Improvements in Steam Boilers.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
We, JAMES COMPTON MERRYWEATHER and CHRISTOPHER JOIN WALLACE JAKEMAN
of the Firm of Merryweather & Sons Limited, of Greenwich Road, Greenwich,
in the County of Kent, Engineers, do hereby declare the nature of this invention
to be as follows:-
This Invention relates to improvements in what are known as Flash Boilers,
in which steam is generated rapidly by the injection of small quantities of water.
One method of carrying out our Invention is as follows:
ve
A fire resisting chamber of fire brick, or other incombustible material, is pro-
vided, preferably of rectangular section, across which strong water tubes are
fitted. The ends of the tubes are allowed to project outside the chamber on two,
or more, sides and their ends are connected by special tee pieces so placed as to
connect two contiguous tubes in series and leave open ends in line with the
tubes. The open ends are stopped by means of glands through which rods of
suitable diameter pass. The rods pass through the entire length of each tube
and out at a similar gland on the opposite side of the Boiler. The rod
to reduce the contents of the tubes and also afford ready means for cleaning each
one out. A fire box with grate bars and fuel feeding hoppers is provided along-
side the fire-proof chamber, and is in communication therewith at its lower part
by means of openings left in the sides of the chamber. In ordinary working
the heat and gases from the fire pass through the openings referred to, and,
after heating the tubes, pass out at the top through a chimney provided for the
purpose..
In some cases the opening from the fire box is at the upper part of the chamber
and the heated gases pass downward to an opening provided at the bottom of
the chamber, instead of up the chimney as before described. When steam is not
required the heat from the fire is diverted from the chamber by means of suitable
dampers.
Dated this 9th dose of December 1896
We, JAMES COMPTON MERRYWEATHER and CHRISTOPHER JOHN WALLACE JAKEMAN
of the Firm of Merryweather & Sons Limited, of Greenwich Road, Greenwich,
in the County of Kent, Engineers, do hereby declare the nature of this invention
Price 81

page_text: and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This Invention relates to improvements in what are known as Flash Boilers,
in which steam is generated rapidly by the injection of small quantities of water.
One method of carrying out our Invention is as follows:-
A fire resisting chamber of fire brick, or other incombustible material, is pro-
vided, preferably of rectangular section, across which strong water tubes are
fitted. The ends of the tubes are allowed to project outside the chamber on two,
or more, sides and their ends are connected by special tee pieces so placed as to
connect two contiguous tubes in series and leave open ends in line with the
tubes. The open ends are stopped by means of glands through which rods of
suitable diameter pass. The rods pass through the entire length of each tube
and out at a similar gland on the opposite side of the Boiler. The rods serve
to reduce the contents of the tubes and also afford ready means for cleaning each
one out. A fire box with grate bars and fuel feeding hoppers is provided along-
side the fire-proof chamber, and is in communication therewith at its lower part
by means of openings left in the sides of the chamber. In ordinary working
the heat and gases from the fire pass through the openings referred to, and
after heating the tubes pass out at the top through a chimney provided for the
purpose.
In some cases the opening from the fire box is at the upper part of the chamber
and the heated gases pass downward to an opening provided at the bottom of
the chamber, instead of up the chimney as before described. When steam is not
required the heat from the fire is diverted from the chamber by means of suitable
dampers.
In the accompanying drawings:-
Figure 1, Sheet 1, shews a transverse section. of the Boiler through the fuel
feeding hopper, the tubes and fire box taken on the line 1-2 in Figure 2.
Figure 2, Sheet 1, is a sectional plan taken on the line 3-4 of Figure 1.
Figure 3, Sheet 2, shews one of the tee pieces, half in section and half in
elevation, connected to the boiler tubes.
In Figures 1, 2, and 3, A is the fire resisting chamber lined with fire brick
or other refractory material B. B; C. C. are the tubes; D is the fire box with grate
bars E; F is the fuel feeding hopper; G is the opening through which the heat
from the fire passes to the chamber A and tubes C. C; S is the inlet for water
and T the outlet for steam; H is the uptake through which the heated gases pass
when steam is being generated; K is the uptake through which the products
of combustion pass when steam is not required; the dampers L and J being
operated to effect the change of direction of products of combustion; M. M. are
the connecting pieces shewn in detail in Figure 3, Sheet 2, and connected to the
tubes C. C. by internally screwed sockets N. N, a metallic joint being made at N¹;
P. P. are the rods which serve to reduce the space for the formation of steam and
to afford means for cleaning the tubes; R. R. are the glands for making a tight
joint around rods P. P.
In some cases we do not make use of the glands R. R., but cut the rods to
such a length that they may be entirely enclosed by means of plugs instead of
the glands shewn.
The Boiler may be used without the feed hopper shewn by placing the fire
bars directly underneath the tubes.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. In connection with a boiler tube the use of the internal rod, substantially as,
and for the purpose described in connection with Figure 3, Sheet 2,

page_text: 2. The use of a feed hopper with separate fire chamber and controlling dampers
s described in connection with Figures 1 and 2, Sheet 1.
Dated this 8th day of September 1897.
JAMES COMPTON MERRYWEATHER.
C. J. W. JAKEMAN.