IMPROVEMENTS IN STOVES OR FIRE-PLACES
Year: 1876

page_text: LETTERS PATENT to John Jobson, of Derby, in the County of Derby, for
the Invention of "IMPROVEMENTS IN STOVES OR FIRE-PLACES."
PROVISIONAL SPECIFICATION left by the said John Jobson at the Office of
the Commissioners of Patents on the 10th February 1876.
JOHN JOBSON, of Derby, in the County of Derby. "IMPROVEMENTS IN STOVES
OR FIRE-PLACES."
A small
The object of the Invention is to economise the fuel and at the same time to
obtain the greatest amount of heat from the fire obtained with cleanliness in use.
For this purpose the back, sides, and the bottom of the lining are formed of fire-
clay moulded and burnt, and the sides and parts of the bottom incline not only
from the back to the front, but also into cach other, so as to give the fuel a
tendency to fall as it is consumed towards the centre of the front, by which a bright
fire will constantly be maintained without the necessity for stirring.
portion of this inclined bottom is perforated or open to receive another portion of
fire-brick, perforated for the passage of cinder or dust to the ash-pit below, and this
ash-pit is formed with a close but moveable pan to prevent the admission of air to
the under side of the fuel through the perforated brick, whereby the stove,
although having a perforated bottom, becomes practically a slow combustion fire-
place.
The opening in the bottom of the front plate of the stove or fire-place may be
larger than what would be required simply for the passage of the pan for the ashes
in order to admit air to an air chamber formed within the front plate, or such air
may be admitted by other openings in the front plate, or from behind the stove or
beneath it, through suitable channels, which may have regulators or gauze to
regulate such admission.
The passages to the air chamber from the room, particularly near the fire, are
provided with wire gauze or such like reticulate work to prevent admission of small
particles of dust from the fire or otherwise to the air chamber.
The front of the pan for the ashes I in some cases form to incline from the top
backwards to the bottom of it, so that it may not be readily visible from the room,
and so leave the hearth the clearer at that part.
The air chamber surrounds the outlet froin the fire-place to the chimney, forming

page_text: a throat, and the surface of this throat inclines from the bottom to the top inwards
so as to meet the heat of the fire for the better heating of the air within, and fins
or projections are formed on both the inner and outer surface of this throat portion,
or of part thereof, the better to receive heat for communication thereof to the air
within.
A moveable dividing plate is applied to this throat to divide the draught to the
chimney when the fire-place is in use and to close the passage when the fire-place is
not in use.
The heated air escapes into the apartment from the air chamber by suitable
passages at the upper part of the front plate, or it may be conducted to another or
other apartments, and these passages may have regulators applied to them.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Jobson in the Great Seal Patent Office on the 4th August
1876.
JOHN JOBSON, of Derby, in the County of Derby.
OR FIRE-PLACES."
"
IMPROVEMENTS IN STOVES
The object of the Invention is to economise the fuel and at the same time to
obtain the greatest amount of heat from the fire obtained with cleanliness in use.
For this purpose the back, sides, and the bottom of the lining are formed of fire-
clay moulded and burnt, and the sides and parts of the bottom incline not only
from the back to the front, but also into each other, so as to give the fuel a tendency
to fall as it is consumed towards the centre of the front, by which a bright fire will
constantly be maintained without the necessity for stirring. A small portion of
this bottom is perforated or open to receive another portion of fire-brick perforated
for the passage of cinder or dust to the ash-pit below, and this ash-pit is formed
with a close but moveable pan to prevent the admission of air to the under side of
the fuel through the perforated brick, whereby the stove, although having a per-
forated bottom, becomes practically a slow combustion fire-place.
The opening in the bottom of the front plate of the stove or fire-place may be
larger than what would be required simply for the passage of the pan for the ashes
in order to admit air to an air chamber formed behind the front plate, or such air
may be admitted by other openings in the front plate, or from behind the stove or
beneath it through suitable channels, which may have regulators or gauze to
regulate such admission.
The passages to the air chamber from the room particularly near the fire are pro-
vided with wire gauze or such like reticulate work to prevent admission of sinall
particles of dust from the fire or otherwise to the air chamber.
The front of the pan for the ashes I in some cases form to incline from the top
backwards to the bottom of it so that it may not be readily visible from the room,
and so leave the hearth the clearer at that part.
The air chamber surrounds the outlet from the fire-place to the chimney, forming
a throat, and the surface of this throat inclines from the bottom to the top inwards
so as to meet the heat of the fire for the better heating of the air within, and fins
or projections are formed on both the inner and outer surface of this throat portion
or of part thereof the better to receive heat for communication thereof to the air
within.
A moveable dividing plate is applied to this throat to divide the draught to the
chimney when the fire-place is in use somewhat as described in the Specification of
Letters Patent granted to myself together with Edgar Williman Jobson and
Godfrey Jobson, bearing date March Eighth, One thousand eight hundred and
seventy-three, No. 836, but which I now arrange so that it may be used to close
that passage to the chimney when the fire-place is not in use.

