IMPROVEMENTS IN STEAM BOILERS AND FURNACES
Year: 1873

page_text: LETTERS PATENT to Joseph Shuttleworth, of Lincoln, in the County
of Lincoln, Engineer, for the Invention of "IMPROVEMENTS IN STEAM
BOILERS AND FURNACES.”
Scaled the 20th May 1873, and dated the 26th March 1873.
PROVISIONAL SPECIFICATION left by the said Joseph Shuttleworth
at the Office of the Commissioners of Patents, with his Petition,
on the 26th March 1873.
I, JOSEPH SHUTTLEWORTH, of Lincoln, in the County of Lincoln,
Engineer, do hereby declare the nature of my said Invention for " IM-
PROVEMENTS IN STEAM BOILERS AND FURNACES," to be as follows:-
This Invention relates to the construction of steam boilers with fire-
boxes, specially adapted for burning straw, reeds, grass, or other similar
fuel, and consists in forming the fire-door open to the bottom of the fire-
box as already adopted in certain constructions of portable engine boilers
and in introducing the straw or like fuel to be burnt at the lower part
of this fire-door, or underneath the fire-box through an aperture in the

page_text: fire-bars either through a detached tube or expanding hopper or through
a double-sided oven forming a part of the boiler. The bottom of the
fire-box is closed either by the ordinary fire-bars and ash pan, or by a
plate perforated or not as may be found preferable. An inclined grating
or perforated plate is also placed across the fire-box, so that the gases.
may be more effectually mingled before entering the boiler tubes.
E
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Shuttleworth in the Great Seal Patent
Office on the 26th September 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Joseph:
SHUTTLEWORTH, of Lincoln, in the County of Lincoln, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of March, in the year
of our Lord One thousand eight hundred and seventy-three, in the 1
36th year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Joseph Shuttleworth, Her special license
that I, the said Joseph Shuttleworth, my executors, administrators,
and assigns, or such others as I, the said Joseph Shuttleworth, my
executors, administrators, or assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
erm 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 AND FURNACES," upon the condition (amongst others) :
that I, the said Joseph Shuttleworth, my executors or administrators,
by an instrument in writing under my hand and scal, should par-
ticularly 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 Joseph Shuttleworth, 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

page_text: by the following statement, reference being had to the accompanying
Drawings and to the letters and figures marked thereon, that is to
say :-
My said Invention relates to the construction of steam boilers with
fire-boxes, specially adapted for burning straw, reeds, grass, or other
similar fuel, and consists in attaching to the ordinary fire-box an
clongated furnace or oven having a surrounding water space commu-
nicating with and forming part of the boiler itself. At the lower
part of this oven are placed the fire-bars and at the end nearest the
tube plate is a bridge of fire-brick or other suitable material. Between
the ends of the fire-bars and the bridge a space or opening is left for
admitting a current of air. The bottom of the fire-box proper is closed
by an ash pan in the usual manner. The outer end of the elongated
furnace or oven is closed by a balanced door sliding in grooves.
And in order that my said Invention may be fully understood I shall
now proceed more particularly to describe the same, and shall for that
purpose refer to the several Figures on the annexed Sheet of Drawings,
the same letters of reference indicating corresponding parts in all the
Figures.
Figure 1 of my Drawings represents a longitudinal vertical section of
'so much of a steam boiler as is necessary to illustrate my improve-
ments; Figure 2 is a corresponding horizontal section taken along the
line 1-2, in Figure 1; Figure 3 is a front end elevation of the oven and
boiler; and Figure 4 is a transverse vertical section of the oven and
portion of the boiler, the section on the right-hand half being taken
along the line 3-4 in Figure 2, and that on the left-hand half along the
line 5-6.
A represents a portion of an ordinary tubular boiler and B the usual
fire-box therein. To the front part of this fire-box there is attached the
clongated oven C, the sides and top of which are made double so as to
form a water space D round it which communicates with or forms part
of the water space of the boiler, as shewn clearly in Figures 1 and 2;
E are the fire-bars upon which the straw, reeds, grass, or other similar
fuel is to be burnt, such fire-bars being placed at the bottom or lower
part of the oven; F is a fire-brick bridge which is constructed across
the oven at the part where it opens into the fire-box B. An air inlet
aperture G is found in the bottom of the oven C between the back ends

page_text: of the fire-bars E and the bridge F; H is the usual ash pan for the
closing the bottom of the fire-box B.
The balanced door which is fitted to the front of the oven is not shown
in my Drawings, but it slides up and down in the lateral grooved
The fire-bars shown in dotted 5
guides I, I, shewn clearly in Figure 2.
lines at E' in the fire-box in Figure 1 are in the position they would
occupy when the boiler is used for coal burning in the ordinary
manner.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used or 1
carried into effect, I would observe in conclusion that what I consider to
be novel and original, and therefore claim as the Invention secured to me
by the herein before in part recited Letters Patent is,―
First. The peculiar construction and arrangement of steam boiler
furnaces for the burning of straw, recds, grass, and other like fuel, ]
therein as licrcin-before described and illustrated by the Drawings
annexed.
Second. The combination with the fire-box of a steam boiler of a
double-sided clongated oven or furnace forming part of the boiler itself,
substantially in the manner and for the purpose herein-before described
and illustrated by the Drawings annexed.
In witness whereof, I, the said Joseph Shuttleworth, have to this
my Specification, set my hand and seal, this Twenty-fifth day of
September One thousand eight hundred and seventy-three.
T
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