Year: 1886

page_text: Date of Application, 21st Apr., 1886..
Complete Left; 20th Jan., 1887.
Complete Accepted, 22nd Feb., 1887.
I, WILLIAM WALKER of 11 Bute Street Luton, in the County of Bedford, Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to kitchen or cooking-ranges and consists in constructing the
said ranges so that they can be used for cooking either by ordinary fuel or by gas, the
efficiency of the said ranges is increased and the combination of a gas cooking-stove.
with an ordinary range is effected.
The fire-bars, grate and boiler of my improved range are similar to those of an
ordinary range. The oven is formed by two casings, one within the other, with a
space between them. Between the said casings I form a flue, having its mouth in line
with the top of the fire and extending down the side of the oven nearest the fire, under the
bottom, up. the opposite side and round to the back of the oven from whence it passes
into the chimney. The said flue at the sides and back of the oven is narrow, but at
the bottom of the oven, the entire space between the casings is utilized to form part
of the flue, so that the heat passing through the said flue expands over the entire
surface of the bottom of the oven. The space between the casings on the sides and
back of the oven not occupied by the flue, are filled with suitable non-conducting
material, whereby the heat of the oven is retained. The bottom of the inner casing
of the oven I form of thin sheet iron so as to admit of the greatest possible amount of
heat being transmitted to the interior of the oven.
Or the Hue may be constructed so that the whole of the fire can be carried down
the back of the oven, beneath it, and into a flue at the back of the fire, and tlience to
the chimney, the flue to be so arranged that when the oven is not used the smoke can
be carried into the chimney direct.
Inside the oven of my improved range near the bottom and on two sides thereof I
fix suitable pipes having perforations forming rows of small jets or burners. The
said pipes are suitably connected to the gas supply so that a mixture of gas and air is
consumed by the said burners. On the top of the oven I arrange one or more ring-
shaped or other suitably formed burners, the said burners being covered with a top
similar to that of an ordinary range. The said top has openings over the said burners

page_text: These burners are
the said openings being closed by covers in the ordinary manner.
also connected to the gas supply so as to burn a mixture of gas and air.
The front of the oven is closed by a door having a hinged piece at its lower edge,
or a ventilator, which is opened when the oven is heated by gas and closed when it is
heated by ordinary fuel. The flue is also provided with suitable dampers for regulating
the heat and admitting or excluding air as desired.
Or the range may be so constructed that the burners within the oven are arranged
near the top of the oven and burn gas only, the cooking within the oven being done
by reflected heat; or the burners for heating the oven may be arranged beneath the
bottom of the said oven.
Either of the above-described arrangements for cooking by gas may be applied to a
range with or without the above-described improvements in the construction of the
oven.
It will thus be seen that my improved range forms a combination of a gas cooking-
stove with an ordinary range and may be used for cooking by means of ordinary fuel,
or by gas, or by both at one time.
T. N. PALMER & Co.,
For the Applicant.
I, WILLIAM WALKER of 11 Bute Street, Luton, in the County of Bedford, Engineer,
do hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following state-
iment, reference being had to the accompanying drawings forming a part of this
specification:
:-
My invention relates to improvements in kitchen or cooking-ranges, whereby the
said ranges can be used for cooking either by gas, or by ordinary fuel, the efficiency
of the said ranges is increased, and the combination of a gas cooking-stove with an
ordinary range is effected.
My invention consists in providing the range with burners for heating the oven,
said burners consuming a mixture of gas and air, and with gas rings arranged
between the top of the oven and the top of the range, or hot-plate, for boiling and other
purposes, and also in so constructing the range that while the oven can be heated from
without, by the fire, the radiation of heat from the oven is so reduced that it can be
heated by the gas burners within it, thus rendering it equally effective whether heated
by ordinary fuel or by gas.

