CERTAIN IMPROVEMENTS IN FURNACES, AND IN THE FLUES AND TILES USED IN THE CONSTRUC- TION THEREOF
Year: 1847

page_text: GRUNDY'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
GBUNDY, of Manchester, in the County of Lancaster, Manager, send. greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Eighth day of February, in the tenth year of Her reign, and in the
year of our Lord One thousand eight hundred and forty-seven, did, for Herself,
Her heirs and successors, give and grant unto me, the said George Grundy, Her
especial licence, full power, sole privilege and authority, that I, the said George
Grundy, my exors, adñiors, and assigns, and such others as I, the said George
Grundy, my exors, adñiors, or assigns, shall 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 lawfully might make, use, exercise, and vend, within England,
Wales, and the Town of Berwick upon Tweed, my Invention of "CERTAIN
IMPROVEMENTS IN FURNACES, AND IN THE FLUES AND TILES USED IN THE CONSTRUC-
TION THEREOF;" in which said Letters Patent is contained a proviso that I, the
said George Grundy, should cause a particular description of the nature of my
said Invention, and in what manner the same is to be performed, to be enrolled
in Her 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.
NOW KNOW YE, that in compliance with the said proviso, I, the said
George Grundy, do hereby declare the nature of my Invention to consist in a
novel arrangement of the flues and other parts of a furnace by which the heat
is more efficiently applied to the object for which the furnace is used, and also

page_text: in an improved form of tile used in the construction of such furnace; and the
manner in which the same are to be performed and carried into effect will be
seen by reference to annexed Drawing, and the following description. The
scale to which the annexed Drawing is inade is marked thereon, and the same
letter or figure of reference indicates the same part throughout all the Figures.
The annexed Drawing refers to a furnace and four cylindrical fire clay or
tile cylinders or tubes for generating coal gas for the purpose of illumination
to which my improvements are applied. Figure 1 is an end view; Figure 2,
a longitudinal section; Figure 3, a transverse section taken at the line A, B,
Figure 2; Figure 4, a transverse section taken at the line C, D, Figure 2;
and Figures 5, 6, and 7, are horizontal sections taken at the various lines
EF, G H, and I K, Figure 3, as explained on the Drawing. The fuel in
the furnace (which in this case is coal tar, but other fuel may be used)
is placed at L, which is a space reaching from one end to the other of
the furnace; and 1, 1, are two parallel flues for supplying air which arrives
at the fire through a series of openings, as seen at Figures 2, 3, and 4.
Both the air flues and the fuel compartment are provided with doors at each
. end, as seen at Figure 1, by which the supply of air can be regulated. The
oven in which the tile or fire clay tubes M, M, M, M, are placed is of the
ordinary shape, and the course of the flame and heat generated below is indi-
cated by the various small arrows seen in the sections at Figures 5, 6, and 7,
which sections being taken at different levels shew the continuous traverse of
the heat from end to end, or from end to centre of the cylindrical tubes
M, M, M, M, till it ultimately escapes at the aperture N on the crown of the
oven. These tubes are formed either of tile or fire clay alone, or I sometimes
introduce metallic hoops, which are imbedded in the clay to give them strength.
The tubes are open at both ends, as seen at Figures 3 and 4, and each tube
consists of separate lengths or pieces, which are jointed together as seen at O,
Figures 2 and 5, the joints being made good with fire clay, and supported by
the fire clay tiles P, P, P, P, see Figures 3 and 4; and the form and con-
struction of this joint is seen by the dotted lines at Figure 5. It will be
remarked that the tubes are provided with exit pipes for the gas at each end;
and when I find any accumulation of coal tar within the tube, I remove it by
partially opening one end, and applying an extra pipe at the opposite end, which
pipe then acts as a flue, and the draft of air through the heated tube com-
pletely removes the carbonaceous deposits from the interior of the tile or fire
clay tube. I would here remark, that the number of joints in each tube must
depend on its length; but that the length may be greatly increased beyond the
length of ordinary retorts on account of the facility of working at both ends of

page_text: the tube, which I consider an important feature in this part of my improve-
ments.
Having described the manner of applying my improvements to a furnace
for generating gas, the application of such improvements may be readily
applied to furnaces for other purposes; and although various parts of the
furnace described are well known and in common use, and to which I make no
claim of Invention, yet I do claim as my Invention, the general arrangement
of the furnace and flues as set forth and described, which consists in a con-
tinuous fire-place from one end to the other, supplied by air from parallel air
flues, and the heat conducted from end to end, or from end to centre repeatedly,
as described, together with the peculiar form and construction of tile or fire
clay tubes, and the tiles for forming the joints as described, all which being to
the best of my knowledge and belief new and never before practised in that
part of Her Majesty's Dominion called England, I deliver this as my true
and faithful Specification of the same.
In witness whereof, I, the said George Grundy, have hereunto set my hand
and seal, this Fourth day of August, in the year of our Lord One
thousand eight hundred and forty-seven.
0 Signed, sealed, and delivered by the
within-named George Grundy
(having been first duly stamped)
in the urocence of
GEORGE (L.B.) GRUNDY.