollers or hammer or work it after the heat
"has left it too much, say when the red heat goes off."
Now whereas it is evident that the said alloy may also be made from a
compound of copper and calamine by cementation, taking care that the
quantity of calamine shall be such that the zinc extracted from it will be in
some of the same proportions to the copper as before mentioned; but as it is
very difficult to make the copper take up the necessary quantity of zinc by
this process it is more expensive; it is equally evident that brass of very
good quality, with the addition of zinc requisite to make the proper propor-
tions of copper and zinc, will likewise work and roll hot, and answer the pur-
pose, but is again a more expensive mode; I therefore prefer and adopt
the process herein-before first described for making the said alloy.
Now whereas the said alloy may be made into rivets as well as bolts, or
drawn into pipes, both which may be necessary for the purpose of making

page_text: steam engine boilers; and I claim as my Invention the application of the said
alloy to the manufacture of boilers used for the purpose of generating steam, for
steam boilers manufactured out of the said alloy, whereby they may be made
more light, durable, and cheap than where copper is used. And such:
my Inven-
tion being, to the best of my knowledge and belief, entirely new, and never
before used within that part of His said Majesty's United Kingdom of Great
Britain and Ireland called England, His said Dominion of Wales, or Town of
Berwick-upon-Tweed, I do hereby declare this to be my Specification of the
same, and that I do verily believe this my said Specification doth comply in
all respects, fully and without reserve or disguise, with the proviso in the
said herein-before in part recited Letters Patent contained; wherefore I do
hereby claim to maintain exclusive right and privilege to my said Invention.
In witness whereof, I, the said George Frederick Muntz, have hereunto
set my hand and seal, this Seventeenth day of March, in the year of
our Lord One thousand eight hundred and thirty-four