Improvements in Steam Generators.
Year: 1893

page_text: Date of Application, 28th Nov., 1893
Complete Specification Left, 28th Aug., 1894-Accepted, 20th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
RICHARD MILLS Bank Clerk London & County Banking Co. Deptford do
hereby declare the nature of this invention to be as follows:-
In my improvements in steam generators I compose the whole of the boiler of
one or more rows of upright tubes of any approved diameters, standing all round
in a circle and forming the walls of the boiler. These tubes are connected at the
top and bottom by two circular boxes or hollow rings, which are made in two halves
and bolted together, so as to form a steam joint, which can be taken apart for
cleaning purposes, I also use a baffle plate fixed three parts of the way up inside
the boiler for deflecting the heat amongst the upright tubes before passing up the
funnel. I then surround all these tubes with a double casing of sheet iron lagged
between the cases. I also leave spaces between the upright tubes to admit of the
fire passing freely round them. In this boiler I dispense with coaling at the
bottom through a fire door, and coal them from the top, in order to do this. I
have a flat disc covering up the opening at the top of the boiler, this disc is on a
hinge and carries the funnel which is connected by means of a rod to the baffle
plate inside. the boiler this is also on a hinge so that when the funnel and disc are
thrown back for coaling, the baffle plate is lifted up at the same time. In this
boiler the top ring takes the steam from all the tubes from whence it is conveyed to
a small steam chamber inside the boiler, where it is dried and expanded, before
going to the engine.
This boiler in consequence of its circular shape, and the baffle plate, gives a
perfectly even distribution of heat and is entirely self contained.
Dated this 27th day of November 1893.
RICHARD MILLS,
London & County Banking Co., Deptford, S.E.
COMPLETE SPECIFICATION.
Improvements in Steam Generators.
I, RICHARD MILLS, of The London and County Bank, Broadway, Deptford,
Cashier, 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 :-
My improvements in steam generators are illustrated in the drawings hereto
annexed, in which Figure 1 is a vertical sectional elevation of a boiler or generator
constructed in accordance with my invention, and Figure 2 a horizontal section
taken on line X X of Figure 1.
I construct the boiler of one or more rows of upright tubes A, of any suitable
diameter, preferably arranged in a circle, and forming the walls of the boiler.
These tubes are connected at top and bottom by two circular boxes or rings B B³,
made in halves, and bolted together, as shown in Figure 1, so that they can be
taken apart when necessary for cleaning purposes. C is a baffle plate placed
about three fourths of the way up inside the firing space or furnace of the
boiler, and hinged at C' to a frame D fixed by any suitable means to the inner
ring of tubes A or otherwise. The frame D fits close to the inner ring of tubes
and, together with the baffle plate C, serves to deflect the heated gases and flame

page_text: forcing them to pass in amongst the upright tubes A before going to the funnel or
chimney E. I surround the tubes A with a double casing of sheet iron F, filled
with asbestos or other suitable bad conductor of heat, in order to prevent as much
as possible the loss of heat by conduction and radiation, and to prevent the escape
of the hot gases except by the chimney.
In comparatively small boilers of this kind I dispense with the ordinary fire door
near the bottom, and feed the fuel into the furnace G from the top, and for this
purpose I hinge the funnel or chimney E over the opening H in the plate I forming
the top or cover of the firing space or furnace G. The funnel or chimney E is
connected by means of a rod or chain J to the baffle plate C, so that when
the funnel or chimney is turned back on its hinge the rod or chain J raises the baffle
plate C on its hinge C', and there is then a clear space open through which fuel
can be supplied to the fire on the fire bars K, and through which the necessary
firing tools can be introduced when required.
When the funnel or chimney is returned to its upright position the baffle plate C
falls into its closed position.
When the boiler is of sufficiently large dimensions, the funnel or chimney may
be fixed, and a separate opening be made in the plate I for the introduction of the
fuel. This opening would be covered with a hinged or other door which may be
connected with the baffle plate C by a chain or otherwise, so that the two shall
operate together in the same manner as the chimney and baffle plate in the arrange-
ment illustrated. If preferred the connection between the cover of the opening
through which fuel is introduced and the baffle plate may be dispensed with, and
the baffle plate be raised and lowered by any suitable means independent of the said
cover.
In a boiler of this kind the feed water is preferably forced into the bottom
ring B', and circulates through all the upright tubes A round the fire. The top ring B
receives the steam from the upright tubes, and the said steam is thence conveyed
by a pipe L to a coil M, placed inside the fire-space or furnace of the boiler,
preferably above the baffle plate as shown in full lines, or to a steam chamber N
shown in dotted lines in Figure 1 in which coil or chamber, the steam is dried and
superheated before passing to the engine.
In some cases the baffle plate may be made hollow, and water circulated through
it, in order to keep it cool; or such hollow baffle-plate may be used as the steam
chamber, dryer or superheater when the same is not hinged but remains in one
position, and the fuel is fed into the furnace through a side opening in the usual
way. This arrangement is more especially applicable to the larger sizes of boiler.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is.
First. In a steam generator of the kind herein described, the use of a hinged
baffle-plate, substantially as described.
Second. In a steam generator of the kind herein described the use of a hinged
baffle-plate combined with, and operated by, the cover of the opening at the top of
the boiler through which the fuel is introduced, substantially as described.
Third. The improved steam generator consisting of upright tubes connected
together at top and bottom by connecting boxes, a hinged baffle-plate, means
for supplying fuel to the furnace from the top of the boiler, and a steam dryer
or superheater, combined and arranged substantially as described.
1
A
D 1004
R. MILLS,
Per W. H. Beck,
Agent.