IMPROVEMENTS IN THE COMBUSTION OF GAS
Year: 1845

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
LESLIE, of Conduit Street, Hanover Square, in the County of Middlesex, Tailor
to Her Majesty, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Fourth day of December, in the ninth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
John Leslie, my exors, admors, and assigns, Her especial licence, full power,
sole privilege and authority, that I, the said John Leslie, my exors, adñiors,
and assigns, or such others as I, the said John Leslie, my exors, admors, or
assigns, should at any time agree with, and no others, from time to time
and at all times during the term of years therein expressed, should and
lawfully might make, use, exercise, and vend, within England, Wales, and
the Town of Berwick-upon-Tweed, my Invention of "IMPROVEMENTS IN THE
COMBUSTION OF GAS;" in which said Letters Patent is contained a proviso that
I, the said John Leslie, should cause a particular description of the nature of
my said Invention, and in what manner the same is to be performed; to be
inrolled in Her said Majesty's High Court of Chancery within six calendar
months next and immediately after the date of the said in part recited Letters
Patent, as in and by the same, reference being thereunto had, will more fully.
and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
John Leslie, do hereby declare that the nature of my said Invention, and the

page_text: manner in which the same is to be performed; are fully described and ascer-
tained in and by the following statement thereof, reference being had to the
Drawings hereunto annexed, and to the figures and letters marked thereon,
that is to say
My Invention consists of a peculiar arrangement of gas burner, which from
its construction will afford a much larger supply of atmospheric air at the
point of ignition of the gas than former methods, by which the combustion of
gas will be greatly improved. I make the burner of a series of tubes of metal,
glass, porcelain, china, or other suitable material, rising out of the supply tube,
and forming by a succession of these tubes a circle or other figure, each tube
being distinct from the other, but at the point where combustion is to take place
they touch, or nearly touch, each other. The gas from each separate tube
being ignited the flames unite and assume a single, circular, or other form of
hollow flame. The Drawing shows a vertical section and a plan of a gas
burner constructed according to the Invention, a being the supply pipe, b, b,
the tubes combining together to form a circular flame at c, and d is the glass
chimney of the shape I prefer.
Having thus described the nature of my Invention, I would have it under-
stood that I do not confine myself to the details of the burner shown, so long
as the peculiar construction of gas burners is retained; but what I claim is, the
constructing and applying gas burners as herein described, whereby the com-
bustion of gas will be improved.
In witness whereof, I, the said John Leslie, have hereunto set my hand
One thousand
eight hundred and forty-six.
JOHN (L.S.) LESLIE.
AND BE IT REMEMBERED, that on the First day of June, in the year of
our Lord 1846, the aforesaid John Leslie came before our said Lady the
Queen in Her Chancery, and acknowledged the Specification aforesaid, and
all and every thing therein contained and specified, in form above written.
And also the Specification aforesaid was stamped according to the tenor of the
Statute made for that purpose.