IMPROVEMENTS IN GAS BURNERS FOR HEATING PURPOSES
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by the said Thomas Fletcher at the Office
of the Commissioners of Patents on the 5th August 1880.
THOMAS FLETCHER, F.C.S., of Warrington, in the County of Lancaster.
"IMPROVEMENTS IN GAS BURNERS FOR HEATING PURPOSES."
The object of this Invention is the construction of a gas burner which shall
produce a solid flame of high temperature for heating purposes, and be capable of
being readily cleaned.
In carrying out my. Invention I use a box or chamber covered with finely
perforated sheet metal (in place of the wire gauze hitherto employed in such
apparatus, and which is so liable to become choked up and difficult to clean), into
the interior of which box is introduced one end of a horizontal tube, open at both
ends, and at the other or free end of the same tube is placed a gas jet pointing
along the inside of the tube, the hole in the said jet for the gas supply being so
proportioned in size as to draw into the tube the correct proportion of air to mix
with the gas, and which mixture burns quietly on the top of the perforated plate
in a solid flame.
This construction of apparatus is capable of being readily cleaned, the perforated
plate being removable so as to be washed and brushed with the greatest case.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Fletcher in the Great Seal Patent Office on the 5th February
1881.
THOMAS FLETCHER, F.C.S., of Warrington, in the County of Lancaster.
"IMPROVEMENTS IN GAS-BURNERS FOR HEATING PURPOSES."
The object of this Invention is the construction of a gas burner, which shall
produce a solid flame of high temperature for heating purposes, and be capable of
being readily cleaned.
In the accompanying Drawing I illustrate a perspective view of a gas burner
constructed in accordance with my Invention, and I will now proceed to describe
the same by means of the letters of reference marked on the several parts.
I use a hollow box or chamber A (by preference cast iron) covered with finely
perforated sheet metal B in place of the wire gauze hitherto employed in such
apparatus, and which gauze is so liable to become choked up and so difficult to
clean.
Branching from the box A is a hollow horizontal arm or tube C, which opens
into such box A at its inner end, and at its outer end is fitted with a gas jet D,
the tail pipe E of which is capable of being connected to any convenient gas
supply. This gas jet D points along the inside of the hollow arm or tube, and
the hole formed in the said jet for the gas supply is so proportioned in size as
to draw into the tube D a correct proportion of air through the aperture G to
mix with the gas, forming an explosive mixture, and which explosive mixture
burns quietly and perfectly on the top of the perforated plate B in a solid flame.
H, H, are suitable projections or studs, forming a tripod stand or support for the
cooking or other vessel requiring to be heated upon the gas burner. This
construction of apparatus is capable of being readily cleaned, the perforated plate B
being made removable so as to be washed and brushed with the greatest ease.
Although I have only described one form of my improved gas burner, it will
be readily apparent that the improvements hereinbefore described are equally
applicable to other constructions of gas burners.
Having thus particularly described the nature of this my said Invention, together
with the best methods with which I am acquainted for carrying the same into
practical effect, I wish it to be distinctly understood that I claim,―
The general construction and arrangement of gas burner, and especially the use
and application of perforated sheet metal in combination with a horizontal tube
and mixing box or chamber, substantially as and for the purposes bereinbefore
described.
In witness whereof, I, the said Thomas Fletcher, have hereunto set my hand
and seal this 4th day of February in the year of our Lord 1881