IMPROVEMENTS IN STEAM BOILERS AND STEAM " BOILER FURNACES AND OTHER FURNACES
Year: 1882

page_text: LETTERS PATENT to Frederick Brown of Farley Hill Luton in the County
of Bedford for an invention of IMPROVEMENTS IN STEAM BOILERS AND STEAM
"
BOILER FURNACES AND OTHER FURNACES
"
PROVISIONAL SPECIFICATION left by the said Frederick Brown at the Office
of the Commissioners of Patents on the 5th June 1882.
FREDERICK BROWN of Farley Hill Luton in the County of Bedford
"IMPROVEMENTS IN STEAM BOILERS AND STEAM BOILER FURNACES AND OTHER
FURNACES
"
This Invention has for its object improvements in steam boilers and steam boiler
furnaces, and other furnaces
In Cornish boilers and other boilers with internal flues I form the internal flue
with a hollow projection extending across the upper part of its interior just in
front of the ordinary bridge at the rear end of the fire bars. The projection is of
a curved form and goes right across the top portion of the flue-the bottom line
of the projection being straight and horizontal. The flame and smoke impinging
against the front side of this projection is deflected downwards on to the fuel
resting upon the top of the fire bars and then rises up between the back of the
projection and the bridge.
The hanging projection above described not only gives increased heating surface
to the boiler but in addition causes all smoke to be perfectly consumed.
.
Instead of forming the boiler flue with a hollow projection standing across its
upper part an inclined lamp may be placed across the upper part of the interior
of the flue to deflect the smoke and flame downwards in the same manner as above
described.
Steam boilers heated by an external fire may similarly be formed with a hollow
projection descending from them to come just in front of the bridge or the furnace
might be formed with an arch or lump across its upper part just in frout of the
bridge to effect the same object. This is also applicable to the furnaces of Bakers
ovens.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frederick Brown in the Great Seal Patent Office on the
5th December 1882.
FREDERICK BROWN of Farley Hill Luton in the County of Bedford
"IMPROVEMENTS IN STEAM BOILERS AND STEAM BOILER FURNACES AND OTHER
FURNACES
"
This invention has for its object improvements in steam boilers and steam boiler
furnaces and other furnaces.
The application of the invention to a Cornish boiler is illustrated by Figure 1
which is a longitudinal and vertical section of a portion of such a boiler.
In Cornish boilers and other boilers with internal flues I form the internal
flue a with a hollow projection a' extending across the upper part of its interior
in front of the ordinary bridge b near the rear end of the fire bars c.
The pro-
jection is of a curved form and goes right across the top portion of the flue, the
bottom line of the projection being straight and horizontal. The flame and smoke
impinging against the front side of this projection is deflected downwards on to
the fuel resting upon the top of the fire bars and then rises up between the back
of the projection and the bridge. The hanging projection above described not
only gives increased heating surface to the boiler but in addition causes all smoke
to be perfectly consumed.
The ignition of the smoke increases the draught.
The furnace bars shown in the drawing are referred to in my provisional
specification No. 4734 in the present year they have deep gills to heat the air
before it enters the fire, and are made to rise at an angle immediately in front of
the ordinary bridge, the fire is thus supplied with hot air, instead of cold, ensuring
more perfect combustion, intensifying the heat of the fire and further increasing
the draught.
Instead of forming the boiler flue with a hollow projection extending across its
upper part an inclined lump may be placed across the upper part of the interior of
the flue as is represented at d in figure 2 to deflect the smoke and flame downwards
in the same manner as above described.
Steam boilers heated by an external fire may similarly be formed with a hollow
projection descending from them to come in front of the bridge or the furnace
might be formed with an arch or lump across its upper part in front of the bridge
to effect the same object. This is also applicable to the furnaces of Bakers ovens
as is represented by Figure 3 which is a longitudinal vertical section through the
furnace. d is the inclined lump it deflects the smoke and flame sharply downwards
on to the fire and then at once permits the flame and heat to ascend within the
chamber of the oven. e is a boiler which may be set over the furnace.
What I claim is :-
First. The construction of boilers having internal flues a containing the furnace
with hollow projections a¹ extending across the upper part of such flues in front
of the ordinary bridge b substantially as described in respect to Figure 1.
.
Second. The construction of steam boiler and other furnaces substantially as
described.
Third. The construction of the furnaces of Bakers ovens substantially as
described.
In witness whereof I the said Frederick Brown have hereunto set my hand
and seal this Fifth day of December in the year of our Lord One thousand
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