IMPROVEMENTS IN STEAM BOILERS, THEIR FIRE PLACES, AND COMBUSTION CHAMBERS."
Year: 1881

page_text: LETTERS PATENT to Charles Wilden King, of Manchester, in the County of
Lancaster, Engineer, for an Invention of "IMPROVEMENTS IN STEAM BOILERS,
THEIR FIRE PLACES, AND COMBUSTION CHAMBERS."
PROVISIONAL SPECIFICATION left by the said Charles Wilden King at the
Office of the Commissioners of Patents on the 28th September 1881.
CHARLES WILDEN KING, of Manchester, in the County of Lancaster, Engineer.
"IMPROVEMENTS IN STEAM BOILERS, THEIR FIRE PLACES AND COMBUSTION
CHAMBERS."
My Invention relates to certain constructions of boilers and additions to boilers,
more particularly in and to that class of boilers which have brick or fire clay fire
places and combustion chambers, and my Invention is particularly applicable to
boilers for marine purposes.
The use of brick and fire clay wholly or partly in the construction of fire places
and combustion chambers of marine boilers has laterally found great favour,
particularly on the score of economy of fuel, intenser heat, and improved circulation,
but the use of brick or fire clay fire places or combustion chambers has exposed a
serious defect and objection to their general application. The effect is the intensity
of the heat contained in brick or fire clay fire places and combustion chambers has
a tendency to burn away and shorten the life of those parts of the boiler directly
exposed to the heat and flame, more especially the back tube plate of the boiler,
or that tube plate first exposed to the flame.
My Invention consists in absorbing the intense beat by the use of water tubes
placed within the combustion chamber or fire place of steam boilers, more particu-
larly of steam boilers constructed with fire places and combustion chambers as
patented to me on 23 March 1881, No. 1282. The tubes used for the purposes of
my Invention are preferably but not necessarily of the conical type, the upper
portion being connected to the upper water or steam space of the boiler proper,
and the under portion being connected to the lowest part of the boiler proper..
The tubes are preferably upright, and so placed that the impact of the flame is as-
IDC21

page_text: much as possible shared by them and the boiler proper. In single boilers of the
dry furnace type one or more upright tubes may be used placed in the combustion
chamber of the boiler. In boilers of the inside furnace type upright tubes may
likewise be used placed in the combustion chamber.
According to my Invention, where boilers have overhanging ends, which form
the top or a part of the combustion chamber, I hang the tubes from the underside
of the overhanging end of the boiler, and I utilize the tube for the purpose of
staying the top of the combustion chamber and fire box by means of rod stays
which are attached to the shell of the boiler at the top and the lower end of the
tube at the bottom, thus staying that part of the boiler which forms the roof of the
combustion chamber direct from the upper shell of the boiler. To ensure the
circulation of the water in the tubes, and instead of connecting them to the bottom
of the boiler, they may be formed on the well known "Field" principle, namely,
having an internal open ended tube. In the case of double boilers of ordinary
construction placed end to end I may suspend the tubes in the combustion
chamber or fire box from an independent dome, which forms the top or cover of the
combustion chamber. The tube and dome are connected respectively to the
bottom and top of the boiler, or an internal tube may be used. In the case of a
double ended boiler with a central combustion chamber I suspend the tubes into
the combustion chamber from that part of the boiler which forms the combustion
chamber top, and I stay such combustion chamber top from_the_upper_shell-barrel-
hy the tubes-
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Wilden King in the Great Seal Patent Office on the
28th March 1882.
CHARLES WILDEN KING, of Manchester, in the County of Lancaster, Engineer.
"IMPROVEMENTS IN STEAM BOILERS, THEIR FIRE PLACES, AND COMBUSTION
CHAMBERS."
My Invention relates to certain constructions of boilers and additions to boilers,
more particularly in and to that class of boilers which have brick or fire clay fire;
places and combustion chambers, and my Invention is particularly applicable to
boilers for marine purposes.
The use of brick and fire clay wholly or partly in the construction of fire places
and combustion chambers of marine boilers has latterly found found great favour,
particularly on the score of economy of fuel, intense heat, and improved circulation,
but the use of brick or fire clay fire places or combustion chambers has exposed a
serious defect and objection to their general application. The effect is the intensity
of the heat contained in brick or fire clay fire places, and combustion chambers has
a tendency to burn away and shorten the life of those parts of the boiler directly

page_text: shown at Figures 1 and 2, it will be seen that I suspend one or more water tubes A
from the overhanging end D of the boiler B, which overhanging end D forms
entirely or wholly the top or cover of the furnace or combustion chamber C, and
I stay the water tube or tubes A by means of the stays E from the upper portion
of the shell or barrel of the boiler B, thereby supporting the underside of the
overhanging end D. By placing the water tube or tubes A in the combustion
chamber or fire place C, such tubes to a great extent absorb the intense heat in the
combustion chamber and prevent such heat burning the back tube plato F. In
the example shown at Figures 3 and 4 it will be seen that the tube A is suspended
in the fire place or combustion chamber C from the chamber H, and is stayed from
the top of such chamber by the stay E; the chamber H is so placed in the com-
bustion chamber C so that it forms a portion of the top of such combustion
chamber, and the overhanging end D of the boiler B is so constructed as to partly
surround the chamber H and forms the other portion of the combustion chamber
top.
In the application of my Invention to wet bottomed boilers I construct the
water tubes in manner such as shown at Figure 5, namely, I connect the tubes A
to the chambers H, H', and I apply the tubes and chambers to the boiler in
manner shown at Figures 6 and 7, namely, I place the water tubes A in the
combustion chamber C, so that the upper chamber ■ forms_the_top-of-the com--
bustion chamber_and_the-lower-chamber His below the combustion chamber.
-The chambers H, H³, are connected_to_the-boiler-B-by-the-pipes a, b.
-In-the-example shown at Figures 8 and 9 it will be seen that I place the water
tube or chamber A in the fire place C, suspended from the bottom of the boiler B.
By this means I protect the underside or that end of the boiler B which comes
into most close contact with the intense heat.
The examples shown in the Drawings serve only to illustrate some of the methods
of applying my Invention, which I would have it clearly understood is not limited
to the precise form and disposition of the water tubes and chambers shown. The
tubes A may be furnished if required with inside water circulating pipes, or the
bottoms of the tubes may be connected to the boiler proper, or other means may
be employed to ensure circulation. Also the tubes may or may not extend below
the fire grate J, the depth of the tubes in all cases being regulated by circumstances
and the inain construction of the boiler.
What I claim as my Invention and secured to me by Letters Patent as
aforesaid is,
In boilers having brick or fire clay fire places and combustion chambers, the use
and application of water tubes or chambers, for the purposes herein set forth and
described and as shown in the Drawings hereto annexed.
In witness whereof, I, the said Charles Wilden King, have hereunto set
my hand and seal, this Twenty fifth day of March, in the year of our Lord
One thousand eight hundred and eighty two.
OTTA DIES WILDEAL
FINA