Improvements in Sectional Boilers.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Sectional Boilers.
I, JOSEPH BOND, of 692, Seventh Street, Buffalo in the County of Erie and State
of New York, United States of America, Manufacturer of Steam Heating Apparatus,
do hereby declare the nature of my said Invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the following
statement:-
My Invention relates to sectional boilers and consists of a series of sections which
when secured together form a spiral flue having an intermediate spiral water way or
chamber, whereby an unobstructed spiral flue is provided for the products of com-
bustion, and a spiral passage way within or between the spiral surfaces of the smoke
flue, for the water to circulate through all of which will be fully and clearly hereinafter
described reference being had to the accompanying Drawings, in which :-
Figure 1 is a vertical section through line i, j, Figure 2.
Figure 2 is a plan view.
Figure 3 is a vertical cross section on or about lines ef and g, h, Figures 1
and 2.
Figure 4 is a horizontal section in or about lines a, b and c, d, Figures 1 and 3.
Figure 5 is a perspective view of a single section having the spiral water passage,
and showing one half or a portion of the spiral smoke flue.
Figure 6 is a section through line k, l, Figure 5.
By reference to Figure 5, it will be seen that the sections 1 forming the spiral
passages are each provided with an inclined spiral depression connecting at the top
at 2, and curving in an inclined direction toward the point 3 leaving an opening
this spiral depression forms half of the smoke-flus the other half is formed by the
next section when placed above it.
On the opposite half of the section is a similar depression placed parallel with the
depression 2, 3.
These spiral depressions are each formed of metal of sufficient thickness to stand
the required pressure and are separated far enough apart from each other, for
instance, from the point, 2 to the point 5 to leave the required room between them for
a spiral water passage 6. Extending from each side or from one side of each casing
is a smaller water chamber case 7 projecting out from the main chamber and of less
height than the section. It is provided with a diaphragm 8 running diagonally
across it, (see Figures 1 2 4). These extension portions 7 are made so as to extend
only partly down the side of the section so as to leave room enough to insert a
screw threaded tubular nipple 9 for producing a water tight connection between the
sections as shown in Figure 1. The object of the projecting water chamber
portions 7 is to provide the means for a circulation of the water from one section
up to or into another section and the object of the diaphragms 8 is to compel the
water as it enters the extension chamber, 7, at the lower side of the diaphragm to
pass entirely around the section until it reaches the opposite side of the diaphragm
before it passes up through the tubular nipple connection into the section above it,
when it makes another similar circuit in that section and so on through as many
sections as may be connected together.
The tubular nipples 9 are adapted to screw into holes 11 in the sections see Figure 4.
The base 12 of the boiler is provided with the ordinary ash pit 13 and a door 14.
The grate 15 is made in the usual way, 16 represents the first fire box section, it is
provided with an annular surrounding water chamber, an extension chamber case 7 a
diaphragm 8 and a screw threaded tubular nipple having right and left hand screws
for connecting with the next fire box section, 17. This section 17 is also provided
with a surrounding water-chamber, an extension chamber case 7 a diaphragm, & and a
similar tubular screw threaded nipple 9 for connecting it with the section above it and

page_text: a door 17 a, opening into the fire chamber. These fire box sections inclose the com-
bustion chamber 18 but more of such sections may be used, according to the size of
the combustion chamber. There may also be more or less of the sections containing
the spiral water chambers and smoke flues. The upper periphery of each section is
provided with an upwardly projecting 'flange 19 into which the lower edge of the
section above is fitted.
The rear portions of the sections are held together and a water tight joint is made
by the screw threaded tubular nipples 9. The fore part of the sections are secured by
lugs and bolts 20 a or other equivalent means.
If desired there may be more or less than the number of lugs and bolts shown, or
they may be dispensed with and a series of two or more screw threaded tubular
nipples 9 and extension portions 7 used in lieu thereof, securing the sections together.
In place of the screw threaded tubular nipples 9 an ordinary smooth nipple may be
used and the whole forced together in the ordinary way, or instead of the nipples, any
kind of well known packed joint may be employed. The top section 21 is provided
with a larger area of water chamber 22 also with a rear extension chamber 7 having
a diaphragm 8 and a screw threaded nipple connection.