page_text: Figure 1 is a plan of the top of my improved range with the top, or hot-plate,
removed.
Figure 2 is a vertical section of a portion of my improved range on the line of
figure 1.
Figure 3 is a longitudinal section of my improved range on the line yy of figure 2.
Like letters indicate like parts throughout the drawings.
The fire-bars, grate, and boiler of my improved range are similar to those of an
ordinary range.
The top, bottom and back of the oven, and the side of the oven farthest from the
fire is formed of a casing A within the casing of the range, a space being left
between the said casings. A transverse vertical plate B, extending from the top to the
bottom of the range, divides the space at the back of the oven into two flues Cand D,
a plate E dividing the flue D from the space at the farther side of the oven. A
baffle-plate G is arranged in the space below the oven, in line with the plate B and
divides the said space into two flues or passages H and I communicating by the
passage J around the forward end of the bafe-plate G. Extending obliquely across
the top of the oven from the fire to the flue C is formed a flue K, between the top of
the oven and the top-plate M. The whole of the space F and the space L between
the top of the oven and the top-plate M up to the level of the bottom of the gas
rings O, P, Q, and as far as the flue K are lagged with fire clay or other suitable non-
conducting material (as shown in figure 2) to prevent the radiation of heat from the
top and side of the oven. The inner side of the door of the oven is also lagged with
fire clay or other suitable material. The bottom of the oven is formed of thin sheet
iron so as to admit of the greatest possible amount of heat being transmitted to the
interior of the oven from the flues H, I, but the back of the oven is formed of a
stouter iron plate to diminish the radiation of heat therefrom.
.
Inside the oven of my improved range, near the bottom and on two sides thereof
I fix suitable pipes N having perforations forming rows of small jets or burners. The
said pipes are connected to the gas supply so that a mixture of gas and air is
consumed by the said burners. Between the top of the oven and the top-plate M of
the range, I arrange one or more ring-shaped or other suitably formed burners. The
said top has openings over the said burners, the said openings being closed by covers
in the ordinary manner. These burners are also connected to the gas supply so as to
burn a mixture of gas and air. In the drawings three such burners are shown,
lettered O, P, Q.
The front of the oven is closed by a door having at its lower edge, a hinged piece
or a ventilator of any ordinary construction, which is opened when the oven is being
heated by gas and closed when it is being heated by ordinary fuel. The flues are also
provided with suitable dampers for regulating the heat and admitting or excluding air
as desired. Also perforations are formed in the front of the range for the supply of
air to the gas-rings or burners in the space L.
The flame and products of combustion from the fire pass through flue K, down
flue C, under the bottom of the oven through flues H and I, and thence up flúe D to
the chimney, as shown by the arrows. A flue R. leading into the chimney may be
formed at the back of the boiler, the fire passing under the top-plate.around the
space R to the said flue, and the top-plate may have holes and covers over the
flues R and K. S is firebrick around the grate.
Instead of constructing and arranging the flues of the oven as above described, the
oven may have an inner casing on the side nearest the fire, with a space between it
and the plate T, similar to the space F. In this space between the oven and the fire I
form a flue, having its mouth in line with the top of the fire and extending down this
side of the oven, under the bottom thereof, up the opposite side and round to the back
of the oven from whence it passes into the chimney. The said flue at the sides and
back of the oven is narrow, but at the bottom of the oven, the entire space between

page_text: the casings is utilized to form part of the flue, so that the heat passing through the
said flue expands over the entire surface of the bottom of the oven.
The space
between the casings at the sides and back of the oven, not occupied by the flue, is
filled with fire-clay or other suitable non-conducting material, whereby the heat of the
oven is retained. In this case also I form the bottom of the oven of thin sheet iron,
for the purpose herein before mentioned. The top of the oven, up to the level of the
bottom of the gas rings, is also lagged with fire clay or other suitable non-conducting
material.
A flue is provided from the fire into the chimney direct, for use when the oven is
not required to be heated by the fire.
It will thus be seen that my improved range forms a combination of a gas cooking-
stove with an ordinary range and may be used for cooking by means of ordinary fuel,
or by gas, or by both at one time.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is :-
In a cooking-range, the combination of means whereby the said range can be used
for cooking by gas, or by ordinary fuel, or by both at one time, substantially as herein
set forth.
T. N. PALMER & Co.,
Agents for the Applicant.