Year: 1887

page_text: Date of Application, 7th Dec., 1887
NI
Complete Specification Left, 20th Aug., 1888
Complete Specification Accepted, 21st Sept., 1888
the nature of this invention to be as follows:-
The object of my invention is to further improve my patents No. 1352, 1886 and
No. 8226, 1887. Suitable inlets for air are arranged in the boiler and furnace plates,
these inlets are connected with tuyeres and the air passes direct into the bottom and
sides of the fuel. The fuel is placed upon the furnace hottom. The air is introduced
to the furnace under pressure with a fan or blower, a large tube is placed in the
furnace and is connected with the boiler, when this large tube is not used, a number
of tubes are placed crosswise in the furnace, these tubes are so connected with the
furnace plates that the flange or connection is surrounded by water at both sides.
For keeping these tubes clean a hand hole or other suitable arrangement is placed in
the boiler shell, or I may use a mechanical arrangement which consists of a scraper
which may be moved back and forwards in the tubes, the rod connected with the
scraper passes through a steam tight stuffing box, and may be worked from the outside
of the boiler.
I may place a razor shaped bar at the bottom or sides of the furnace to carry of the
At the rear end
steam and prevent it from forming steam jackets around the furnace.
of the boiler a tank is placed, the gases from the furnace come into contact with the
side of this tank, and the gases are diverted back through the boiler by means of tubes
which come out at the front of the boiler, the gases are then carried along the top or
side of the boiler and are delivered into a body of water before passing into the
atmosphere. The tube containing the gases which passes along the top or side of the
boiler may be used to either heat the feed water or the air before it passes into the
furnace. To protect the ends of the tubes in Marine boiler from the heat I place at
the ends a suitable arranged ferrule made of a non heat conducting material. Tho
above arrangements may be applied to Cornish, Lancashire, Marine and other boilers.
The aforementioned tubes in the furnace promote a great circulation of water.
Dated this fith of December 1887.

page_text: improvements III ади сонцестcu WICH Ditam
ROBERT SCOTT 237 Stanton Street Newcastle on Tyne Grocer 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 bring the centres of energy of the heat into as
near a contact with the furnace plates as possible Where fire bars are used, frequently
there is upwards of eight thousand degrees of heat in the solid body of the burning
fuel. While in proximity to the furnace plates there is less than three thousand
degrees of heat. The nearer therefore the centres of energy of the heat are to the
furnace plates the greater will be the efficiency of the boiler. To secure the full
benefits of this law I have entirely dispensed with fire bars, the fuel is placed upon
the bottom of the furnace. Combustion is supported by the introduction of concen-
trated currents of air under pressure.
The concentrated currents are produced by a fan or blower as is well understood.
The concentrated currents of air pass through the sides of the boiler by means of
pipes and suitably constructed tuyeres direct to the top, sides or bottom of the fuel.
While greater economy is secured by burning the fuel upon the bottom of the furnace
plates, yet, the centres of energy of the heat are then too far removed from the furnace
plates, to overcome this defect and further increase the efficiency of the Boiler, a large
tube is placed inside of the flue. In Marine Boilers this large tube extends from
the front of the furnace to the rear of the combustion chamber, it is connected to
the top of the flue at the front and it is conneted to the bottom of the flue at the
back of the combustion chamber. In Lancashire and Cornish Boilers this large tube
extends nearly the whole length of the flue, it has connections with the top of the fluo
and it also has connections with the bottom of the flue. The size of this tube varies
according to the size of the flue, in a flue 36 inches in diameter this internal tube
would be from 22 to 24 inches in diamter. This tube greatly adds to the efficiency
of the system. The flame and heated gases are forced between this large tube
and the flue, and the practical effect is much increased by reason of the heat being
concentrated and made to impinge upon the plates, this internal tube also promotes
a large and constant circulation of water in the Boiler, this retards the formation of
incrustation, and causes the water to be of an equal temperature, and it also produces
an equal expansion upon the furnace plates. Instead of using this internal tube, a
number of tubes may be placed at right angles or crosswise to the flue, immediately
above the fuel, where fire bars are used this could not be done, but as the fire bars are
dispensed with in these, Boilers there is ample space to place them above the fuel, and
the effectivness of the heat is much increased by being brought into nearer contact
with the burning fuel. In the single flued boiler shewn in the accompanying drawings
fig. 1 & 2 the hot gases pass twice through the Boiler after they leave the Hue, when
the gases pass through the Hue, they are diverted back (by a plate placed at the rear
of the Boiler) through a return tube, to the front of the Boilor, the gases are again

