IMPROVEMENTS IN STEAM-BOILER AND OTHER FURNACES
Year: 1863

page_text: LETTERS PATENT to John Lockwood, of Batley, in the County of York,
Rag Merchant, for the Invention of "IMPROVEMENTS IN STEAM-BOILER AND
OTHER FURNACES."
Sealed the 2nd October 1863, and dated the 11th April 1863.
PROVISIONAL SPECIFICATION left by the said John Lockwood at the
Office of the Commissioners of Patents, with his Petition on the 11th
April 1863.
I, JOHN LOCKWOOD, of Batley, in the County of York, Rag Merchant, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN STEAM-
BOILER AND OTHER FURNACES," to be as follows:-
This Invention consists in having the bridge formed hollow with a grating
towards the fire-bed and open to the ashes-pit, and a swing door placed behind
the grating capable of being operated by a rod from the front of the furnace,
by which it may be closed against the openings of the grating or removed
therefrom, as required, to admit atmospheric air, whereby smoke will be
consumed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Lockwood in the Great Seal Patent Office on the 9th
October 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Joun
LOCKWOOD, of Batley, in the County of York, Rag Merchant, send greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of April, in the year of our Lord One
thousand eight hundred and sixty-three, in the twenty-sixth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
John Lockwood, Her special licence, that I, the said John Lockwood, my exe-
cutors, administrators, and assigns, or such others as I, the said John Lockwood,
my 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 STEAM-BOILER AND OTHER FUR-
NACES," upon the condition (amongst others) that I, the said John Lockwood,
my exccutors or administrators, by an instrument in writing under my, 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 the date of the said
Letters Patent.
NOW KNOW YE, that I, the said John Lockwood, do hereby declare
the nature of my said 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) :-
This Invention consists in having the bridge formed hollow with a grating
towards the fire-bed and open to the ashes-pit, and a swing door placed
behind the grating capable of being operated by a rod from the front of
the furnace, by which it may be closed against the openings of the grating or
removed therefrom, as required, to admit atmospheric air, whereby smoke will
be consumed.
In order that this Invention may be clearly understood, I have given
reference to an accompanying Sheet of Drawings, shewing the application of
it to a fire-box boiler furnace, in which Fig. 1 is a cross section of one fire-
box taken through the line A, B, in Fig. 2, shewing the front of my improved
bridge, and Fig. 2 is a longitudinal section of the same, taken through the
line C, D, in Fig. 1, shewing a section of the bridge and swing door, with the
rod for operating it from the front of the furnace; E is the bridge formed so
as to rest upon the bearer of the grate bars at the front and upon a fire-brick
wall at the back; G is the grating towards the fire-bed, and H is the swing
door hinged at the top edge to the bridge, and to the bottom edge is attached
a rod I, extending to the front, having notches J to catch on a fixing K.

page_text: It will be seen that by means of the rod the attendant can readily open and
close the swing door so as to admit more or less atmospheric air to pass from
the ashes-pit through the grating towards the fire-bed, which, coming in
contact with the unignited combustible gases and smoke from the fuel just as
they are passing away from the furnace unconsumed over the bridge, pro-
duces ignition and combustion thereof, generating or evolving heat, and
thereby consuming or preventing the escape of smoke.
I have here shewn the bridge as made of cast iron, but I would observe
that it may be made of fire-clay or other suitable material, and of other form
than the one shewn if desirable; also that the Invention may be applied to
other kind of boiler furnaces besides fire-box, and to furnaces in general.
Having thus fully described the nature of my said Invention, and the
manner in which the same may be performed or carried into practice, I would
have it understood that I do not confine myself to the precise details in the
form or material of construction or mode of application thereof as herein set
forth, but what I claim is, the application of a hollow bridge with gratings and
swing door to furnaces constructed, combined, and arranged substantially as
herein described and shewn in the accompanying Sheet of Drawings.
In witness whereof, I, the said John Lockwood, have hereunto set my
hand and seal, this Seventh day of October, One thousand eight
hundred and sixty-three.
Signed, sealed, and delivered by the
within-named John Lockwood,
in the presence
of
W*. TASKER,
Patent Agent,
Halifax.
JOHN LOCKWOOD. (L.S.)