Improvements in Kilns for Bricks, Pottery, and the like.
Year: 1898

page_text: Date of Application, 22nd Nov., 1898-Accepted, 23rd Dec., 1898
COMPLETE SPECIFICATION.
Improvements in Kilns for Bricks, Pottery, and the like.
We, WILLIAM FREDERICK MASON, of 504, Stockport Road, Longsight, Man-
chester, Engineer, and WILLIAM HENRY WILSON, of Newton Avenue, Longsight,
Manchester, Mechanical Engineer, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The improvements relate to kilns for burning or drying bricks, pottery and
other ware, and constitute a further improvement upon an invention for the
same purpose, for which Letters Patent have been granted to William Frederick
Mason, dated October 10th 1896 and numbered 22,486, having for object an
improved construction of kiln giving greater efficiency in use than at present
obtains.
To effect this and to accomplish our present improvements, we construct a kiln
composed of a number of compartments, by preference rectangular in formation,
and with arched roofs substantially as described in Specification No. 22,486 of
1896, with the exception of the side smaller gas and air tubes therein particularly
shown.
In carrying out our present improvements, we do not extend these side flues, for
air and gas, as separate flues, so far as the height of the outlet into the arched
roof, but, instead thereof, we take out the midfeathers or dividing walls for a
considerable distance from such outlet unto near the bottom of the same, in such
wise that the inlet flues for air and gas are short, and a narrow but open space is
left for the remainder of the distance to the opening into the arched roof.
By which means a slot like burner is provided on each side of the kiln, within
which there is a better opportunity for the gas and air to be intermingled than
is the case with keeping them in separated flues until the moment of emission
for firing purposes.
The general arrangements of the kiln, and the main flues thereof, together with
the separated entrances to the side flues, are substantially the same as described
and shown in the specification already referred to; but that the improvements
may be better understood we will, with the aid of the accompanying drawings,
proceed more fully to describe means employed by us.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a longitudinal section of a single compartment or kiln, and Fig. 2
is a section at right angles thereto of two compartments or kilns arranged in
series, of one form of our invention.
The same letters indicate corresponding parts wherever they occur.
a are the walls of the compartments or kilns supporting the arched roofs b.
c is the main conduit for supplying the various kilns with combustible gas such
as producer gas, which supply is regulated by a valve or valves d.
On valved being opened, the combustible gas enters the passage or flue or
flues e, and a requisite quantity of air is allowed to enter the passage or flue or
flues el above, from the end or side flue f.

page_text: The gas
then passes through the smaller and short side flues or openings, as
shown at g, while the air passes through similar, and by preference alternate, side
flues or openings as shown at h, with their exits into the slot which extends
to, and has its final exit in the upper part of the compartment.
In this way the combustible gas and the air are enabled to become largely inter-
mingled within the slot j, preparatory to emergence into the open space k under
the arched roof b, and, as a consequence, more perfect combustion takes place
directly over the articles to be fired.
The products of combustion are carried out of each compartment or kiln by
means of a down draught through the passages 7, into the flue or flues m, at the
bottom of the kiln, from whence they may be passed through other compartments
either rotationally or selectively by means of dampers and finally, or at any com-
partment directly, if required, through an outside flue to the chimney.
The air flue f is arranged to be in communication, with all the kilns by ex-
tending along the whole length of the series, but when it is desired to have such
communication prevented, for the time being, as between any single kiln and this
flue f, the damper fl may be used for such purpose, as well as for the purpose of
regulating the supply of air to the amount required.
Variations in detail, such as the material of construction of the various parts,
the number of cross flues for supply of gas and air to the upright diffusion slot
and entrance short flues or passages thereto, together with the relative size and
number thereof, and also other variations, may be made without departing from
the peculiar character of the invention.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is;-
In kilns for firing bricks, pottery, and the like, the combination of side slots j
with openings or entrances and for gas and air supplied with such air and
gas for gaseous firing from separate flues el and e and side flue f and conduit c,
whereby the air and gas become fired in the upper part of the compartment, and
the supply is regulated by valves or dampers or both, together with down draught
exits and flue m, the kilns or compartments being worked either rotationally or
selectively, for the purpose and in manner substantially as herein shown and
described.
Date 01
L
1000
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent for Applicants.