IMPROVEMENTS IN GRATES
Year: 1883

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex for an
Invention of IMPROVEMENTS IN GRATES communicated to him from abroad
by Eduard Breslauer, of Berlin, in the German empire
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 13th July 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "IMPROVEMENTS IN
GRATES," a communication to me from abroad by Eduard Breslauer, of Berlin,
in the German empire,
This invention has for its object to construct a grate which affords an abundant
supply of air, facilitates the stirring of the fire and possesses great durability.
For this purpose I compose the grate of disc-shaped, polygonal, or spherical
sections, which are either mounted lose on shafts or rigidly fixed to the same, the
said shafts being adapted to receive a rotary motion on their axes. Or the sections
may be placed side by side and supported at their circumference; they may be
made of metal, earthenware or any other suitable material.
The shafts are preferably made parallel to each other, but placed at different
heights and sufficiently low to extend through the side of the furnace. The sections
are sufficiently apart from each other to allow the desired quantity of air to pass.
If mounted loose on the shafts, they are adapted to be turned on the same by
ineans of suitable projections.
t

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan, in the Patent Office on the 11th January
1884.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "IMPROVEMENTS IN
GRATES," a communication to me from abroad by Eduard Breslauer, of Berlin,
in the German empire.
This invention relates to grates adapted to afford an abundant supply of air, to
facilitate the stirring of the fire, and to last a long, time without necessitating
exchange.
...
In describing this invention reference will be made to the accompanying drawing
of which Figs 1, 1°, 1b represent a grate embodying this invention, while Figs. 2
to 8 represent modifications of the same.
The improved grate is composed of disc-shaped, polygonal or spherical sections a
which are either mounted loose on shafts b or rigidly fixed to the same, the said
shafts being in some cases.adapted to receive a rotary motion on their axes.
Or the sections may be placed side by side and supported at their circumference;
they may be made of metal, earthenware or any other suitable material.
The shafts are preferably made parallel to each other, but placed at different
heights and sufficiently long to extend through the sides of the furnace. The
sections are sufficiently apart from each other to allow the desired quantity of air
to pass. If mounted loose on the shafts, they are adapted to be turned on the
same by means of suitable projections.
In the construction represented by Figs 1. 1ª and 1b the discs a are mounted on
shafts 6 (of any suitable cross section) supported by pivotal bearings in the side
walls of the furnace. The discs a are exchangeable but not adapted to turn on
the shafts. By turning the shafts and thereby the discs, the cinders and other
waste material may be removed.
In the modification represented by Fig. 2. the discs are replaced by balls.
Fig. 3 illustrates an arrangement in which the discs or balls are made in one
piece with the shaft.
i.
In the modification represented by Fig. 4 spherical or polygonal sections instead
of being mounted on shafts are placed loosely between posts c.;
In the modification represented by Fig. 5 the sections are loosely mounted on
fixed bars and are adapted to be turned by the contact of the poker with the
projections d.
U
+
Figs. 6, 7 and 8 represent various arrangements of the sections composing a
grate, and require no further description.
The shape of the sections may vary without departing from the invention.
.
CLAIM.
A grate formed of disc-shaped, polygonal or spherical section's mounted on
shafts or supported at their circumference, the said sections being made of metal,
earthenware or any other suitable material; substantially as described.",
C
In witness whereof I, the said Herbert' John Haddan have hereunto set my
hand and seal this 11th day of January A.D. 1884.