IMPROVEMENTS IN CON- STRUCTING OF FURNACES, AND HEATING WATER AND OTHER FLUIDS
Year: 1846

page_text: DIDIS SPECIFICATION
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
SPIBY, of Carrington, in the County of Nottingham, Engineer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent, under the Great Seal of Great Britain, bearing date at
Westminster, the First day of April, in the ninth year of Her reign, did, for
Herself, Her heirs and successors, give and grant unto me, the said William
Spiby, my exors, admors, and assigns, Her especial licence, full power, sole
privilege and authority, that I, the said William Spiby, my exors, admors
and assigns, or such others as I, the said William Spiby, my exors, admors,
or assigns, should at any time agree with, and no others, from time to time
and at all times during the term of years therein expressed, should and law-
fully might make, use, exercise, and vend,' within England, Wales, and the
Town of Berwick upon Tweed, my Invention of "IMPROVEMENTS IN CON-
STRUCTING OF FURNACES, AND HEATING WATER AND OTHER FLUIDS;" in which
said Letters Patent is contained a proviso that I, the said William Spiby,
shall cause a particular description of the nature of my Invention, and
in what manner the same is 'to be performed; to be inrolled in Her said
Majesty's High Court of Chancery within six calendar months next and
immediately after the date of the said in part recited Letters Patent, as in
and by the same, reference being thereunto had, will more, fully- and at
large appear...
'

page_text: structed according to my Invention; Figure 2 is a plan in section of the fur-
nace; Figures 3 and 4 are two sections taken through the boiler and furnace
at the dotted lines in Figure 1. The flue a is so arranged that in passing
from the furnace it passes under the boiler, then returns under one side of the
boiler and passes under the bridge; and it passes under the other side of the
boiler, and then away to the chimney. This will readily be understood by
observing the course of the arrows in Figure 2, the central portion of the flue
or fire bed a being separated from the side flue a¹ by the partition b, and from
the side flue a² by the partition c, as is shown, the cross flue as under the
bridge d connecting the flue a¹ with a². The bridge d, it will be seen, is con-
tracted, so that it is much narrower than the width of fire bars in the furnace,
and on either side over the bridge is an opening from an air passage; the
object of this arrangement being that air, either in the natural state or heated,
shall come in over the bridge, in such manner as to tend to cross over the sur-
face of the bridge and meet together in the centre, so that the product coming
from the furnace may meet with such opposite currents of air, and thus ensure
a full supply of oxygen to the unignited products. It will be understood, on
examining this Drawing, that there are three peculiarities of construction in this
furnace; the peculiar arrangement of the flues so arranged as to pass under the
bridge; the contraction of the bridge to allow of such arrangement of flues, and
the using of openings above the bridge, so as to introduce streams of air, in
such manner as to tend to cross from side to side: And it is these improve-
ments which constitute the peculiarity of construction of furnaces constructed ac-
cording to my Invention. And such improvements are also applicable to other
steam boilers, and to boilers for boiling and evaporating fluids, and to other
arrangements of furnaces, and the parts will only require such modifications as
the peculiar circumstances of construction of different furnaces may call for
And in order to give the workman the best information, that he may appliy my
Invention under differing circumstances, I have attached to this my Speci
fication, other Drawings, showing my Invention applied to other constructions

page_text: of furnaces. Figure 5 shows a longitudinal section in elevation; Figure 6 a
plan, and Figures 7 and 8 two sections of a wagon steam boiler with its
furnace, in which the parts, though modified, are similar to those shown in tho
previous Figures, and they are marked with the same letters of reference.
And the description above will apply equally to these Figures. In each of
these cases the furnace with its flues are external of the steam boiler, but in
Figure 9, which is part of a longitudinal section, and Figure 10, which is a
transverse section, a steam boiler is shown with its furnace and flue interior
of the boiler, in which case the flue is not so arranged as to pass back and
under the bridge, as before described. In this arrangement of furnace,
according to my Invention, I still contract the bridge, or rather the passage
over it into the flue, and air is similarly introduced by passages in like
manner to what are shewn in the previous Figures and described in respect
thereto. The Drawings in each case show the direction and arrangement of the
air passages e, e, but they may be varied, provided they are introduced over the
bridge, as above explained, and so as to cause the air to tend to cross over in-
opposite directions, as above explained. And in like manner to Figures 9 and
10 may marine and other steam boilers, having internal fire-places, be con-
structed according to my Invention. Figure 11 shows an external view.
Figures 12 and 13 two sections taken at right angles to each other. Figures"
14 and 15 show two horizontal sections, and Figure 16 a plan of a boiler or
pan suitable for heating or evaporating fluids, in which the flue does not pass
under the bridge, but it passes from the furnace and then passes round the
boiler, and in most cases it will not be necessary to reduce the opening
through the bridge. In this arrangement of boiler the air is introduced just
above the bridge by airways e, e, in like manner to that above described in
respect to the other furnaces. I would remark that other constructions
of furnaces, such as those employed for kilns and other purposes, may be
similarly constructed to the one last described.
Having thus described the nature of my Invention and the manner in
which the same is to be performed, I would have it understood that I do not
confine myself to the details shown and described, so long as the peculiarity.
of my Invention be retained. But what I claim is, first, the so constructing
furnaces for steam and other boilers that the flues thereof shall pass under the
bridges, and the bridges be so arranged as to be contracted, and have air
introduced above them at the opposite sides, as described in respect to
Figures 1, 2, 3, 4, 5, 6, 7, and 8. Secondly, I claim the so constructing steam
and other boiler furnaces that air may be introduced at the opposite sides of
and over the bridges, the openings over which into the flues are contracted

page_text: in respect to the fire bars, as described in respect to Figures 9 and 10. And,
thirdly, I claim the so constructing boiler and other furnaces that air is
introduced on either side, just over the bridge, so as to tend to cross over from
side to side, as shown and described in respect to Figures 11, 12, 13, 14, 15,
and 16.
In witness whereof, I, the said William Spiby, have hereunto set my
hand and seal, this Thirtieth day of September, One thousand eight
hundred and forty-six.