A NEW OR IMPROVED GAS STOVE
Year: 1876

page_text: LETTERS PATENT to Joshua Gill, of Bridgnorth, in the County of Salop,
Manager of Gas Works, for the Invention of "A NEW OR IMPROVED GAS
STOVE."
PROVISIONAL SPECIFICATION left by the said Joshua Gill at the Office of
the Commissioners of Patents on the 20th December 1876.
JOSHUA GILL, of Bridgnorth, in the County of Salop, Manager of Gas Works.
"A NEW OR IMPROVED GAS STOVE,"
My Invention consists of a new or improved gas stove, the parts of which are
constructed and arranged in the manner herein-after described.
My said Invention is especially applicable to the heating of churches, chapels,
public buildings, and large apartments, but may also be applied to heating purposes
generally.
The body of the stove consists of a cast-iron box or frame, by preference of a
square or rectangular figure, and having within it a smaller box or frame, the inner
box or frame forming the stove proper, and the outer box or frame the case of the
stove. The space between the two boxes or frames constitutes a non-conducting
chamber ontirely surrounding the sides of the inner box or stove proper. This
chamber is filled, by preference, with some imperfect conductor of heat, such as sand,
plaster of Paris, or other earthy material.
In the middle of the bottom of the stove is an opening through which air passes
to the inner chamber of the stove, and the top of the stove is covered by a
perforated plate or lid, through which the hot air from the stove passes into the
apartment to be heated.
In the inner chamber of the stove is a horizontal circular burner provided with a
series of jets. To this burner a mixture of ordinary coal gas and air is supplied,
air entering the gas supply pipe by openings in it outside the stove. Suspended
from the under side of the perforated cover or lid of the stove is a perforated hori
zontal plate, the said plate being situated a short distance above the circular burner'

page_text: The jets of flame heat the said suspended plate which acts as a heat diffuser, and
also prevents any dust passing through the perforated cover of the stove from
choking the jets of the burner.
In using the stove described, it is placed by preference in the floor of the building
or apartment to be heated, the perforated cover being situated level with the said
floor. The outer case or box of the stove las on its exterior and near its top an
overhanging shoulder or flange, by means of which the stove is supported upon the
joists of the floor.
When the stove is placed in the floor of the building or apartment the non-
conducting chamber of the stove keeps the external box or case so cool that the
heating of the floor of the room is effectually prevented.
Instead of placing the stove in the floor of the building or apartment the said
stove may be supported on the floor by a stand.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joshua Gill in the Great Seal Patent Office on the 16th June 1877.
JOSHUA GILL, of Bridgnorth, in the County of Salop, Manager of Gas Works.
"A NEW OR IMPROVED GAS STOVE."
My Invention consists of a new or improved gas stove, the parts of which are
constructed and arranged in the manner herein-after described.
My said Invention is especially applicable to the heating of churches, chapels, S
public buildings, and large apartments, but may also be applied to heating purposes
generally.
The body of the stove consists of a cast-iron box or frame, by preference of a
square or rectangular figure, and having within it a smaller box or frame, the inner
box or frame forming the stove proper, and the outer box or frame the case of the
stove. The space between the two boxes or frames constitutes a non-conducting
chamber entirely surrounding the sides of the inner box or stove proper. This
chamber is filled, by preference, with some imperfect conductor of heat, such as
sand, plaster of Paris, or other earthy material.
In the middle of the bottom of the stove is an opening through which air passes
to the inner chamber of the stove, and the top of the stove is covered by a
perforated plate or lid, through which the hot air from the stove passes into the
apartment to be heated.
In the inner chainber of the stove is a horizontal circular burner provided with a
series of jets. To this burner a mixture of ordinary coal gas and air is supplied,
air entering the gas supply pipe by openings in it outside the stove. Suspended
from the under side of the perforated cover or lid of the stove is a perforated horì-
zontal plate, the said plate being situated a short distance above the circular burner.
The jets of flame heat the said suspended plate, which acts as a heat diffuser, and
also prevents any dust passing through the perforated cover of the stove from
choking the jets of the burner.
In using the stove described, it is placed by preference in the floor of the
building or apartment to be heated, the perforated cover being situated level with
the said floor. The outer case or box of the stove has on its exterior and near its
top an overhanging shoulder or flange, by means of which the stove is supported
upon the joists of the floor.
When the stove is placed in the floor of the building or apartment the non-
conducting chamber of the stove keeps the external box or case so cool that the
heating of the floor of the room is effectually prevented.
Instead of placing the stove in the floor of the building or apartment the said
stove may be supported on the floor by a stand.

