IMPROVEMENTS IN THE CONSTRUCTION. OF FURNACES AND BOILERS.
Year: 1855

page_text: LETTERS PATENT to Joseph Jessop, of Lascelles Hall, near Huddersfield,.
in the County of York, Manufacturing Chemist, for the Invention of:
IMPROVEMENTS IN THE CONSTRUCTION. OF FURNACES AND BOILERS.'
Sealed the 2nd May 1856, and dated the 6th November 1855.
PROVISIONAL SPECIFICATION left by the said Joseph Jessop at the
Office of the Commissioners of Patents, with his Petition, on the 6th
November 1855.
I, JOSEPH JESSOP, of Lascelles Hall, near Huddersfield, in the County of
York, Manufacturing; Chemist, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF FURNACES AND BOILERS."
My Invention consists, firstly, in the employment of a number or set of
discs or wheels fixed at suitable distances from each other, on a shaft capable
of rotating, and applied to the back part of furnaces betwixt the grate bars
and the bridge, for the purpose of receiving the clinkers, &c. when pushed from
the grate bars, and carrying the same forwards at intervals or otherwise to the
ash-pit underneath; also in the use of a diaphram to separate the aforesaid
dises and ash-pit from the ordinary grate bars and ash-pit, with doors, dampers,
or valves to regulate the admission of air thereto.
Secondly, in constructing boilers with or applying thereto a water space.
projection over the back parts or ends of the grate bars, forming an inverted

page_text: bridge to the furnace in front of the ordinary bridge and immediately above
the before-mentioned discs, the purpose of which is to deflect the smoke from
the upper part of the furnace down into close contact with the partially
consumed fuel and clinkers at the back part of the furnace and on the discs,
whereby the smoke will be consumed, whilst the heat arising from the clinkers
and the combustion of smoke will greatly assist in generating steam in the
aforesaid water space or bridge, whereby a saving of fuel will be effected.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Jessop in the Great Seal Patent Office on the
5th May 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
JESSOP, of Lascelles Hall, near Huddersfield, in the County of York, Manu-
facturing Chemist, send greeting.>
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Royal
Letters Patent, bearing date the Sixth day of November, in the year of our
Lord One thousand eight hundred and fifty-five, in the nineteenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Joseph Jessop, Her special licence that I, the said Joseph Jessop,
my executors, administrators, and assigns, or such others as I, the said Joseph
Jessop, 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
THE CONSTRUCTION OF FURNACES AND BOILERS," upon the condition (amongst
others) that I, the said Joseph Jessop, by an instrument in writing under
my hand and seal, should-particularly 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 Royal
Letters Patent
!....
NOW KNOW YE, 'that I, the said Joseph Jessop, do hereby declare
the nature of the 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 (that is to say):-

page_text: My Invention consists, firstly, in the employment of a number or set of
discs or wheels fixed at suitable distances from each other on a shaft capable
of rotating, and applied to the back part of furnaces betwixt the grate bars and
the bridge, for the purpose of receiving the clinkers, &c. when pushed from the
grate bars, and carrying the same forward at intervals to the ash-pit under-
neath; also in the use of a diaphram to separate the aforesaid dises and ash-
pit from the ordinary grate bars and ash-pit, with doors, dampers; or valves
to regulate the admission of air thereto.
Secondly, in constructing boilers with or applying thereto a water space
projection over the back part or ends of the grate bars, forming an inverted
bridge to the furnace in front of the ordinary bridge and immediately above
the before-mentioned discs, the purpose, of which is to deflect the smoke from
the upper part of the furnace down into close contact with the partially
consumed fuel and clinkers at the back part of the furnace and on the discs,
whereby the smoke will be consumed, whilst the heat arising from the clinkers
and the combustion of smoke will greatly assist in generating steam in the
aforesaid water space or bridge, whereby a saving of fuel will be effected.
This my Invention will be readily understood by reference to the accom-
panying Sheet of Drawings. Fig. 1 is a longitudinal and vertical section of
the front part or fire end of a boiler and furnace constructed according to my
Invention. a represents the ordinary grate bars; b, the discs or wheels; c, the
diaphram or partition, with doors d; the dotted lines shew the doors open. e, a
shaft; and e', wheels (or pullies) for turning the discs means of the worm
and wheel f, motion being given thereto by hand or power; h is part of a
boiler; and i, the water space projection; j, the ordinary bridge, which is
so constructed as to leave a space clear of the discs for the clinkers, &c. to pass
through. Fig. 2 is a front elevation of a number or series of discs and worm
wheel on a shaft; Fig. 3 is another form of disc or wheel; and Fig. 4,
another modification of part of the furnace on the principle of my Invention,
for holding and readily removing the clinkers at the back.
It will be seen that the water space projection will deflect the smoke and
unconsumed products of combustion towards and into close contact with the
bright fire and clinkers at the back end of the grate bars and on the discs,
whereby I obtain an increased heating surface and a consumption (or preven-
tion of the smoke), and by means of the shaft and gearing I can remove the
clinkers, &c. without opening the furnace doors, and by opening the doors in
the diaphram I admit air betwixt the two bridges, which by passing through
or between the discs becomes partially heated, so that I admit no cold air to
the furnace except in the ordinary way through the grate bars.

page_text: In constructing the furnaces of dye pans or other vessels for heating or
boiling liquids, I employ fire brick for deflecting the smoke instead of the,
water space projection. I am aware that fire brick hanging bridges. have,
heen proposed to be used or applied to steam boilers or steam generators;
I do not therefore claim such application separately as of my Invention..
Having thus fully described and ascertained the nature and particulars of
my Invention, and the manner of carrying the same into practical effect, I,
desire it to be understood that I do not claim the use of a, diaphram with
doors or valves separately; but I claim the general construction of furnaces
and boilers. as herein described, and illustrated in the accompanying Sheet of
Drawings.
In witness whereof, I, the said Joseph Jessop, have hereunto set my
hand and seal, this Second day of May, One thousand eight hundred
and fifty-six
JOSEPH JESSOP. (L.S.).
Signed, sealed, and delivered by the within-named
Joseph Jessop, in the presence of
WM TASKER, Halifax.