AN IMPROVEMENT IN APPA- RATUS FOR BURNING GAS
Year: 1860

page_text: LETTERS PATENT to John Froggatt, junior, of Lenton, in the County of
Nottingham, Doubler, for the Invention of "AN IMPROVEMENT IN APPA-
RATUS FOR BURNING GAS."
Sealed the 30th April 1861, and dated the 6th November 1860.
PROVISIONAL SPECIFICATION left by the said John Froggatt at the
Office of the Commissioners of Patents, with his Petition, on the 6th
November 1860.
I, JOHN FROGGATT, junior, of Lenton, in the County of Nottingham, Doubler,
do hereby declare the nature of the said Invention of "AN IMPROVEMENT
IN APPARATUS FOR BURNING GAS," to be as follows:-
My improvement consists in a novel and economical arrangement of
"burner," to be employed for the particular purpose of using ordinary gas for
heating or for singeing yarns, lace, or textile fabrics, or for other purposes
wherein the flame is required for heat or burning in contradistinction to the
general purposes of illumination, it being well known that for the former use the
"blue flame" is most desirable, whereas for illuminating the "white flame " is
preferred. This apparatus is designed for the purpose of producing the
required clear blue jet or flame of intense heat by the more perfect supply
of air for the combustion of the gas, and by which means the smoke and other
impurities evolved are perfectly consumed. The improved apparatus or burner
consists of a tube having a somewhat larger aperture at the point of ignition

page_text: than usual, and immediately below and around the burner at a suitable distance
crifices, holes, or slots are formed in the sides of the tube or burner by which
the atmospheric air enters within the tube, the peculiar and precise position of
the openings being designed to insure the most effectual consumption of the
gas and all deleterious impurities and thereby causing the flame to be perfectly
smokeless, which (combined with intense heat) is the chief requisite for such
operations
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Froggatt in the Great Seal Patent Office on the 6th
May 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
FROGGATT, junior, of Lenton, in the County of Nottingham, Doubler, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of November, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-fourth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the
said John Froggatt, junior, Her especial license that I, the said John Froggatt,
junior, my executors, administrators, and assigns, or such others as I, the
said John Froggatt, junior, 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 "AN IM-
PROVEMENT IN APPARATUS FOR BURNING GAS," upon the condition, amongst
others, that I, the said John Froggatt, junior, by an instrument in writing
under my hand and seal, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be per-
formed, 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 Froggatt, junior, 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
following statement, that is to say:-
My improvement consists in a novel and economical arrangement of burner

page_text: to be employed for the particular purpose of using ordinary gas for heating or
for singeing yarns, lace, or textile fabrics, or for other purposes wherein the flame
is required for heat or burning in contradistinction to the general purposes of
illumination, it being well known that for the former use the "blue flame "
is most desirable, whereas for illuminating the "white flame" is preferred.
This apparatus is designed for the purpose of producing the required clear blue
jet or flame of intense heat by the more perfect supply of air for the combustion
of gas, and by which means the smoke and other impurities evolved are per-
fectly consumed. The improved apparatus or burner consists of a tube having
a somewhat larger aperture (of any suitable form) at the point of ignition
than usual, and immediately below and around the burner at a suitable distance
orifices, holes, or slots, are formed in the sides of the tube or burner by
which the atmospheric air enters within the tube, the peculiar and precise
position of the openings being designed to ensure the most effectual con-
sumption of the gas and all deleterious impurities, and thereby causing the
flame to be perfectly smokeless, which combined with intense heat is the
chief requisite for such operations, I would also remark that the orifice at
the point of ignition may be divided so as to produce two flames close to
one another.
In witness whereof, I, the said John Froggatt, junior, have hereunto
set my hand and seal, this Fourth day of May, in the year of
our Lord One thousand eight hundred and sixty-one.
JOHN FROGGATT, JUN. (L.S.)