AN IMPROVEMENT IN FIXING THE TUBULAR FLUES OF STEAM BOILERS
Year: 1857

page_text: LETTERS PATENT to Arnold Goodwin, of 69, Guildford Street, London,
S. E., Engineer, for the Invention of "AN IMPROVEMENT IN FIXING THE
TUBULAR FLUES OF STEAM BOILERS."
Scaled the 28th April 1857, and dated the 12th January 1857.
PROVISIONAL SPECIFICATION left by the said Arnold Goodwin at the.
Office of the Commissioners of Patents, with his Petition, on the
12th January 1857.
J, ARNOLD GOODWIN, of 69, Guildford Street, London, S. E., Engineer, do
hereby declare the nature of the Invention for "AN IMPROVEMENT IN FIXING THE
TUBULAR FLUES OF STEAM BOILERS," to be as follows:-
This Invention bas for its object an improvement in fixing the tubular flues
of steam boilers. For this purpose the ends of each of the tubular flues are
formed with male screw threads, and on the inside of the boiler a screw nut or
shoulder is screwed or formed on to each of such screws, and a washer or ring
of sheet iron and a washer or ring of vulcanized india-rubber are also placed
on each of such male screws. On the outside of the boiler and on each of
such male screws a screw nut is placed, or other mode of fixing may be resorted
to. Hence, by screwing up the nuts on their respective male screws the
tubular flues will be securely fixed fluid-tight in the boilers.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Arnold Goodwin in the Great Seal Patent Office on the
8th July 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ARNOLD
GOODWIN, of 69, Guildford Street, London, S. E., Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of January, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Arnold Goodwin, Her special licence that I, the said Arnold
Goodwin, my executors, administrators, and assigns, or such others as I, the
said Arnold Goodwin, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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
FIXING THE TUBULAR FLUES OF STEAM BOILERS," upon the condition (amongst
others) that I, the said Arnold Goodwin, 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 Arnold Goodwin, do hereby declare
the nature of the 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, that is to say:-
This Invention has for its object an improvement in fixing the tubular flues
of steam boilers. For this purpose the ends of each of the tubular flues are
formed with male screw threads, and on the inside of the boiler a screw nut or
shoulder is screwed or formed on to each of such screws, and a washer or ring
of sheet iron and a washer or ring of vulcanized india-rubber are also placed
on each of such male screws. On the outside of the boiler and on each of
such male screws a screw nut is placed, or other mode of fixing may be
resorted to. Hence, by screwing up the nuts on their respective male screws
the tubular flues will be securely fixed fluid-tight in the boilers.
And in order that my said Invention may be most fully understood and

page_text: readily carried into effect, I will proceed to describe the Drawing hereunto
annexed.
DESCRIPTION OF THE DRAWING.
The Drawing shows a longitudinal section of part of the tube plate of a
steam boiler with part of one of the tubular flues, which is fixed thereto
according to the method which I prefer to employ. a, a, is the tube plate;
and b is the tubular flue, having a screw thread cut on it; c is a nut, which is
screwed on to the tube within the boiler; d is a metal washer, resting against
the nut c, and which presses the vulcanized india-rubber ring e against the
tube plate a, so as to make a tight joint; fis a nut, which is screwed on to the
tube on the outside of the boiler. By fixing the tubular flues in the tube
plate in this way the joints will remain tighter than if they were made in the
ordinary manner, as the tubes are, by compressing the vulcanized india-rubber
rings, free to expand with the heat without forcing out the flue plate.
In witness whereof, I, the said Arnold Goodwin, have hereunto set my
hand and seal, this Seventh day of July, in the year of our Lord One
thousand eight hundred and fifty-seven.
Witness,
S. CARPMAEL.
ARNOLD GOODWIN. (L.s.)