IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES
Year: 1865

page_text: LETTERS PATENT to John Lockwood, of Leeds, in the County of York,
Engineer, for the Invention of "IMPROVEMENTS IN STEAM BOILER AND
OTHER FURNACES."
Sealed the 20th February 1866, and dated the 22nd August 1865.
PROVISIONAL SPECIFICATION left by the said John Lockwood at
-the-Office-of- the- Commissioners-of Patents,-with-his-Petition, -on-the-
22nd August 1865.
I, JOHN LOCKWOOD, of Leeds, in the County of York, Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN STEAM BOILER
AND OTHER FURNACES," to be as follows:-
This Invention relates to a peculiar construction of grate bars and mode of
working or moving such grate bars in order to prevent the formation of
clinkers, and to remove the ashes readily therefrom, also to promote a more
free admission of air to the furnace.
Each bar is constructed with a central rib (as ordinary) and with short
bars cast thereon projecting from each side, leaving suitable spaces or gratings
betwixt them. At each end of the central rib is a pivot to rest in holes or

page_text: 'notches formed in the bearers, and so as to be capable of rocking therein.
To each bar is a lug or short lever with a stud pin, on which a link or rod is
placed so as to connect together a series of such grate bars when placed side
by side, filling up the width of the furnace. By means of a suitable hand
lever connected thereto and projecting to the front of the furnace the
attendant can operate or cause these bars to rock on their pivots.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Lockwood in the Great Seal Patent Office on the
22nd February 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
LOCKWOOD, of Leeds, in the County of York, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-second day of August, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth 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
executors, 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 FURNACES," upon the condition (amongst others) that I, the said
John Lockwood, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly describe
and ascertain 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 per-
formed, to be particularly described and ascertained in and by the following
statement and accompanying Sheet of Drawings (that is to say):-
This Invention relates to a peculiar construction of grate bars and mode of
working or moving such grate bars in order to prevent the formation of

page_text: clinkers and to remove the ashes readily therefrom, also to promote a more
free admission of air to the furnace.
Each bar is constructed with a central rib (as ordinarily) and with short
bars cast thereon projecting from each side, leaving suitable spaces or gratings
betwixt them. At each end of the central rib is a pivot to rest in holes or
notches formed in the bearers and so as to be capable of rocking therein. On
each bar is cast a ling or short lever with a stud pin, on which a link or rod is
placed so as to connect together a series of such grate bars when placed side
by side, filling up the width of the furnace. By means of a suitable band
lever connected thereto and projecting to the front of the furnace the attendant
can operate or cause these bars to rock on their pivots.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a front elevation of an ordinary furnace or fire tube of a fire-box
boiler with my improvements applied thereto; Fig. 2, a longitudinal section;
Fig. 3, a cross section; and Fig. 4, a sectional plan of the same.
A are a series of four grate bars, which it will be seen are formed of a
central rib (similar to an ordinary grate bar) but with a pivot at each end to
fit loosely so as to rock in holes or notches provided in the back bearer B and
dead plate C. On each side of these ribs are cast a series of short bars a,
leaving suitable spaces or gratings betwixt them. A lug D is also cast on each
grate bar in which a stud pin is fixed, and a link or rod E connects the
series of bars together. One end of an arm G is fixed on a short shaft, which
is supported in a bracket H fixed to the dead plate, the other end being
attached by a stud pin I fixed in the connecting link. The outer end of this
_shaft is squared or so formed that a hand lever J may be placed thereon by
the attendant, with which lever the grate bars may be operated or caused to
rock or oscillate on their pivots, as shewn by dotted lines, and thus stir and
break up the fire or the burning fuel, thereby preventing the formation of
clinkers, and removing the ashes, as also promoting a free admission of air
through the gratings to the fuel, whereby a better combustion of the fuel is
obtained and of smoke prevented or consumed.
Having thus described the nature of my said Invention, and the manner in
which the same is performed or carried into practical operation, I would have
it understood that I do not confiue myself to the precise details of construction
5 and arrangement as herein shewn as it is evident various modifications may
be made therein; but what I claim is, constructing the grate bars of such
furnaces with short bars projecting from one or both sides of the main bars or

page_text: ribs, and capable of rocking or oscillating, in manner substantially as herein
shewn and described.
In witness whereof, I, the said John Lockwood, have hereunto set my
hand and seal, this Nineteenth day of February, One thousand eight
hundred and sixty-six.
Signed, sealed, and delivered by the
within-named John Lockwood, in
the presence of
ARTHUR B. CROSSLEY,
JOHN LOCKWOOD.. (L.S.)
Clerk to William Tasker,
Patent Agent,
Halifax.