IMPROVEMENTS IN CAMION OF LABAD AND CORDED ARES
Year: 1855

page_text: LETTERS PATENT to Alfred Jenkin, of Zell, on the Moselle, in the King-
dom of Prussia, Engineer, for the Invention of "IMPROVEMENTS IN
CAMION OF LABAD AND CORDED ARES"
Sealed the 29th June 1855, and dated the 23rd April 1855.
PROVISIONAL SPECIFICATION left by the said Alfred Jenkin at the
Office of the Commissioners of Patents, with his Petition, on the 23rd
April 1855.
I, ALFRED JENKIN, of Zell, on the Moselle, in the Kingdom of Prussia,
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN FURNACES FOR THE REDUCTION AND CALCINATION OF LEAD AND COPPER
ORES" to be as follows:-
This Invention relates to a peculiar construction and arrangement of double
reverberatory furnaces employed in the reduction and calcination of lead and
copper ores, whereby a greater economy of fuel is effected than has hitherto
been accomplished in furnaces of this class. The principle feature in this
improved furnace is, that one ordinary fire answers the double purpose of
reducing and calcining the ore. The fire is contained in an ordinary fire-
place, situated at one end of the double furnace.
The heat and flame from this fire passes through a lateral opening or flue,
into the reducing or flowing furnace, and after passing over the surface of
the ore contained therein, it enters by another opening or openings into the

page_text: calcining furnace, which is placed on the same level, or nearly so, with the
flowing furnace. From the calcining furnace the heat passes off by a suitable
flue or flues to the chimney. In the passage or passages which conduct from
the flowing furnace to the calcining furnace there are placed suitable doors or
dampers, which are so arranged, that by opening or closing certain of these
doors or dampers the heat and flame may either be directed into the calcining
furnace, or be entirely shut off from such furnace and be directed into a waste
flue, which passes downwards to an underground flue communicating with the
chimney. An air or ventilating space is left between the calcining and flowing
furnaces, for the purpose of preventing the bed of the latter furnace from
becoming overheated, when the flame and heat is diverted down the waste or
escape flue or flues, which flue or flues are formed in that side of the venti-
lating air space farthest from the flowing-furnace, so that whether the calcining
furnace be in operation or not, the bed of the flowing furnace will always remain
at about the same temperature..
SPECIFICATION. in pursuance of the conditions of the Letters Patent, filed
by the said Alfred Jenkin in the Great Seal Patent Office on the 23rd
October 1855.
TO ALL TO. WHOM THESE PRESENTS SHALL COME, I, ALFRED
JENKIN, of Zell, on the Moselle, in the Kingdom of Prussia, Engincer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-third day of April, in the year of our Lord
One thousand eight hundred and fifty-five, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Alfred Jenkin, Her special license that I, the said Alfred Jenkin, my
executors, administrators, and assigns, or such others as I, the said Alfred
Jenkin, my executors, administrators, or 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 FURNACES FOR
THE REDUCTION AND CALCINATION OP LEAD AND COPPER ORES," upon the conditiou.
(amongst others) that I, the said Alfred Jenkin, by an instrument in writing
under 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

page_text: 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 Alfred Jenkin, do hereby declare the
nature of my said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
reference being had to the accompanying Drawings, and to the letters and
figures marked thereon, that is to say:-
This Invention relates to a peculiar construction and arrangement of double
reverberatory furnaces employed in the reduction and calcination of lead and
copper ores, whereby a greater economy of fuel is effected than has hitherto
been accomplished in furnaces of this class. The principal feature in the
improved furnace is, that one ordinary fire serves the double purpose of
reducing and calcining the ore. The fire is contained in an ordinary fire-
place, situated at one end of the double furnace. The heat and flame
from this fire pass through a lateral opening or flue into the reducing or
flowing furnace, and after passing over the surface of the ore contained therein
enter by another opening or openings into the calcining furnace, which is
placed upon the same level, or nearly so, with the flowing furnace; the heat
passes off by a suitable flue or flues to the chimney, In the passage or
passages which conduct from the flowing furnace to the calcining furnace there
are placed suitable doors or dampers, which are so arranged, that by opening
or closing certain of these doors or dampers, the heat and flame may either be
directed into the calcining furnace, or be entirely shut off from such furnace,
and be directed into a waste flue, which passes downwards to an underground
flue communicating with the chimney. An air or ventilating passage is left
between the calcining and flowing furnaces, for the purpose of preventing the
bed of the latter furnace froin becoming overheated, when the flame and heat
are diverted down the waste or escape pipe or flues, which flue or flues are
formed in that side of the ventilating air space farthest from the flowing
furnace, so that whether the calcining furnace be in operation or not, the
flowing furnace will always remain at about the same temperature.
And in order that my said Invention may be fully understood, I shall now
proceed more particularly to describe the same, and for that purpose I shall
refer to the several Figures on the Sheet of Drawings hereto annexed, the
same letters of reference indicating corresponding parts throughout all the
Figures.
Figure 1 in the annexed Drawings represents an exterior elevation of my
improved arrangement of reducing and calcining furnace; Figure 2 is a longi-
tudinal transverse section; and Figure 3, an horizontal section of the same.

page_text: A is the ordinary fire-place, the heat and flame from which pass through the
lateral opening or flue B into the flowing furnace C, and after traversing over
the surface of the ore contained therein enter by the passages D into the
calcining furnace E, which is upon the same level with the floor of the flowing
furnace. Fare passages leading off to the main draught flue or chimney.
When it is required to shut off the heat and flame from the calcining furnaco
the two dampers G are closed, and the pair of dampers H are elevated, thereby
shutting off the flow from the passages D, and diverting it into the descending
or waste flue I, which conducts it underground to the main flue. An air or
ventilating space J is left between the flowing and calcining furnace, in order
to prevent the latter from becoming overheated. The ore to be calcined is
fed into the calcining furnace by the hopper K, and is removed when calcined
through the aperture L in the bottom of the furnace. The flowing or reducing
furnace is also provided with a similar hopper M, to supply the calcined ore to
the flowing or reducing furnace. The small chimney N serves to carry off
any dust or ashes arising from the fire when fresh fuel is supplied, or when it
is otherwise agitated.
Having now described and particularly ascertained the nature of my said
Invention, and the manner in which the same is or may be used or carried
into effect, I would observe, in conclusion, that I do not confine or restrict
myself to the precise details or arrangements which I have had occasion to
describe or refer to, as many variations may be made therefrom without
deviating from the principles or main features of my said Invention; but what
I consider to be novel and original, and therefore claim as the Invention
secured to me by the herein-before in part recited Letters Patent, is, the
general construction and arrangement of combined calcining and flowing
furnace, as exhibited in the annexed Drawings, and above more particularly
described and set forth.
In witness whereof, I, the said Alfred Jenkin, have hereunto set my
hand and seal, the Twentieth day of October, One thousand eight
hundred and fifty-five.
Signed in the presence of
GEORGE HIBBERT,
Eyam, n' Bakewell, Derbyshire.
ALFRED JENKIN. (L.S.)