IMPROVEMENTS IN GAS BURNERS
Year: 1865

page_text: LETTERS PATENT to John Scholl, of 41, Berwick Street, Soho, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN GAS
BURNERS."
Sealed the 1st December 1865, and dated the 20th June 1865.
PROVISIONAL SPECIFICATION left by the said John Scholl at the Office
of the Commissioners of Patents, with his Petition, on the 20th June
1865.
I, JOHN SCHOLL, of 41, Berwick Street, Soho, in the County of Middlesex,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN GAS
BURNERS," to be as follows:-
This Invention has for its object improvements in gas burners. In order to
increase the light obtained by burning gas with the ordinary flat flame burners
known as fish tail, and bat's-wing, and with other similar burners, I employ
a narrow and thin slip of metal (by preference platinum), and this I fix so as
to tand in the plane of the flame immediately above the burner, the metal
should be so thin that its edge may not materially interfere with the issue of
from the burner. This addition to a gas burner, will be found greatly
to increase the quantity of light given by burning a given measure of gas
through the burner. To argand and other ring burners I make a similar
addition, the strip of metal being then made into a ring and fixed immediately
within the circle of holes, the diameter of the thin metal ring being very
slightly less than that of the circle of holes.
the

page_text: In constructing fish tail, bat's-wing, and other similar gas burners I form
the top of the burner of thin sheet platinum, and I secure the top in its place.
by preference, by burnishing it down into a recess, the holes or slits are the
afterwards cut in the platinumin place of boring-them through the solid metal
as is usual. Ring gas burners may be made in a similar manner, a ring of
thin platinum being burnished into a recess to receive the circle of holes.
Burners thus constructed are more durable and give less trouble than those
of the ordinary.construction.
SPECIFICATION in pursuance, of the conditions of the Letters Patent, filed
by the said John Scholl in the Great Seal Patent Office on the 20th
December 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN SCHOLL,
of 41, Berwick Street, Soho, in the County of Middlesex,, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of June, in the year of our Lord One
thousand eight hundred and sixty-five, in the twenty-ninth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
John Scholl, Her special licence that I, the said John Scholl, my executors,
-administrators, and assigns, or such others as I, the said John Scholl, my
-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 Scholl, 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 Scholl, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in gas burners. In order to
increase the light obtained by burning gas with the ordinary flat flame burners

page_text: known as fish tail, and bat's-wing, and with other similar burners, I employ.a
narrow and thin strip of metal (by preference platinum), and this I fix so as to
stand in the plane of the flame immediately above the burner, the metal should
be so thin that its edge may not materially interfere with the issue of the gas
from the burner. This addition to a gas burner will be found greatly to
increase the quantity of light given by burning a given measure of gas through
the burner.
Figures 1 and 2 show the upper end or nozzle of a,bat's-wing or fish tail
burner with my improvement applied to it in the manner I prefer. a is the
nozzle of the burner; bis "a short tube of brass or other material made to fit
the nozzle; this tube is split on one side to enable it to pass readily on to the
nozzle and to embrace it firmly when there; c is a thin strip of platinum fixed
to the tube 6 by fitting it into two small notches, one on each side of the tube,
and then closing the notches upon it, by spreading the metal on one or both
sides of the notch, or the platinum may be fixed in any other convenient way.
In place of platinum other materials capable of resisting the action of the
flame may be employed.
Figures 3 and 4 show two views of the parts b.and separate from the
nozzle of the burner. For a bat's-wing burner the stripe should not be quite
central in order that it may come either just in front of or just behind the slit
from which the gas issues and not interfere with the issue of the gas. To argand
and other ring burners I make a similar addition, the strip of metal being then
made into a ring and fixed immediately within the circle of holes, the diameter
of the thin metal ring being very slightly less than that of the circle of holes.
Figure 5 shows a vertical section, and Figure 6 a plan of an argand burner
with my improvement applied to it in the manner I prefer. is the perforated
ring through which the gas issues; 6 is a ring of platinum or other material
so held as to stand immediately within the ring of holes ; c, c, are metal springs
rivetted to the ring, they are made to enter within the tubular part of the
burner so as to hold the ring 6 steadily and truly in its place.
The parts b
and are shewn separately at Figures 7.
In constructing fish tail, and other similar gas burners, I form the top of
the burner of thin sheet platinum, and I secure the top in its place, by pre-
ference, by burnishing it down into a recess, the holes or slits are then after-
wards cut in the platinum in place of boring them through the solid metal as
|is usual.
I prefer to make the nozzle of brass, it is tubular and open at the top, this
end is then turned in a lathe so as to make a small internal ledge all round,
on to this ledge a disc of platinum is then dropped, the disc being of such a

page_text: size as just to fit into the recess made for it, then a burnisher is applied to
the nozzle, on the edge of which the thickness has been reduced in making
-the recess, and this edge is rubbed down so as to secure the platinum disc in its
place. Afterwards by stamping tools the platinum is dished to bring the upper
surface to the usual form of a bat's-wing burner, and the holes are bored in it
as is usual. Ring gas burners may be made in a similar manner, a ring of
thin platinum being burnished into a recess to receive the circle of holes.
Burners thus constructed are more durable and give less trouble than those
of the ordinary construction.
In witness whereof, I, the said John Scholl, have hereunto set my hand
and seal, this Eighteenth day of December, in the year of our Lord
One thousand eight hundred and sixty-five.