AN IMPROVEMENT IN THE MANUFACTURE OF SPELTER
Year: 1861

page_text: LETTERS PATENT to Frederick Bennett, of Bagillt, in the County of Flint,
Manager, for the Invention of "AN IMPROVEMENT IN THE MANUFACTURE OF
SPELTER."
Sealed the 26th December 1861, and dated the 29th October 1861.
PROVISIONAL SPECIFICATION left by the said Frederick Bennett at
the Office of the Commissioners of Patents, with his Petition, on
the 29th October 1861.
I, FREDERICK BENNETT, of Bagillt, in the County of Flint, Manager, do
hereby declare the nature of the said Invention for "AN IMPROVEMENT IN THE
MANUFACTURE OF SPELTER," to be as follows:-
My Invention consists in incorporating or combining chloride of sodium or
chlorine in any form in which it may be present or in which it may be evolved
under heat, with the materials now generally used in the manufacture of spelter;
and I carry my Invention into effect as follows:-I first calcine the blend
calamine or other zinc ore in the usual manner; next mix such ore with coal,
coke, or other carbonaceous matter, and add chlorine, and that by preference
in the form of chloride of sodium (common salt); I then follow the usual pro-
cesses of condensation and collection.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Bennett in the Great Seal Patent Office on the
29th April 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
BENNETT, of Bagillt, in, the County of Flint, Manager, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of October, in the year of our
Lord One thousand eight hundred. and sixty-one, in the Twenty-fifth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Frederick Bennett, Her special licence that I, the said Frederick
Bennett, my executors, administrators, and assigns, or such others as I, the
said Frederick Bennett, my executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times there-
after 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
THE MANUFACTURE OF SPELTER," upon the condition (amongst others) that I,
the said Frederick Bennett, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should par-
ticularly 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 Frederick Bennett, do hereby declare
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 thereof, that is to say:-
My Invention consists in mixing or incorporating chloride of sodium or
other substances containing chlorine, to be herein-after named, with the
materials now generally used in the manufacture of spelter after their cal-
cination, and then subjecting the materials so mixed to the usual smelting
process.
I carry my Invention into effect as follows:-I first calcine the blende,
calamine, or other zinc ore in the usual manner; next mix such ore with coal,
coke, or other carbonaceous matter, and add chloride of sodium, common salt.
The proportions I have found best in practice are about four per cent. by weight
of the chloride of sodium to the calcined ore, but this may be somewhat varied
without injuriously affecting the result; I then subject these mixed materials

page_text: to the ordinary smelting or deoxidating process in the retorts or other
usual apparatus, the product being condensed and collected in the usual
manner.
Instead of chloride of sodium I use other substances containing chlorine,
namely, chloride of lime, muriatic acid, or chloride of calcium, in the same
proportions and at the same stage of the process, but I prefer chloride of
sodium.
In witness whereof, I, the said Frederick Bennett, have hereunto set
my hand and seal, this Twenty-ninth day of April, One thousand eight
hundred and sixty-two.
F. BENNETT. (L.B.)