It is also provided with the outlet for the smoke flue 23 and with a collar 24 to
receive the sinoke pipe see Figures 1 and 2. By this construction a continuous
upward course in a spiral direction is provided for the products of combustion
avoiding sharp turns and the hinderance to a natural draft incident to boilers having
up and down flues or flues having sharp quick turns. It also provides a much longer
continuous passage for the products of combustion which are thereby retained for a
proportionately longer time in contact with the surface to be heated, so as to impart a
larger amount of heat in proportion to the fuel used, to the water, which passes
between the surfaces of the spiral smoke flues. It will be noticed that the smoke fluc
is surrounded on all sides with water, whereby I secure a greater economy in the
consumption of fuel and make the boiler complete in itself, so that it can be used
without the necessity of surrounding it with brick work or other covering.
I therefore avoid considerable expense and inconvenience in setting it up and also
render the boiler more easy of access, and in portable form so that it may be
transported from place to place. I am aware that boilers have heretofore been made
having a portion of the sides of the smoke-flue composed of the brick work
surrounding the boiler but such construction is objectionable for the reason that
imperfections in the brick work or cracks resulting from settling or other causes,
often permits the escape of gas and smoke which is a serious objection. By my con-
struction I avoid all of these objections and also obtain a large increase of water
surface. The threaded nipples for securing the extension portions of the sections
together afford the means for producing a simple and cheap water tight connection
for the water joints, and the sections being alike as regards the fitting of each together,
one or more can be added or replaced at any time, and as the sections above the fire
box are duplicates, any number may be added or taken from the boiler to change its
capacity if desired, or a boiler of any desired size can be easily made up from the
sections depending upon 'the number used, all being interchangeable. The boiler is
self contained requiring no brick work or casing of any kind to make it complete and
consequently it is portable and easily moved about or removed when required. The
inlet openings 25 may be placed at any conveniently arranged point at the lower part
of the boiler, see Figure 1, and the outlet openings 26 may be placed at any
convenient point at the top of the boiler see Figure 3. 27 represents what may be
called a clean out door, its object is to allow access to the smoke flue to clean it out.
I have shown but one but there may be as many more as may be required to enable
the operator to reach the different parts.
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 :-
First. A sectional boiler provided with a spiral smoke flue surrounded on all sides

page_text: by water, for conducting the products of combustion, from the fire-chamber to the
outlet, spirally up through the water within the boiler, substantially as described.
Second. In a boiler composed of sections each having a spiral water passage, the
combination therewith of extension portions connected by screw threaded nipples for
connecting the spiral passage of each section, thereby forming a spiral passage in a
continuous forward and upward direction around the boiler from the inlet to the
outlet substantially as described.
Third. A sectional boiler provided with a spiral smoke flue for conducting the
products of combustion from the fire chamber up through or around the boiler, in
combination with a spiral water passage for conducting the water between or around
the heating surfaces from the inlet to the outlet of the boiler, substantially as
described.
Fourth. In a sectional boiler, a series of sections, duplicates of each other above the
fire chamber, forming a spiral smoke flue within the boiler, in combination with a
spiral water way surrounding the smoke flue on all sides except the inlet and outlet,
substantially as described.
Fifth. In a sectional boiler, a boiler section, having a spiral recess on each sido
forming a portion of a spiral smoke flue and an intermediate spiral water way or
passage in combination with an extension chamber provided with a diaphragm
interposed between the inlet and outlet openings to prevent the water from
reaching the outlet until after it has made a circuit around the section, substantially
as described.
Sixth. In a sectional boiler, a series of sections having an annular water chamber
and extension water chambers provided with diaphragms for causing a circulation of
the water, a base portion carrying the grate and screw threaded tubular nipples for
producing a water tight joint and securing them together the whole forming the
combustion chamber, in combination with a series of sections each having a spiral or
half spiral smoke flue on opposite sides and an intermediate spiral water chamber
communicating with an extension water chamber having a diaphragm for causing the
water when it enters the section to pass around it before it passes through the outlet,
screw threaded tubular nipples for securing the extension water sections and bolts for
securing the main sections, whereby a combined spiral smoke flue and water way is
provided substantially as and for the purposes, described.
ես
On day
1003.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.