IMPROVEMENTS IN AP- PLYING A COATING TO THE SURFACES OF IRON PIPES AND TUBES
Year: 1840

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
FARGER EMMERSON, of 38, Manor Place, Walworth, in the County of Surrey,
Gentleman, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Third day of November, in the fourth year of Her reign did,
for Herself, Her heirs and successors, give and grant unto me, the said Richard
Farger Emmerson, Her_especial licence, full power, sole, privilege and autho-
rity, that I, the said Richard Farger Emmerson, my exors, admors, and
assigns, or such others as I, the said Richard Farger Emmerson, my exors,
adiñiors, 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 AP-
PLYING A COATING TO THE SURFACES OF IRON PIPES AND TUBES;" in which said
Letters Patent is contained a proviso that I, the said Richard Farger Em-
merson, 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 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
annear

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Richard Farger Emmerson, do hereby declare that the nature of my In-
vention, 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)-
My Invention relates to coating the surfaces of wrought-iron welded tubes
and cast-iron tubes with tin, or alloy of tin. And, in order to give the best
information in my power, I will proceed to explain 'the means pursued by me
in carrying out my Invention:-I first cleanse the surfaces to be coated by
removing any scale, and if the ends of the tubes have been operated on by
a screw tool, and oil had been used in such process before.removing the
scale by pickling, I heat the ends or other parts of the tubes touched with
oil, till the surfaces are freed from oil; I then immerse the tubes in suitable
pickling liquor. I used liquor composed of two parts muriatic acid to three
parts of clear water, and allow the tubes to remain in pickle till the scale
comes off easily by scouring with sand. The scale being removed, and the
interior and exterior surfaces being clean, and washed in clean water and free
from scale, such surfaces will appear of a light grey color, when they are in
'a condition to undergo the next process, which consists of immersing the
cleansed tubes into a bath composed of muriatic acid and zinc, or spelter, the
proportions of about three ounces of zinc or spelter to each pint of muriatic
acid, the zinc or spelter being dissolved by the acid. The tubes are to be so
immersed and passed into this liquor as to cause tliem to be acted on inside
and out by the liquor, the tubes in this process only remaining in the liquor
so long as to insure such action; and I usually pass one end of the tube
under the liquor, and move the tube forward into. the trough or vessel con-
taining the liquor, so that a stream will pass through the tube, passing the
tube out at the other end of the trough or vessel to that at which it was first
introduced. The tube is next to have a quantity of powdered rosin placed
within and dusted over the external surface, so as to cover both surfaces as com-
pletely as possible. The tube is then to be passed into a vessel containing
tin, or alloy of tin, in a melted state, as is well understood when making tin
plates, and I conduct the tube end forwards through the melted metal, so as
to obtain a current of the metal through the tube, by which means the tubes
so treated will become coated, the surfaces of the tubes being wiped with tow
on being removed from the melted tin or alloy; and if I find on examination
that any of the parts are defective, I again submit them to the bath of acid
and zinc or spelter, and again use the rosin, and then submit the tube to
the melted metal. I would remark, that in like manner the short tubes

page_text: or fittings for such welded iron and cast-iron tubes may be treated in order
to coat their surfaces; and it will be evident, that if only the interior surfaces
are to be coated, then the scale is only to be removed from the interior by
filling it with suitable pickling liquid.
Having thus described the nature of my Invention, and the manner of per-
forming the same, I would have it understood, that I do not claim any of
the processes herein described when employed for other purposes than that
of preparing for and coating welded and cast-iron tubes with tin, or alloy of
tin, and I do not confine myself to the precise means herein described so loug
as my Invention be retained. But what I claim is, the coating of the surfaces
of welded iron, iron, and cast-iron tubes with tin, or alloy of tin, as herein
described.
In witness whereof, I, the said Richard Farger Emmerson, have hereunto
set my hand and seal, this Third day of May, in the year of our Lord
RICH FARGER (L.S.) EMMERSON.
AND BE IT REMEMBERED, that on the Third day of May, in the year
of our Lord 1841, the aforesaid Richard Farger Emmerson 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.
Inrolled the Third day of May, in the year of our Lord One thousand
eight hundred and forty-one.