IMPROVEMENTS IN SMELTING CERTAIN SUBSTANCES CONTAINING LEAD
Year: 1852

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HUGH
LEE PATTINSON, of Scott's House, near Newcastle-upon-Tyne, Manufacturing
Chemist, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the First day of May, One
thousand eight hundred and fifty-two, in the fifteenth year of Her reign, did,
for Herself, Her heirs, and successors, give and grant unto me, the said Hugh
Lee Pattinson, my exors, adññiors, and assigns, Her especial license, full power,
sole privilege and authority, that I, the said Hugh Lee Pattinson, my exors,
adiiors, and assigns, or such others as I, the said Hugh Lee Pattinson, my
exors, adiñors, 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 "IMPROVEMENTS
IN SMELTING CERTAIN SUBSTANCES CONTAINING LEAD;" in which said Letters
Patent is contained a proviso, that I, the said Hugh Lee Pattinson, shall cause
a particular description of the nature of my said Invention, and in what
manner the same is to be performed, by an instrument in writing under my
hand and seal, to be inrolled in Her 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
Hugh Lee Pattinson, do hereby declare that the nature of my said Invention,

page_text: and the manner in which the same is to be performed, are fully described and
ascertained in and by the following statement thereof, that is to say ;-
I am at present working a Patent I took out a few years ago for the manu-
facture of a new pigment, which I have called "Pattinson's oxichloride of
lead." In this manufacture very finely ground calena is exposed to the
action of hydrochloric acid, by which much of the sulphuret is converted into
chloride of lead, and when this latter is dissolved out by boiling water there
remains a residuum, consisting of some calena which has escaped the action
of the hydrochloric acid, all the silver contained in the original calena and all
the earthy matter or other substances insoluble in hydrochloric acid. If this
residuum contains much calena it is again subjected to the action of the acid;
but there still remains a residuum containing lead, silver, and earthy or other
matter, which residuum it is exceedingly difficult to smelt in the ordinary way.
Now, my
Invention consists in a peculiar mode of treating this residuum (or
the different residua I obtain after acting upon lead ore with hydrochloric acid,
and dissolving out the chloride of lead as detailed), and is as follows:-
I take the residuum in a dry state, and to four parts by weight I add one
part of common salt and one part of metallic iron in small pieces, such as
borings or turnings, or cast iron granulated by being melted and suffered to
run into cold water. This mixture of four parts residuum, one part common
salt, and one part iron, I melt in the common reverberatory furnace used in
lead smelting, and when the whole is thoroughly fused I run it off into a
conical iron vessel; when the mass has cooled sufficiently I turn it out
of the conical iron vessel and detach the lead produced from the slag, which
latter is afterwards smelted in the slag hearth.
I do not confine myself rigidly to the proportions of residuum, common salt,
and iron I have mentioned, but I claim, as my Invention, the smelting of the
residuum or residua arising in the manufacture of "Pattinson's oxichloride of
lead," by fusing it with common salt and disintegrated or granulated iron.
In witness whereof, I, the said Hugh Lee Pattinson, have hereunto set
my hand and seal, this Twenty-seventh day of October, in the-year of
Land One thousand eight hundred and fifty-two.
HUGH LEE (L.s.) PATTINSON.
Signed, sealed, and delivered (being first
duly stamped) by the within-named
Hugh Lee Pattinson in the presence of

page_text: AND BE IT REMEMBERED, that on the Twenty-seventh day of October,
in the year of our Lord 1852, the aforesaid Hugh Lee Pattinson came before
our said Lady the Queen in Her Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute made for that purpose.
Enrolled the Thirtieth day of October, in the year of our Lord One
Enrolled the Thirtieth day of October, in the year of our Lord One
thousand eight hundred and fifty-two.