IMPROVEMENTS IN GAS BURNERS
Year: 1862

page_text: LETTERS PATENT to Edmund Francis Davis, of Tavistock House,.
Tavistock Square, in the County of Middlesex, for the Invention of
"IMPROVEMENTS IN GAS BURNERS."
PROVISIONAL SPECIFICATION left by the said Edmund Francis Davis
at the Office of the Commissioners of Patents, with his Petition,
on the 1st January 1862.
I, EDMUND FRANCIS DAVIS, of Tavistock House, Tavistock Square, in the
County of Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN GAS BURNERS," to be as follows:-
The object of this Invention is to cause the gas while passing into and
through the burner to become regulated and controlled with regard to its
pressure, to be at the same time purified, its illuminating power increased, and
its consumption economized. The lower part of the burner consists of a
receptacle containing charcoal; above the charcoal a perforated cover or disc
having its edge furnished with a screw thread is screwed down inside the
receptacle, which has a corresponding thread cut therein so as to form a cap
and force down the charcoal as may be required according to the pressure of
the gas. The upper part of the burner consists of a dome and a nipple
screwed thereon; the interior and upper portion of the dome being furnished
with a double layer of wire gauze, a similar duplicate layer being placed in
the lower portion of the burner beneath the charcoal. The dome is to be
screwed on to the lower part of the burner, and the whole is then ready to be

page_text: attached by a male screw at the bottom of the burner to the gas pipe. The
gas will then pass through the layers of gauze and through the charcoal and
perforated disc into the dome, and through the upper layers of gauze into the
nipple, becoming in its passage not only purified or rendered smokeless, and
increased in its illuminating properties, but regulated in its pressure, and its
consumption proportionably economized.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Edmund Francis Davis in the Great Seal Patent Office
on the 1st July 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, EDMUND
FRANCIS DAVIS, of Tavistock House, Tavistock Square, in the County of
Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of January, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto him, the
said Edmund Francis Davis, Her special license that he, the said Edmund
Francis Davis, his executors, administrators, and assigns, or such others
as he, the said Edmund Francis Davis, his 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
he, the said Edmund Francis Davis, his executors or administrators, by an
instrument in writing under his, 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 Edmund Francis Davis, 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:-
The object of this Invention is to cause the gas while passing into and
through the burner to become regulated and controlled with regard to its

page_text: pressure, to be at the same time purified, its illuminating power increased,
and its consumption economised. The lower part of the burner consists of a
receptacle containing charcoal, above the charcoal a perforated cover or disc
having its edge furnished with a screw thread (immediately below which is a
gauze wire to prevent the charcoal stopping up the perforation) is screwed
down inside the receptacle, which has a corresponding thread cut therein, so
as to form a cap and force down the charcoal as may be required, according
to the pressure of the gas. The upper part of the burner consists of a dome
and a nipple screwed thereon. The interior and upper portion of the dome
being furnished with a double layer of wire gauze, a similar duplicate layer
being placed in the lower portion of the burner beneath the charcoal. The
dome is to be screwed on the lower part of the burner, and the whole is
then ready to be attached by a male or female screw at the bottom of the
burner to the gas pipe. The gas will then pass through the layers of gauze
and through the charcoal and perforated disc into the dome, and through the
upper layers of gauze into the nipple, becoming in its passage not only purified
or rendered smokeless, and increased in its illuminating properties, but
regulated in its pressure, and its consumption proportionally economised.
In witness whereof, I, the said Edmund Francis Davis, has hereunto set
his hand and seal, the First day of July, in the year of our Lord One
thousand eight hundred and sixty-two.
EDMUND F. DAVIS. (L.S.)