Improvements in the Burners of Lamps Burning Light or Volatile Oils.
Year: 1888

page_text: Date of Application, 3rd Mar., 1888
Complete Specification Left, 16th Nov., 1888
RESERVE
Complete Specification Accepted, 21st Dec., 1898 ENVE COPY
PROVISIONAL DI BOLTIVATIO
Improvements in the Burners of Lamps Burning Light or
Volatile Oils.
I ALFRED HENRY GRIFFITHS Managing Director of Evered and Company Limited
of Surrey Works Smethwick in the County of Stafford Manufacturers do hereby
declare the nature of this Invention to be as follows:-
or volatile
My invention has reference to the burners of such lamps burning light
oils as have two flat parallel wicks and my said invention consists of the improvements
hereinafter described in the appliances by which the air for supporting combustion is
directed upon the flames.
In the said burners as commonly constructed the flames of the two wicks rise
through a broad slot in the dome cone or deflector or each flame passes through a
separate slot the two flames coalescing on emergence from the said slots. In making
burners according to my invention for lamps burning light or volatil oils I employ
two domes cones or deflectors of different sizes one situated within the other the said
domes being parallel or nearly parallel. In the inner dome 1 make two slots through
which slots the flames pass respectively. In the larger outer dome I make a broad
slot situated over the division between the slots in the inner dome. The flame of the
two wicks after passing through the slots in the inner dome coalesce and the compound
flame passos through the slot in the outer dome.
The two domes are connected together at their bottom edges. The outer dome near
its base is perforated with holes for the passage of air into the space between the two
domes and the sides of the inner dome are perforated with a series of holes through
which holes a portion of the air entering the inner dome from below passes through
the said inner dome into the space between it and the outer dome and is so deflected
by the said outer dome that it impinges upon the combined flame as it passes through
the slot in the outer dome. The air thus finally directed upon the flame is highly
heated as it passes through the holes in the inner dome and the result is great
luminosity in the flame of the lamp.
This 2nd day of March 1888

page_text: COMPLETE SPECIFICATION.
Improvements in the Burners of Lamps Burning Light or
Volatile Oils.
I ALFRED HENRY GRIFFITHS Managing Director of Evered and Company Limited
of Surrey Works Smethwick in the County of Stafford Manufacturers do hereby
declare the nature of my invention and in what manner the same is to be performed
-to-be-particularly described and ascertained in and by the following statement:-
My invention has reference to the burners of such lamps burning light or-volatile-
oils as have two flat parallel wicks; and my said invention consists of the improve-
ments hereinafter described in the appliances by which the air for supporting
combustion is directed upon the flames.
In the said burners as commonly constructed the flames of the two wicks rise
through a broad slot in the dome cone or deflector or each flame passes through a
separate slot. In making burners according to my invention for lamps burning light
or volatile oils I employ two domes cones or deflectors of different sizes one situated
within the other the said domes being parallel or nearly parallel. In the inner dome
I make two slots through which slots the flames pass respectively. In the larger outer
dome I make a broad slot situated over the division between the slots in the inner
dome. The flames of the two wicks after passing through the slots in the inner dome
coalesce and the compound flame passes through the slot in the outer dome. The two
domes are connected together at their bottom edges. The outer dome near its base is
perforated with holes for the passage of air into the space between the two domes and
the sides of the inner dome are perforated with a series of holes through which holes a
portion of the air entering the inner dome from below passes through the said inner dome
into the space between it and the outer dome and is so deflected by the said outer
dome that it impinges upon the combined flame as it passes through the slot in the
outer dome. The air thus finally directed upon the flame is highly heated as it passes
through the holes in the inner dome and the result is great luminosity in the flame of
the lamp.
Figure 1 of the accompanying Drawing represents in side elevation, partly in
vertical section, and Figure 2 in plan a two flat wick burner for lamps burning light
or volatile oil, the said burner being provided with two domes cones or deflectors
according to my invention.
a is the body of the burner and b, c are the flat parallel wick holders and wicks of
the burner; d is the outer dome or deflector and e is the inner dome or deflector, the
said domes d and e being of different sizes and arranged with respect to each other in
the manner best seen in Figure 1. The two domes are connected together at their
bottom edges as represented.
In the inner dome e are two slots ff through which the two flames from the flat
wicks b, c pass respectively; e² is the cross division or bar between the two slots in the
inner dome e. In the larger outer dome d is a broad slot g over the division or bar e³

page_text: between the two slots ff in the inner dome e. The flames from the two wicks b, c
after passing through the slots f,f in the dome e coalesce and the compound flame
passes through the slot g in the outer dome d.
Air enters the space between the two domes at the perforations near the base of
the outer dome and air also passes from below through perforations i, i in the sides of the
inner dome e into the space between the two domes e, d. The air in passing through
the perforations i is heated and when deflected by the dome d upon the compound
flame produces great luminosity therein.
e2
Figure 3 represents in side elevation partly in section and Figure 4 in plan, a
modified burner constructed according to my invention; Figure 5 is a cross section of
a portion of the burner. In this modified burner instead of using a complete inner
dome I use only a portion thereof, that is, I support and fix between the two wick
holders b, c and crossing the middle of the broad slot K in the domed the middle
cross bar or plate e² of the inner dome e represented in Figures 1 and 2 excepting that
the said middle cross bar or plate e² is broader than that marked e in Figures 1 and 2 and
has a slightly angular figure in cross section. The middle bar or plate e² Figures 3, 4
and 5 is higher than that of the corresponding part in the inner dome Figures 1 and 2
so that the distance between the top of the dome d and the detached bar or plate e² is
less. It will be seen by reference to Figures 3, 4 and 5 that the slot k in the dome d
is somewhat broader than that in the dome d Figures 1 and 2. Air is supplied to
the dome d Figures 3, 4 and 5 through side perforations as well as from below, the
said air being heated by the middle part 2 of the inner dome and the heated air is
deflected on to the compound flame passing through the broad slot. k.
Having now particularly described and ascertained the nature of my invention
and the manner in which the same is to be performned I declare that I
claim as my invention of "Improvements in the burners of lamps burning light or
volatile oils":-
First In a burner in which two flat parallel wicks are employed for the production
of a compound flame, the combination of two domes cones or deflectors of different
sizes one situated within the other substantially as and for the purposes hereinbefore
described and illustrated in Figures 1 and 2 of the accompanying Drawing.
Secondly-In a burner in which two flat parallel wicks are employed for the
production of a compound flame, the combination with a broad slot in the dome of
the burner of a middle cross heating bar or plate constituting a portion of an inner
dome substantially as hereinbefore described and illustrated in Figures 3, 4 and 5 of
the accompanying Drawing.
Dated the Thirteenth day of November 1888.