Improvements in or connected with Atmospheric Gas-burners.
Year: 1892

page_text: Date of Application, 30th Jan., 1892
Complete Specification Left, 20th Oct., 1892-Accepted, 26th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Atmospheric Gas-burners.
I, MICHAEL MARY BROPHY, of the firm of James Slater & Co., 251, High
Holborn, in the County of London, Engineers, do hereby declare the nature of
this invention to be as follows :-
My invention relates to atmospheric gas burners of the kind described in the
Specifications of former Letters Patent granted to me No. 14634 of 1888 and
No. 6662 of 1890, in which provision is made for automatically lowering the gas
when not required for use and so preventing waste.
of
With the arrangement described in the said Specifications a considerable quantity
gas is consumed even when the gas is lowered in order to prevent the gas from
igniting at the gas nozzle in the mixing chamber.
The object of my invention is to reduce to a minimum the quantity of gas burnt
when the burner is not in use, and to this end it consists in the provision of means
whereby a small pilot flame of pure gas will be left burning at the top of the
burner, thereby permitting the supply of gas to the mixing chamber to be completely
shut off.
In carrying out my invention I arrange the valve upon the rod having the conical
head to completely close the aperture through which the gas passes to the nozzle in
the mixing chamber, and I form through the said rod a passage communicating at
the lower end with the gas-supply and having at the upper end a small aperture
through which the gas for the pilot flame passes.
In order to permit of readily moving the said rod for cleaning purposes I
advantageously make it in two parts, one of which is provided with a male and the
other with a female cone so that, when the two cones are in contact, the gas cannot
escape between them. I sometimes find it advisable to make the cone upon the
movable rod separate from the rod and to connect it thereto by means of a spherical
or other joint, thereby allowing for a slight lateral movement of the said rod without
causing leakage between the cones.
Dated the 30th day of January 1809
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
i
COMPLETE SPECIFICATION.
Improvements in or connected with Atmospheric Gas-burners.
I, MICHAEL MARY BROPHY, of the firm of James Slater & Co., 251, High
Holborn, in the County of London, Engineers, 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 relates to atmospheric gas burners of the kind described in the
Specifications of former Letters Patent granted to me No. 14634 of 1888 and
No. 6662 of 1890, in which provision is made for automatically lowering the gas
when not required for use and so preventing waste.
With the arrangement described in the said Specifications a considerable quantity
of gas is consumed even when the gas is lowered in order to prevent the gas from
igniting at the gas nozzle in the mixing chamber.
The object of my invention is to reduce to a minimum the quantity of gas burnt
when the burner is not in use, and to this end it consists in the provision of means
...31

page_text: whereby a small pilot flame of pure gas will be left burning at the top of the
burner, thereby permitting the supply of gas to the mixing chamber to be completely
shut off.
In carrying out my invention I arrange upon a rod having a conical head
projecting above the surface of the hot-plate a valve adapted to completely close
the aperture through which the gas passes to the nozzle in the mixing chamber, and
I form through the said rod a passage communicating at the lower end with the
gas-supply and having at the upper end a small aperture through which the gas for
the pilot flame passes.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which
Figure 1 is a plan of the burner having my improvements arranged in conjunction
therewith; and
Figure 2 is a central vertical section of the same.
a is the body of the burner, the upper part 6 of which is in the form of a 1
removable cap provided with holes c, c at which the gas burns and having at its
lower end the chamber d communicating with the gas-supply pipe e and provided
with the nozzle f through which the gas enters the mixing chamber g. h is the valve
which is acted upon by a spring which normally tends to hold the said valve
against its seat to prevent the gas from passing from the chamber d to the nozzle f.
jis the rod connected to or formed integral with the valve h and provided with a
conical head which normally projects above the level of the bars of the hot-plate,
one of which is indicated by the letter in Figure 2. With this arrangement it
will be readily seen that when a saucepan or other vessel is pushed over the burner
the conical head will be depressed to open the valve h and allow the passage of 2
gas through the nozzle f; and that when the weight is again removed the spring
will lift the valve to cut off the supply of gas.
In order to provide a pilot flame for at once igniting the gas at the holes c, o I
form through the rod ja passage m through which pure gas can flow from the
chamber d to the outlet n immediately beneath the conical head k, the said conical
head serving to prevent the hole n from becoming stopped by dirt or grease.
To permit of readily moving the said rod with the cap 6 for cleaning purposes I
advantageously make it in two parts, the end of one part being provided with a
male cone o and the adjacent end of the other part with a female cone p; the said
two cones being so fitted that when they are in contact the gas cannot escape between a
them. In some cases I find it advisable to make the cone upon the removable part
of the rod separate from the rod and to connect it thereto by means of a spherical
joint q, thereby allowing for a slight lateral movement of the upper part of the said
rod without causing leakage of gas between the cones. As shewn in the drawing
the spherical joint q is composed of a ball formed on the top of the cone o and fitted
into a recess in the lower end of the upper part of the rod, the edges of the rod
around the ball being closed in as shewn to prevent the cone o from becoming
detached.
r is a wire gauze diaphragm (in one or two thicknesses) which I advantageously
arrange in the upper part of the chamber y so that the gas and air in passing
through it become more intimately mixed the said diaphragm also preventing back
lighting.
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. In an atmospheric gas burner the combination of a valve for completely cutting
off the supply of gas to the nozzle in the air mixing chamber and a rod connected
to the said valve and having at its upper end a conical head, a passage being formed
through the said rod for permitting a supply of pure gas to pass through the said
rod, all substantially as described.
2. An atmospheric gas burner of the kind referred to in the preceding claiming

page_text: clause having the upper part of the rod provided with a conical head and removable
from the lower part, and also having the perforated cap of the burner removable,
substantially as described.
3. The improvements connected with gas burners hereinbefore described and
illustrated in the accompanying drawing.
Dated the 19th day of October 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.