IMPROVEMENTS IN FURNACES
Year: 1877

page_text: 'LETTERS PATENT to Sam Mason, junior, of Manchester, in the County of
Lancaster, Engineer, John Wolstenholme, of the Albert Works, Radcliffe
Bridge, in the same County, Hydraulic Engineer, and Samuel Spencer, of
Radcliffe Bridge aforesaid, Engineer, for the Invention of "IMPROVEMENTS IN
FURNACES"
Scaled the 24th July 1877, and dated the 12th February 1877.
PROVISIONAL SPECIFICATION left by the said Sam Mason, John Wolsten-
holme, and Samuel Spencer at the Office of the Commissioners of Patents on
the 12th February 1877.
SAM MASON, junior, of Manchester, in the County of Lancaster, Engineer,
JOHN WOLSTENHOLME, of the Albert Works, Radcliffe Bridge, in the same County,
Hydraulic Engineer, and SAMUEL SPENCER, of Radcliffe Bridge aforesaid, Engineer.
"IMPROVEMENTS IN FURNACES."
Our Invention is applicable to steam boiler and other furnaces, and it consists
in an improved mode of supplying steam and air to the fire-bars to promote the
combustion of the fuel, and to prevent smoke.
The fire-bars of our improved furnace are hollow, and they are provided with
side perforations; the front ends of the fire-bars are open, and rest upon the flange
of a hollow dead plate, and the back ends of the fire-bars are closed, and bear
upon a cross rail fixed to the bridge as usual.
A constant supply of steam and air is kept up through the hollow fire-bars, and
through the perforations at each side thereof, by means of an injector consisting
of a nozzle through which a small jet of steam passes and a combination nozzle,
which is supplied with atmospheric air. The injector forces the current of air and
steam into the hollow dead plate, from whence it enters the fire-bars; and in order
to distribute the air and steam evenly through the fire-bars we place a baffle plate
opposite the entrance pipe. By this means the air and steam are supplied to all
?

page_text: parts of the grate, thereby keeping a bright fire, and consuming the smoke. The
current of air and steam also keeps the fire-bars cool, and prevents the adhesion
of clinkers. The fire-bars may be placed longitudinally as usual or crosswise.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Sam Mason, John Wolstenholme, and Samuel Spencer in the Great
Seal-Patent-Office.on the 8th August 1877.
SAM MASON, junior, of Manchester, in the County of Lancaster, Engineer, JOHN
WOLSTENHOLME, of the Albert Works, Radcliffe Bridge, in the same County,
Hydraulic Engineer, and SAMUEL SPENCER, of Radcliffe Bridge aforesaid, Engineer.
"IMPROVEMENTS IN FURNACES."
Our Invention is applicable to steam boiler and other furnaces, and it consists
in an improved mode of supplying steam and air to the fire-bars' to promote the
combustion of the fuel, and to prevent smoke.
And in order that our Invention may be fully understood and readily carried
into operation, we will proceed to describe the accompanying Sheet of Drawings,
in which,-
Fig. 1 is an end view; Fig. 2, a longitudinal section; and Fig. 3 a plan, also in section,
of an ordinary two-flued cylindrical boiler to which our improved furnace is applied.
We wish it, however, to be understood that our improvements are applicable to
various other descriptions of furnaces for steam boilers, and for other purposes.
Figs. 4, 5, and 6 are detached views on an enlarged scale of the hollow dead plate
forming part of our improved furnace, and Fig. 7 is a transverse section of our
improved fire-bar.
a is the outer casing of the boiler; b, b, the flues; c are the fire-bars, which are
hollow, and provided with side perforations, as shewn in Fig. 7; the front ends of
the fire-bars are open, and rest upon the flange of the hollow dead plate d, shewn
in Figs. 4, 5, and 6, and the back ends of the fire-bars are closed, and bear upon the
cross rail e fixed in the bridge fas usual.
In some cases the ends of the fire-bars are left open to increase the supply of air
at the bridge, and thereby to assist in consuming the smoke.
A constant supply of steam and air is kept up through the hollow fire-bars c, and
through the perforations at each side thereof, by means of an injector g, consisting
of a nozzle through which a small jet of steam passes, and a combination nozzle,
which is supplied with atinospheric air. The steam is supplied through the pipe h,
and the air is admitted through the bell mouth i. The injector forces the current
of air and steam into the hollow dead plate d, from whence it enters the fire-bars c;
and in order to distribute the air and steam evenly through the fire-bars we place a
baffle plate opposite the entrance pipe from the injector. By this means the air
and steam are supplied more evenly to, all parts of the grate, thereby keeping a
bright fire, and consuming the sinoke; the current of air and steam also keeps the
fire-bars cool, and prevents the adhesion of clinkers. The fire-bars may be placed
longitudinally as usual or crosswise.
The dotted lines k, in Fig. 1, represent the scum pipes, and the dotted lines / the
feed water pipes, both of which are made as usual.
Having thus stated the nature of our Invention, and described the manner of
performing the same, we wish it to be understood that we do not intend to limit
ourselves to the details given, as they will vary according to the peculiar shapo of
the boiler or other furnace to which they are applied; and we claim, the appli-
cation of an injector for supplying a combination of air and steam to the per-

page_text: forated fire-bars of furnaces for steam boilers and for other purposes, as shewn and
described.
In witness whereof, we, the said Sam Mason, junior, John Wolstenholme, and
Samuel Spencer, have hereunto set our hands and seals, this Third day of
August, One thousand eight hundred and seventy-seven.
SAM MASON. JR.
(LS)