IMPROVEMENTS CONNECTED WITH THE INTERNAL FIRE TUBES OF LOCOMOTIVE, MARINE, AND OTHER BOILERS
Year: 1869

page_text: LETTERS PATENT to William Maddick, of the City of Manchester,
in the County of Lancaster, for the Invention of "IMPROVEMENTS
CONNECTED WITH THE INTERNAL FIRE TUBES OF LOCOMOTIVE, MARINE, AND
OTHER BOILERS."
Sealed the 30th July 1869, and dated the 3rd February 1869.
PROVISIONAL SPECIFICATION left by the said William Maddick at the
Office of the Commissioners of Patents, with his Petition, on the
3rd February 1869.
I, WILLIAM MADDICK, of the City of Manchester, in the County of
Lancaster, do hereby declare the nature of the said Invention for
"IMPROVEMENTS CONNECTED WITH THE INTERNAL FIRE TUBES OF LOCOMOTIVE,
MARINE, AND OTHER BOILERS," to be as follows:-
This Invention relates to those tubes which are surrounded by the
water, and through which the heat passes, and consists in coating or
covering the exteriors of the tubes with lead, either in the state of
sheet metal or by dipping them into lead in a molten state, which
operations are for the purpose of preventing the tubes from incrustation.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Maddick in the Great Seal Patent Office
on the 2nd August 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
MADDICK, of the City of Manchester, in the County of Lancaster, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of February, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Maddick, Her special license that I,
the said William Maddick, my executors, administrators, and assigns, or
such others as I, the said William Maddick, my 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 "IMPROVEMENTS CONNECTED WITH THE
INTERNAL FIRE TUBES OF LOCOMOTIVE, MARINE, AND OTHER BOILERS," upon
the condition (amongst others) that I, the said William Maddick,
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 William Maddick, 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 (that is to say):-
This Invention relates to those tubes which are surrounded by the
water and through which the heat passes, and consists in coating or

page_text: covering the exteriors of the tubes with lead, either in the state of sheet
metal or by dipping them into lead in a molten state, which operations
are for the purpose of preventing the tubes from incrustation and corro-
sion. The tubes may be coated or covered with the lead in various ways,
but in practice I have found the following method to be very effectual :-
I take the tubes and tin them in the ordinary way of tinning, after
which they are placed in moulds and a coating of lead cast or floated
around them; they are then passed through dies or rolls in any con-
venient manner to reduce the lead to the thickness required.
Having now described the nature and particulars of my said Inven-
tion, and the manner in which the same is to be performed, I desire
it to be understood that I claim, the coating or covering with lead of
those tubes of locomotive, marine, and other boilers which are surrounded
by water and through which the heat passes for the purpose of preventing
such tubes from incrustation and corrosion.
In witness whereof, I, the said William Maddick, have hereunto set
my hand and seal, this Thirty-first day of July One thousand
eight hundred and sixty-nine.
WILLIAM MADDICK. (L.S.)