AN IMPROVED METHOD OF COATING THE INTERIOR SURFACE OF LEAD AND LEAD COMPOSITION PIPES WITH TIN OR. ITS ALLOYS
Year: 1861

page_text: LETTERS PATENT to Frederick Bennett, of Upper Works, Bagillt, in the
County of Flint, Manager, for the Invention of "AN IMPROVED METHOD
OF COATING THE INTERIOR SURFACE OF LEAD AND LEAD COMPOSITION PIPES
WITH TIN OR. ITS ALLOYS."
Sealed the 4th March 1862, and dated the 5th September 1861.
PROVISIONAL SPECIFICATION left by the said Frederick Bennett at
the Office of the Commissioners of Patents, with his Petition, on the
5th September 1861.
I, FREDERICK BENNETT, of Upper Works, Bagillt, in the County of Flint,
Manager, do hereby declare the nature of thesaid Invention for "AN IMPROVED
METHOD OF COATING THE INTERIOR SURFACE OF LEAD AND LEAD COMPOSITION PIPES
WITH TIN OR ITS ALLOYS," to be as follows:-
My Invention relates to those lead or lead composition pipes, which are
manufactured by hydraulic pressure, and consists in forming the core or
mandril over or round which the pipes are formed hollow or tubular, and in
causing the tube or hollow in the mandril to communicate with a reservoir or
supply of tin or alloy of tin, the level of which is maintained at such a point
that the tin will just overflow the lip or upper end of the tubular mandril. I
regulate the thickness of the coating on the inner surface of the lead pipe by
pressure. As the leaden tube is formed over the hollow core or mandril, so it
receives a uniform coating on the interior of the tin or tiu alloy, which is képt
flowing over the lip of the mandril.

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 5th March 1862.
.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
BENNETT, of Upper Works, Bagillt, in the County of Flint, Manager, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifth day of September, 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, ny 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 IMPROVED METHOD OF COATING THE INTERIOR SURFACE OF LEAD
AND LEAD COMPOSITION PIPES WITH TIN OR ITS ALLOYS," 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 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 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, referenco being had to the Drawings hereunto annexed,
that is to say:
My Invention relates to those lead or lead composition pipes which are
manufactured by hydraulic pressure, and consists in forming the core or
mandril over of round which the pipes are formed hollow or tubular, and in
causing the tube or hollow in the mandril to communicate with a reservoir or
supply of tin or alloy of tin, the level of which is maintained at such a point
that the tin will just overflow the lip or upper end of the tubular mandril. As
the leaden tube is formed over the hollow core or mandril, so it receives a

page_text: uniform coating on the interior of the tin or tin alloy, which is kept flowing
over the lip of the mandril.
Figure 1 of the accompanying Drawings is a vertical section of so much of
a hydraulic press as will be necessary to illustrate the method of coating the
interior surface of pipes according to my Invention; Figure 2 is a transverse
section through the line x, y, and Figure 3 is a similar view, through the
line u, v, of Figure 1.
a is the hollow portion of the core or mandril; b is a passage by which
liquid tin or tin-alloy is led from the spoute to the mandril; d is the lead or
lead composition reservoir; e is an annular space between the hollow mandril
a and the die f. Upon the hydraulic press being set in motion, lead is forced
up between the dief and the mandril in the ordinary manner; when the pipe
reaches the lip g liquid tin is spread over its internal surface, and the coated
pipe passes on to the solid portion of the mandril, the lead and tin become
consolidated, and the finished pipe is carried away in the ordinary manner.
Figure 4 is a section, and Figure 5 an elevation on an enlarged scale, of a
portion of the mandril, in which the tin or tin alloy flows over the lipg; and
Figure Gis a section of a mandril in which the tin or tin alloy flows over the
upper end.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, Ideclare that I claim, the improved method
of coating the interior surface of lead and lead composition pipes with tin o
its alloys, by means of a hollow core or mandrel, as herein-before described.
In witness whereof, I, the said Frederick Bennett, have hereunto set
my hand and seal, this Third day of March, One thousand eight
hundred and sixty-two.
FREDERICK BENNETT. (L.s.)