IMPROVEMENTS IN STEAM BOILEES
Year: 1854

page_text: LETTERS PATENT to William Chippindale, of Leeming Bar, near Bedale,
and Leonard Robert Sedgwick, of Crakehall, near Bedale, in the County
of York, for the Invention of “IMPROVEMENTS IN STEAM BOILEES
Leonard Robert Sedgwick at the Office of the Commissioners of Patents,
with their Petition, on the 12th December 1854.
We, WILLIAM CHIPPINDALE, of Leeming Bar, near Bedale, and LEONARD
ROBERT SEDGWICK, of Crakehall, near Bedale, in the County of York, do
hereby declare the nature of the Invention for "IMPROVEMENTS IN STEAM
BOILERS" to be as follows:-
This Invention consists of a peculiar combination of parts of a steam boiler,
whereby very extensive heating surfaces are obtained. For this purpose it is
preferred that the exterior should be of a cylindrical form, (but this is not
essential,) and consist of a double cylinder with a water space between them,
which is closed at the bottom. At the lower end and in the interior of the
cylinders the furnace is constructed, there being an opening thro' the double
cylinder for the fire door above the fire bars. The outer cylinder is closed in by
a hemispherical or other convenient form of steam chest. The upper end of the
inner cylinder is closed by a plate, into which numerous tubes are fixed, they
being open at their upper ends into the water and steam space above, and
they descend down to a position above the fire bars, and they are closed at
their lower ends. A flue or flues for the passage away of the products of com-
bustion is or are formed near the upper part of the inner cylinder, and below
the plate to which the descending tubes are fixed

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Chippendale and Leonard Robert Sedgwick in the
Great Seal Patent Office on the 8th June 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
CHIPPENDALE, of Leeming Bar, near Bedale, and LEONARD ROBERT SEDGWICK,
of Crakehall, near Bedale, in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of December, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of .Her
reigu, did, for Herself, Her heirs and successors, give and grant unto us, the
said William Chippendale and Leonard Robert Sedgwick, Her special licence
that we, the said William Chippendale and Leonard Robert Sedgwick, our
executors, administrators, and assigns, or such others as we, the said William
Chippendale and Leonard Robert Sedgwick, our 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 IN STEAM BOILERS," upon the condition (amongst others) that
we, the said William Chippendale and Leonard Robert Sedgwick, by an
instrument in writing under our hands and seals, or under the hand and seal
of one of us, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause the
saine 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 we, the said William Chippendale and Leonard
Robert Sedgwick, 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 consists of a peculiar combination of parts of a steam boiler.
whereby very extensive heating surfaces are obtained. For this purpose it is
preferred that the exterior should be of a cylindrical form, but this is not
essential, and consist of a double cylinder with a water space between them,
which is closed at the bottom. At the lower end and in the interior of the
cylinders the furnace is constructed, there being an opening through the double
.cylinder for the fire door above the fire bars. The outer cylinder is closed in by
a hemispherical or other convenient form of steam chest. The upper end of the
inner cylinder is closed by a plate, into which numerous tubes,are fixed, they

page_text: being open at their upper ends into the water and steam space above, and
they descend down to a position above the fire bars, and they are closed at
their lower ends. A flue or flues for the passage away of the products of com-
bustion is or are formed near the upper part of the inner cylinder, and below
the plate to which the descending tubes are fixed.
Having thus stated the nature of our said Invention, we will proceed to
describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 is a vertical section of a steam boiler constructed according to our
Invention; Figure 2 is a transverse section thereof. It is preferred that
the form should be cylindrical, as shown, but this is not essential.
a is the
outer cylinder; 6 is an inner cylinder, having a water space c between them;
d is the steam chest, at the upper part of the outer cylinder a. At the
upper end of the cylinder is a plate e, in which are fixed several tubes f
which are open at their top ends and closed at their lower ends, as shown.
9,9, are cocks to the tubes f, to draw off the water and sediment therefrom,
when necessary; h is the fire-place; i, the fire bars; j, the fire door; k, one
or more flues, indicated by dotted lines; is the safety valve. The steam pipe
is not shown, but it may be applied to any convenient part of the steam chest.
Having thus described the nature of our said Invention, and the manner of
performing the same, we would have it understood that what we claim is the
combination of parts herein described.
In witness whereof, we, the said William Chippendale and. Leonard
Robert Sedgwick, have hereunto set our hand and seal, this Fourth
day of June, in the year of our Lord One thousand eight hundred and
fifty-five.
WILLIAM
CHIPPINDALE.
(L.S.)
Witness,
WILLIAM. SANDERS,
LEONARD ROBERT SEDGWICK. (L.S.)
.Cayton, nr. Ripley.
LUKE LONSDALE SEDGWICK,.
Crakehall, Bedale, June 4.