Improvements in the Brickwork Foundations or Settings and Coverings of Boilers and Furnaces.
Year: 1898

page_text: Date of Application, 10th May, 1898-Accepted, 10th Sept.,"
1898
COMPLETE DI MUIFICATION.
Improvements in the Brickwork Foundations or Settings and
Coverings of Boilers and Furnaces.
I, CHARLES WILLIAM THOMAS, of Fireclay and Brick Works, Stourbridge, in
the County of Worcester, Manufacturer, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
This invention has reference to the brickwork foundations or settings and to
the coverings of boilers and furnaces, and relates particularly to those foundations
or settings within which flues or passages are constructed to surround the boiler's
walls, for the passage of the heated products from the fire.
The said invention consists in constructing the brickwork contact portions of.
the boiler setting or foundation, such, for example, as the longitudinal seating
walls, the covering-in crown walls of the side Hues, the bridge wall, and the
back flue cover, of an acute or sharp angular figure, for the purpose of giving
only a line of contact; the objects obtained thereby being, first, that all the
products from the fire can be utilized for. heating purposes, second, that practi-
cally all the boiler surface is exposed to the direct action of the heated gases
within the flues, third, that there is only a small surface of the brickwork, in
direct contact with the boiler shell, and fourth, that the said boiler shell and
plates can be more easily inspected than hitherto, and this latter without a
material displacement of the foundation or setting.
In the accompanying sheet of drawings the invention is shown applied to a
steam boiler of the Lancashire type, and its foundation or setting; also to the
covering which encircles the boiler's crown. The enumerated points of contact
of the said brickwork with the boiler are preferably built up by rows of blocks,
and therefore in the said sheet of drawings these blocks are clearly illustrated
both as forming a line in the brickwork foundation and singly. Further, the
boiler cover is preferably built up of loose tiles, and so one of these loose tiles
is also shown separate. In the said sheet of drawings Fig. 1 is a perspective
view of a boiler mounted on its setting and having contact parts according to
this invention, and a portion of the brick work is shown removed for the purpose
of illustration. Fig. 2 is a transverse vertical section through the boiler and its
foundation Fig. 1, but there is shown in addition in this view the crown covering
or arch over the boiler which is built up of tiles with contact points constructed
according to this invention. Figs. 3, 4, 5 and 6 represent separate views of
single blocks and tiles or slabs constructed according to this invention, the same
being applied to the varying contact points of the foundation and covering, and
being adapted to be placed side by side in numbers to form a long or short length
wall or seating. In Fig. 7 a slight modification of the tile or slab Fig. 6° is
shown, and in Fig. 8 a diagramatic sectional illustration of the application of this
invention to the front wall of the boiler setting or foundation is given.
With reference to the said figs., a is the boiler, a² its brickwork foundation
or setting, a³ the longitudinal side flues formed in the said setting, a' the longi-

page_text: tudinal seating walls for the boiler, as the covering crown walls of the side flues,
and a the tile covering or brickwork arch; the latter capping the summit of the
boiler. The front wall c, which is shown in Figs. 1 and 8 only, is constructed
of a number of blocks similar to the one a³, Fig. 3, or the one 2, Fig. 5, whilst
the back flue covering-in wall is built up from blocks similar in construction
to those which cover in the side flues and which are marked a³. The bridge
wall of the boiler foundation would, preferably, be built up of the form of block
shown in Fig. 5.
It will be seen clearly from the construction of the said blocks that the contact
tips or angular edges d are formed acute or almost sharp, and that the sides or
faces d², d³, of the angle leave the said tip or point, d, sharp or decided, in order
to clear themselves quickly from close proximity with the boiler plates, and to
enable as little surface as possible of the boiler to touch the said points or tips.
It will be obvious from Fig. 2 how lines of clearances 9 are formed wherever
contact of the brickwork foundation is made with the boiler, and also 'how an
edge contact only of the brickwork with the boiler is obtained; it being under-
stood that the contact edges of the boiler seatings and flue covers and also the
covering a6 are not rounded but fetched up sharp.
In Fig. 7 are shown a number of studs, g³, of a conical formation, as contact
points for the tiles a instead of the ribs as illustrated in Fig. 6.
The blocks, as aforesaid, which form the seatings and the covers to the flues,
and also the contact points of the brickwork with the boiler are, preferably,
made of fireclay, but they may be made of any other material; and by their
particular construction it is believed that the successful working and life of a
boiler will be aided and increased, as there is a larger surface of the boiler in
contact with the heated gases, and a smaller surface in contact with the brick-
work; the last named being very important in order to prevent oxidation and
corrosion of the boiler plates through the moisture in the brickwork.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is:-
First. Making the contact portions of the brickwork foundation or setting of
a boiler, or furnace, of an acute angular edged or tipped construction, and forming
the faces of the brickwork adjacent to the said contact portions, and diverging
therefrom, of a sharp and acute order or bevel, and so that a line of brickwork
contact to the boiler is only presented, substantially as set forth.
Second. Covering-in or arching over the crown or summit of a boiler or furnace
when fixed in its foundation or setting by tiles or slabs having acute angular
edges or tipped bearing portions, substantially as set forth.
Third. The combination of a boiler or furnace, a brickwork foundation or
setting whose contact portions are built up of a number of blocks having acute
angular edges or tips, and covering in tiles or slabs for arching over the crown
of the boiler, and which have also acute angular edges or tips for contact points,
substantially as set forth.
000
Dated this on uay of Apr
W. P. THOMPSON & Co.,
11, Burlington Chambers, New Street, Birmingham,
Also of Liverpool, London, and Manchester,
Patent Agents for the Applicant.