Improvements in Kilns for Burning or Caloining Limestone or like Substances.
Year: 1894

page_text: Date of Application, 23rd Aug., 1894
Complete Specification Left, 23rd May, 1895-Accepted, 13th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in Kilns for Burning or Caloining Limestone or like
Substances.
I, WILLIAM SPENCER of Lothersdale near Keighley in the County of York,
Gentleman, do hereby declare the nature of this invention to be as follows, that is
to say :-
It relates to improvements in the formation or construction of kilns, for burning
or calcining limestone or like substances, whereby the otherwise wasted heat is to a
considerable extent utilized with a consequent saving of fuel.
In carrying my invention into effect I follow the method of construction set.
forth in the Specification for which Letters Patent were granted bearing date the.
15th day of March 1870 and numbered 767, with the exception that I place.or
form a dome or arched-top over or upon the upper cavity or chamber in a similar
manner to that followed in the formation of the lower chamber, and above this
upper chamber I again form another chamber so that I have thus two domed
chambers beneath an upper cavity or chamber.
Through each of the domes or arched-tops or through the walls beneath the
domes or arches of these chambers I form openings to allow the fuel to be fed to
the kiln as occasion requires while the passages, for the limestone and the bulk of
the material in the upper chambers to traverse in descending to those beneath, are
preferably of rectangular shape and are relatively so formed in the two domes that
the one lies across the other, thus the volume of heated air or other gases in
ascending from the chamber beneath is deflected at this part and must thereby be
caused to follow a course that will enable it to impinge on portions of the limestone
that would otherwise pass through a less heated course had the walls of these
passages to lie in the same vertical planes.
The number of superposing cavities or chambers with domed or arched tops may
of course be increased as is found necessary, however for most purposes those made.
use of as above described are sufficient.
Dated this 22nd day of August 1894.
=
WILLIAM SPENCER,
Per Samuel Hey,
Agent.
Improvements in Kilns for Burning or Calcining Limestone or like
Substances.
I, WILLIAM SPENCER of Lothersdale near Keighley in the County of York,
Gentleman, 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, that is to say :-
It relates to improvements in the formation or construction of kilns for burning
or calcining limestone or like substances whereby the otherwise wasted heat is to a
considerable extent utilized with a consequent saving of fuel.

page_text: In carrying my invention into effect, I follow the method of construction set
forth in the Specification for which Letters Patent were granted bearing date the
15th day of March 1870 and numbered 767 with the exceptions hereinafter described
the same being illustrated by the accompanying sheets of drawings to which
reference is made herein by figures and letters.
Figs. 1 and 2 are sectional front and side elevations of a kiln built in accordance
with my invention.
Fig. 3 is a view of the kiln as seen from above.
Figs. 4 and 5 are sectional plans on lines A B and C D respectively.
Figs. 6 and 7 are similar views to Figs. 1 and 2 respectively but are illustrative
of a modification in the formation of the kiln as hereinafter explained.
Fig. 8 is a view of the class of kiln shown by Figs. 6 and 7, as seen from
above.
Fig. 9 is a sectional view on line E F of the kiln shown by Figs. 6, 7 and 8.
Like figures and letters indicate like parts throughout the several views.
In accordance with my invention I form a dome or arched-top over or upon the
upper cavity a in a similar manner to that followed in the formation of the lower
chamber or cavity b, and above this upper cavity a I again form another cavity ƒ so
that I have thus two domed chambers or cavities a b beneath the upper cavity or
chamber f.
Through each of the domes or arched-tops cg I form openings e e and h h (or
these openings may be made through the walls beneath these domes or arches c g
although I preferably follow the former arrangement and so it is the only one
herein shown) to allow the fuel to be fed to the kiln as occasion requires, while the
passages km for the limestone and the bulk of the material to traverse in descending,
are preferably of rectangular shape as shown by Figs. 4 and 5, or they may be
of any other oblong form, and are relatively so formed or situated in the two-
domes c and g that the one lies crosswise the other, thus the volume of heated air
or other gases in ascending from the cavity 6 through the cavity a into the cavity f
is deflected at or by the dome g and must thereby be caused to follow a course that
will enable it to impinge on portions of the limestone that would otherwise pass
through a less heated or cooler course had the walls of these passages k m to lie in
the same vertical planes.
I
Instead of the upper dome g being formed as above described, a bridges may be
thrown across or formed in the position and as shown by Figs. 6, 7, 8 and 9, in
which case two passages t t¹ are left in place of the one passage m, yet these two
passages I still arrange to lie across the lower passage k while the openings h h
pass partly through the bridges and so lead or conduct any fuel passing through:
them to a more central position in the cavity a; from which it will be seen that
can thus supply fuel to two different parts of the kiln, the upper one enabling me
to produce sufficient heat at this part to raise the temperature of the pieces of
limestone as they descend through the cavity f as will prepare them for the greater
heat below so that their falling-to-pieces incident to sudden expansion by reason of
being at once subjected to the excessive heat of the chamber b, is somewhat avoided
with the consequent advantages of improvement in the quality of the resultant lime,
while the lower part is thus prepared so that it may be kept regularly supplied
with fuel at whatever rate same may be consumed.
The number of superposing cavities or chambers with domed or arched-tops or
with bridges may of course be increased as is found necessary, however for most
purposes those made use of as above described are sufficient.
· Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that
what I claim is:―
1. In a kiln, the formation of a series of cavities with intervening passages
arranged relatively with each other substantially as herein specified.
2. In a kiln, the combination and arrangement of the cavities therein so that fuel

page_text: may be supplied thereto at two or more places substantially as and for the purposes
herein specified.
3. The method of forming and constructing kilos substantially as herein
specified.
100%
W. SPENCER,
Per Samuel Hey,
Agent.