Improvements in Kilns.
Year: 1889

page_text: Date of Application 25th June, 1889
Complete Specification Left, 25th Mar., 1890-Accepted, 24th May, 1890
TRUVIDIONAL SPECIFICATION.
Improvements in Kilns.
I, ABRAHAM THORNALLEY, of 3, Dudley Terrace, Grantham, in the county of
Lincoln Brick and Tile manufacturer, do hereby declare the nature of this invention
to be as follows:-
An improvement in Hoffman's Brick Kilns, by means of passing the waste heat
from the burnt bricks through a continuous flue upon the top of the kiln, over the
burning chambers, and through the green bricks. By the adoption of this method
no coal fires are required for drying the bricks before firing or burning.
Dated this 24th day of June 1889.
FREDK. WALKER & HYDE,
4, Little Moorfields, London, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Kilns.
I, ABRAHAM THORNALLEY of 3 Dudley Terrace, Grantham in the county of
Lincoln, Brick and tile manufacturer 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 :-
My invention relates to an improvement in that class of brick kilns generally
known as Hoffman's, and has for its object the utilization of the waste heat from
the burnt bricks for the preliminary process of drying the green bricks, thus dis-
pensing with coal fires therefor, and also rendering the action of the kiln when
in use, continuous and rapid.
In order that my invention, and the method of operating same, may be better
understood, I have appended the accompanying sheet of drawings, in which Figure 1
represents a sectional plan of a Hoffman kiln, with the improvements according to
my invention, the section being taken upon the line A B Figure 2. Figure 2
represents a transverse section of the kiln, upon the line C D Figure 1. Similar
letters of reference indicate corresponding parts in both views.
O represents a continuous oven, with openings P for charging and discharging.
S is a central chamber for receiving the products of combustion, and is divided
by the chimney or uptake U. A certain number of flues F open at o in the
oven O, and serve to conduct the heat and products of combustion to the central
chamber S, through openings p which are provided with shutters or dampers,
operated by the handles h, for closing said openings when necessary. At certain
distances apart around, and near the top of, the oven O, are placed short flues f
leading into a continuous flue or tunnel s. Shutters or dampers are provided to
Fuel is admitted to the
each of the flues f, and are controlled by handles h².
oven O by means of shoots c furnished with suitable covers.
In using the improved kiln according to my invention, and as above described
with reference to the drawings, the oven O is partly filled with bricks, openings
being left in the stacks under the shoots c and also to clear the openings o and
flues f, and the drying and burning of said bricks is proceeded with in the usual
way, with the exception that stacks of green bricks may be placed in the oven
while the process of burning is proceeding, and the dampers controlling the flues F,
operated by the handles are closed in that part of the oven where the bricks
are burning, and the heat from said bricks diverted, by means of the flues f, and
tunnel s to that part of the oven where the green bricks have been stacked, so that
the drying process may be carried on without the use of a separate fire. The

page_text: heat, after passing through the green bricks may be directed into the central
chamber S, and thence into the smoke stack. or uptake U, by opening one or more
of the flues F by means of the dampers and handles h directly under or near to
said green bricks. After said bricks are dried, the burning process may be carried
out in the usual manner, and the waste heat may be diverted by the dampers
and handles and to another stack of green bricks in another part of the oven,
and the burnt bricks may be removed. In this manner I am enabled to make the
action of the kiln continuous, and also to effect a considerable economy in fuel.
The heat may be caused to traverse any section or sections of the oven by a
proper manipulation of the handles and dampers hh, and similarly any section or
sections may be shut off when required.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
.
First. In a kiln for drying and burning bricks, the combination of a continuous
chambers flues f, and dampers with handles h', with a continuous oven O flues F,
smoke chamber S and dampers with handles substantially as and for the purposes
herein described with reference to the appended drawings.
Second. The method of, and means for, diverting the waste heat from burning
bricks for drying green bricks in a continuous kiln, substantially as described.
oul 1
"
1 1001
FREDK. WALKER & HYDE,
4, Moorfields, Fore Street, London, E.C., Agents for the Applicant.