INPROVEMENTS IN KILNS OR OVENS
Year: 1875

page_text: LETTERS PATENT to George Tomlinson Bousfield, of Sutton, in the
County of Surrey, for the Invention of "INPROVEMENTS IN KILNS OR
OVENS."A communication from abroad by the Société Anonyme
COMPLETE SPECIFICATION filed by the said George Tomunson
Bousfield at the Office of the Commissioners of Patents, with his
Petition and Declaration, on the 5th June 1875, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
TOMLINSON BOUSFIELD, of Sutton, in the County of Surrey, send
greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS IN
KILNS OR OVENS," and have petitioned Her Majesty to grant unto me,
my executors, administrators, and assigns, Her Royal Letters Patent
for the same, and have made solemn Declaration that it has been

page_text: communicated to me from abroad by the Société Anonyme du Cuivre
François, of Paris, in the Republic of France.
NOW KNOW YE, that I, the said George Tomlinson Bousfield, do
hereby declare that the following Complete Specification, under my
hand and seal, fully describes and ascertains the nature of the said
Invention, and in what manner the same is to be performed, in and by
the following statement :—
This Invention has for its object improvements in kilns or ovens.
This kiln or oven consists of a number of separate chambers arranged in
a circle round a single central furnace, which beats them either
simultaneously or separately at will; an arrangement which allows the
various compartments to be kept at different temperatures which are
regulated and maintained as required at each phase of the process. The
form of the chambers or separate ovens should be proportioned to the
work to be performed, and may vary without departing from the
principle of the Invention, according to the purpose for which the
circular kiln with the central furnace is to be eninloved.

page_text: varied, reducing it nearly to nothing at the moment when the sulphur
of the minerals inflames, and then gradually augmenting it when as the
sulphur of the mineral is exhausted and its combustion diminishes in
activity, the temperature tends to drop and finally at the end of the
operation giving it a heat more or less intense, and more or less
prolonged to decompose one or more of the sulphates that have been
varied, reducing it nearly to nothing at the moment when the sulphur
of the minerals inflames, and then gradually augmenting it when as the
sulphur of the mineral is exhausted and its combustion diminishes in
activity, the temperature tends to drop and finally at the end of the
operation giving it a heat more or less intense, and more or less
prolonged to decompose one or more of the sulphates that have been
formed.
The sulphurous acid disengaged during the work is partly collected in
a special gallery, and is led from thence to apparatus suitable for its
transformation into sulphuric acid.
DESCRIPTION OF THE DRAWINGS.
·S, S, S¹, S¹, S", S", are circular series of eight soles each, three series
S, S¹, S¹¹, being placed one above the other, and making in all 24 soles to
each kiln. P, P, working holes; F, single central furnace situated below.
the soles S; G gallery for working the furnace F₁; T, modification drawn
in bluc, showing the position of the furnace in case it is thought
desirable to raise the grate. By means of the fire-clay hopper the fuel is
fed in at the top and the furnace will be at F¹; R, R, R, fire-clay
registers worked from without by means of levers working in grooves.
These registers serve to regulate the heat admitted to each of the soles
during work, or even to isolate them completely during the time occupied
in charging and discharging, although all the others are in direct
communication with the fire. L, L, L, flues for carrying off the
products of combustion; M, M, collecting flues in direct communication
with the flues L, L, L; K, K, K, vertical cast-iron registers one to each
sole to cut off communication between the soles and flues M, M; and
chimney L', L', I, openings for the passage of the sulpurous acid; N,N,
gallery in communication with the openings L', L', L', for collecting the
sulphurous acids; K', K³, K', vertical registers, one to each sole, for
cutting off communication between the soles and N, N, when required;
O flue to chimney; P¹, communication between the gallery N, N, and the
lead chambers; E, E, stove or drying chamber for heating the air used
in the process. A small railway allows the wagons loaded with materials"
to be dried to circulate in the interior.
a, a, a, passages for carrying the air from the stove on to the soles;
b, b, b, orifices for distributing the air from the passages a, a, a. This
distribution is regulated by valves. ✗, flue furnished with a register for

page_text: passing the flame directly to the chimney if necessary; f,ƒ, f, circular
angle iron ties which also serve as platforms for the working doors.
In witness whereof, I, the said George Tomlinson Bousfield, have
hereunto set my hand and seal, this Fifth day of June, in the
year of our Lord One thousand eight hundred and seventy-
five.