Year: 1886

page_text: I, OWEN MEREDITH of 8 Ambra Vale South, Clifton, in the City and County of
Bristol, Foreman Boiler Maker, do hereby declare the nature of this invention to be
follows:
:
as
My invention relates to an improved construction of the furnaces and flues of steam-
boilers.
My invention consists in constructing the said furnaces and 'flues in tubular
sections, and in forming the said sections with one or a number of circumferential
conical corrugations tapering longitudinally or in the direction of the length of the
section. The said sections are united together by a circumferential seam formed by
fitting the end of one section into that of the next in the series, the sections being so
formed that the said circumferential seam is, made at the highest point of one of the
corrugations. In some cases only one section will be required in either furnace or
flue.
Both the furnace, and the flue sections can be made of iron, steel, or copper plates,
each section being bent round and welded or rivetted at longitudinal joint before
being corrugated, or vice versa, i.e. corrugated before being welded or rivetted at its
longitudinal joint; or each section may be jointless not requiring welding or rivetting.
The advantages of my invention are increased strength of the furnace and flues to
resist collapse, an increased and more effective, heating surface, the circumferential
seams, in the furnaces and flues are out of the travel of, the flame, and the sections
can be readily taken out at the circumferential seams if required for cleaning, repair or

page_text: COMPLETE SPECIFICATION.
Improvements in the Furnaces and Flues of Steam Boilers.
I, OWEN MEREDITH, of 8 Ambra Vale South, Clifton, in the City and County of
Bristol, Foreman Boiler Maker, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, reference being had to the accompanying
drawings forming part of this specification:-
:-
My invention relates to an improved construction of the furnaces and flues of steam
boilers.
My invention consists in constructing the said furnaces and flues in tubular sections,
each of the said sections being formed with one or a number of circumferential conical
corrugations tapering longitudinally or in the direction of the length of the section.
Or the said sections may be formed with both rib and conical corrugations. The said
sections are united together by a circumferential seam or joint, formed by fitting the
end of one section into that of the next in the series, the sections being so formed that
the said circumferential seam or joint is made at the highest point or extreme circum-
ference of one of the corrugations. Or the said sections may be united by flanges
formed on the ends of each section, the said flanges being rivetted together, with an
interposed ring of metal between them. In some cases only one section will be
required in either furnace or flue.
Figure 1 is a longitudinal section of one of the sections of a furnace or flue, showing
one form of the circumferential conical corrugations, and the joint with the next
section.
Figures 2 and 3 show other forms of circumferential conical corrugations.
Figure 4 is a longitudinal section of a portion of a furnace or flue with both conical
and rib corrugations.
Figure 5 is a longitudinal section of portions of three tubular sections, having conical
and rib corrugations and showing also the method of uniting the sections by fitting
the end of one section into the end of the next in the series.
Figure 6 is a similar view to figure 5 showing the method of uniting the sections
"by flanges formed on the ends of the said sections.
Figure 7 is a longitudinal vertical section of the furnace of a vertical steam boiler,
corrugated according to my invention.
Figure 8 is a longitudinal vertical section of the furnace and part of the flue of a
cylindrical steam boiler constructed according to my invention.
Like letters indicate like parts throughout the drawings.
Each furnace or flue may be composed of one or a number of tubular sections A of
suitable length and circumference. Each of the said sections is formed with one or a
number of circumferential conical corrugations a, the said corrugations tapering in the

page_text: direction of the length of the tubular section as shown in figures 1, 2 and 3. Or the
said tubular sections may be formed with conical corrugations a and rib corrugations b
alternately as shown in figures 4 and 7, the ribs & being alternately on the inner and
outer circumference of the tubular section. Or the said sections may he corrugated
with rib and conical corrugations as shown in figures 5 and 6, a rib being formed on
the inner circumference near each end of each section.
The tubular sections A composing the furnace or flue are united together by a
circumferential seam formed by fitting the end of one section A into the end of the
next section in the series, the said seam being formed at the extremè circumference of
one of the corrugations as shown in figure 1, or, as shown in figure 5, between two
internally projecting ribs b. For this purpose, one end c of each section is formed as a
socket, the other end d of the said section being of reduced diameter to fit the socket e
of the next section of the series. Or the said tubular sections are united together by
flanges e formed by flaring each end of each section outward as shown in figure 6, the
flanges of adjoining sections being rivetted together with an interposed ring of metal f
between them.
In figure 7, B is the furnace consisting of a single tubular section A, C is the front
of the boiler and front tube-plate and D is the back tube-plate. In figure 8, E is the
furnace, F is the flue and G is the boiler front. The furnace in this case is composed
of one section, and the flue of several sections A.
The tubular sections both of furnaces and flues may be made of iron, steel, or copper
plates and each tubular section may be bent round and welded or rivetted at its
longitudinal joint before being corrugated, or the plate of which the section is formed
may be corrugated first and afterward bent round and welded or rivetted at the
longitudinal joint. Or each section may be jointless requiring neither welding nor
rivetting longitudinally.
The advantages of my invention are, increased strength of the furnace and flues to
resist collapse, an increased and more effective heating surface, the circumferential
seams in the furnaces and flues are out of the travel of the flame and, when the sections
are united together as shown in figures 1 and 5, any one or more of the said sections
can be readily taken out at the circumferential seams if required, for cleaning, repair
or renewal.
I do not limit myself to the arrangements of the corrugations herein described and
shown, but
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 :-
Furnaces or flues of steam boilers, constructed of one or more tubular sections
having circumferential conical corrugations, or having circumferential rib and conical
corrugations, substantially as herein described and illustrated in the accompanying
drawings.
T. N. PALMER & Co.,
For the Applicant.