IMPROVEMENTS IN GAS BURNERS
Year: 1868

page_text: LETTERS PATENT to Alexander Melville Clark, of 53, Chancery Lane,
in the County of Middlesex, Patent Agent, for the Invention of
"IMPROVEMENTS IN GAS BURNERS."-A communication from abroad by
Joseph Paul Clovis, Storekeeper to the Department of the Imperial
Household and Fine Arts, of 13, Boulevart St. Martin, Paris.
Sealed the 15th June 1869, and dated the 23rd December 1868..
PROVISIONAL SPECIFICATION left by the said Alexander Melville
Clark at the Office of the Commissioners of Patents, with his
Petition, on the 23rd December 1868...
I, ALEXANDER MELVILLE CLARK, of 53, Chancery Lane, in the
County of Middlesex, Patent Agent, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN GAS BURNERS," to be as follows:-
This Invention relates to improvements in gas burners, the chief
features consisting, first, in the novel arrangement of the burner properly
so called, and secondly in the mode of supplying the gas thereto by
means of a central passage in connection with air passages at the lower
part of the burner. I am aware that attempts have before been made to

page_text: supply the gas at the centre of the burner without the aid of a forked
pipe, but the ring of metal forming the base of the burner and the tubes
supplying the air in such burners are liable to be expanded by the heat
and so produce escapes.
The annexed Drawing shows the arrangement of the improved burner
of this Invention, Figure 1 is an elevation of the burner complete, and
Figure 2 a central vertical section of same; Figure 3 is a side view,
and Figure 4 a plan of the burner proper detached; while Figure 5
shows a section of a porcelain burner arranged according to these
improvements. The same letters apply to the several Figures.
a, burner provided with a central air space and with a screwed stem b
bored for the passage of the gas. The burner is cast in a single piece,
and the part 6 is connected to cone a by arms c also made hollow and
uniting with the orifice in 6 for the admission of the gas; d, cap
enclosing the burner a to which it is fitted, this cap d is perforated at
top as seen in Figure.4, and receives the gas from arms c; e, socket
carrying the burner screwing on part b or it may be made in one one with
part a; f, ordinary mounting of the burner for supplying air thereto and
supporting the gallery g which holds the chimney h. In Figure 5 the
upper part of the burner is made of porcelain.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alexander Melville Clark in the Great Seal Patent
Office on the 22nd June 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
MELVILLE CLARK, of 53, Chancery Lane, in the County of Middlesex,
Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of December, in the
year of our Lord One thousand eight hundred and sixty-eight, in the
thirty-second year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Alexander Melville Clark,
Her special licence that I, the said Alexander Melville Clark, my execu-
tors, administrators, and assigns, or such others as I, the said Alexander
Melville Clark, my executors, administrators, and assigns, should

page_text: 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," a communication to me from abroad
by Joseph Paul Clovis, Storekeeper to the Department of the Imperial.
Household and Fine Arts, of 13, Boulevart St. Martin, Paris, upon the.
condition (amongst others) that I, the said Alexander Melville Clark,
my exccutors 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 Alexander Melville Clark, do
hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the Sheet of
Drawings hereunto annexed, and to the letters and figures marked
thereon (that is to say) :-
This Invention relates to improvements in gas burners, the chief
features consisting, first, in the novel arrangement of the burner, properly
so called; and secondly in the mode of supplying the gas thereto by
means of a central passage in connection with air passages at the lower
part of the burner. I am aware that attempts have before been made to
supply the gas at the centre of the burner without the aid of a forked
pipe, but the ring of metal forming the base of the burner and the tubes
supplying the air in such burners are liable to be expanded by the heat
and so produce escapes.
The annexed Drawing shows the arrangement of the improved burner
of this Invention, Figure 1 is an elevation of the burner complete, and
Figure 2 a central vertical section of same; Figure 3 is a side view, and.
Figure 4 a plan of the burner proper detached; while Figure 5 shows a
section of a porcelain burner arranged according to these improvements.
The same letters apply to the several Figures.
a, burner provided with a central air space and with a screwed stem b
bored for the passage of the gas. The burner is cast in a single piece,
and the part b is connected to cone a by arms c, also made hollow and

page_text: uniting with the orifice in 6 for the admission of the gas. d, cap
enclosing the burner a to which it is fitted, this cap d is perforated at
top, as seen in Figure 4, and receives the gas from arms c; e, socket
carrying the burner screwing on part b, or it may be made in one with
part af, ordinary mounting of the. burner through which the air is
supplied thereto and supporting the gallery g which holds the chimney h.
In Figure 5 the upper part of the burner is made of porcelain.
I may regulate the admission of air to the burner by means of a slide
or slides according to the supply of gas or the degree to which the inlet
passage of the supply cock is opened. In this manner I am enabled to
obtain a perfect and uniform combustion with a maximum of light at a
minimum expense.
Lastly with a view to prevent any shade being thrown by the cones
and also to permit of the burner being more easily cleaned I make thic
mounting of glass, crystal, porcelain, or other translucent substance.
These latter improvements are illustrated in Figures 6, 7, 8, and 9 of
the Drawings; Figure 6 shows an exterior view of the burner with the
slides opened for admitting a maximum amount of air for combustion;
Figure 7 is a central vertical section of the burner; while Figures 8
and 9 show separate views of the gallery with the registers in the
open and closed positions. The same reference letters apply to these
several Figures.
a, gas burner arranged in the manner before described and made
either of porcelain, metal, or other material, said burner being provided
with a stem 6 formed therewith terminating in an inlet pipe c for the
gas; d, chimney holder mounted on burner a and perforated at its
lower part for admitting air around the burner; f, gallery provided with
sliding dampers for regulating the admission of air to the burner for
combustion. This gallery is composed of three parts, viz., two cylinders
provided with openings, between which is placed a cylinder of wire gauze
for admitting air when the dampers are opened. The third part g
forming the valve or damper is also a cylinder having openings, which
part g is fitted to slide, so as to cover or uncover more or less the
openings in part f for regulating the admission of air to the burner.
h, burner support or mounting of glass or other translucent material
made in two parts turning the one on the other. The upper or movable
part of said support h is provided with three openings through which
pass the projections i of the valve before described. In this manner on

page_text: turning the upper part 7 in the one direction or the other the supply of
air to the burner may be partially or completely cut off by means of the
valve as desired.
Having described the nature of this Invention, and the manner of
performing the same, I declare that what I claim as the Invention
to be protected by the hercin-before in part recited Letters Patent is,―
The novel arrangement of gas burner herein-before described and
shown in the accompanying Drawings.
I also claim the mode of supplying the gas to the burner by a central
passage band arms c, as herein-before shown and described.
In witness whereof, I, the said Alexander Melvillo Clark, have
hereunto set my hand and scal, this Twenty-second day of Juno,
in the year of our Lord One thousand eight hundred and sixty-
nine.
Witness,
JAMES DAISH,
53, Chancery Lane,
London.
A. M. CLARK. (L.S.)