IMPROVEMENTS IN STEAM BOILERS OR GENERATORS
Year: 1884

page_text: I DANIEI. NICHOLSON of N° 5 Lees Street Middlesborough-on-Tees in the County
of York Boiler Smith do hereby declare the nature of said Invention for
IMPROVEMENTS IN STEAM BOILERS OR GENERATORS" to be as follows:-
-
My invention consists in constructing a combustion chamber to receive the flame
and gases from the furnace and there to cause their perfect combustion and intensify
their heat by the admixture of a regulated quantity of atmosphere air either at the
natural temperature or it may be heated before admission. It is applicable to any
internally fired boiler but specially to vertical boilers and I will describe it as
applied to such boilers. Immediately over the furnace and communicating with it
by a flue or flues is a cylindrical chamber which I prefer to fit with crosstubes to
promote circulation and for strength. Into this which I call the combustion
chamber I introduce by an opening through the water space and outer shell by.
means of a door a regulated quantity of air to mix with the flame and gases from
the furnace. This combustion chamber is entirely surrounded and covered by.
the water and a flue or flues lead from it through the steam space to a chimney.
The only parts of the boiler not perfectly, circular are the crown of furnace and the
ends of combustion chamber and these are curved convex to the pressure the
former being also stayed by the flue or flues, joining it to combustion chamber
while the top of shell is "dished." and stayed by the flue or flues so that no further
staying is required for ordinary working pressures.
3
The boiler is very accessible both inside the combustion chamber and around it
within the shell (and over, the furnace) space being allowed for a man to get
between it and the shell.
!
As applied to other boilers the construction will be modified but the mixing of
the flame and gases with atmospheric air (heated or not) in a separate combustion
chamber forming the chief feature is effected in a similar manner.

page_text: I DANIEL NICHOLSON of No 5 Lees Street Middlesborough-on-Tees in the County
of York Boiler - Smith do hereby declare the nature of said Invention for
"IMPROVEMENTS IN STEAM BOILERS OR GENERATORS" and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following Statement:—
My invention consists in constructing a combustion chamber to receive the flame
and gases from the furnace and there to cause their perfect combustion and intensify
their heat by the admixture of a regulated quantity of atmospheric air, either at
the natural temperature or, it may be, heated before admission. It is applicable to
any internally fired boiler but specially to vertical boilers and I will describe it as
applied to such boilers. Immediately over the furnace and communicating with
it by a flue or flues is a cylindrical chamber, which I prefer to fit with crosstubes
to promote circulation and for strength. Into this, which I call the combustion
chamber, I introduce, by an opening through the water space and outer shell by
means of a door, a regulated quantity of air to mix with the flame and gases from
the furnace. This combustion chamber is entirely surrounded and covered by
the water and a flue or flues lead from it through the steam space to a chimney.
The only parts of the boiler not perfectly circular are the crown of furnace and the
ends of combustion chamber, and these are curved convex to the pressure, the
former being also stayed by the flue or flues joining it to combustion chamber,
while the top of the shell is "dished" and stayed by the flue or flues so that no
further staying is required for ordinary working pressures.
The boiler is very accessible, both inside the combustion chamber and around it
within the shell (and over the furnace), space being allowed for a man to get
between it and the shell:
As applied to other boilers the construction will be modified but the mixing of
the flame and gases with atmospheric air (heated or not) in a separate combustion
chamber, forming the chief feature, is effected in a similar manner.
The accompanying drawings represent a vertical boiler constructed according to
my invention, Figure 1 being a vertical section transversely through the combustion
chamber and Figure 2 a vertical section at right angles or on centre line x, x;
Figure 1.
A is a cylindrical shell containing the furnace B with fire hole. C is the
combustion chamber connected with furnace by two flues D D and having four
tapered cross tubes E. E. E. E. crossing its diameter at right angles-F is the main
flue or uptake from combustion chamber through crown of shell to join the
chimney-In some cases the main fiue may be taken away from the end of
combustion chamber opposite the air door. One end of the combustion chainber
opens out through shell of boiler and is fitted with a door G through which air in
regulated quantity, by means of adjustable apertures at H, can be admitted (either

page_text: cold or previously heated) to mix with the gases and other products of combustion
from the furnace B as they enter the combustion chamber C. In order to.effect
a thorough mixture I prefer to fit the door G with a deflecting shield K by which
the entering air is directed downward and meets the gases and flame as they issue
from the flues D. D. A manhole is provided in shell at L and gives access to all
the upper interior as well as partial access for examination and slight repairs to the
lower part by the spaces at S, S., Figure 1, between combustion chamber and shell,
these spaces in the larger boilers being considerable. Another manhole is.proposed
to be made at M in some cases especially in the smaller size of boilers.
The application of my invention to other types of boilers involves merely
modifications, the essential features being the same namely, a furnace or furnaces
leading by a flue or flues into a combustion chamber or chambers where the flame,
gases, and other products are acted upon by a current of air, cold or heated, their
mixture producing intense heating power and complete consumption of smoke with
free circulation of water as indicated by arrows.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. The improvements in steam boilers or generators comprised in the several
parts in combination arranged relatively to each other substantially as shewn and
described for the objects named.
2. In boilers or steam generators, the combustion chamber to receive the flame
gases and products from the furnace, with provision for the introduction of air,
cold or heated, in regulated quantity for the purposes of intensifying the heat and
consuming smoke.
W. LLOYD WISE,
Applicant's Agent.