IMPROVEMENTS IN THOSE GAS BURNERS KNOWN AS VENTILATING SUN BURNERS
Year: 1858

page_text: LETTERS PATENT to James Mac Kenzie, Manager to William Strode, of
Saint Martin's-le-Grand, in the City of London, Gas Engineer, for the
PROVISIONAL SPECIFICATION left by the said James Mac Kenzie at.
the Office of the Commissioners of Patents, with his Petition, on the
18th December 1858.
I, JAMES MAC KENZIE, Manager to William Strode, of Saint Martin's-le-
Grand, in the City of London, Gas Engineer, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN THOSE GAS BURNERS KNOWN AS
VENTILATING SUN BURNERS," to be as follows:-
In fitting the ventilating sun burners as at present constructed, a shadow is
thrown, which, on many accounts, is objectionable; the object of my present
improvements is to remedy this defect.
My Invention consists in fitting in the sides of the internal cone or conical
shaped passage, as well as in the sides of the ventilating funnel, some transparent
material which will resist the heat generated by the burner, and not intercept
the passage of light, such as mica or tale...

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Mac Kenzie in the Great Seal Patent Office on
the 18th June 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
MAC KENZIE, Manager to William Strode, of Saint Martin's-le-Grand, in the
City of London, Gas Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of December, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said James Mac Kenzie, Her special licence that I, the said James
Mac Kenzie, my executors, administrators, and assigns, or such others
as I, the said James Mac Kenzie, 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 Inven-
tion for "IMPROVEMENTS IN THOSE GAS BURNERS KNOWN AS VENTILATING SUN
BURNERS," upon the condition (amongst others) that I, the said James Mac
Kenzie, my executors or administrators, by an instrument in writing under
my, 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 James Mac Kenzie, 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 thereof, reference being had to the Drawings hereunto
annexed, that is to say:-
My Invention relates to an improvement in ventilating gas burners known
as sun burners. These burners consist of a number of jets placed horizontally
under funnels or inverted cones or chimneys, of sheet iron or other suitable
material; these chimneys are generally two in number, but sometimes three
or more are used.
The inner pipe or chimney is furnished with a valve, adjusted for the
purpose of controlling the current of hot air and the products of combustion
of the gas, and by means of which a portion of the same is diverted from the

page_text: inner pipe or chimney, and made to pass through a grating placed between
the same and the outer pipe or chimney; the effect of this arrangement is to
make the gas jets burn and maintain themselves in a horizontal position.
Now, when it has been found necessary to fix these burners below the
ceiling of a room, the iron funnels, pipes, or chimneys, by intercepting the
light, bave caused a dark shadow on the ceiling, more or less extended,
according to the distance the burner projected below the ceiling. When the
exterior of the funnels or chimneys has been ornamented with cut glass or
other ornaments, the upper portion of the ornament has been thrown into
the shade.
Now my Invention is designed to remedy these defects, and consists in
perforating or forming apertures in part of the inner funnel, pipe, or chimney,
and also in part of the outer one, in order to allow the light to pass, and in
filling up the openings with talc, mica, or other suitable transparent material.
The shadow on the ceiling or walls will be prevented, and all parts of the
ceiling will be equally lighted. Any ornament to the chimneys will also be
lighted up.
In the accompanying Drawings, Figure 1 is an external elevation of a sun
burner. a, a, are the jets of flame; b is the inner and c the outer funnel or
chimney; d is the grating. Figure 2 is a plan, shewing the jets a, a, and
part of the grating; and Figures 3 and 4 are sectional, elevation, and bottom
view of the sun burner complete; e, e, e, are the apertures made in both inner
and outer chimneys or funnels filled in with talc; f is the valve, and g, the
gas supply pipe.
And having now described the nature the said Invention, and in what
manner the same is to be performed, I declare that I do not claim the
general arrangement of the sun burner; but I claim making openings or
apertures in the funnels or chimneys, and filling the same with mica, talc,
or other like suitable transparent material, for the purpose herein-before
described.
In witness whereof, I, the said James Mac Kenzie, have hereunto set
my hand and seal, this Eighteenth day of June, One thousand eight
hundred and fifty-nine
JAMES MACKENZIE. (L.S.)