Improvements in or relating to Locomotive, Cornish, and other Boilers.
Year: 1893

page_text: Date of Application, 1st De., 1893
Complete.Specification Left, 24th Aug., 1894-Accepted, 29th Sept., 1894
Improvements in or relating to Locomotive, Cornish, and
other Boilers.
I, EDWIN SCHOLEFIELD, of Burley Vale Mills, Kirkstall Road, Leeds, in the
County of York, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to improvements in boilers, such as locomotive,
Cornish, and Lancashire, that are employed for generating steam. The object of
this invention is to afford increased facilities for the circulation of the water, and to
increase the heating surface of the boiler.
According to this invention in the flue or flues, say for example of a locomotive,
Cornish, or Lancashire boiler, I fix, beyond the firebox and bridge, to the inner
periphery of each flue any desired number of plates, hereafter termed division
plates. In cross section, the division plates are preferably made somewhat in the
form of a V or U with an attaching flange or lip turned inwards, but I distinctly
wish it to be understood that I do not limit myself to these shapes, as any other
shape that will accomplish the object I have in view may be used. The division
plates are fixed to the inner periphery at suitable distances apart, and to project
inwards to within a suitable distance of the centre of the flue so as to leave, if
desired, a central water space running the full length, or nearly so, of each plate or
plates forming the flue. The division plates may also, if desired, be provided with,
or without, a flange or flanges projecting above, say, the V portion and connections
to the inner periphery of the flue. The division plates are suitably stayed and
arranged to extend the whole length, or nearly so, of each of the plate or plates
forming the flue.
When say two, or more, of the above described V shaped division plates are
fixed within the flue at a suitable distance apart the space between them may form
a passage through which the water may circulate. Suitable holes, apertures, or
perforations being provided in the outer shell of the flue over each water way,
formed as described, through which the water may pass. The end of each water
way may be closed with a suitable plate.
The position of the said water ways may be arranged to intercept, if preferred,
each other in every alternate length of plate or plates forming the flue, or to form
a series of continuous flues arranged within the ordinary flue or flues, and in either
case with or without a combustion chamber between each set of water ways. The
water ways and flues may be reversed, that is to say, the V portion of the division
plates becomes the water way and in that case may be separate and connected by a
flange to the flue.
In addition to the above described water ways, and when preferred, though not
necessarily so, in the furnaces of the said boilers I form the portion forming its roof
and sides of a series of deep corrugations, undulations, or tubes of any convenient
size and shape. These corrugations, undulations, or tubes are so arranged that they
may finish at or about the level of the firebars, and they may also be arranged
transversely, longitudinally, angularly, diagonally, or in any other convenient
direction or position within or across the said furnace.
Dated the Thirtieth day of November 1893.

page_text: other Boilers.
I, EDWIN SCHOLEFIELD, of Burley Vale Mills, Kirkstall Road, Leeds, in the
County of York, Engineer, 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 :-
This invention has reference to improvements in boilers, such as locomotive,
Cornish, and Lancashire, that are employed for generating steam. The object of
this invention is to afford increased facilities for the circulation of the water, and
to increase the heating surface of the boiler.
In the drawings
Figs. 1 and 2 are respectively an end elevation and a longitudinal section of a
Cornish boiler with my invention applied.
Figs. 3 and 4 are respectively a part transverse section of the boiler, and a
sectional elevation of a portion of the flue drawn to a larger scale than Figs. 1
and 2.
Figs. 5, 6, and 7 are respectively a part sectional elevation, a transverse
section, and a part sectional plan of a locomotive boiler with my invention
applied.
Figs. 8 and 9 are enlarged transverse section, and sectional elevation of a portion
of a fue constructed according to this invention.
Figs. 10 and 11 are a part sectional élevation, and a transverse section of a
locomotive boiler with a portion of this invention applied.
Like parts in all the views are marked with similar letters of reference.
At Figs. 1 to 4 A is the shell of the boiler, B the flue, C the fire bars, D the
firebox, and E the bridge. All these parts with the exception of the flue may be
of ordinary and well known construction.
To the internal periphery of the flue B, at a suitable distance beyond the
firebox D and bridge E,-is fixed a number of plates F, hereafter termed division
plates. In the drawings, six division plates F are shown, but their number may be
varied as circumstances require.
In cross section, the division plates F are preferably made somewhat in the form
of a V or U with an attaching flange or lip ¹ turned inwards, but I distinctly wish
it to be understood that I do not limit myself to these shapes, as any other shape
that will accomplish the object I have in view may be used. The division plates F
are fixed, as described, to the 'inner periphery of the flue B at suitable distances
apart, say one set, which as illustrated in the drawings would be six to each
plate forming the flue, and they are arranged to project inwards to within a
suitable distance of the centre of the flue so as to leave, if desired, a central water
space Frunning the full length, or nearly so, of each plate or plates forming the
flue. In the drawings, the central water space F* is shown to run nearly the full
length of each plate. The division plates F may also, if desired, be provided with,
or without, a flange or flanges projecting above, say, the V portion and connections
to the inner periphery of the flue. The division plates F are suitably stayed or
fastened together by bolts or rivets F3 as shown, and they are arranged to extend
the whole length, or nearly so, of each of the plate or plates forming the flue.
When say two, or more, of the above described V shaped division plates F are
fixed within the flue B, at a suitable distance apart, the space F between them

