Im- PROVEMENTS IN APPARATUS FOR BURNING AND CONSUMING SMOKE
Year: 1871

page_text: LETTERS PATENT to William Edward Kenworthy and John Johnstone,
both of Leeds, in the County of York, for the Invention of “Im-
PROVEMENTS IN APPARATUS FOR BURNING AND CONSUMING SMOKE."
Scaled the 24th October 1871, and dated the 28th April 1871.
PROVISIONAL SPECIFICATION left by the said William Edward
Kenworthy and John Johnstone at the Office of the Commissioners
of Patents, with their Petition, on the 28th April 1871.
We, WILLIAM EDWARD KENWORTHY and JOHN JOHNSTONE, both of
Leeds, in the County of York, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN APPARATUS FOR BURNING AND CONSUMING
SMOKE," to be as follows:-
:-
The object of this Invention is to cause a more perfect combustion
of the gases evolved in steam boiler and other furnaces whereby smoke
is prevented and a greater economy of fuel attained. For this purpose
we admit atmospheric air over the furnace grate in the manner hereafter
described, atmospheric air being also admitted to the under side of the

page_text: grate as usual. The air is admitted over and on to the grate through
one or more air passages or shoots, which have a slanting direction
pointing downwards in the direction of about the middle of the length
of the grate, more or less according to circumstances. This shoot or
shoots is or are formed in the furnace front over the door, is of a box-
like shape in front, and is there provided with a lid, which on being
opened more or less admits more or less atmospheric air on to the grate
as required.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Edward Kenworthy and John Johnstone
in the Great Seal Patent Office on the 27th October 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
EDWARD KENWORTHY and JOHN JOHNSTONE, both of Leeds, in the
County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of April, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fourth year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto us, the said William Edward Kenworthy and
John Johnstone, Her special licence that we, the said William Edward 2
Kenworthy and John Johnstone, our executors, administrators, and
assigns, or such others as we, the said William Edward Kenworthy
and John Johnstone, our executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS IN APPARATUS FOR BURNING AND CONSUMING
SMOKE," upon the condition (amongst others) that we, the said William
Edward Kenworthy and John Johnstone, our executors or adminis- a
trators, by an instrument in writing under our, or one of our, or their,
or one of their hands and seals, should particularly describe and ascer-
tain the nature of the said Invention, and in what manner the same
was to be performed, and cause the same to be filed in the Great Seal
'Patent Office within six calendar months next and immediately after 3
the date of the said Letters Patent.

page_text: NOW KNOW YE, that we, the said William Edward Kenworthy and
John Johnstone, do hereby declare the nature of the said Invention,
and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, reference
being had to the accompanying Drawings, and to the letters of reference
marked thereon, that is to say :-
The object of this Invention is to cause a more perfect combustion of
the gases evolved in steam boiler and other furnaces, whereby smoke is
prevented and a greater economy of fuel attained. For this purpose
we admit atmospheric air over the furnace grate in the manner hicreafter
described, atmospheric air being also admitted to the under side of the
grate as usual. The air is admitted over and on to the grate through one
or more air passages or shoots which have a slanting direction pointing
downwards in the direction of about the middle of the length of the
grate more or less according to circumstances. This shoot or shoots is
or are formed in the furnace front over the door of a box-like shape in
front, and is there provided with a lid, which on being opened more or
less admits more or less atmospheric air on to the grate as required.
Fig. 1 of the accompanying Drawings is a front elevation and Fig. 2
is a transverse section of apparatus for burning and consuming smoke,
constructed according to our Invention.
a is the grate to which air is admitted over or on through one or
more air passages or shoots b, which have a slanting direction, as shewn,
pointing downwards in the direction of the arrows in Fig. 2 to about
the middle of the length of the grate, more or less according to circum-
stances. This shoot or shoots bis or are formed in the furnace front
plate cover the doorway, and is or are of a box-like form, but when
required it or they may be fixed on the front plate c, as shewn at Fig. 3,
and in dotted lines at Fig. 1, a hole or holes having been previously
cut in the front plate. By this arrangement the apparatus may be
attached to any furnace front. When requisite a lid d may be used,
which on being opened more or less admits more or less atmospheric air
on to the fire as required.
Having now described the nature of our said Invention, and the
manner in which the same is to be performed, we would remark in
conclusion that we do not limit ourselves to the exact details, limits
and configuration of parts we have expressed and shewn as the same
may be varied or modified without in any way departing from our

page_text: Invention, as, for instance, instead of the crescent form of shoot ba
straight shoot in some cases may be used, but what we do claim and
desire to be secured to us by Letters Patent is; the arrangement, con-
struction, and application of apparatus for causing a more perfect
combustion of the gases envolved in steam boilers or other furnaces
substantially as herein set forth.
In witness whereof, I,' the said William Edward Kenworthy, for
myself and on behalf of the said John Johnstone, have hereunto
set my hand and seal, this Twenty-fifth day of October, in the
vear of our Lord One thousand eight hundred and seventy-one.