Improvements in Oil Lamp Burners.
Year: 1891

page_text: Date of Application, 21st Aug., 1891
Complete Specification Left, 21st May, 1892-Accepted, 25th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Oil Lamp Burners.
We ALFRED HENRY GRIFFITHS, and EVERED AND COMPANY LIMITED,
both of Surrey Works, Smethwick near the City of Birmingham, Manufacturers
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the construction of the burners of oil
lamps, and more particularly to those having circular wicks, and consists in the
rearrangement of the perforated bottom of the burner.
In burners of this class, as hitherto made, this perforated bottom is carried
downwards from the body of the burner, in a somewhat conical form, and terminates
with a ring having an internal screw thread, which takes on to a screwthread
provided upon the exterior of the wick tube. In our invention, this screwthread is
dispensed with, and the said perforated bottom is carried upwards (instead of
downwards) into the interior of the cone, and terminates with a sleeve which tightly
slides on to the aforesaid wick tube.
Preferably the said perforated bottom is shaped somewhat of an inverted circular
groove form.
By these means the air space between the said perforated bottom and the flame
is much reduced, and consequently the air thus admitted is carried more directly on
to the said flame.
We find that by this arrangement the intensity of illumination is very much
increased, while this part of the burner is much more readily passed on to and
secured in position than those of present make.
Dated this 20th day of August 1891.
CHARLES T. POWELL,
Applicants' Agent.
COMPLETE SPECIFICATION.
Improvements in Oil Lamp Burners.
We ALFRED HENRY GRIFFITHS, and EVERED AND COMPANY LIMITED,
both of Surrey Works, Smethwick, near the City of Birmingham, Manufacturers,
do hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements in the construction of the burners of oil
lamps, and more particularly to those having circular wicks, and consists in the
rearrangement of the perforated bottom of the burner.
In burners of this class, as hitherto made, this perforated bottom is carried
downwards from the body of the burner, in a somewhat conical form, and terminates
with a ring having an internal screw thread, which takes on to a screwthread
provided upon the exterior of the wick tube. In our invention, this screwthread is
dispensed with, and the said perforated bottom is carried upwards (instead of
downwards) into the interior of the cone, and terminates with a sleeve which tightly
slides on to the aforesaid wick tube.
Preferably the said perforated bottom is shaped somewhat of an inverted circular
groove form.
In order to more fully describe and explain this our invention we have hereunto
TD 07

page_text: appended an illustrative sheet of drawings upon which are figures and letters of
reference and in which :-
Fig. 1, shows an elevation of a burner, the upper part of which is shown in section
in order to illustrate this our invention.
Fig. 2, is a detached detail sectional view of the perforated bottom.
Fig. 3, is a plan view of the said perforated bottom.
A, is the body of the burner which is preferably made detachable from the
gallery B, so that the latter together with the chimney holder C, and cone D, may
be raised and lowered from the said body by any of the now well known methods
to afford access to the wicks for lighting &c. In the burner illustrated the gallery
chimney holder and cone &c., are carried upon the leg E, and raised by the cam
arm F, acting upon the peg G, and operated by the key piece H. None of these
parts however concern this our invention and are only shown and described in order
to show the application and use of the said invention. J, is the perforated bottom,
(which hitherto has been made to take a downward direction) secured at K, to the
inside of the gallery, and rising upwards into the interior of the cone D, and there
encircling, the external wick tube L. Such termination may consist more or less of
a sleeve portion M. The precise contour of the said bottom J, may be somewhat
varied, its chief feature being, that it rises upwards into the cone towards and near
the top of the wick tube.
In cases where the gallery &c. is not made to rise and fall the sleeve portion at M,
is made to tightly fit the wick tube L, but where the said parts are made to rise
and fall, it is made to freely slide thereon.
By these means the air space between the said perforated bottom and the flame
is much reduced, and consequently the air thus admitted is carried more directly on
to the said flame.
We find that by this arrangement the intensity of illumination is very much
increased, while this part of the burner is much more readily passed into and
secured in position than those of present make.
Having now particularly described and ascertained the nature of this our said
invention, and in what manner the same is to be performed, we declare that
what we claim is :-
The combination in oil lamp burners, with the burner body, wick tubes, chimney
holder and cone, of an upward directed perforated bottom J, arranged and operating
substantially as described and illustrated.
TEL: 00h 1 L M 1902
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicants' Agent.