IMPROVEMENTS IN GAS STOVES
Year: 1885

page_text: I CHARLES EDWARD HEARSON of N° 31 Coburg Road in the County of Surrey
Engineer do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN GAS STOVES" to be as follows:-
My invention consists of the improvements hereinafter described in gas stoves
whereby the gas passages leading to the burner are automatically opened and the
gas issuing from the burner ignited when a vessel is placed on the said stove
and the said passages are automatically closed and the supply of gas thereby cut off
from the burner when the vessel is removed from the stove a part of which
improvements is applicable to gas stoves in which the gas passages are opened and
closed by the ordinary means.
According to my said Invention I connect the gas inlet pipe of the stove to a
box or cap secured to the lower part of the stove which cap covers the lower open
end of a gas passage leading to the burner. Within the said cup is a valve (herein-
after termed the main valve) consisting of a plate supported by a spring which
valve is pressed by the spring against a seating formed around the lower end of
the said gas passage covered by the said cap the said passage being normally closed
by the said valve. The burner of the stove consists of a perforated hollow ring
communicating with a central tube by means of radial tubes and the said burņer is
mounted over the upper end of the aforesaid gas passage in such a manner that the
gas issuing therefrom shall pass through the central tube of the burner to the
perforated ring thereof together with atmospheric air which enters at the lower
part of the said central tube which is open. The upper part of the said central tube
is closed by a plug in which is a central hole. In the axis of the said tube a rod
(hereinafter termed the valve rod) is arranged the upper end of which passes
through and projects from the central hole in the plug closing the upper end of the
said tube and the lower end of which valve rod passes through the aforesaid gas
passage and rests on and is supported by the spring valve herein before described.
To the upper projecting end of the said rod a knob is secured the upper part of
which projects above the level of the part of the stove provided for the support of
vessels. Connected to the gas inlet pipe of the stove and between the main valve
and the gas supply is a "bye pass" or tube the exit end of which is in proximity
to that part of the burner from which the gas issues when the main valve is opened
The said bye pass is provided with a valve which admits of the gas passage in tho
said bye pass being opened or closed as required.

page_text: The method of using and the action of the arrangement herein before described
are as follows:-
When the stove is to be used the valve of the bye pass is opened and the gas
issuing therefrom is ignited. When a vessel is placed on the stove the weight of
the vessel depresses the valve rod and opens the main valve thus permitting gas to
pass to the ring burner on issuing from the perforations in which the gas is ignited
by contact with the bye pass flame. On removing the vessel from the stove the
spring of the main valve raises the said valve thereby closing the gas passage
-leading to the ring burner and raising the valve rod.
I prefer to form the upper surface of the knob on the valve rod curved or inclined
in order to prevent lateral strain on the said rod in case of a vessel being slidden
or pushed onto the stove and I prefer to form the aperture in the upper end of the
gas passage below the burner of a triangular or other angular form. In some cases
pass the lower end of the valve rod through a central circular opening in the
upper part of the gas passage and in such cases I prefer to form other openings for-
the passage of the gas around the said central opening.
Instead of arranging the valve rod so that it passes through the central tube of
the burner and rests directly on the valve a rod or rods may be otherwise arranged
and so connected to the valve that on depressing the said rod or rods the valve
will be opened.
Burners constructed as berein before described are applicable to ordinary gas
stoves.

page_text: I CHARLES EDWARD HEARSON of No 31 Coburg Road in the County of Surrey
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 statement:-
My invention consists of the improvements hereinafter described in gas stoves
whereby the gas passages leading to the burner are automatically opened and the
gas issuing from the burner ignited when a vessel is placed on the stove and
the said passages are automatically closed and the supply of gas thereby cut off
from the burner when the vessel is removed from the stove a part of which
improvements is applicable to gas stoves in which the gas passages are opened and
closed by the ordinary means.
According to my said Invention I connect the gas inlet pipe of the stove to a
box or cap secured to the lower part of the stove which cap covers the lower
open end of a gas passage leading to the burner. Within the said cap is a valve
(hereinafter termed the main valve) consisting of a plate supported by a spring
which valve is pressed by the spring against a seating formed around the lower
end of the gas passage covered by the said cap the said passage being normally
closed by the said valve. The burner of the stove consists of a perforated hollow
ring communicating with a central tube by means of radial tubes and the said
burner is mounted over the upper end of the aforesaid gas passage in such a
manner that the gas issuing therefrom shall pass through the central tube of the
burner to the perforated ring thereof together with atmospheric air which enters at
the lower part of the said central tube which is open. The top of the said central
tube is contracted and in the axis of the said tube a rod (hereinafter termed the
valve rod) is arranged the upper end of which passes through and projects from
the contracted top of the said tube and the lower end of which valve rod passes
through the aforesaid gas passage and rests on and is supported by the spring
valve hereinbefore described. To the upper projecting end of the said rod a knob
is secured the upper part of which projects above the level of the part of the stove
provided for the support of vessels. Connected to the gas inlet pipe of the stove
and between the main valve and the gas supply is a "bye pass or tube the exit
end of which is in proximity to that part of the burner from which the gas issues
when the main valve is opened. The said bye pass is provided with a screw valve
which admits of the gas passage in the said bye pass being opened or closed as
required.
Figure 1 of the accompanying drawings is an elevation and Figure 2 is a plan
of a gas stove constructed as herein before described and Figure 3 is a central
vertical section thereof Figures 4, 5, 6 and 7 represent details hereinafter referred to
The same letters and figures of reference indicate the same parts in each of the said
Figures of the drawing.
The outer parts of the stove consist of a base a a top frame b and a tubular
body c the latter being secured in place between flanges a¹, 61 formed on the said
base and top frame which are connected by means of screw bolts d, d and nuts one

