Improvements in Furnace Smoke Consuming Apparatus.
Year: 1891

page_text: Date of Application, 20th Feb., 1891
Complete Specification Left. 11th Nov., 1891-Accepted, 13th Feb.. 1892
PROVISIONAL SPECIFICATION.
Improvements in Furnace Smoke Consuming Apparatus.
JOHN MILLER 12 Wolseley Street Glasgow Bricklayer do hereby declare the
nature of this invention to be as follows:-
An invention whereby a current of air is carried underneath the bars of the
furnace, and here becoming heated, is in a fit state to promote combustion after
passing through the loopholes. It is constructed in such a manner that it cannot
by any means become choked with ashes from the furnace, or with flue dust. It
is simple in construction and requires neither attention nor cleaning out. It is
constant in its action and is no hindrance to draught.
The loopholes are composed of firebrick and are so arranged, as to allow the air
to pass through them in the form of a spray. The measurements of the loopholes
are about 24 by 1". The top covering of the loopholes is an iron plate of sufficient
thickness to resist contortion by the heat and at the same time giving off its licat
to the air as it passes through. The loopholes being built above the level of the
furnace bars the air after passing through them comes into close contact with
the smoke and so promotes combustion.
1001
COMPLETE SPECIFICATION.
Improvements in Furnace Smoke Consuming Apparatus.
JOHN MILLER 12 Wolseley Street Glasgow Bricklayer 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 apparatus is composed of firebrick and is situated in the back of the furnace
at the extreme ends of the furnace bars. In order to carry the furnace bridge a
semicircle, A is built on the inner side of the flue beneath the bars. The semi-
circle is composed of firebricks measuring 9 inches by 44 inches by 2 inches and
extends upwards to the level of the furnace bars. Across this semicircle an iron
plate B is laid to carry the furnace bridge D. Immediately beyond this semicircle
there rises a wall C almost to the level of the furnace bridge.
The base of this wall which is nine inches broad is in contact with the semicircle
already mentioned. The outer surface of this wall, or that side which is nearest
the flue is perpendicular but the inner side rises with a gentle slope making the
top of the wall seven inches broad. By means of the slope a cavity E is formed
between the wall and the furnace bridge. On the top of this wall a series of*
loopholes I are built by means of firebrick partitions H.
On the top of the loopholes an iron plate K is laid, which extends to the furnace
bridge. The manner in which the apparatus acts is as follows. A current of
air is carried underneath the bars of the furnace and after passing through the
bridge A strikes against the sloping surface of the wall. Here it passes upwards
between the cavity E formed by this wall and the furnace bridge. It here comes
into direct contact with the iron plate K forming the covering, which imparts to
it a high degree of heat previous to passing through the loopholes F.
While passing through the loopholes it receives a still greater heat from the
partitions H. These loopholes break up the current of air and allow it to pass
through in the form of a spray. As the current of air passes through the loop-
holes in a direct line with the smoke from the furnace it can cause no hindrance
to it.

page_text: Owing to the high position which the loopholes occupy, the heated air passing
through them comes into close contact with the smoke. As the loopholes are in a
horizontal position no ashes from the furnace nor flue dust can clog them.
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.
(1) That it will promote the combustion of smoke.
(2) That it is constant in its action and requires no attention.
(3) That it will not burn away nor become defaced by the heat of the
furnace.
(4) That it will not become choked with ashes from the furnace nor with
flue dust.
(5) That it is no hindrance to draught.
(6) That it is simple in construction and can be fitted to almost any kind of
furnace with little trouble.
Dated this Ninth day of November 1801
JOHN MILLER.