IMPROVEMENTS IN STEAM ENGINE BOILER AND OTHER FURNACES
Year: 1857

page_text: LETTERS PATENT to Henry Glaysher, of the Isle of Wight, in the County
of Hampshire, Engineer, for the Invention of "IMPROVEMENTS IN STEAM
ENGINE BOILER AND OTHER FURNACES."
Sealed the 8th September 1857, and dated the 16th March 1857.
PROVISIONAL SPECIFICATION left by the said Henry Glaysher at the
Office of the Commissioners of Patents, with his Petition, on the 16th
March 1857.
I, HENRY GLAYSHER, of the Isle of Wight, in the County of Hampshire,
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN STEAM ENGINE BOILER AND OTHER FURNACES," to be as follows:-
My said improvements relate to peculiar mechanical arrangements in the
construction of steam engine boiler and other furnaces for the prevention of
smoke.
In furnaces constructed according to my said Invention I provide a front
and back set of fire bars, with an intermediate space, having a valve, operated
by a suitable lever to close the same; or the valve may be raised to act as a
damper, causing the current of the draught from the first fire to descend and
take a course upwards through the bars and fuel of the back grate, and thence
over the fire bridge. Within the ash-pit I arrange a moveable vertical screen
or damper, to push backwards or forwards to regulate the admission of air to
the under surface of the grate bars.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Glaysher in the Great Seal Patent Office on the
14th September 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
GLAYSHER, of the Isle of Wight, in the County of Hampshire, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of March, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Henry Glaysher, Her special licence that I, the said Henry Glaysher,
my executors, administrators, and assigns, or such others as I, the said Henry
Glaysher, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN STEAM ENGINE
BOILER AND OTHER FURNACES," upon the condition (amongst others) that I, the
said Henry Glaysher, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should particu-
larly describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Henry Glaysher, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
My said improvements relate to peculiar mechanical arrangements in the
construction of steam engine boiler furnaces and other furnaces, for the pre-
vention of smoke from the fuel consumed therein. And for the better
understanding of the same I will now proceed to give the details thereof,
reference being had to the Drawing hereunto annexed.
DESCRIPTION OF THE DRAWING.
Figure 1 is a longitudinal sectional elevation of a Cornish boiler having
my improvements applied to the furnace. A is the boiler; B, the front set
of fire bars; and C, the back bars; D, the valve; and D', the valve box,

page_text: which being open admits the smoke of each fresh charge of fuel by a down-
ward draught to pass thence upwards through the grate C, and when the
valve is closed the whole forms one furnace; E is a lever for raising or
closing the valve D; F, a screen or damper, moved by the rod F cither
backwards or forwards to regulate the admission of air through the ash-pit;
and G is the ordinary fire bridge.
It will thus be observed, that in furnaces constructed according to my said
Invention I provide a front and a back set of fire bars, with an intermediate
space, having a valve operated by a suitable lever to open or close the same,
and when raised it acts as a damper, causing the current of the draught from
the front fire-place to descend and take a course upwards through the bars
and incandescent coked fuel of the back grate, and thence over the fire
bridge. Within the ash-pit I arrange a moveable vertical screen or damper,
to act on the admission of air to the under surface of the grate bars.
Having thus fully described one mode of carrying out my said Invention, I
would here remark, that as the same must be modified in certain respects to
accommodate different classes of furnaces, I do not limit myself to the precise
details herein given, so long as the principle of my said Invention is main-
tained, neither do I restrict myself to the dimensions or materials of the
several parts; and I do declare that what I claim as my Invention is, namely,
the peculiar mechanical arrangements and their application to furnaces for
preventing the emission of smoke during the combustion of fuel, as described.
In witness whereof, I, the said Henry Glaysher, have hereunto set my
hand and seal, this Twelfth day of September, in the year of our Lord
1837
HENRY GLAYSHER. (L.S.)