page_text: The heated air escapes into the apartment from the air chamber by suitable
passages at the upper part of the front plate, or it may be conducted to another or
other apartments, and these passages may have regulators applied to them.
But that the Invention may be the better understood I will by the aid of the
accompanying Drawings proceed to describe means pursued by me in carrying the
same into effect.
Figure 1 shews an external elevation; Figure 2, a plan view looking downwards;
Figure 3, an edge view; Figure 4, a vertical section; and Figure 5, a back view
partly in section of a stove or fire-place arranged according to my Invention;
Figure 6 shows a horizontal section of the same taken through the lines A, B, of
Figures 1 and 4; Figures 7, 8, 9, 10, 11, 12, and 13 shew details.
In all the Figures the same letters indicate corresponding parts.
pan e.
a is the front plate of the stove or fire-place; b is the fire-place proper or the
receptacle for the fuel to be burned; c represents the fire-clay lining forming the
back, sides, and the bottom of the fire-place, and which it will be seen incline not
only from the back to the front, but also one part into the other, so as to give to
the fuel a tendency to fall as it is consumed towards the centre of the front. This
fire-clay lining is formed open in the centre of its bottom part to receive a corre-
spondingly formed moveable piece d, and this portion & is perforated at d for the
passage of cinder or dust to the ash-pan e and to facilitate the passage of such dust
and ashes to the ash-pan e, as well as to ensure a close fitting chamber for the ash-
The bottom plate f of the stove is formed, as more clearly shewn by Figs. 7,
8, and 9, with the opening f¹ through it for the passage of the dust and ashes to tho
ash-pane separate from the side passages f³, f³, by which air froin the apartment
may enter to behind the front plate a of the stove to become heated. It will thus be
seen that the opening at the bottom of the front of the stove or fire-place is formed
sufficiently large not only for the passage of the ash-pan e, but for air to the sides
and behind the fire-place to become heated, and these several passages are all formed
immediately under the fire-place or chamber, that is, in the space ordinarily occupied
as the ash-pit or chamber by which the heating of the air passing to the chamber g
is greatly facilitated. The air thus admitted by the passages f³, f³, rises through
the openings f, f, in the plate f into the chamber formed at the sides and back
of the fire-place b, and this chamber it will be seen surrounds the outlet / from
the fire-place b to the chimney, forming a throat, the surfaces i of which inclino
inwards, and fins or projections j and are applied both to the inner and outer
surfaces of this throat portion the better to receive and communicate heat to the
air in the air chamber g; is the dividing plate, which is hung to swing by its
necks in recesses formed for them in the upper part of the throat, and when
turned as indicated by dotted lines in Fig. 4 this dividing plate acts to close
the passage through the fire-plate to the chimney.
The air heated by circulation in the chamber g may escape by passages at a¹ or
by other suitable passages into the apartment, or it may be conducted by suitable
passages to another or other apartments with regulation if desired.
Fig. 7 shews an upper side view, Fig. 8, an under side, and Fig. 9, a front
sectional view of the plate and its parts.
In order to guard against the admission of small particles of dust from the firo
or otherwise the passages f³ are provided each with a tray m, separate plan, side,
sectional, and end views of one of which are indicated at Figs. 10, 11, 12,
and 13, for the purpose of carrying wire gauze n or other suitable reticulate or
open work. This wire gauze or other reticulate openwork is applied over the
entire upper surface of each tray m, or is otherwise applied, so as to obtain as
large a surface as possible of it, so as to ensure a free passage for the air and
at the same time to secure a large filtering surface.

page_text: Having thus described my Invention and means which I adopt in carrying the
same into effect, I would have it understood that what I claim is,―
First. The arranging or combining parts of stoves or fire-places whereby the
clay lining is applied to incline to the lower part of the centre of, the fire-
chamber, and facility is afforded for the escape of dust and small particles from
the consumed fuel into a close chamber provided for the purpose substantially as
described.
Secondly. I claim the arranging or combing parts of stoves or fire-places whereby
the passage for the admission of air from the apartment in which such stove or fire-
place is fixed to a chamber behind the front of such stove or fire-place as well as
that for the ash-pan are formed immediately under the fire-space, substantially as
described.
In witness whereof, I, the said John Jobson, have hereunto set my hand and
seal, this Second day of August, in the year of our Lord One thousand.
eight hundred and seventy-six.
Witness,
WILLIAM BROOKES,
62, Chancery Lane,
London.
JOHN JOBSON. (L.S.)