Improvements in Steam Boilers.
Year: 1893

page_text: Date of Application, 9th Mar., 1893-Accepted, 13th May, 1893
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
ROBERT SCOTT 168 Croydon Road Newcastle on Tyne Clerk 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 :-
The object of my invention is to effect improvements in my Patent dated
30 January 1886 No. 1352. These improvements relate to the construction of
tuyers and in fixing them to the furnace plates and shell of boiler and also in the
construction and fixing of main air channels which convey the air to the tuyers.
Firebars are dispensed with and the fuel is burned upon the furnace plates, this is
accomplished by the introduction of currents of air under pressure, these currents
pass through tuyers to the fuel. This system of generating steam is applicable to
all kinds of boilers.
In the accompanying drawings
Fig. 1 represents a cross section of a marine boiler, with two furnaces,
A represents pipe conveying air to outside tuyers, B represents stuffing box and
gland which are connected with the central pipe for conveying air to inside tuyers,
and constitute a steam joint. The glands allows movements of the tuyers to
overcome the expansion and contraction of the boiler plating. E represents a
thickening part which may be welded or rivetted to the furnace plates, so that when
the tuyers are screwed into position, it makes a better joint at this point.
G represents a double pipe which conveys the air to each side supplying the
furnaces separately. J represents the tuyers which conveys the air from the main
channel to furnaces. O represents stuffing box and gland which makes a steam
joint upon the shell of the boiler.
Fig. 2 represents a modification of the construction of the tuyers and also a
modification of fixing the tuyers to the furnace plates. C represents a bracket
which is rivetted or screwed to the furnace plate, the tuyers are screwed into the
bracket. D represents a section of the furnace plate. P represents a corrugation
upon the tuyers which allows for expansion and contraction. F represents flanges
and bolts for securing tuyers to main air channel. H represents main air channel
in this arrangement the main air pipes are separate.
Fig. 3 represents an enlarged section of inside tuyer as arranged in Fig. 1, with
the exception that in this case a bracket is employed, into which the tuyer is
screwed. C represents the bracket rivetted to furnace plate and tuyer screwed
into it. D represents furnace plate. B represents stuffing box and gland which
are connected with the central pipe G. G represents a double pipe for conveying
air to each set of tuyers. J represents tuyer.
Fig. 4 represents a longitudinal section of boiler, shewing arrangement of tuyers
in the furnace, and also the method of introducing the main air channel through
front of boiler. J represents the tuyers in the furnace. K represents double
valve connected to the main air channel, which can be opened or shut by levers,
thereby controlling the introduction of air to the furnaces. L represents a pipe for
conveying air to bridge, to further support combustion.
Fig. 5 represents a sectional plan shewing the arrangement of tuyers and main
pipes to convey the air to the furnaces, in all cases the tuyers are not placed
opposite to each other but alternately. D represents the furnace. G represents
the double pipe which conveys the air to each furnace independently. J represents
the tuyers. K represents the double valve connected to the main air channel,
which is controlled by the levers.
Fig. 6 represents a front view of the boiler, shewing arrangement of main air

page_text: pipes and double valve. A represents pipes conveying air to outside tuyers.
Krepresents double valve. M represents the levers which controll the working of
the valves, each valve controlls the air current to separate furnaces. N represents
the main air pipe from blower or fan, and it is connected with the valves K which
controlls the air to main channels, and the main channels to the tuyers.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare what I
claim is
1. Improvements in the construction of tuyers and fixing them to the furnace
plates as described and shewn in Figs. 1. 2. 3. 4 5 & 6 of the accompanying
drawings.
2. Improvements in fixing the tuyers to the main air channels as described and
shewn in Figs. 1. 2. 3. 4 5 & 6 of the accompanying drawings.
3. Improvements in the construction and fixing of bracket upon the furnace
plates as described and shewn in Figs. 2 & 3 of the accompanying drawings.
4. Improvements in the construction of main air channels and fixing them to the
tuyers and boiler plates and controlling the supply of air by means of valves as
described and shewn in Figs. 1. 2. 3. 4. 5 & 6 of the accompanying drawings.
Dated this 9th day of March 1893.
ROBERT SCOTT.