IMPROVE- MENTS IN THE CONSTRUCTION OF GAS STOVES
Year: 1878

page_text: LETTERS PATENT to John Sharpe Lawson, of Barnsley, in the West Riding of
the County of York, Clerk in Holy Orders, for the Invention of "IMPROVE-
MENTS IN THE CONSTRUCTION OF GAS STOVES."
Sealed the 25th March 1879, and dated the 21st December 1878.
PROVISIONAL SPECIFICATION left by the said John Sharpe Lawson at
the Office of the Commissioners of Patents on the 21st December 1878.
JOHN SHARPE LAWSON, of Barnsley, in the West Riding of the County of York,
Clerk in Holy Orders. "IMPROVEMENTS IN THE CONSTRUCTION OF GAS STOVES."
The object of this Invention is so to construct a stove for heating apartments by
means of
gas that none of the fumes or other products of the combustion of the gas
are allowed to escape into the apartment.
This I propose to effect principally by the application of lighted gas jets to a
radiating surface, constructed in such a form as to carry off the said fumes or
other injurious products of combustion at their highest point of contact with the
surface.
The stove may be placed on a flat stone in any convenient position in the apart-
ment where a communication can be made with the external atmosphere, the most
suitable place in a room provided with a chimney being upon a hearth-stone.
In such a case I cover in the whole of the aperture of the fire place with a sheet
of iron, in which perforations may be made (if necessary) to promote an upward
draught in the chimney.
Resting on the hearth stone (or a short distance above it) I have a gas burner
with several jets in a ring or other convenient form and connected by a pipe to the
gas supply. Over this I mount upon a tripod or other suitable stand a radiating
cover, open at the bottom, and converging towards an apex at the top, somewhat
in the shape of a beehive or a sugar loaf.
This radiating cover may be varied in form to a considerable extent so long as
its principal distinguishing feature is retained, which is, that it is contracted or

page_text: converges towards the apex where it is provided with a bent tube to carry off the
fumes and other noxious products of combustion of the gas.
This tube passes
through a hole in the sheet iron and its end is open to the chimney or fire place.
In apartments not provided with a chimney or fire place the tube may be
carried out into the atmosphere through the window, or through a wall or ceiling
as may be most convenient.
+
The aperture at the end of this tube may be contracted if necessary by the inser-
tion of a plug of cork or other material with a small bole bored through the
centre.
The radiating cover may be made of a variety of materials, such as glass, porce-
lain, terra cotta, or metal (the first being preferred), and it may be wholly or
partially transparent, and either plain, colored, or otherwise ornamented. If desired
a wire screen of suitable form may be placed over the stove to protect it, and the
top of such screen (if made flat) may be utilized to rest vessels upon in order to
keep their contents warm.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said John Sharpe Lawson in the Great Seal Patent Office on the 20th June
1879.
JOHN SHARPE LAWSON, of Barnsley, in the West Riding of the County of York.
"IMPROVEMENTS IN THE CONSTRUCTION OF GAS STOVES.”
The object of this Invention is so to construct a stove for heating apartinents by
means of gas that none of the fumes or other products of combustion of the gas are
allowed to escape into the apartment.
This I propose to effect principally by the application of lighted gas jets to a
radiating surface constructed in such a form as to carry the said fumes or other
injurious products of combustion at their highest point of contact with the
surface.
Such being the nature and object of my said Invention, I will now proceed to
describe in detail the manner in which the same is to be or may be performed or
carried into practical effect, and in order that the same may be clearly understood,
I have annexed hereunto a Sheet of Drawings illustrative thereof, and have
marked the same with figures and letters of reference corresponding with those in
the following explanation thereof.
Fig. 1 in the annexed Drawings is a perspective view of a stove complete, and
Figs. 3, 4, and 5 are detached views of the separate parts.
The stove may be placed on a flag stone in any convenient position in the apart-
ment where a communication can be made with the external atmosphere, the most
suitable place in a room provided with a chimney being upon the hearth stone as
shown at a, a, Fig. 1.
In such a case I cover in the whole of the aperture of the fire place with a sheet
of iron a*, a*, in which perforations may be made (if necessary) to promote an
upward draught in the chimney.
Resting on the hearth stone a, a, a short distance above it, I have a gas burner
with several jets in a ring or rings as at b, b, Fig. 4, or other convenient form, and
connected by a pipe to the gas supply. Over this I mount upon a tripod or other
suitable stand c, c, part of which is covered with wire gauze, a radiating cover d, d,
open at the bottom and converging towards an apex at the top, somewhat in the
shape of a bee hive or sugar loaf. This radiating cover may be varied in form to
a considerable extent so long as its principal distinguishing feature is retained,
which is that it is contracted or converges towards the apex where it is provided
with a short bent tube e, e, to carry off the fumes and other noxious products of com-
bustion of the gas. This tube passes through a hole in the sheet iron a*, a*, and
its end is open to the chimney or fire place.
In apartments not provided with a chimney or fire place the tube may be carried
out into the atmosphere through the window or through a wall or ceiling as may
be most convenient.
The aperture at the end of this tube may be contracted if necessary by the
insertion of a plug of cork or other material with a small hole bored through the
centre.
The radiating cover d, d, may be made of a variety of materials such as glass,
porcelain, terra cotta, or metal (the first being preferred), and it may be wholly or
partially transparent, and either plain, colored, or otherwise ornamented.
If desired a wire screen of suitable form may be placed over the stove to protect
it, and the top of such screen (if made flat) may be utilized to rest vessels upon
in order to keep them constantly warm.
Having now described the nature and object of our said Invention, together with
the manner in which the same is to be or may be performed or carried into prac-
tical effect, I wish it to be understood that I claim as my Invention the improved
construction of gas stoves, substantially as hereinbefore described, and illustrated

page_text: by the Drawing annexed, and more particularly the application to gas stoves of a
radiating cover converging towards an apex at the top, where it is furnished with
a tube for the purpose of carrying off the fumes and other noxious products of
combustion.
In witness whereof, I, the said John Sharpe Lawson, have hereunto set my
hand and seal, this Seventeenth day of Juno, in the year of our Lord One
thousand eight hundred and seventy nine.
JOHN S. LAWSON. (L.S.)