IMPROVEMENTS IN THE CON- STRUCTION OF STEAM BOILERS
Year: 1856

page_text: LETTERS PATENT to Benjamin Goodfellow, of Hyde, in the County of
Chester, Engineer, for the Invention of "IMPROVEMENTS IN THE CON-
STRUCTION OF STEAM BOILERS."
Sealed the 10th March 1857, and dated the 24th December 1856.
PROVISIONAL SPECIFICATION left by the said Benjamin Goodfellow
at the Office of the Commissioners for Patents, with his Petition, on the
24th December 1856.
I, BENJAMIN GOODFELLOW, of Hyde, in the County of Chester, Engineer, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN THE
CONSTRUCTION OF STEAM BOILERS," to be as follows:-
The nature of my Invention consists in so constructing steam boilers that
the stays usually required for strengthening them are dispensed with. By
this means the injuries caused by the unequal expansion and contraction of
the parts composing the boiler are avoided. In performing my Invention I
construct two cylinders of different diameters, the larger one forming the shell
or outer casing, and the smaller one the flue. These cylinders are connected
at each end by plates of sufficient strength to resist the power of the steam,
and the relative diameters of the cylinders must be such that sufficient space
is left between them for the water to be evaporated within the outer shell, and
for the end plates to yield if the flue should expand more than the outer shell,
or vice versa. The steam generated is collected in a dome or cylinder placed
above the boiler in the ordinary manner.

page_text: "
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Benjamin Goodfellow in the Great Seal Patent Office on
the 17th June 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
GOODFELLOW, of Hyde, in the County of Chester, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fourth day of December, in the year of our
Lord One thousand eight hundred and fifty-six, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Benjamin Goodfellow, Her special licence that I, the said Benjamin
Goodfellow, my executors, administrators, and assigns, or such others as I; the
said Benjamin Goodfellow, 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 "IMPROVE-
MENTS IN THE CONSTRUCTION OF STEAM BOILERS," upon the condition (amongst
others) that I, the said Benjamin Goodfellow, 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 In-
vention, 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 Benjamin Goodfellow, 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):
The nature of my Invention consists in so constructing steam boilers that
the stays usually required for strengthening them are dispensed with. By
this means the injurious effects of the unequal expansion and contraction of
the parts composing the boiler when made in the usual manner are avoided...
And in order that my Invention may be fully understood and readily
carried into effect, I will proceed to describe the accompanying Sheet of
Drawings, reference being had to the figures and letters marked thereon.
Fig. 1 is a longitudinal section of a steam boiler constructed according to
my improvements; Fig. 2 is a transverse section; and Fig. 3, a plan of the
same. a is the outer cylindrical shell or casing of the boiler; and is an
inner cylinder containing the fire-grate c, and forming the flue. The cylinders

page_text: are connected at each end by the plates d, which are of sufficient strength to
resist the power of the steam, and the relative diameters of the outer and
inner cylinders must be such that sufficient space is left between them for the
water to be evaporated and for the end plates to yield if the inner cylinder or
flue should expand more than the outer cylinder, or vice versa. The steam
generated is collected in the dome or cylinder e, which is placed above the
boiler in the usual manner. f is the manhole, and g, g, are the flues in the
brickwork.
Having thus particularly described the nature of my Invention, and the
manner of performing the same, I wish it to be understood that I do not limit
myself to the details herein set forth, as the same may be varied or modified
without departing from the peculiar character of the Invention; and I declare
that I claim constructing steam boilers with an outer cylindrical shell or
casing, and an inner cylinder forming the flue, in the manner and for the
purposes described.
In witness whereof, I, the said Benjamin Goodfellow, have hereunto set
my hand and seal, this Sixteenth day of June, in the year of our
Lord One thousand eight hundred and fifty-seven.
0 Witness,
II. B. BARLOW,
Manchester.
B. GOODFELLOW. (L.S.)