Improvements in and connected with Tubulous Steam Boilers.
Year: 1897

page_text: Date of Application, 5th July, 1897
Complete Specification Left, 1st Apr., 1898-Accepted, 18th June, 1898
PROVISIONAL SPECIFICATION.
Improvements in and connected with Tubulous Steam Boilers.
I, JAMES WEIR, of Holm Foundry, Cathcart, in the County of Kenfrew, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to the formation of the walls, combustion chambers, and
casings for water tube boilers, and is particularly well adapted for use in con-
junction with the class of boiler described in prior Application No. 28,961 of 1896.
According to one modification of the present invention the improved bricks
which I employ are made with a groove on one side to fit the tube, while the other
side is plain. Where the adjoining tubes are parallel and the space between them
comparatively narrow, I use two of these bricks to fill the space, the grooved sides
being placed next the tubes, and the flat side forming the joint. The bricks are
put in position by placing the grooved sides next the tubes, and then passing the
one brick behind the other with the fire clay or jointing material between.
According to another modification and when the space between the tubes is com-
paratively wide, I employ a plain filling brick between the grooved bricks, and
when this space is angular the sides of the grooved bricks may be made tapered
or a tapered filling brick put in between. The flat sides of the bricks may be
roughened or recessed to hold the jointing material. The bricks may either be
made of equal thickness to joint in the middle or unequal to break joint.
Where openings are made through a wall for the passage of the furnace gases,
it is generally preferred to support the wall at the opening by a second wall or
pillars built between the adjacent rows of tubes. When the space is very narrow,
I employ a single T shaped brick with bevelled or stepped ends. These bricks
are put in place by passing them in from each side of the space alternately, the
T heads keeping them from falling through and the bevelled ends from falling
out. The outer casing walls, I generally form with tubes so as to make a cage
round the boiler, the improved bricks being built in, completing the walls. Where
the heat is very great, such as at the furnace sides and combustion chambers, the
walls are thickened to project on the furnace or fire sides and the tubes of the cage
are left open for the passage of air to keep them cool, the heated air may be led
either to the fires or into the funnel. The outside of the casing walls may be
covered over with non-conducting material and protected with a light sheet casing.
Dated this 5th day of July 1897
Improvements in and connected with Tubulous Steam Boilers.
I, JAMES WEIR, of Holm Foundry, Cathcart, in the County of Renfrew, Engineer,
do hereby declare the nature of this invention and in what manner the same is to be
[Price 8d.1

