AN IMPROVED STEAM BOILER AND FURNACE FOR CONSUMING PADDY HUSKS AND OTHER VEGETABLE REFUSE
Year: 1880

page_text: LETTERS PATENT to James Henderson, of Fenchurch Avenue, in the City of
London, for an Invention of "AN IMPROVED STEAM BOILER AND FURNACE
FOR CONSUMING PADDY HUSKS AND OTHER VEGETABLE REFUSE."
A com-
munication from abroad by John Rankine Russell, Engineer, of Rangoon,
British Burmah.
PROVISIONAL SPECIFICATION left by the said James Henderson at the
Office of the Commissioners of Patents on the 23rd September 1880.
" AN
JAMES HENDERSON, of Fenchurch Avenue, in the City of London.
IMPROVED STEAM BOILER AND FURNACE FOR CONSUMING PADDY HUSKS AND
OTHER VEGETABLE REFUSE." A communication from abroad by John Rankine
Russell, Engineer, of Rangoon, British Burmah.
This Invention relates to a now or improved arrangement of steam boiler and
furnace for consuming paddy husks and other vegetable refuse, by which the
following advantages are obtained, namely:-
Getting up steam in a remarkably short time, simplicity of feeding the furnace
with husks, and the casy method the ashes are cleared away, entailing little or no
manual labor and material in erecting.
Taking up little space, and easy of access both internally and externally for
repairs, and with slight alteration and little expense and can be converted into a
boiler and furnace to be fired with ordinary coal or other fuel in the usual manner.
For this purpose a cylindrical upright boiler is fitted on the top with a hopper to
contain the husks, and in which a screw is worked by suitable gearing, which
regulates the feed into the furnace into which the husks fall and are consumed.
There are three or other number of flue tubes from the furnace into the casing
around the boiler, and a flue to the chimney.
The boiler rests on a base plate, which is fitted with fire bars with air spaces
between converging towards the bottom, being open in the centre to an escape pipe
for the ashes, which pipe is fitted with a worm driven by machinery to take away
the ashes.
The water spaces of the boiler are surrounded by an outer casing.
According to the size of the boiler it can be fitted with one or more furnaces
worked substantially as above set forth.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Henderson in the Great Seal Patent Office on the 23rd March
1881.
"AN
JAMES HENDERSON, of Fenchurch Avenue, in the City of London.
IMPROVED STEAM BOILER AND FURNACE FOR CONSUMING PADDY HUSKS AND
OTHER VEGETABLE REFUSE." A communication from abroad by John Rankino
Russell, Engineer, of Rangoon, British Burmah.
This Invention relates to a new or improved arrangement of steam boiler and
furnace for consuming paddy husks, saw dust, and other vegetable refuso, by which
the following advantages are obtained, namely:
--
Getting up steam in a remarkably short time, simplicity of feeding the furnace
with paddy or other husks, saw dust, or other vegetable refuse, and the easy
method the ashes are cleared away, the whole entailing but little manual labor and
material in erecting.
The boiler and apparatus occupies very little space, is easy of access both 1
_internally and externally for repairs, and with slight alteration and little expense
can be converted into a boiler and furnace to be fired with ordinary coal or other
fuel in the usual manner if required.
And-in-order-that the Invention may be clearly understood and readily carried
--into-practice. I will proceed to describe the Drawings-hereto annexed.
Figure 1 is an elevation partly in section, and Figure 2 is a horizontal section
taken through the line A, A, of Figure 1, of a boiler and furnace arranged and
constructed in accordance with this Invention.
The cylindrical upright boiler, as represented, is fitted on the top with a
hopper A to contain the husks, and in which a screw or worm A' is actuated by
suitable gearing, which regulates the feed into the furnace H into which the husks
fall and are consumed; C are three or other suitable number of flue tubes from the
furnace into the casing D around the boiler to increase the heating surface, and
a flue E leading to the chimney, whence it escapes into the air. The casing D
may be constructed of iron or brick.
The boiler rests on a baso plato or frame F (which may be of iron or brick),
being fitted with fire bars G arranged in a circlo with air spaces between
converging towards the bottom, being open in the centre to an escape pipe I for the
ashes, which pipo communicates with the tube I', which is fitted with a worm J
actuated by suitable machinery to take away the ashes.
This boiler may be supplied with ordinary fuel in the usual manner through a
firo door (indicated in dotted lines), fire bars being placed in a suitable position for
this purpose. In this case the flues or opening at C are closed, the heated gases
and products of combustion being allowed to pass out through the opening at A.
Horizontal tubes may be arranged in the internal flue or furnace above the fire
grate, to promote the circulation of the water in the boiler, as well as to give
stiffness to the internal fluo or furnace.
Suitable safety and stop valves, feed water apparatus, water gauge, and blow off
cock (not shown in the Drawings) may be readily applied to this boiler by a
competent mechanic.
In working this boiler (shown in the Drawings) paddy husk, saw dust, or other
vegetable matter, is first supplied to the hopper A; a fire is then lighted in the
furnace H with wood, coal, or other fuel, which when sufficiently ignited, the screw
or worm B is started to revolve at sufficient speed to keep up the supply of fuel

page_text: from the hopper A through the pipe Q, after which the worm J is made to revolvo
at sufficient speed to carry away the ashes. Both the worms or screws B and J
can be driven by power supplied from a small engine, or by any other means most
convenient.
Another mode of working this boiler and furnace is having a shut slide or
valve in the bottom of the hopper A, and after kindling a fire in the furnace H,
either with wood, coals, or other fuel, to open the shut slide or valve in A, and
allowing it to fall by gravitation into H at a sufficient speed or quantity required.
The ashes or refuse can also be removed by allowing them to fall through the
pipe I into an ash pit or other receptacle, keeping sufficient ashes or refuse on
mouth of I to prevent the fuel from falling too rapidly through the furnace H,
also to prevent too large a volume of cold air passing into the furnace H; the latter
methods can be adopted where power is not convenient to be had, or during the
time that steam is being raised to drive the power which is to be used for the
feeding and clearing gear.
B' in the half section shows the water spaces of the boiler surrounded by the
outer casing D.
According to the size of the boiler, it can be fitted with one or more furnaces,
worked substantially in the manner as above set forth.
Having thus described the nature of the said Invention communicated to mo
from abroad by the said John Rankine Russell, and the manner in which the same
may be advantageously carried into practice, I would remark that no claim is made
to any of the parts separately, which are well known and in common use, but what
I claim under the above in part recited Letters Patent is,-
The improved arrangement and construction of steam boilers and furnaces for
consuming paddy husks, saw dust, and other vegetable refuso, combined with a
feeding hopper, such as A, for the fuel, and an escape passage, such as I, I', and
screw J, or its equivalent, for discharging the ashes, substantially as hereinbefore
described and represented in the Drawings hereto annexed.
In witness whereof, I, the said James Henderson, have hereunto set my hand
and seal, this Seventeenth day of March, in the year of our Lord One
thousand eight hundred and eighty one.
TARG
HANDANGAN