Improvements in or relating to Gas-burners.
Year: 1890

page_text: Date of Application, 11th Feb., 1890
Complete Specification Left, 10th Dec., 1890-Accepted, 10th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Gas-burners.
I, GEORGE LOUIS LAVENDER of Sutton Road, Walsall in the County of Stafford,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
These improvements apply to the regulating of atmospheric gas and other analogous
burners to effect economy in consumption of gas, particularly in case of such
burners as are required for intermittent heating. The said burner is designed so
as to partially shut off the supply of gas automatically when not required.
To effect this I introduce into a burner of ordinary form, a valve capable of
partially closing the orifice through which the gas passes. This valve is acted upon
by means of a spring and has a portion projecting through the top or side of the said
burner.
The spring's function is to partially close the said valve and to allow the minimum
supply of gas to pass through. When in this position the said projecting portion of
valve is caused to stand out a convenient distance. When an instrument or
substance to be heated is placed over the said burner, it is caused to press upon
the said projecting portion, force open the valve and admit the full supply of gas.
Again when the heating is accomplished and the weight of instrument or substance
is removed, the spring brings back the valve to its nearly closed position and the gas
is partially cut off.
I further provide a set screw which may be used if occasion require to overcome
the said spring and fix the valve open for full supply of gas independently of any
weight pressing upon the projecting piece of the valve.
Dated this 11th day of February 1890.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Gas-burners.
I, GEORGE LOUIS LAVENDER, Sutton Road, Walsall, in the County of Stafford,
Manufacturer, 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:-
This invention applies to the regulation of atmospheric or other gas burners and is
particularly designed for use where the gas is required for intermittent heating
purposes, as for heating or keeping hot a glue-pot, hot water cans, soldering irons and
for similar purposes. The invention will be best understood by reference to the
accompanying drawings in which
Figs. 1 to 3 show the invention in perhaps the simplest form as applied to an
ordinary gas burner, Figs. 4 to 6 showing its application to an annular or ring burner.
Figs. 1, 2 and 3 are all vertical sections of the burner, Fig. 4 is an elevation of the
annular burner, Fig. 5 is an inverted plan of the same, and Fig. 6 an enlarged detail
of the valve-operating mechanism.
A in Figs. 1, 2 and 3 represents an ordinary steatite or similar burner provided with
a slit A¹ or other suitable opening or openings for the passage of the gas or gas and
air to form the flame such opening or openings being preferably arranged to one side
of the centre so as not to interfere with the operation of the valve. B represents the
valve and B' a spindle or end projecting through the top of the burner, C is a spring
contained in the lower part of the burner and D a set-screw for fixing the valve if

page_text: required. B³ is a collar fitting in a diminished portion A² of the burner in which
however are provided small passages A³ (shown in the section Fig. 1") so as to allow
of the constant passage of gas past the collar B². The operation of this device is
as follows:
When the burner is not required for use the valve B closes up against the restricted
portion of A¹ of the burner so as nearly to prevent the passage of gas, enough only
being allowed to escape to maintain a small flame upon the burner. When the burner
is required for use the pot, can, soldering-iron or other article is placed above it, and
rests upon the spindle B₁ thus forcing it in, as shown in Fig. 3, the chief weight
of the body being supported, if required, upon any suitable framework: With the
valve in the position of Fig. 3, free passage of gas is allowed past the valve B and the
full flame is obtained so long as the spindle B¹ is kept in and the valve B thus kept
open. When however the vessel or body is removed the spring C bearing at one end
in the bottom of the burner and at the other against the collar B² forces up that
collar and with it the valve B thus closing it, so far as it is ever intended to
be closed.
By means of the set screw D the valve may be retained permanently opened or
permanently closed as required by screwing it against the valve stem.
In the form shown in Figs. 2 and 3 the spindle B' instead of being a fixture upon B
is loose in it and retained therein by a head over which a portion of the valve B
is so far closed that while allowing movement to the spindle B¹ it cannot fall out.
The reduced portion of the burner A2 of Fig. 1 is dispensed with but otherwise the
construction is the same as in Fig. 1. The difference in operation is simply
that whereas in Fig. the set-screw D when screwed up is resisted by the valve
stem on account of the latter being supported by the collar B2, reduced burner
portion A and fixed spindle B', in Figs. 2 and 3 the valve is not supported in the
manner described and the set screw when screwed in forces the whole stem to the
opposite side of the burner until the collar B2 touches the shell of the burner
the spindle B' accommodating this change of position by turning in its socket.
The object and operation of the arrangement shown in Figs. 4 to 6 is the same as
that already described, the mechanism being altered to suit the different shape and
arrangement of burner to which it is applied. A represents the burner ring from
which the gas or gas and air may escape through holes in the ordinary way, E are
supports upon which the vessel or object to be heated may be carried and F represent
the legs supporting the burner, G is the pipe conveying the gas and air or gas which
latter would usually enter at the nozzle H through a flexible tube, to the burner. I is
a little pipe or by-pass to provide a flame for lighting the main burner, it being
preferable in atmospheric burners that the valve when the weight is removed should
entirely cut off the passage of the gas. B is the valve and B' the lever which
operates it and which in this burner takes the place of the spindle B' in the burner
shown in Fig. 1. The lever B' is pivoted at K and at its inner end is jointed to an
arm L of the spindle M which passes through a support or bracket N and carries on
its other end the valve B. O is a spring one end of which is fixed to any suitable
part of the apparatus the other end bearing upon the lever B¹ in such a direction as to
close the valve B. The operation is as follows:-
When the pot or vessel is placed on the burner it rests upon supports E depressing
the end of the lever B¹ which normally lies above the level of the supports E which
lever turning upon its pivot K raises its other end and through the arm L turns the
spindle M and valve B. When the vessel is removed the lever end B' rises lowering
its other end and thus closing the valve B which now fits tightly over the end of the
inlet pipe P.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
1. The combination with a burner for heating purposes of a valve so arranged that
whan th
..

page_text: is thereby opened and when such vessel or object is removed it automatically closes
substantially as described.
2. The combination with a gas burner of a. valve such as B inside the said burner
but having a portion such as B¹ projecting through the burner substantially as and
for the purpose described and illustrated in Figures 1, 2 and 3 of the accompanying
drawings.
3. The combination with a gas burner for heating purposes of an internal valve such'
as B a projecting spindle B₁ and a spring such as C substantially as and for
the purpose described and illustrated in Figures 1, 2 and 3 of the accompanying
drawings.
4. In an atmospheric gas burner the combination with the inlet pipe P of a valve
such as B so arranged as to be opened when the vessel or article to be heated is placed
on the supports E and to automatically close when the said vessel or article is removed,
substantially as described and illustrated in Figures 4, 5 and 6 of the accompanying
drawings.
5. In an atmospheric gas burner the combination with the inlet pipe P of a valve
such as B spindle M arm L and lever B¹ the whole constructed and operating
substantially as and for the purpose described and illustrated in Figures 4, 5 and 6 of
the accompanying drawings.
Dated shin Osh a.. of Darah 1000
G. LOUIS
LAVENDER.
W. P. Thompson & Boult,
Agents for the Applicant.