Improvements in Steam Boilers.
Year: 1896

page_text: Date of Application, 24th Mar., 1896-Accepted. 9th May, 1895
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman, (a communi-
cation to me from abroad by La Compagnie Internationale des Procédés Adolphe
Seigle of 147 Rue de Courcelles, Paris, France, 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:-
This invention has for its object a boiler having an inner removeable furnace.
This apparatus forms in itself a complete generator, but it may also form an
element of a compound boiler of any suitable type.
In the annexed drawings a boiler in accordance with this invention is shown,
both alone and in connection with boilers of other types.
Two examples of the application of the boiler are shown but it may be applied
and combined in other ways.
In the drawings :
Figure is a central vertical section of a boiler in accordance with this invention;
it has an inner removeable furnace.
Figure 2 is a section on the line 2-2 of Figure 1.
Figures 3 to 6 show applications of this boiler.
Figure 3 is a vertical section of the boiler with other parts and forming an
upright combination.
Figure 4 is a plan of the arrangement shown in Figure 3.
Figure 5 is a longitudinal section showing the boiler arranged as part of a
multitubular system of the torpedo boat boiler class.
Figure 6 is a transverse section.
In these figures :-
A A A are three cylinders of increasing diameter forming the combustion
chamber or furnace.
These cylinders are arranged in such a manner that the outlet from the first is
smaller than the inlet to the following and so on as shown.
B is an outer cylindrical casing forming a reservoir for water and steam.
CC are separable joints, allowing the combustion flue to be taken out.
D are inlet tubes admitting air to feed the flame.
E E are air boxes placed between the cylinders, to which air is led by the
tubes D.
F is a feed pipe, it brings in the water to be vaporized.
G is the outlet pipe and g the steam cock.
His a sprayer or gasefier, it is fed with heavy hydrocarbons for the heating.
As will be seen the cylinders and air boxes constituting the combustion chamber,
form a very elastic structure which can expand and contract without injury.
The separable joints allow the furnace to be taken out for cleaning and repairs.
Three cylindrical shells are here shown but there may if required be a greater
umber.
In Figures 3 and 4 the boiler shown in Figures 1 and 2 is arranged as part of a
vertical structure.
The same letters designate the same parts as in the preceding figures; the
dditional elements which enter into this special application are:-
N the chimney.
D

page_text: Qa pipe leading steam from the steam chest P to the superheater R which is
made up of two concentric tubes as shown.
S a fire box which receives the gases from the combustion chamber and allows
them to pass into the tubes T.
U is a pipe supplying superheated steam to the heating apparatus or sprayer H.
The feed water is led by the pipe F into the cylindrical body B in which it is
vapourized.
The steain generated collects in the upper portion of the cylindrical body B in a
space P forming a reservoir of steam.
The steam then passes by the pipe Q into the superheater R and thence by the
pipe G into the cylinder of the steam engine or elsewhere.
In Figures 5 and 6 the boiler shown in Figures 1 and 2 forms part of a
multitubular system.
The same reference letters indicate the same parts as in Figures 1 and 2; the
additional elements which enter into this special application are:-
1 tubes leading from the lower collector to the cylinder B of the boiler.
J the steam dome.
Ka tube for the descent of the water; it also connects the cylinder B, and the
collector.
La flue for the return of the hot gases.
M baffles for increasing the travel of the hot gases on their way to the gas
chimney N.
O a collector into which the tubes I open.
The arrows
indicate the circulation of the combustion gases and the arrows 2
that of the water or steam.
The working of this boiler will be understood from the inspection of the
drawings.
The vertical boiler shown in Figures 3 and 4 may with slight modification be
arranged to work when horizontal or in an inverted direction.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is :-
1. A boiler having an inner removeable furnace formed by the combination of a
furnace or combustion chamber composed of a succession of cylinders arranged so
that the outlet of one is smaller than the inlet mouth of the next, and air boxes
with suitable pipes between the cylinders for furnishing the air necessary for
combustion, with a cylinder in which the water to be vapourized is introduced, the
combustion chamber being mounted in such a manner as to be capable of being
easily withdrawn and replaced.
2. The combination of the boiler forming the subject of Claim 1 in a system
such as shown in Figures 3 and 4, or the like.
3. The combination of the boiler forming the subject of Claim 1 with a multi-
tubular system such as that shown in Figures 5 and 6 or the like.
4. The apparatus substantially as described and shown in the accompanying
drawings.
Dated this 24th day of March 1896.
SYDNEY PITT.