A NEW OR IMPROVED CAST IRON LINING FOR THE WALLS OF FURNACES
Year: 1882

page_text: LETTERS PATENT to William Henry Beck of 139 Cannon Street in the City
of London, Consulting Engineer and Patent Agent for an Invention of
"A NEW OR IMPROVED CAST IRON LINING FOR THE WALLS OF FURNACES
Communicated to me from abroad by Louis Wallet of Number 2 Boulevard
de Strasbourg Paris in the Republic of France machine maker and founder
PROVISIONAL SPECIFICATION left by the said William Henry Beck at the
Office of the Commissioners of Patents on the 10th August 1882.
WILLIAM HENRY BECK of 139 Cannon Street in the City of London, Consulting
Engineer and Patent Agent "A NEW OR IMPROVED CAST IRON LINING FOR THE
WALLS OF FURNACES" [Cominunicated to me from abroad by Louis Wallet of
Number 2 Boulevard de Strasbourg Paris in the Republic of France machine
maker and founder]
The object of the present invention is to suppress the fire bricks placed at the
level of the grate bars of the furnace, which being constantly in contact with the
layer of ignited coal, quickly deteriorate and necessitate frequent and costly repairs
which not only involve the consumption of a large number of fire bricks but
occasion stoppages in the working of the furnace.
The linings forming the subject of this invention are composed of bearers of cast
iron surrounding the grate at the sides and end and presenting a hollow section
with the exterior and lower faces perforated with openings which admit the cold
air from outside. This cold air enters at the underside and circulates through the
cast iron bearers constantly cooling the same, whereby the coal is prevented from
adhering thereto, thus giving the fireman every facility for cleaning. This air
which is distributed at the circumference of the grate after passing through the
cast iron linings facilitates combustion and consequently allows of the employment
of coal of inferior quality; it also prevents slackening of the combustion which is a
great advantage for steam boilers which are worked up to their full capabilities.
The openings in the lower faces of the linings are made double those in the sides
thereof to allow the scoriæ, ashes and slag which may have passed through the
openings in the sides to fall out.
The upper parts of the bearers are covered with fire brick blocks.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Henry Beck in the Great Seal Patent Office on the
10th February 1883.
"
WILLIAM HENRY BECK, of 139 Cannon Street, in the City of London, Consulting
Engineer and Patent Agent "A NEW OR IMPROVED CAST IRON LINING FOR THE
WALLS OF FURNACES [Communicated to me from abroad by Louis Wallet of
Number 2 Boulevard de Strasbourg Paris in the Republic of France machine
maker and founder]
The object of the present Invention is to suppress the fire-bricks placed at the
level of the grate bars of the furnace which being constantly in contact with the
layer of ignited coal, quickly deteriorate and require frequent and costly repairs
which not only involve the consumption of a large number of fire-bricks, but
occasion stoppages in the working of the furnace.
The linings forming the subject of this Invention are composed of bearers of cast
iron surrounding the grate at the sides and end and presenting a hollow section,
with the exterior and lower faces perforated with openings which admit the cold
air from outside. This cold air enters at the underside and circulates through the
cast iron bearers, constantly cooling the same, whereby the coal is prevented from
adhering thereto thus giving the fireman every facility for cleaning. This air
which is distributed at the circumference of the grate after passing through the
cast iron linings, facilitates combustion and consequently allows of the employment
of coal of inferior quality, and it also prevents the slackening of the combustion,
which is a great advantage for steam boilers which are worked up to their full
capabilities.
The openings in the lower faces of the linings, being about four times the area of
those in the sides thereof, are sufficient to allow the scoriæ, ashes, and slag, which
may have passed through the openings in the sides, to fall out.
Furnaces arranged according to this Invention possess the following advantages:—
1 A saving of fire-bricks.
2nd A saving of stoppages, and
3rd A saving by the possible use of cheaper coal.
These advantages are fully secured if care is further taken to cover the top of
the linings with fire-clay blocks as shewn in the Drawing hereto annexed.
Figure 1 is a cross section, Figure 2 is a longitudinal section, and Figure 3 a plan
of a steam boiler furnace arranged in accordance with the Invention.
The grate is of the ordinary kind, with bars a. a, resting at the front on the dead
plate b, and at the back on the cross-bearer c.
On three of its sides this grate is surrounded by cast iron linings or bearers, d, f
and d' which are hollow, and perforated or crenelated on the faces next the bars,
with openings g. g of any suitable number and dimensions. The lower faces are
also perforated or crenelated, but with openings about four times as large as the
openings g, in order to allow the scoria which may have passed through the latter
to flow away easily, and to fall into the ash-pit.
Over these cast iron linings d, f and d, are placed the fireclay blocks h the
object of which is to protect the upper part of the metal linings, to avoid repairs
in that part of the furnace, and to concentrate all the heat given out by the
combustion,
It will be readily understood that these cast iron linings are much more resisting
than the fire bricks generally employed, and that they allow of a circulation of cold
air all round the grate, and the distribution of that air to all points of the
combustion.

page_text: The Drawing shews the application of the Invention to the furnace of a steam
boiler, but it will be understood that it is equally applicable to all kinds of
industrial furnaces.
Having now described the nature of the said Invention and the manner in
which the same is to be carried into effect I would have it understood that what I
claim as the Invention to be secured by the within in part recited Letters Patent
is:-
In the construction of furnaces, the application and use of cast iron linings or
bearers applied to the sides and end of the grate, such linings or bearers being
hollow and crenelated or perforated with numerous openings on their faces next
the grate, and also on their lower faces as herein before described and illustrated in
the Drawings, and for the purposes specified.
In witness whereof, I the said William Henry Beck, have hereunto set my
hand and seal this ninth day of February in the year of our Lord, one
thousand, eight hundred and eighty three.
W. H. BECK (L.S.)
Patentee