IMPROVEMENTS IN GAS BURNERS
Year: 1861

page_text: LETTERS PATENT to John Eaglesfield, of Devizes, in the County of Wilts,
Watchmaker, for the Invention of "IMPROVEMENTS IN GAS BURNERS."
PROVISIONAL SPECIFICATION left by the said John Eaglesfield at the
Office of the Commissioners of Patents, with his Petition, on the 29th
October 1861.
I, JOHN EAGLESFIELD, of Devizes, in the County of Wilts, Watchmaker,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN GAS
BURNERS," to be as follows:-
My improvements in gas burners consist in placing a triangular or other
shaped piece of iron or other material immediately above the apertures of an
ordinary fish-tail burner, so that the flame of gas as it issues is split in two
parts and passes upon each side of the bar of metal; the flame, however,
unites again some little distance above the splitting bar. The effect of thus
splitting the flame causes the flame to burn with little or no blue, and
therefore producing better combustion and giving a much greater light for the
quantity of gas consumed than would otherwise be the case. I raise one or
two little brackets from the burner, on which I fix the little triangular bar in a
borizontal position with an apex or angle downwards, so as to present a cutting
or splitting edge to the issue of the gas, the cutting edge being disposed some

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Eaglesfield in the Great Seal Patent Office on the
29th April 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
EAGLESFIELD, of Devizes, in the County of Wilts, Watchmaker, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of October, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Eaglesfield, Her special licence that I, the said John Eaglesfield,
my executors, administrators, and assigns, or such others as I, the said John
Eaglesfield, executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
GAS BURNERS," upon the condition (amongst others) that I, the said John
Eaglesfield, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Eaglesfield, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the fol-
lowing statement, reference being had to the Sheet of Drawings hereunto
annexed, and to the letters and figures marked thereon, that is to say :-
My improvements in gas burners consist in placing a triangular or other
shaped piece of iron or other material immediately above the apertures of an
ordinary fish-tail burner so that the flame of gas as it rises is split in two parts
and passes up on each side of the bar of metal, the flame, however, unites again
some little distance above the splitting bar. The effect of thus splitting the

page_text: flame causes it to burn with little or no blue, and therefore produces better
combustion and giving a much greater light for the quantity of gas consumed
than would otherwise be the case. I raise one or two little brackets from the
burner, on which I fix the triangular bar in a horizontal position with an apex
or angle downwards, so as to present a cutting or splitting edge to the issue of
the gas, the cutting edge being disposed some little distance above the hole or
holes of the burner, so that the jet or jets of gas impinge fairly against the
annexed Sheet of Drawings represents a side view of the
improved gas burner of my Invention, and Figure 2 an end view of same
partly in section, while Figures 3 and 4 represent the triangular bar separately
with its support.
b
a is an ordinary burner furnished with a screw thread for fixing it to a
branch or in other position, in which is screwed the nipple 6 as usual; a hollow
ring or support c is dropped on over the nipple and fitted in position on the
burner a, and may be screwed or otherwise secured thereto. This ring c
carries two arms or brackets d, d, one on either side serving as a support for a
triangular bar e of metal or other material, which is fitted in a horizontal
position thereon. The arms d, d, are disposed so as to support the horizontal
bar some little distance above the emission apertures in the nipple for the gas.
The bar e is disposed with its apex or angle downwards so as to present a
cutting or splitting edge to the gas, and so separates the flame into two parts
which pass upwards on each side of the bar, above which it again unites and
forms one flame. In this manner a constant supply of air is admitted to the
interior of the flame which permits of more perfect combustion of the gas, there
being no blue flame as is the case with ordinary fish-tail burners, which
consequently emits but an imperfect light, although consuming a large amount
of gas, whereas this improved burner will furnish double the amount of light
with the same quantity of gas.
The effect of fitting the horizontal splitting bar e to the burner also increases
the size of the jet about double the extent that it would be if the splitting bar
were absent.
The flame, after being separated by the bar, re-unites near the centre of the
jet, burning with a steady light of great brilliancy. The bar e may be squared
at the ends, and secured to the arms d, d, by pins or otherwise, or it may be
triangular thoughout and fitted into sockets of similar form carried by the
arms d, d.

page_text: Instead of the bar e being triangular it may be of other suitable form
adapted to the purpose required, but the form herein shewn is preferable.
Having described the nature of my Invention and the manner of performing
the same, I declare that what I claim as of my Invention, to be secured by
the herein-before in part recited Letters Patent is, the application of a
triangular or other shaped bar of metal or other suitable material immediately
above the orifices of a gas burner whereby to separate the flame and permit
of a constant supply of oxygen thereto, as and for the purposes herein-before
described.
In witness whereof, I, the said John Eaglesfield, have hereunto set my
hand and seal, this Twenty-eighth day of April, in the year of our
Lord One thousand eight hundred and sixty-two.
JOHN EAGLESFIELD. (L.S.)