IMPROVEMENTS IN STEAM BOILERS AND FURNACES THEREFOR
Year: 1884

page_text: We EDWARD HONYCHURCH of 52 Selwood Street, Rotherhithe in the County of
Surrey, Engineer, and ALFRED HUGH WILLIAM BROWN of 1 Waterloo Place, Pall
Mall in the County of Middlesex, Naval Architect, do hereby declare the nature
of the said Invention for IMPROVEMENTS IN STEAM BOILERS AND FURNACES
THEREFOR to be as follows:-
The invention relates to means whereby the gaseous products of combustion are
caused to give up the greater part of their heat before escaping from the flues of
the boilers.
For this purpose the products of combustion on passing from the furnace to the
combustion chamber are caused to pass over the bridge into and through a series
of channels or passages at the end of the furnace and immediately adjoining the
said bridge which passages are formed of a number of fire-clay slabs or blocks
arranged at such distances apart as to form these channels or passages of the
desired width. These fire clay slabs, or blocks may be made with plain corrugated
or other shaped surfaces. These channels or passages are open at the front and
back and also at the bottom in order to prevent any deposit accumulating
therein.
The products of combustion are thus caused to pass partly in a horizontal
direction through these channels or passages and partly downward through such
channels or passages into the combustion chamber whence the two streams are
caused to meet at the back of the combustion chamber after which when the boiler
is of a tubular kind, they pass into the tubes but according to our invention we
place in the mouths of such tubes lengths of fire clay tubes through which the
products of combustion pass and to which they again deliver a considerable portion
of their contained heat,
These fire clay tubes may be placed within boiler tubes of the form ordinarily
employed or the mouths of such tubes may be made with sockets extending the
required distance along the length thereof so that the fire clay tubes may fit
therein and thus form a compound tube of the same or approximately the same
internal diameter throughout.
Dat his me
"

page_text: CORDELE
DEVICATION.
We EDWARD HONYCHURCH of 52 Selwood Street, Rotherhithe in the County of
Surrey, Engineer, and ALFRED HUGH WILLIAM BROWN of 1 Waterloo Place Pall
Mall in the County of Middlesex, Naval Architect do hereby declare the nature
of the said invention for IMPROVEMENTS IN STEAM BOILERS AND FURNACES
THEREFOR and in what manner the same is to be performed; to be particularly.
described and ascertained in and by the following statement:—
The invention relates to means whereby the gaseous products of combustion are
caused to give up the greater part of their heat, before escaping from the flues of
the boilers.
For this purpose the products of combustion on passing from the furnace to the
combustion chamber are caused to pass over the bridge into and through a series
of channels or passages at the end of the furnace and immediately adjoining the
said bridge, which passages are formed of a number of fire-clay slabs or blocks
arranged at such distances apart as to form these channels or passages of the
desired width, These fire clay slabs or blocks may be made with plain corrugated
or other shaped surfaces. These channels or passages are open at the front and
back and also at the botton in order to prevent any deposit accumulating
therein.
The products of combustion aro thus caused to pass partly in a horizontal
direction through these channels or passages and partly downward through such
channels or passages into the combustion chamber whence the two streams aro
caused to meet at the back of the combustion chamber after which when the
boiler is of a tubular kind they pass into the tubes but according to our invention
we place in the mouths of such tubes lengths of fire clay tubes through which the
products of combustion pass and to which they again deliver a considerable portion
of their contained heat.
These fire clay tubes may be placed within boiler tubes of the form ordinarily
employed or the mouths of such tubes may be made with sockets extending the
required distance along the length thereof, so that the fire clay tubes may fit
therein and thus form a compound tube of the same or approximately the same
internal diameter, throughout.
And in order that our said invention may be more clearly understood and readily
carried into effect I will proceed aided by the accompanying drawings more fully
to describe the same,
DESCRIPTION OF THE DRAWINGS,
Figure 1 is a longitudinal section and Figure 2 is a transverse section of a cornish
boiler with our improvements applied thereto, and Figure 3 is a longitudinal
section and Figure 4 is a cross section of a marine boiler also with our invention
applied thereto. In all the figures like parts are marked with similar letters of
reference-a represents the shell of the boiler. b the furnace e the bridge d the

page_text: In the boiler shown at Figures 1 and 2 the products of combustion on passing
from the furnace b to the combustion chamber d are caused to pass over the
bridge c as usual and thence into and through a series of channels or passages f¹ fl
at the end of the furnace band immediately adjoining the bridge c which passages
are formed of a number of fire clay slabs or blocks ff arranged at such distances
apart by means of distance pieces f' as to form these channels or passages f¹ f¹ of
the desired width. These fire clay slabs or blocks ff may be made with plain,
corrugated or other shaped surfaces. These channels or passages f¹ f¹ are open at
the front and back and also at the bottom in order to prevent any deposit
accumulating therein.
The products of combustion are thus caused to pass partly in a horizontal
direction through these channels or passages f1 f¹ and partly downward through
the same into the combustion chamber d whence the two streams are caused to
meet at the back of the combustion chamber d after which when the boiler is of a
tubular kind they pass into the tubes.
In some cases the channels or passages f¹ƒ¹ in addition to being open at tho
front, back and bottom, may also be open at the top thereof.
According to our invention we also place in the mouths of such tubes e lengths
of fire clay tubes e¹ through which the products of combustion pass and to which
they again deliver a considerable portion of their contained heat.
These fire clay tubes e' may be placed within boiler tubes e of the form
ordinarily employed as shown at Figure 3 or the mouths of such tubes e may be
made as shown at Figure 5 with sockets extending the required distance along the
length thereof so that the fire clay tubes e¹ may fit therein and thus form a
compound tube of the same or approximately the same internal diameter
throughout.
•
In carrying this part of our invention into effect, we employ tubes & of larger
diameter throughout or of larger diameter at one end only, than those heretofore
employed.
The slabs or blocks f. f. are preferably supported on arches g formed of three
blocks of fire brick of the form shown at Figures 2 and 4.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
Constructing steam boilers and furnaces therefor with a series of channels or
passages fifformed in or by fire clay slabs or blocks f. f. and placed at the end
of the furnace immediately adjoining the bridge c and with fire clay tubes c¹ within
the boiler tubes e substantially as herein shown and described and for the purpose
stated.