IMPROVEMENTS IN GAS BURNERS
Year: 1865

page_text: LETTERS PATENT to Thomas Slocombe Hall, of Truro, in the County of
Cornwall, Wine. Merchant, for the Invention of "IMPROVEMENTS IN GAS
BURNERS."
Sealed the 22nd August 1865, and dated the 28th February 1865.
PROVISIONAL SPECIFICATION left by the said Thomas Slocombe Hall at
the Office of the Commissioners of Patents, with his Petition, on the
28th February 1865.
I, THOMAS SLOCOMBE HALL, of Truro, in the County of Cornwall, Wine
Merchant, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN GAS BURNERS," to be as follows:-
of
gas
My Invention of improvements in gas burners, relates, first, to that class
burner known as the argand burner, or burners in which the gas issues
from an annular aperture leaving a central space for the passage of air to
the flame to support combustion. The object of the Invention is to cause
a more perfect combustion of the gas, and consequent greater economy of
the gas, than in burners of the ordinary kind; one mode of effecting this
object is to adapt to the central aperture of the burner an adjustable batton'
or disc which will have the effect of regulating the supply of air to the flame
and of deflecting it in such a manner as to cause a proper combustion of

page_text: the gas. Air to the outside of the flame is made to pass up through a per-
forated metal plate on which rests the chimney or glass.
Another form of burner, and which is particularly applicable for producing
jets or pencils of flame for blowpipe purposes, consists in making a circular
aperture for the issue of the gas, and converting it into an annular aperture
by the addition of a central tube through which a jet of air is forced into
the centre of the flame in the same direction as the gas is issuing from the
annular opening. The jet to form the pencil of flame from the ignited gas
may either be given from the mouth of a workman through a suitable pipe,
or it may be produced by mechanical means by a blowing apparatus.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Slocombe Hall in the Great Seal Patent Office on
the 28th August 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
SLOCOMBE HALL, of Truro, in the County of Cornwall, Wine Merchant, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of February, in the year of our
Lord One thousand eight hundred and sixty-five, in the twenty-eighth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Thomas Slocombe Hall, Her special licence that I, the said Thomas
Slocombe Hall, my executors, administrators, and assigns, or such others as
I, the said Thomas Slocombe Hall, 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 "IMPROVE-
MENTS IN GAS BURNERS," upon the condition (amongst others) that I, the said
Thomas Slocombe Hall, my executors or administrators, by an instrument in
writing under my, or their, or one 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 Thomas Slocombe Hall, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-

page_text: formed, to be particularly described and ascertained in and by the following
statement, reference being had to the Drawings hereunto" annexed, and to the
letters and figures marked thereon (that is to say) :-
My Invention of "Improvements in Gas Burners" relates, first, to: that
class of gas burner known as the argand burner, or burners in which gas
issues from an annular aperture, or from an annular arrangement of holes
leaving a central space for the passage of air to the central part of the flame
to support combustion. The object of the Invention is to cause a more
perfect combustion of the gas, and consequently greater economy of the gas,
than in burners of the ordinary kind.
cause a proper
In the accompanying Drawings I have shewn various modes of effecting
this object, one of which is shewn in section at Fig. 1, and in plan at Fig. 2,
and consists in adapting to the central aperture of the burner an adjustable
button or disc a, which will have the effect of regulating the supply of air
to the flame, and of deflecting it in such a manner as to
combustion of the gas. Air to the outside of the flame is
up through a perforated metal plate b. The adjustable disc
mounted on the upper end of a vertical rod or pin d, which is provided at
its lower part with a toothed rack into which gears a pinion e, whereby the
rod and disc may be raised or lowered as required.
made to pass
or button a is
Fig. 3 is a modification in which the rod dis screwed, and is raised and
depressed by turning the milled head f below. Fig. 4 is a sectional view
shewing another modification in which the arm d is attached to a bar d',
which is inserted in a slot or socket in the piece g, in which it is capable
of being moved up or down and of being fixed in any desired position by
means of the set screw h. It will be seen that in order to prevent sudden
currents of air from affecting the flame, two discs or plates are employed; the
upper one a is provided, as shewn in the plan view, Fig. 2, with three pro-
jecting points which will keep it central in the opening; the second disc a' is
made of perforated metal and is placed below the regulating disc in order to
prevent the wind from injuriously affecting the currents of air. If preferred
the position of these discs may be reversed, that is, the perforated one a¹ may
be placed above the other a. If thought desirable the discs a and a¹ instead
of being made adjustable may be fixed at once into their proper places in
the burner, as shewn at Fig. 5.
Another form of burner, and which is particularly applicable for producing
jets or pencils of flame for blowpipe purposes, is shewn at Fig. 5, and consists
in making a circular aperture for the issue of the gas and converting it into
an annular aperture by the addition of a central tube through which a jet of

page_text: air is forced into the centre of the flame in the same direction as the gas is
issuing from the annular opening. In Fig. 6, i is the outer tube, which is
supplied with gas through the opening . The gas issues from the nozzle of
the tube i from the annular aperture where it is ignited. The jet to form
the pencil of flame from the ignited gas is produced by the internal jet j,
which may either be given from the mouth of a workman through a suitable
pipe k, or it may be produced by mechanical means by a blowing apparatus.
Having now described this Invention of Improvements in Gas Burners,
and having explained the manner of carrying the same into effect, I claim as
the Invention secured to me by Letters Patent as aforesaid, the mode herein
set forth of regulating the supply of air to the internal part of the flame
of burners.
In witness whereof, I, the said Thomas Slocombe Hall, have hereunto
set my hand and seal, the Twenty-first day of August, in the year of
our Lord One thousand eight hundred and sixty-five.
T. S. HALL. (L.B.)