Improvements applicable to the Brickwork of Water-tube Steam Boilers.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements applicable to the Brickwork of Water-tube Steam
Boilers.
I, JAMES WEIR, of Holm Foundry, Cathcart, in the County of Renfrew, North
Britain, Engineer, do hereby declare the nature of this invention to be as follows,
that is to say;-
The objects of my invention are to render the brickwork of water tube boilers
less liable to decay and displacement, and to facilitate the cleaning of the fires and
tubes in such boilers, particularly when these are fitted with the arrangement of
brickwork shown and described in my Patent Specification No. 15953 of 1897.
The clinker which forms on the bars is liable to adhere to the bricks of the
side walls of the furnace near the level of the fire grate, thus rendering the fires
difficult to clean, and the bricks liable to displacement and decay; also over and at
the openings through the brickwork between the tubes forming the walls of the
mixing or combustion chamber, the bricks are liable to displacement when cleaning
the tubes, or from other causes. My improvements consist in protecting the
building or lining at the furnace sides by fitting protecting or shield plates, which
are supported by framework or web brackets. The frames or brackets extend from
below the furnace bars up to some distance above the bars, and are bevilled back
at the top on the side next the fire to receive the protecting plates. These plates
are made of castiron or other suitable material, and fit and rest on the bevilled
portions of the frames or brackets and extend a short distance below the surface
The
of the fire grate. The brick walls may be supported on these brackets.
openings between the webs or framework may be provided with doors, and the air
entering by these openings keeps the shield plates cool, and prevents the adherence
of clinker to the sides.
To prevent the displacement of the bricks between the tubes which form the
walls of the combustion chamber, projections or rings are formed on the outsides
These
of the tubes on which the bricks or tiles rest at or over the openings.
rings or projections may be formed of hard solder, or fixed on by brazing, by press-
ing up the tube, or by welding.
Improvements applicable to the Brickwork of Water.tube Steam
Boilers.
I, JAMES WEIR, of Holm Foundry, Cathcart, in the County of Renfrew, North
Britain, Engineer, do hereby declare the nature of this invention and in what
Price 8d 1

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement, that is to say:--
The objects of my invention are to render the brickwork of water tube boilers
less liable to decay and displacement and to facilitate the cleaning of the fires and
tubes in such boilers, particularly when these are fitted with the arrangement of
brickwork shown and described in my Patent Specification No. 15953 of 1897.
The clinker which forms on the bars is liable to adhere to the bricks of the
side walls of the furnace near the level of the fire grate, thus rendering the fires
difficult to clean, and the bricks liable to displacement and decay; also over and at
the openings through the brickwork between the tubes forming the walls of the
mixing or combustion chamber, the bricks are liable to displacement when cleaning
the tubes, or from other causes. My improvements consist in protecting the
building or lining at the furnace sides by fitting protecting or shield plates, which
are supported by framework or web brackets. The brick walls may be supported
on these brackets. The openings between the webs or framework may be provided
with doors, and the air entering by these openings keeps the shield plates cool,
and prevents the adherence of clinker to the sides.
To prevent the displacement of the bricks between the tubes which form the
walls of the combustion chamber projections or rings are formed on the outsides
of the tubes on which the bricks or tiles rest at or over the openings.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append three sheets of explanatory draw-
ings to be hereinafter referred to and showing my improvements.
Figure, 1, on Sheet, 1, of the accompanying drawings is a longitudinal vertical
section, and Figure, 2, a transverse vertical section, showing one modification
of my protecting or shield plates with their supporting frame work or web
brackets. Figures, 3, and 4, are similar views of a second modification. Figures, 5,
and 6, Sheet, 2, are similar views of a third modification of the shield plates and
brackets. Figures, 7, and 8, Sheet 3, are respectively a side elevation and a
horizontal section, showing some of the tubes and bricks forming part of a com-
bustion chamber wall, as made with my improvements for supporting the filling
bricks over the openings through the walls. In those drawings the same refer-
ence letters are used to mark the same or like parts wherever they are repeated.
As shown in Figures, 1, 2, 3, 4, Sheet, 1, and in Figures, 5, and 6, Sheet, 2,
I protect the building or lining of the furnace sides near the level of the fire grate,
by protecting or shield plates, A, which are supported by framework or web
brackets, B. The frames or brackets, B, extend from below the furnace bars, D,
up to some distance above the bars, D, and are bevilled back at the top on the
side next the fire to receive the protecting plates, A. The plates are made of
castiron or other suitable material and fit and rest on the bevilled portions of the
frame or brackets, B, and extend a short distance below the level of the fire
grate, D. The bricks, C, may be supported on or by these brackets, B.
openings, E, between the web brackets or frame work may be provided with
hinged or other adjustable doors, F, and the air entering by the doors, F, as
shown by Figures, 1, 2, 3, 4, on Sheet, 1, or having access to the openings or
passages, E, as shown by Figures, 5, and 6, on Sheet, 2, is brought in contact
with the back of the shield plates, A, as shown by the arrows, to keep them cool,
and prevent adherence of clinker to the side. In Figures, 7, and 8, on Sheet, 3,
are shown my improvements to prevent the displacement or slipping down of the
bricks between the tubes which form the walls of combustion chambers, which
are described in my Patent Specification hereinbefore referred to. Projections or
rings, J, are formed on the outsides of the tubes, P', on which the bricks or
tiles, K, rest, at or over the openings, L. These rings or projections, J, may be
formed of hard solder, or fixed on by brazing, by pressing up the tube, or by
welding. An efficient manner of forming the rings, J, is to tín the tube, put it
into a mould, and cast on the brass or metal rings or projections.
The

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. Protecting the brick work forming the furnace sides at and near the level
of the fire-grate of water-tube steam boilers, by the combination and arrangement
of protecting or shield plates with supporting framework or web brackets; the
spaces between the brackets being arranged for the admission of air to the back
of the shield plates, substantially as and for the purposes herein before described.
2. The combination of the tube wall bricks (K), filling the spaces between the tubes
forming the mixing or combustion chamber in water-tube steam boilers, with pro-
jections or rings on the tubes at or over the openings, in the walls, leading into
or out of the combustion chamber substantially as and for the purpose hereinbefore
described
EDMUND HUNT,
Applicant's Agent.