IMPROVE- MENTS IN THE MANUFACTURE OF TINNED LEAD PIPES, AND IN THE APPARATUS EMPLOYED THEREIN
Year: 1862

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields,
in the County of Middlesex, and of 166, Buchanan Street, in the City
of Glasgow, North Britain, Gentleman, for the Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF TINNED LEAD PIPES, AND IN THE APPARATUS
EMPLOYED THEREIN."-A communication from abroad by Charles Felix
Sebille, of Paris, in the Empire of France, Manufacturer.
Sealed the 31st October 1862, and dated the 28th May 1862
PROVISIONAL SPECIFICATION left by the said John Henry Johnson at
the Office of the Commissioners of Patents, with his Petition, on the
28th May 1862.
I, JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of
Middlesex, and of 166, Buchanan Street, in the City of Glasgow, North
Britain, Gentleman, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF TINNED LEAD PIPES, AND IN THE
APPARATUS EMPLOYED THEREIN," a communication from abroad by Charles.
Felix Sebille, of Paris, in the Empire of France, Manufacturer, to be as
follows:-
This Invention relates to an improved mode of tinning or coating the
interior and exterior surfaces of lead pipes made by hydraulic pressure, and

page_text: consists in applying one or more layers or coatings of tin over the lead surface,
so as to obtain coatings of different thicknesses as desired. This is accomplished
by having a reservoir of molten tin placed above the tinning tool, so as
to supply the tin constantly thereto. The tin is introduced to the interior
of the pipe by an opening in the mandrill, which regulates the diameter of
the same, the tin being applied continuously as fast as the tube is made.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Henry Johnson in the Great Seal Patent Office on
the 28th November 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN HENRY
JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex, and of
166, Buchanan Street, in the City of Glasgow, North Britain, Gentleman,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of May, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Henry Johnson, Her special license, that I, the said John Henry
Johnson, my executors, administrators, and assigns, or such others as I,
the said John Henry Johnson, my executors, administrators, or 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 Inven-
tion for "IMPROVEMENTS IN THE MANUFACTURE OF TINNED LEAD PIPES, AND IN
THE APPARATUS EMPLOYED THEREIN," a communication from abroad by Charles
Felix Sebille,. of Paris, in the Empire of France, Manufacturer, upon the
condition (amongst others) that I, the said John Henry Johnson, my
executors or administrators, by an instrument in writing under my hand and
seal, or under the hand and seal of one of them, 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 John Henry Johnson, do hereby
declare the nature of the said Invention, and in what manner the same

page_text: is to be performed, to be particularly described and ascertained in and by
the following statement, that is to say:-
The said Invention relates to an improved system or mode of tinning or
coating the interior and exterior surfaces of lead pipes made by hydraulic
pressure, and consists of a peculiar mode of applying one or more layers or
coatings of tin over the lead surface of the pipe, so as to obtain coatings of
different thicknesses, as desired. This is accomplished by having a reservoir
of molten tin placed above the tinning tool, so as to supply the tin constantly
thereto. The tin is introduced to the interior of the pipe by an opening in
the mandrill, which regulates the diameter of the same, the tin being applied
continuously as fast as the tube is made, either to the interior or exterior
thereof. By this system tinned tubes may be obtained of any indefinite length,
whilst by the ordinary method it is necessary to cut the pipe in order to
introduce a fresh supply of tin when the first is expended. The thickness of
the tinning for pipes of all diameters depends, as herein-before stated, on the
number of coats or layers of tin which are applied one over the other, and
consequently facility is afforded for applying a covering or lining of tin of any
thickness desired.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider to be
novel and original, and therefore claim as the Invention secured to me by
the herein-before in part recited Letters Patent, is the system or mode of
coating lead pipes with tin, and the means employed therefor, as herein-before
described.
In witness whereof, I, the said John Henry Johnson, have hereunto set
my hand and seal, this Twenty-seventh day of November, One thousand
J. HENRY JOHNSON. (L.S.)