page_text: performed, to be particularly described and ascertained in and by the following
statement: :-
. .
This invention relates to the formation of the walls, combustion chambers, and
casings for water tube boilers, and is particularly well adapted for use in con-
junction with the class of boiler described in prior Application No. 28,961 of 1896.
According to one modification of the present invention the improved bricks
which I employ are made with a groove on one side to fit the tube, while the other
side is plain. Where the adjoining tubes are parallel and the space between them
comparatively narrow, I use two of these bricks to fill the space, the grooved sides
being placed next the tubes, and the flat side forming the joint. The bricks are
put into position by placing the grooved sides next the tubes, and then passing the
one brick behind the other with the fire clay or jointing material between.
According to another modification and when the space between the tubes is com-
paratively wide, I employ a plain filling brick between the grooved bricks, and
when this space is angular the sides of the grooved bricks may be made tapered
or a tapered filling brick put in between. The flat sides of the bricks may be
roughened or recessed to hold the jointing material. The bricks may either be
made of equal thickness to joint in the middle or unequal to break joint.
Where openings are made through a wall for the passage of the furnace gases,
it is generally preferred to support the wall at the opening by a second wall or
pillars built between the adjacent rows of tubes. When the space is very narrow
I employ a single T shaped brick with bevelled or stepped ends. These bricks
are put in place by passing them in from each side of the space alternately, the
Theads keeping them from falling through and the bevelled ends from falling
out. The outer casing walls I generally form with tubes so as to make, a cage
round the boiler, the improved bricks being built in, completing the walls. Where
the heat is very great, such as at the furnace sides and combustion chambers, the
walls are thickened to project on the furnace or fire sides and the tubes of the cage
are left open for the passage of air to keep them cool, the heated air may be led
either to the fires or into the funnel. The outside of the casing walls may be
covered over with non-conducting material and protected with a light sheet casing.
To clearly explain the invention reference is made to the accompanying draw-
ings in which Fig. 1 shows an end elevation partly in section, Fig. 2 a portion of.
side elevation, and Fig. 3 section through side wall of tubulous steam boilers
described in my Specifications No. 28,961% and No. 917797.
In
Figs. 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 and 19 are detail views of
the bricks, and Fig. 20 shows the manner of putting the bricks into position.
all the figures the same reference letters are used to indicate corresponding parts.
Where the adjoining boiler tubes B are parallel, and the space between them
comparatively narrow, I use two bricks to fill the space, the grooved sides A of
such brick being placed next the tubes and the flat sides forming the joint. The
bricks are put into position by placing the grooved sides next the tubes and passing
the one brick behind the other as shown in Fig. 20. When the space between
the tubes is comparatively wide, flat sided bricks may be used to fill the space
between the grooved bricks. When the space between the tubes is angular the flat
side of the grooved bricks may be made tapered, and, should the space be wide
enough, tapered filling bricks may be used to fill in between the grooved bricks.
Fig. 1 shows a tubulous boiler of the type referred to fitted with my improved
walls and having an upper drum C, lower drúms D, evaporating tubes B, furnace E,
combustion or mixing chamber F. The inner wall G between the furnace E and
the mixing chamber F is formed by the tubes B and the bricks shown in detail in
Figs. 14, 15, 16, 17, 18 and 19. The outer wall H separating the mixing
chamber F from the greater part of the heating tubes B is made in the same
way as the inner wall G. The openings J made through the wall H are for the
passage of the hot gases. The wall H is supported at the opening J by a second
wall or pillar K built between the adjacent tubes. When the space is very narrow
I employ shaped bricks with bevelled or stepped ends as shown in Figures, 11,

page_text: 12 and 13. These bricks are put in place by passing them from each side alter-
nately. The T heads keep them from falling through and the bevel ends from
falling out and where there is room I use the bricks shown in Figs. 14 to 19, made
curved when required. All these bricks may be made of any non-combustible
material; it has been found that ordinary fire clay, and also cast iron, give satis-
factory results.
The outer casing walls L, Figs. 1 and 3, are formed by the tubes or bars M
filled in between with the bricks N as shown in detail in Figs. 4, 7 and 8 in
clevation, & Figs. 5, 6, 9 and 10 being corresponding plans. These bricks are
put in place as shown in Fig. 20. The thick bricks Figs. 4, 5 and 6 are used when
the heat is very great as at the furnace and mixing chamber, and the thin bricks
Figs. 7, 8, 9 and 10 are used where less heat is attained. The bricks shown in
Figs. 14 to 19 may be used to close and form the front casing wall O and may be
thickened on the outside as shown in plan and elevation in Fig. 2.
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:-
and
1. In tubulous steam boilers forming the combustion or mixing chamber walls
the outer walls or casings by the combination of the heating tubes with the
form of grooved brick shown in Figs. 14 to 19, of the accompanying drawings,
substantially as set forth.
or
2. In tubulous steam boilers the combination with the heating tubes of the
Tshaped bevel ended bricks formed as shown in Figs. 11, 12 and 13 of the
accompanying drawings, substantially as set forth.
3. In tubulous steam boilers forming the enclosing or outer casing walls of
tubes or solid bars in combination with the grooved bricks formed as shown in
Figures 1 to 3, and 4 to 10, of the accompanying drawings, substantially as set
forth.
4. The improved tubulous steam boiler constructed substantially as described
and as illustrated in the accompanying drawings.
Dated this 1st day of April 1898
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London, W.C., Chartered Patent Agent.
For the Applicant.