Year: 1886

page_text: I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Engineer do hereby declare the nature of this invention (a communication from
William Cooke of Orr Lake, in the County of Simcoe Canada, Miller) 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 this invention is to design a steam boiler in which the steam will
be generated with the least possible consumption of fuel; and it consists, essentially,
in placing over the furnace of the boiler a rectangular chamber containing a series
of horizontal tubes having open ends to communicate with a water space on each
side of the chamber, and which is placed within an outer shell between which and
the inner chamber a suitable water space is left. The outer shell is extended above
the inner chamber so as to leave a chamber above the latter for steam. The top
of the tube chamber is closed and is provided with a suitable number of smoke
pipes to extend through the steam chamber so that the smoke and heated gases
passing from the furnace below the tube-chamber, pass through the latter, and
thence through the pipes into the smoke-stack..
Figure 1 is a perspective view of this improved boiler with one detachable side
removed.
Figure 2 is a sectional elevation of same.
A, represents the furnace.
B, is a rectangular chamber containing a series of horizontal tubes C and placed
as indicated immediately over the furnace A so that the smoke and heated gases
from the furnace shall pass upwardly between all the tubes till it reaches the top
row of the latter, thence through the smoke pipes D, into the smoke-box E, and
thence into the smoke-stack F.
a is a water-space formed between the outer-shell G and shell of the tube-
chamber B. This space extends down below the chamber B, and surrounds as
indicated, the furnace A. The top of the space a, communicates with the steam-
space H, which may be made any desirable size, as the experience of the engineer
constructing the boiler may suggest.
'

page_text: The tube-chamber B, is suitably stayed to the outer-shell G. The sides of the
shell G opposite to the ends of the tubes C are detachably connected so that they
may be readily removed for the purpose of permitting the tubes C, to be cleaned.
In addition to securing the detachable sides I to the shell G by bolts 6 I provide
at suitable distances apart stay rods d which are each carried through a tube and
the sides I opposite to each other so as to brace the latter firmly together.
As the smoke-pipes D, pass through the steam space H the steam contained
therein is, to a certain extent superheated thereby ensuring dry steam from this
boiler.
By holding the water in a series of tubes suspended over the furnace and so
arranged that the heated gases arising therefrom must, in passing out, surround the
said tubes, I secure a boiler which will generate steam much more rapidly than an
ordinary boiler in which the smoke and heated gases pass through tubes surrounded
by a large body of water.
Of course this invention is not confined to any particular size of boiler, and a
boiler constructed in accordance with this invention may be used for house-heating
purposes, as well as for steam engines.
.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent I declare that what I claim is :-
1. A steam boiler consisting of a tube-chamber B containing a number of
horizontal tubes C located above a furnace A and communicating with a water-
space a, which leads into a steam-space H substantially as and for the purpose.
2. A steam boiler consisting of a tube-chamber B containing a number of
horizontal tubes C located above a furnace A and communicating with the water
space a which leads into a steam space H in combination with the smoke pipes D
connecting the tube-chamber B with the smoke-box E and passing through the
steam space H substantially as and for the purpose specified.
Dated this 20th day of February 1886.