IMPROVEMENTS IN THE MODE OR METHOD OF OBTAINING HEAT FOR HEATING STEAM BOILERS AND FOR OTHER PURPOSES, AND IN THE APPARATUS USED THEREFOR.”
Year: 1873

page_text: LETTERS PATENT to Nathaniel Lloyd, of the City of Manchester, in
the County of Lancaster, for the Invention of "IMPROVEMENTS IN THE
MODE OR METHOD OF OBTAINING HEAT FOR HEATING STEAM BOILERS AND FOR
OTHER PURPOSES, AND IN THE APPARATUS USED THEREFOR.”
PROVİSİONAL SPECIFICATION left by the said Nathaniel Lloyd at the
Office of the Commissioners of Patents, with his Petition, on the
24th December 1873.
I, NATHANIEL LLOYD, of the City of Manchester, in the County of
Lancaster, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE MODE OR METHOD OF OBTAINING HEAT FOR HEATING
STEAM BOILERS AND FOR OTHER PURPOSES, AND IN THE APPARATUS USED THEREFOR,”,
to be as follows:-
I take the ordinary one, two, or more flued boiler but dispense with
the furnaces and fire-bars hitherto placed in the flues, and place at the
front a tubular boiler and furnace, the tube or tubes communicating
with the water space in the back boiler and the furnace with the flues.

page_text: The case of the front boiler and furnace is lined with tiles of fire-clay
or any other suitable material, and is cither stationery on brickwork or
made to revolve in bearings by gearing, and the coal which is in a small
or comparatively pulverized state is fed at the front from a hopper and
the ashes pass off at the back.
The water tubes are of any desired form and when water is supplied it
circulates through the tubes and water space of the back boiler, the
water being fed cither at the back boiler or at the front of the tubes.
In some cases I make between the furnace and flucs a chamber in
which the products of combustion are mixed with air in regulated
quantities so as to ensure perfect combustion of the gases and smoke
arising from the fuel. By these methods of heating water and generating
steam I am enabled to increase the number of tubes and bring them to
the front end instead of being only in a portion of the fluc as at present,
and though I have only named coal in the foregoing description as the
material used for obtaining heat, oil or other substances or materials
may be used.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Nathaniel Lloyd in the Great Scal Patent Office
on the 24th June 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, NATHANIEL
LLOYD, of the City of Manchester, in the County of Lancaster, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of December, in the
year of our Lord One thousand cight hundred and seventy-three, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Nathaniel Lloyd, Her special
license, that I, the said Nathaniel Lloyd, my executors, administrators,
and assigns, or such others as I, the said Nathaniel Lloyd, 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 "IMPROVE

page_text: MENTS IN THE MODE OR METHOD OF OBTAINING HEAT FOR HEATING STEAM BOILERS
AND FOR OTHER PURPOSES, AND IN THE APPARATUS USED THEREFOR," upon the
condition (amongst others) that I, the said Nathaniel Lloyd, my"
executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describo
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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Nathaniel Lloyd, do hereby declare
the nature of my said Invention, and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the
following statement, reference being had to the figures on the accom-
panying Sheet of Drawings, and to the letters of reference marked
thereon (that is to say):-
I take the ordinary one, two, or more flued boiler but dispense with
the furnaces and fire-bars hitherto placed in the flucs, and employ at
the front of cach flue a cylindrical revolving furnace supported on wheels
or rollers on a wheeled carriage.
The furnace is formed of a strong iron case lined with fire-bricks, fire-
clay, or other refractory material, and has at the front a door or cover
having perforations for the supply of air, and also a hole for the entrance
of the spout of a hopper and for giving revolving motion to the furnace.
I fix to the case a worm or toothed wheel gearing into a worm or pinion
caused to revolve by a strap and pulley.
On the accompanying Sheet of Drawings Figs. 1 and 2 are side and
end views of part of an ordinary one flued boiler provided with one of
my improved revolving furnaces.
a, represents part of the boiler; b, the body of the furnace; c, the
door or cover; d, the wheels or rollers carrying the furnace; e, the
carriage; f, the hopper; g, the worm or toothed wheel; h, the worm or
pinion fixed to the shaft i; and k, l, the pulley and strap for working it.
The hopper is charged with coal in a small or comparatively pulverized
state, the supply to the furnace being regulated by a slide or damper m,
and when the furnace having in it ignited fuel is wheeled up to the
boiler and caused to revolve the particles of coal are continually agitated
and rapidly consumed, thereby enabling a large volume of intense heat

page_text: to pass to the flue and boiler and quickly generate steam from the
water, and when there is an accumulation of ashes the carriage and
furnace are pulled back by a handle and the ashes removed at the back
or by any other convenient means.
When there are two or more flues a corresponding number of furnaces 5
are carried on one frame or carriage, the furnaces being turned by gearing
from one main shaft.
In another arrangement I employ at the front of the furnace a
stationary cover and hopper combined, the back of the cover being a
short distance from the front of the furnace, and on this cover there are
nozzles or short pipes communicating with another pipe connected to
a fan or blower.
The cover and hopper may be either made of metal or of fire-brick,
fire-clay, or other suitable material, and several furnaces may have air
blown into them from one fan. These furnaces are used not only in 1
connection with plain flues, but also with those in which there are water
tubes, and though I have only named coal in the foregoing description
as the material for obtaining heat, oil, or other materials or substances
may be used, and these furnaces may be so modified that they may be
nsed for other purposes than the generation of steam.
Having now described the nature and particulars of my said Inven-
tion, I desire it to be understood that for obtaining heat for heating
steam boilers and for other purposes, I claim the revolving furnaces and
apparatus in connection with them as herein described and illustrated
on the accompanying Sheet of Drawings.
In witness whereof, I, the said Nathaniel Lloyd, have hereunto set
my hand and seal, this Twenty-second day of June, in the year
of our Lord One thousand eight hundred and seventy-four.
2
2
Witness,
G. Septimus Hugnes,
Patent Agent,
Manchester.
N. LLOYD. (L.S.)