page_text: I will now proceed to describe with reference to the accompanying Drawing the
manner in which my Invention may be perforined.
Figure 1 represents in perspective a gas stove constructed according to my
Invention; Figure 2 is a vertical section of the same placed in the floor of the
building or apartment to be heated.
Figure 3 is a plan of the stove with the lid or cover removed; and Figure 5 is a
plan of the under side of the lid or cover of the stove detached.
The same letters indicate the same parts in the several Figures in the Drawing.
a is the body of the stove, consisting of a square or rectangular box or case,
having within it a smaller box or frame b. The inner box or frame b forms the
stove proper, and the outer box a the case of the stove; the space c between the
two boxes or cases a, b, constitutes a non-conducting chamber, entirely surrounding
the sides of the inner box-or stove proper b. The said chamber e may be filled with
some imperfect conductor of heat, such as sand, plaster of Paris, or other earthy
material, but the said chamber need not be filled with an imperfect conductor of
heat, the said chamber in that case forming an air space or chamber between the
inner box or stove proper and the outer case of the stove. By means of the said
non-conducting chamber c the outer box or case a is kept cool. Air for the support
of the combustion of the gaseous mixture supplied to the stove enters the inner
box 6 by the opening & at the bottom of the stove. The top of the stove is covered
by the perforated plato or lid e through which the hot air and products of com-
bustion from the stove pass into the apartment to be heated. Suspended from the
under side of the said perforated lid or cover e is a perforated horizontal plate f
situated a short distance above the circular burner of the stove. The said plate fis
heated by the jets of flame from the burner, and the said plate serves as a heat
diffuser, and also prevents any dust passing through the perforated cover e from
choking the jets of the burner.
In the inner chamber of the stove is a horizontal circular burner g, provided
with a series of jets (see the plan, Figure 3), the said burner being supplied with a
mixture of ordinary coal gas and air; h is the gas supply pipe opening into the
larger pipe in connection with the burner g. The bulbous end of the pipe i is
perforated, and air enters at the perforations in the said bulbous end, and mixes
with the gas supplied by the gas supply pipe h.
Although I prefer to use in the stove a burner of the kind represented, burning a
mixture of coal gas and air, yet I do not limit myself thereto, as other kinds of
burners and other inflammable gas or vapour may be employed.
The stove is placed in the floor of the building or apartment in the manner repre-
sented in Figure 2, the perforated lid or cover e being situated level with the said
floor of the building or apartment. By means of the overhanging shoulder or
flange a² on the outer case of the stove the said stove may be supported upon the
joists of the floor. By an examination of Figure 2 it will be seen that the stove
arranged in the floor of the room or apartment is prevented from heating the said
floor by the non-conducting chamber c, the said chamber c keeping cool the external
box or case a of the stove which is in contact with the floor.
Although gas stoves constructed according to my Invention are especially fitted
for use in the floors of rooms or apartments, yet the said stoves may be supported
on a stand above the floor of the building or apartment. The said stand may be
constructed in various ways, and may be made ornamental.
Having now described the nature of my Invention, and the manner in which the
same is to be performed, I wish it to be understood that I claim as my Invention,
the new or improved gas stove herein-before described and illustrated in the
accompanying Drawing, that is to say, a gas stove consisting of an outer box or
case of a square or rectangular figure, by preference having within it a smaller box
or frame in which the gas burner is situated, the space between the said outer
box or case and the inner box or stove proper constituting a non-conducting
chamber, completely surrounding the sides of the said inner box or stove proper for
the purpose, and substantially as described and illustrated, also the combination with

page_text: the said stove of the perforated lid or cover in conjunction with the suspended plate
or heat diffuser and dust retainer, as described and illustrated.
In witness whereof, I, the said Joshua Gill, have hereunto set my hand
and seal, this Eleventh day of June, in the year of our Lord, One thousand
eight hundred and seventy-seven.