page_text: may form a passage through which the water may circulate. Suitable holes,.
apertures, or perforations F, say one or more for each passage F-three are shown
in the drawings are provided in the outer shell of the Hue B over each water.
way F formed as described, through which the water may pass.
water way F may be closed with a suitable plate F*.
water ways.
The end of each
The position of the said water ways F may be arranged to intercept, if
preferred, each other in every alternate length of plate or plates forming the flue B,.
or to form a series of continuous flues arranged within the ordinary flue or flues,
and in either case with or without a combustion chamber between each set of
In the arrangements shown in the drawings the V shape spaces F7
are employed for the conveyance of the smoke, gases and other products of com-
bustion to the chimney, or when preferred the smoke, gases and products of
combustion may be arranged to pass along or through the passages F and the
V portion F of each of the division plates F would then become the water-way
and in that case it would be diminished in size and made separate and connected
by a flange to the flue.
At Figs. 5 to 7 I have shown the herein described division plates F applied to
the boiler of a locomotive, and in the top and sides of the furnace or firebox D.
are arranged, by bending the plates so as to form a series of deep corrugations,
or undulations Ġ whereby additional water and heating space is provided.
In the drawings four of these deep corrugations G are shown, but they may be
of any other convenient shape and size, also their number may be increased or
diminished as circumstances require. The corrugations G are shown arranged
transversely and pass round the firebox D so as to finish also at or about the level
of the firebars. They may also be arranged longitudinally, angularly, diagonally,
or in any other convenient direction or position within or across the furnace. The
corrugations G are stayed together by the bolts or rivets G as shown. When
desired the whole or any number of the sections of the flue B may be provided
with deep corrugations or undulations G stayed together by bolts or rivets G¹ as.
shown at Figs. 8 and 9.
In some cases it may be found more advantageous to use a number of diagonal.
pipes Heither above, or in combination with the division plates F and corru-
gations G, one or both. When used alone the flanges h of the pipes H are
respectively fixed to the top of the furnace and to its sides as shown at Figs. 10.
and 11.
I wish it to be distinctly understood that the herein described division plates F,
corrugations G, and pipes H may either be used separately or combined.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. A steam generating boiler substantially such as described, having a flue or
Aues armed at intervals with a number of V or other shaped division plates such
as F projecting into said flue or flues to form water circulating and smoke passages
substantially as and for the purposes described and illustrated in the accompanying-
drawings.
2. In a steam generating boiler such as described, the combination with the
firebox or flue, one or both, of the deep corrugations or undulations, such as G.
and stays, such as G', substantially as and for the purposes described and illustrated
in the accompanying drawings.
3. In a steam generating boiler such as described having a flue or firebox, one
or both, corrugated or undulated as described in combination with the inwardly
projecting division plates fixed to the interior of the said flue substantially as and
for the purposes herein described and illustrated in the accompanying drawings.
4. In a steam generating boiler such as described the combination of a flue B
armed with a series of inwardly projecting division plates such as F, of pipes such
as H arranged substantially as and for the purposes described.

page_text: 5. In a steam generating boiler such as described the combination of the-
inwardly projecting division plates F, corrugations or undulations G, and pipes H,.
with the flue or flues B and firebox or furnace D substantially as and for the
purposes herein described and illustrated in the accompanying drawings.
Dated this Twenty-third day of August 1894.
EDWIN SCHOLEFIELD.