page_text: at the front by a U bend. After the gases leave the boiler the remaing energy they
possess is utalized in heating the feed water, this is accomplished by placing a tank
containg water upon the end and top of the Boiler, the hot gases pass through pipes in
the tank, with forced draught the gases may be driven about where ever desired.
In using forced draught it is necessary to retard the too rapid exit of the gases this
I
may be accomplished by diminishing the size of the outlets of the gases, prefer
however to place the outlets from the furnace into a body of water or other fluid, by
submerging the outlets a few inches into the water the too rapid exit of the gases is
retarded and the gases are purified and pass into the atmosphere in a perfectly
invisable form.
I may state that I have already obtained two patents for improvements in and con-
nected with steam Boilers namely No. 1352 and No. 822687 the present applica-
tion for a patent is for further improvements of the above mentioned patents. In this
description I have used the term furnace and flue as meaning the same thing. Marines
Lancashire and Cornish Boilers with fire bars can be converted to this system, as the
system is applicable to all boilers that have internal flues.
The following is an explanation of the annexed drawings.
Figures 1 and 2 are a front and longitudinal view of a single flued Boiler.
A A Boiler.
BBB Large Tube placed inside of the flue, this tube may be either placed close to
the top of the flue or one or two inches from the top, it extends nearly the whole
length of the flue.
CC are connections of this tube to the top of the flue.
D D D are inlets and connections of this tube to the bottom of the flue.
EEEE are return tubes, there is a plate at the back of the boiler and the gases
are diverted back through the Boiler by means of these tubes.
FFFF are another set of return tubes when the gases come to the front of the
Boiler by means of tubes E they are again diverted back through the Boiler, the
return tubes are connected at the front by a U bend.
G G G are inlets that pass through the sides of the Boiler direct to the fuel, these
inlets convey the currents of air to the fuel to support combustion, they are connected
with a fan or blower and air by this means is forced into the flue.
H Bottom of flue upon which the fuel is placed.
L Tank containing the feed water, the gases after leaving the Boiler pass through
this tank and heat the feed water.
Arrows shews the motion of the gases and also of the water through the large tube
placed inside of the flue.
Fig. 3 represents a front view of a single flued Boiler.
A A Boiler.
KK tubes placed at right angles to the flue immediately above the fuel.
G G inlets for concentrated currents of air direct to the fuel.
H Bottom of flue upon which the fuel is placed.
Figure 4 represents a longitudinal view of a Marine Boiler.
A Boiler.
B. Large tube placed inside of the flue, this tube extends from the front of the
flue to the rear of the combustion chamber.
C Connection of tube to the top of the flue.
D Inlet and connection of large tube to the Bottom of the flue.
G Inlets for concentrated currents of air direct to the fuel see tuyere fig. 6.
Figure 5 represents a trough in which the gases are forced through before being
liberated to the air, hy this means the too rapid motions of the gases are retarded,
and when they pass through the water in the trough they are purified and pass into
the atmosphere in a perfectly invisable form. F is outlet from Boiler.
M trough.
Figure 6 represents a tuyere and inlets through Boiler plates, and also connections
to Boiler plates, the air is forced through this tuyere; the number of tuyeres in a flue
is according to the size of the flue, and they are placed alternatively to each other.

page_text: Having now particularly described and ascertained the nature of my invention,
and in what manner the same is to be performed, I declare that what 1 claim is.
1st. Burning the fuel upon the bottom of the flue.
2nd. The introduction of concentrated currents of air direct to the fuel, substantially
as described and shewn in figures 1. 2. 3 4 and 6 of the accompanying drawings.
3rd. Placing a large tube inside of the flue, as described and shewn in figures 1
2 and 4 of the accompanying drawings.
4th. Placing tubes at right angles to the flue, immediately above the fuel as
described and shewn in figure 3 of the accompanying drawings.
5th. Passing the gases from the Boiler through a body of water or other fluid as
described and shown in figure 5 of the accompanying drawings.
6th. Passing the gases twice through the Boiler after leaving the flue as described
-and-shewn in figures 1 and 2 of the accompanying drawings.
7th. Improved tuyere as described and shewn in figure 6 of the accompanying
drawings.