Improvements relating to Atmospheric Gas Burners.
Year: 1892

page_text: Date of Application, 17th Dec., 1892
Complete Specification Left, 16th Oct., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements relating to Atmospheric Gas Burners.
I, JOHN SLAYTOR, of Hallgate, Doncaster, in the County of York, Gentleman,
do hereby declare the nature of this invention to be as follows:
My invention relates to atmospheric gas burners and has for its object to
prevent what is known as "lighting-back or "burning-down" in such burners.
In atmospheric burners as is well known, the gas, which issues from a nozzle
attached to the supply tube, is mixed with atmospheric air admitted through
orifices in a pipe or chamber surrounding the said nozzle. The mixture of gas and
air passes through a pipe and is burnt at the jets where complete combustion of the
gas is effected. It often happens that the gas instead of burning at the jets is
driven back by a draught or by other causes and burns at the nozzle near the
orifices where air is adınitted. Incomplete combustion of the gas then takes place,
and an injurious and evil smelling compound, acetylene, is liberated. This
"lighting-back" or burning down" often takes place when the burner is being
lighted or when the gas is turned low and is a source of great inconvenience and
sometimes of danger, especially when the burners are used in sick rooms.
According to my invention I secure a ring in the pipe which conveys the mixed
air and gas from the nozzle to the jets where the mixture is to be burnt. The said
ring fits the pipe tightly and is of suitable length and thickness. The end of the
ring which is nearest the gas nozzle may be made flat but the opposite end is
turned approximately conical externally thereby forming a projecting lip in the
chamber or tube. The said ring is preferably secured a short distance away from
the gas nozzle.
I sometimes interpose a screen of wire gauze a little further up the tube between
the ring and the gas jet so as to obtain greater security and to cause the burner to
right itself in case the gas lights below the said gauze as sometimes happens when
the burner is placed in a fire-place for example and there is a sudden down-draught
caused say by the opening or closing of a door.
"
"
By fitting my improved attachment to gas burners they are rendered much more
is avoided, an
"burn-down
or
safe as the liability of the flame to "light-back
economy of gas is moreover ensured since when the gas is alight at the nozzle
instead of at the jet the heat is nearly all wasted. Bunsen burners so fitted may be
turned low without danger of going out altogether.
My improved attachment which is very inexpensive can be easily fitted to any
existing atmospheric gas burners such as those used in gas fires, gas stoves, and the
like.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Atmospheric Gas Burners.
I, JOHN SLAYTOR, of Hallgate, Doncaster, in the County of York, Gentleman,
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 and has for its object to prevent
what is known as "lighting-back or "burning down" in such burners.
"

page_text: In atmospheric burners as is well known the gas, which issues from a nozzle
attached to the supply tube, is mixed with atmospheric air admitted through
orifices in a pipe or chamber surrounding the said nozzle. The mixture of gas and
air passes through a pipe and is burnt at the jets where complete combustion of
the gas is effected. It often happens that the gas instead of burning at the jets is
driven back by a draft or by other causes and burns at the nozzle near the orifices
where air is admitted. Incomplete combustion of the gas then takes place and an
injurious and evil smelling compound, acetylene, is liberated. This "lighting-back
or "burning down" often takes place when the burner is being lighted, or when
the gas is turned low, and is a source of great inconvenience and sometimes of
danger especially when the burners are used in sick rooms.
"
According to my invention I secure a ring in the pipe which conveys the mixed
air and gas from the nozzle to the jets where the mixture is to be burnt. The said
ring fits the pipe tightly and is of suitable length and thickness. The end of the
ring which is nearest the gas nozzle may be made flat but the opposite end in the
preferred form is turned approximately conical externally thereby forming a
projecting lip in the chamber or tube. The said ring is preferably secured a short
distance away from the gas nozzle.
I prefer to interpose a screen of wire gauze a little further up the tube between
the ring and the gas jet so as to afford an additional safeguard against "burning
down."
The accompanying drawing is a view partly sectional shewing by way of example
how my invention may be conveniently carried into practice.
A is the gas nozzle, B the mixing chamber where the gas issuing from the nozzle
is mixed with atmospheric air, and C is the pipe or tube which conveys the mixed
gas and air to the jets D where the mixture is to be burnt. Air is admitted to the
mixing chamber through holes B₁ which are preferably covered with wire
gauze B
E is the ring placed according to my invention in the pipe C between the mixing
chamber and the jets. The said ring is preferably turned conical externally as
shewn at E at the end which is farthest from the nozzle A and is fixed in the pipe
by screwing. Or said ring may be cast in one piece with the pipe or turned to fit
tightly therein and then driven in or it may be secured by other suitable means.
F is a screen of wire gauze placed between the ring E and the gas jets D so
that the mixed gas and air must pass through the gauze before coming to the jets,
an additional safe guard is thereby provided against the "burning down" of the
gas. The said gauze is conveniently made in the form of a thimble and may be
pushed into the pipe C, or it may be secured in position therein by other convenient
means.
The ring E may obviously be placed at any place in the pipe C but I prefer for
convenience in fitting to have it in the position shewn. I may provide two or more
rings in the pipe if desired.
"
Gas burners fitted with my improved attachment are thereby rendered safe as
the liability of the flame to "light-back or "burn-down is avoided, an economy
of gas is moreover ensured since when the gas is alight at the nozzle instead of at
the jet the heat is nearly all wasted and such lighting at the nozzle is avoided.
Bunsen burners so fitted may be turned low without danger of going out altogether.
My improved attachment which is very inexpensive can be easily fitted to or
connected with any existing atmospheric gas burners such as those used in gas fires,
gas stoves, and the like.
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 an atmospheric burner of a ring secured in the pipe
which conveys the mixed gas and air from the mixing chamber to the jets, with or

page_text: without a gauze screen in the space between the ring and the jets, substantially as,
and for the purpose, specified.
2. In the device claimed in the preceding claiming clause a ring having its end,
which is furthest from the mixing chamber, coned externally, substantially as, and
for the purpose, specified.
Dad his 10th do of Antalia 1902
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.