AN IMPROVEMENT IN THE MANUFACTURE OF SHEET-METAL PIPES
Year: 1854

page_text: LETTERS PATENT to John McGaffin, of Liverpool, in the County of
Lancaster, for the Invention of "AN IMPROVEMENT IN THE MANUFACTURE
OF SHEET-METAL PIPES."
Sealed the 26th September 1854, and dated the 1st August 1854.
PROVISIONAL SPECIFICATION left by the said John McGaffin at the
Office of the Commissioners of Patents, with his Petition, on the 1st
August 1854.
I, JOHN MCGAFFIN, of Liverpool, in the County of Lancaster, do hereby
declare the nature of the Invention for "AN IMPROVEMENT IN THE MANUPAC-
TURE OF SHEET-METAL PIPES" to be as follows:-
This Invention consists of manufacturing sheet-metal pipes, by employing
for this purpose corrugated sheet metal, and, by preference, sheet iron coated
with zinc. For this purpose, corrugated sheet metal is bent into the size or
diameter of pipes required, and the edges are riveted or fixed by screws and
nuts, or otherwise; and, according to the length required, several lengths of
sheet metal are connected together before or after making them into form.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John McGaffin in the Great Seal Patent Office on the 11th
January 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MCGAFFIN, of Liverpool; in the County of Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of August, in the year of our Lord One
thousand eight hundred and fifty-four, in the eighteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
John McGaffin, Her special licence, that I, the said John McGaffin, my
executors, administrators, and assigns, or such others as I, the said John
McGaflin, 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 "AN IMPROVEMENT IN THE
MANUFACTURE OF SHEET-METAL PIPES," upon the condition (amongst others)
that I, the said John McGaffin, by an instrument in writing under my hand
and seal, 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 tho said Letters Patent.
NOW KNOW YE, that I, the said John McGaffin, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof (that is to say) :-
-
This Invention consists of manufacturing sheet-metal pipes, by employing
for this purpose corrugated sheet metal, and, by preference, sheet iron coated
with zinc. For this purpose, corrugated sheet metal is bent into the size or
diameter of pipes required, and the edges are rivited or fixed by screws and
nuts, or otherwise; and, according to the length required, several lengths
or sheets of metal are connected together before or after making them into
form.
The Drawing shows a corrugated pipe, made by riviting several sheets
together, and making the whole into a cylinder of any desired length, according

page_text: to the object for which such pipes are to be used. The corrugations are around
the pipes.
In witness whereof, I, the said John McGaffin, have hereunto set
my hand and seal, this Sixth day of January, in the year of our Lord
One thousand eight hundred and fifty-five.
Witness,
GEORGE ANDERSON,
Book Keeper,
Liverpool.
JOHN MCGAFFIN. (L.S.)