Improvements in Steam Boilers.
Year: 1891

page_text: Date of Application, 26th Oct., 1891
Complete Specification Left, 26th Aug., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
I, ROBERT CARSON, of Kingston-upon-Hull, in the County of Yorkshire,
Marine Superintendent, do hereby declare the nature of my invention to be as
follows:-
My invention relates to steam boilers and has for its object the special con-
struction of the boilers whereby the furnaces combustion chamber and tubes are so
arranged in a special and novel manner, that they are surrounded by water or
steam and abstract a maximum quantity of heat produced by the fuel during
combustion.
I carry out my invention as follows:-I place the furnaces in which the fuel is
burnt in such a position within the outer drum or shell of the boiler, that they allow
of a drop combustion chamber or chambers being fitted at their back end, from
which chamber or chambers a series of tubes, having one end supported in the wall
of the chamber, convey the heat to the front end of the boiler where the opposite
ends of the tubes are supported.
At this end a smoke box or second combustion chamber is situated which forms
a connection with an upper series of tubes, situated above the furnaces and first
named combustion chambers, the tubes are of larger diameter than the lower ones
and extend the whole length of the boiler from front to back, where they
communicate with the uptake or funnel.
These latter tubes may be so placed as to return the gases once twice or more
times in a zig-zag path from end to end of the boiler.
By these means I am able to utilize a greater proportion of the caloric than is
usually done by ordinary boilers, by which the efficiency of the boiler is consider-
ably increased.
The risk of overheating of plates caused through shortness of water, by carelessness
of the attendant, by priming, by leakage, or other causes is much reduced, as
owing to the increased height of the upper tubes a greater range of water level is
provided.
The upper or return tubes or any portion of them may be used for superheating
the steam if required.
Two boilers may also be placed back to back and joined together by connecting
tubes, with the uptake placed between them thus doubling the boiler power without
increasing the number of steam and water mountings required for one boiler only.
Dated this 26th day of October 1891.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
I, ROBERT CARSON, of Kingston-upon-Hull, in the County of Yorkshire,
Marine Superintendent, do hereby declare the nature of my invention, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My invention relates to steam boilers and has for its object the special con-
struction of the boiler whereby the furnace, combustion chamber, and tubes are so
5. arranged in a special and novel manner, that they are surrounded by water and
steam, and abstract a maximum quantity of heat, from the fuel during combustion.

page_text: In order that my invention may be the better understood, I will now proceed to
describe the same in relation to the drawings hereunto annexed, reference being
had to the letters and figures marked thereon. Like letters refer to like parts in
the various figures.
4.0
Figure 1 is a front elevation of my improved boiler with the right hand side in
section.
Figure 2 is a side sectional elevation.
Figure 3 is a view showing two of my boilers arranged back to back, with pipes
connecting the steam and water spaces.
I carry out my invention by placing the furnaces a in which the fuel is burnt in
such a position within the outer drum or shell of the boiler that they allow a drop
combustion chamber or chambers 6 being fitted at their back end, from which
chamber b a series of tubes d having one end supported in the wall of the chamber.b
convey the heat to the front end of the boiler, where the opposite ends of the tubes
are supported.
At this end a smoke box or second combustion chamber e is situated, which
forms a connection with an upper series of tubes ƒ situated above the furnaces a
and the tubes d.
The tubes fare preferably of larger diameter than the tubes d and extend the
whole length of the boiler from front to back, where they communicate with the
uptake or funnel g. I may arrange these tubes fso that they convey the gases
once, twice, or more times, in a zig-zag path, from end to end of the boiler, that is
to say that the gases travel, toward the uptake through the lower row of tubes f
return to the front by the second row, and return to the back and thence to the
uptake by the top row.
I arrange a tube or tubes C communicating to the combustion chamber b in
order to admit air to that compartment, and also to permit the discharge of ashes
accumulated therein.
In Figure 3 I show two boilers connected together, back to back, discharging
the gases into a common uptake g. I arrange connecting pipes h h in the steam
and water spaces and thus convert two single boilers into one double ended one.
This method of connecting the boilers permits the use of only one set of steam
and water mountings.
I do not confine myself to the exact arrangement or construction as shown and
described, as it is obvious that it may be varied without departing from my
invention.
The upper and return tubes for any portion of them may be used for super-
heating the steam.if desired.
By the arrangement of flues, combustion chamber, and tubes, according to
my invention a larger amount of heating surface is obtained in a given capacity of
boiler, a greater degree of evaporative efficiency is effected, less straining of plate
joints takes place and consequently reduced leakage, as the expansion and tempera-
ture is more uniform at the top and bottom parts of the boiler; increased and more
efficient circulation is effected and lessened risk of over-heating of the plates
through shortness of water caused by accident or neglect and the convenience of
using the upper tubes for superheating is also a point of advantage.
Having now particularly described and ascertained the nature of my invention,
and in what manner the same is to be performed, I declare that what
claim is :-
F
1st. In a boiler, a furnace or furnaces leading into a combustion chamber or
chambers within the shell, and tubes communicating from the said combustion
chamber or chambers through the boiler with the front of the boiler 'in combination
with a front combustion chamber or chambers and tubes leading therefrom passing
through the boiler to the uptake substantially as described,
2nd: In such a boiler an air tube communicating to the combustion chamber.
or chambers substantially as described:

page_text: 3rd. The arrangement of boilers, combustion chambers, and uptakes, substantially
as described and illustrated in Figure 3 of the accompanying drawings.
4th. The arrangement and construction of a boiler substantially as described
and illustrated in Figures 1 and 2 of the accompanying drawings.
Dated this 26th day of August 1892.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.