page_text: eg
of which is shown at d¹ Figure 3 e is the box or cap secured to the lower part or
base a of the stove and f is the gas inlet pipe. The said parts c and f are shown
separately from the other parts of the stove in Figure 4 the cap f being shown in
plan is a tube screwed into a hole in the base a over the said box or cap e
which tube constitutes the gas passage leading to the burner. The said tube is
contracted at the upper end and the orifice in the said end is of triangular form as
shown in Figure 5 which is a plan of the said party shown separately. g' is a
flange formed around the tube g and g², g² are bosses formed on the said flange in
which bosses rods or pins g³, g³ are secured for supporting the burner hereinafter
described and retaining it in place. h is the main valve within the box or cap e
and i is the spring by which the said valve is pressed against the lower end of the
tube g. The said valve which is shown separately in plan in Figure 6 has a
depression in its upper side and a boss 2 on its underside with which boss the
upper part of the spring i is engaged. The parts of which the burner is composed
are marked j, k, l, and k being two castings which form the upper and lower
halves of the ring of the burner and the upper portion of the central tube and the
upper and lower halves of the radial tubes which communicate between the central
tube and the ring and 7 being a tube which is secured to the casting k and
constitutes the lower part of the central tube of the burner. The two parts j, kare
secured together by means of screws, j'. The bottom of the tube & rests on the
bosses g², g² formed on the flange g₁ of the gas passage g and is prevented from
shifting by means of the rods or pins g³, g³, m is the valve rod which passes through
the orifice in the contracted top je of the central tube of the burner and through the
axis of the said tube and the triangular orifice in the gas passage g and rests in
the depression ¹ in the valve . m is the knob at the upper end of the valve rod
which knob projects above the level of the tops of the ribs 63, 63 formed on the
top frame b of the stove and has a flange m³ formed on it which bears against
the underside of the said ribs and thus prevents the valve rod m from being
disconnected from the stove. The said valve rod is shown separately in elevation
in Figure 7. o is the bye pass and o¹ is the screw valve thereof.
The method of using the arrangement herein before described and its action are
us follows:-
When the stove is to be used the screw valve o' is opened and the gas issuing
from the bye pass o is ignited. When a vessel is placed on the stove the weight
of the vessel depresses the valve rod m and opens the main valve thus permitting
gas to pass out of those parts of the triangular orifice in the top of the gas passage y
which are not occupied by the valve rod m. The gas issuing from the said orifice
passes into the central tube of the burner causing a current of air to pass into
the said tube through the apertures between the bottom thereof and the flange gl
around the gas passage g which air mingles with the gas and the mixture of air
and gas passes to the ring burner on issuing from the perforations in which the
mixture is ignited by contact with the bye pass flame. On removing the vessel
from the stove the spring i of the main valve h raises the said valve and presses
against the bottom of the gas passage g leading to the burner thereby closing the
said gas passage and raising the valve rod m.
I prefer to form the upper surface of the knob m¹ on the valve rod m curved or
inclined in order to prevent lateral strain on the said rod in case of a vessel being
slidden or pushed onto the stove and I prefer to form the orifice in the upper end
of the gas passage below the burner (through which orifice the valve rod m
passes) of a triangular or other angular form. The said orifice may however be of
circular form in which case holes for the passage of gas must be forined around
the said orifice or the diameter of the said orifice inust be so much larger than the
diameter of the valve rod as to admit of the required passage of gas past the said
rod which must be arranged to work as nearly as possible in the centre of the
said orifice in order that the sectional area of every part of the annular gas passage
around the said rod may be equal and the supply of gas to all parts of the ring
burner uniform.

page_text: Instead of arranging the valve rod m so that it passes through the central tube
of the burner and rests directly on the valve has hereinbefore described a rod or
rods may be otherwise arranged and so connected to the valve that on depressing
the said rod or rods the valve will be opened.
Burners constructed as herein before described are applicable to ordinary gas
stoves.
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 as my Invention of "Improvements in gas stoves" is
First. The general combination and arrangement of parts constituting the
improved gas stove herein before described and illustrated in the accompanying
drawings.
Secondly. The means hereinbefore described for controlling the passage of gas
to the burner of a gas stove that is to say a valve consisting essentially of a plate
arranged over and aperture in one of the gas passages.
Thirdly. An atmospheric burner for a gas stove consisting essentially of a
central tube open at the lower part and communicating by means of radial tubes
at the upper part with a perforated hollow ring.
Fourthly. The arrangement herein before described for automatically admitting
a mixture of gas and air to the burner of a gas stove the said arrangement
consisting essentially of a rod passing through or working in the tube by which
the said mixture is conveyed to the burner the said rod being so mounted in the
stove and so connected with a valve as to cause the valve to be opened when a
vessel or article is placed on the top of the said stove.
Fifthly. Forming a valve seating and arranging a valve in connection therewith
in the gas passage at the lower part of or below that part of a gas stove into which
atmospheric air and gas pass on their way to the burner of the stove the said valve
seating and valve being formed substantially as hereinbefore described.
Sixthly. Actuating a valve arranged within a gas passage in a gas stove by
means of a rod passing through the aperture whence gas issues from the said
passage on its way to the burner.
Seventhly. The combination in a gas stove of a valve arranged and acting
substantially as hereinbefore described with means for actuating the said valve so
as to cause gas to be admitted to the burner when a vessel or article is placed on
the said stove.