An Improved Tubular Sectional Steam Boiler.
Year: 1894

page_text: Date of Application, 13th Aug., 1894-Accepted, 15th Sept., 1894
COMPLETE SPECIFICATION.
An Improved Tubular Sectional Steam Boiler.
I THOMAS HENDERSON of Mill Hill Road Waverley near Sydney in the Colony
of New South Wales Iron Ship Builder 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 relates to an improved tubular sectional steam boiler in which the
whole or nearly the whole of the gases of combustion will be utilized in converting
the feed water into steam or dry steam and in which practically no or very little waste
heat escapes into the atmosphere.
This improved tubular sectional steam boiler, consists of a number of tubular
sections connected rigidly end on to one another and having pipe connections from
the end farther from the combustion chamber of one section to the end nearer the
combustion chamber of the section nearer to said combustion chamber. When
placed vertically one upon the other as is preferred the lower tubular section has an
ordinary fire box made therein or it may sit upon a brick or other fire box or
furnace and when placed horizontally one against the other one end section is
constructed similar to a locomotive or semi-portable steam boiler. In connecting
the tubular sections one to the other a novel construction of holding joint is used
having an internal ring into which take stud bolts from the outside so as to clamp
or hold both abutting sections in position.
But in order that this invention may be clearly understood reference will now be
made to the drawings herewith in which
Figure 1 is an elevation partly in section of an improved steam boiler constructed
according thereto the combustion chamber or fire box being omitted.
Figure 2 is a section of the boiler taken just above or below a tube plate
Figure 3 is a plan of same.
Figure 4 is a sectional elevation of a lower tubular section containing a combustion
chamber or fire box and
Figure 5 is a section of a brickwork or masonry furnace on which a construction
such as that shown in Figure 1 might rest.
Figure 6 is a detail of joint between two abutting tubular sections.
Though five tubular sections 1^, 2^, 34, 44, 5A, are shown there is no restriction to
the number so long as there is any heat in the escaping gases of combustion which
will pass through the tubes. Each section is constructed with its cylindrical shell A
rivetted to flanged tube plates B between which tube plates are the tubes C. On
the top of the higher sections suitably supported by it is a funnel or an escape pipe
to a chimney stack. The joint between abutting sections is made by means of
internal cylindrical ring B₁ taking against the heads A' of the rivets of the sections
and acting as a clamp or holding piece screwed up tightly by means of stud bolt B²
whose head takes half upon each abutting edges of the tubular sections. Pipe 1"
supplies feed water from a pump or high level reservoir into top-section 14 at its
lower end. Pipe 2D joins top of section 1 to bottom of section 24 pipe 3D connects
top of section 2 to bottom of section 3. Pipe 4º connects top of section 34 to
bottom of section 4. Pipe 5º connects top of section 34 with bottom of section 5^.
Said section 54 is supposed to rest upon a combustion chamber as shown in Figure 5
or to be replaced by combustion section 5* as shown in Figure 4 in which latter
event pipe 5 would connect with the lower part of the water space of said
combustion section 5*. Pipe 6º connects the top of section 4* to the top of section 5*
or to the top of the combustion section 5*. Pipe E is steam supply or service pipe
to where required.

page_text: The feed water is supplied by pipe 1° to the section 14 and as it extracts the heat of
the gases of combustion passing upwards through the tubes C of said section 1^ it
moves upwardly to the pipe 2D where the hotter part flows to section 2ª thence
farther heated to section 34 and thence into either of the lower sections 4* or 5* or
to both as may be desired according to regulation of cocks or valves provided for
the purpose. The two lower sections 4 and 5 or as substitute for the latter the
combustion section o* shown in Figure 4 may be termed "6 evaporators while the
other sections may be called "water heaters" and the evaporators are connected by
pipe 6 so as to provide increased steam space. It will be seen that according to
the number of sections used so more or less of the heat of the gases of combustion
passing through the tubes will be extracted by the water constantly travelling in
the opposite direction towards the combustion section or fire box or furnace.
"
With a horizontal construction of this improved tubular sectional steam boiler
the gases of combustion would travel through similarly connected tubular sections
in one direction and the water travel from the top of the water space of one section
to the bottom of water space of the next in the opposite direction towards the
combustion section or furnace.
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-
First: An improved steam boiler consisting of tubular sections connected rigidly
end on to one another and having water connections from the hotter part of one
section to the cooler part of the section nearer the combustion chamber or fire box
or furnace substantially as herein described and explained.
Second. An improved tubular sectional steam boiler having the heat passing in
one direction through the tubes in each section and the water flowing through each
section from its upper part to the lower part of the next succeeding section in the
opposite direction substantially as herein described and explained and as illustrated
in the drawings.
Third. An improved tubular sectional steam boiler having a joint between each
section consisting of a cylindrical ring bearing on the rivet head of the tube plate
flanges of each abutting section and clamping stud bolts taking into said ring and
bearing partly on the outside of each of said abutting sections substantially as
herein described and explained and as illustrated in the drawings.
Dated this Twenty-first day of June One thousand eight hundred and
THOS. HENDERSON.
G. F. Redfern & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.