A SMITH'S FORGE FOR TO USE ANTHRACITE COAL AS FUEL AND STEAM TO BLOW AS WELL AS BLAST
Year: 1882

page_text: LETTERS PATENT to William Roberts, of Burry Port Foundry South Wales,
for an invention of "A SMITH'S FORGE FOR TO USE ANTHRACITE COAL AS
FUEL AND STEAM TO BLOW AS WELL AS BLAST."
PROVISIONAL SPECIFICATION left by the said William Roberts at the
Office of the Commissioners of Patents on the 14th March 1882.
WILLIAM ROBERTS of Burry Port Foundry Burry Port R SO South Wales
A SMITH FORGE USING ANTHRACITE COAL AS FUEL ALSO STEAM TO BLOW AS
WELL AS BLAST.
The air or blast chamber right under the
as shown on tracing. The blast admitted in
to rake out the slag & ashes.
hearth, reaching across from A to B
one end, and a door at the other end
In a gap on the top of the said blast chamber marked C & D on tracing, there
are perforated fire bricks inserted, and through the perforations the blast comes
out to the fire, and a fire the whole length of the gap can be made, and a welding
beat of the same in width can be got if necessary and reduced to any width of fire,
by simply stopping up the holes in the said bricks to suite, and the said bricks are
easily changed with spair bricks to be kept in stock and cemented up in the
ordinary way which the smith himself can do.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Roberts in the Great Seal Patent Office on the
14th September 1882.
WILLIAM ROBERTS of Burry Port Foundry, South Wales A. SMITH'S FORGE
FOR TO USE ANTHRACITE COAL AS FUEL, AND STEAM TO BLOW AS WELL AS
BLAST.
My Invention relates to an improvement in smith's forges in which anthracite
coal is to be used as fuel, and it consists in constructing the hearth with an air or
blast chamber beneath it extending across from back to front and with a gap in
the hearth immediately above the blast chamber, and in fitting into said gap
perforated fire bricks or asbestos bricks covering the blast chamber and through
which the blast issues, whereby a fire may be made, and a welding heat obtained,
over the whole length and width of the gap or any less extent by stopping up
certain of the holes in the brick so as to lessen the area of the blast as may be
desired. By this construction a more uniform heat is obtained throughout the fire
than when the ordinary tue iron is used, which it is the object of my Invention to
dispense with. The blast chamber is provided with an inlet for a jet of steam
which it is necessary should accompany the blast of air in order to ensure complete
combustion of the anthracite coal, and which may also be used independently of
the air blast when desired. The blast chamber is furnished with a valve to
regulate the blast, and with a door at which to rake out the ashes.
In order that the Invention may be more readily understood, I have illustrated
it in the accompanying drawings, and will proceed to more fully describe it with
reference thereto.
Figures 1. 2. and 3 are respectively a rear side and front elevation of a forge
provided with the improvement of my Invention; Figure 4 is a top plan of the
forge, Figure 5, a plan of the hearth with the hood leading to the chimney
removed, and Figure 6 is a cross section of the perforated brick and blast chamber
as applied to the hearth.
a is the hearth of the forge which is of the usual type, and is the blast chamber
beneath the hearth and extending from front to back thereof. This is a trough
cast in one with or separately from and bolted to the underside of the hearth
beneath an aperture in the hearth of corresponding shape to the blast chamber but
rather larger so as to receive and support the perforated fire bricks c which are
cemented into the said aperture and form a perforated top to the blast chamber
through which the air issues. These bricks may be easily changed for others with
holes of different size or number, or renewed when necessary, spare bricks being
kept at hand, and they may be easily set in cement by the smith himself. The
effect of the hot fire bricks at the bottom of the fire and in contact with anthracite
coal ensures a perfect welding heat. d is a valve at the end of the blast chamber
at which the blast is admitted carried upon an axis e and adjusted by a hand
lever to regulate the admission of the air. A suitable connection is provided at
this end of the chamber for coupling thereto the stand pipe which conveys the
blast from the fan blower or bellows. g is a door closing the opposite end of the
blast chamber at which slag and ashes that may fall into the blast chamber may
be raked out. h is the steam inlet to the blast chamber.
Having described the nature of the said Invention and the manner of performing
the same I declare that what I claim as the Invention to be protected by the
bereinbefore in part recited Letters Patent is.

page_text: The construction of smith's forge, in which anthracite coal may be used as fuel,
with a blast chamber beneath the hearth covered by perforated fire bricks fitted in
an aperture in the hearth over the blast chamber, substantially as herein described
and shown in the drawings annexed.
In witness whereof I the said William Roberts have to this my Specification
set my hand and seal this thirteenth day of September A.D. 1882.