Year: 1886

page_text: Date of Application, 4th Nov., 1886.
Complete Left, 30th July, 1887.
Complete Accepted, 30th Aug., 1887.
orc
I, GEORGE RICHARD POSTLETHWAITE of the Firm of Arundale and Postlethwaite
of Staniforth Street Birmingham in the County of Warwick, Manufacturer, do hereby
declare the nature of this invention to be as follows:-
The main object of my invention is to keep cool, or reduce the flame temperature
of hydro carbon lamps, such as the Duplex, the Dual and the like, without materially
diminishing or lessening the illuminosity of the flame.
The greater portion of the heat given off from the flame or flames, is usually
absorbed or taken hold of, by the surrounding glass and metal parts, and from thence
by conduction, is conveyed to portions of the burner body which are in close proximity
to the oil reservoir; the consequence is, the oil becomes raised in temperature, and
explosions ensue.
•
Now my said invention is to remedy the over-heating referred to, by providing
certain means, which keep the flame and the surrounding parts cool or comparatively
cool.
I will describe my invention in connection with a dual burner, or a burner provided
with two wicks or wick tubes, and a single flame aperture.
At opposite inside parts of the cone of the burner, and at the ends of the wick tubes
or wicks and flame slit, I arrange two air channels or conduits, open at top (through
side holes in the cone) to the inside of the glass chimney, but closed to the inside of
the cone of the burner, while the bottom of the said channel is open to the body of
the burner, and through which open bottom cold air passes.
By providing the insides of burners with channels arranged opposite the ends of
the wicks and the cone slit, the cold air conducted therethrough from the body of the
burner is prevented from coming into direct contact with the sides of the flame; so
that the cold air which feeds combustion instead of being conducted through the cone
slit to the chimney part, has to pass up the side channels or inverted pockets, through
the side piercings in the cone, and into the chimney, which lessens the heat of the
flame and the heating of the surrounding parts, in consequence of the spread of the
flame being somewhat checked by the passage of air at its ends.

page_text: The air passages in the cone are arranged in a series one above another, with the
one series opposite the gaps or closed parts of the other series, in order to give an
uniform and constant stratum of air of a determinate breadth. Or a continuous slit
may be substituted for the holes if necessary.
To prevent the air cooling currents as described, from weakening or interfering
with the combustion currents which feed the flame, I arrange another series of holes
through the upper side of the outer ledge or the flange part of the lamp, upon which
the gallery arms are supported. These holes are arranged at opposite points of the
sides of the wick tubes and cone slit, that is, in a direction at right angles to the
piercings through which the cooling currents pass.
These last named series of holes admit air to the flats or sides of the flame, in a
more direct and more efficient manner than where air has to pass through the usual
piercings and baffle plate or plates.
The currents passing through the last named piercing described, into the body of
the burner, besides cooling the parts, tends to give an enlarged and perfect form to
the flame, and also prevents or tends to prevent the flame from coming into direct
contact with the chimney.
The cooling air channels may be formed by partly pressing inwards, portions of the
cone; or they may be made by independent trough pieces secured by soldering or
otherwise.
COMPLETE SPECIFICATION.
Improvements in Hydro-carbon Lamps.
I, GEORGE RICHARD POSTLETHWAITE of the firm of Arundale. and Postlethwaite of
Staniforth Street Birmingham, in the County of Warwick Manufacturer, 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:-
--
The main object of my invention is to keep cool, or reduce the flame temperature of
hydro-carbon lamps, such as the duplex, the Dual and the like, without materially
diminishing or lessening the illuminosity of the flame.
The greater portion of the heat given off from the flame or flames, is usually
absorbed or taken hold of, by the surrounding glass and metal parts, and from thence

page_text: by conduction, is conveyed to portions of the burner body, which are in close proximity
to the oil reservoir; the consequence is, the oil becomes raised in temperature, and
explosions thereby incurred.
Now my said invention is to remedy the over-heating referred to, by providing
certain means, which keep the flame and the surrounding parts cool, or comparatively
cool.
I will describe my invention in connection with a dual burner, or a burner provided
with two wicks or wick tubes, and a single flame aperture.
At opposite inside parts of the cone of the burner, and at the ends of the wick tubes
or wicks and flame-slit, I arrange two air slits, channels or conduits, open at top to
the inside of the glass chimney, but closed to the inside of the cone of the burner,
while the bottom of the said opposite slits or channels, are open to the body of the
burner, and through which openings, cold air passes.
By providing the insides of burners, with air slits or channels arranged opposite
the ends of the wicks, and cone slit, cold air is conducted and made to pass between
the ends of the flame and the inside of the chimney; so that the cold air which feeds
combustion instead of being conducted through the cone slit to the chimney part, has
to pass up the side inlets, through the side piercings in the cone, and into the chimney,
which lessens the heat of the flame and the heating of the surrounding parts, in
consequence of the spread of the flame being somewhat checked by the passage of air
between its ends, and the chimney as aforesaid.
The air passages in the cone are arranged in a series one above another, with the
one series opposite the gaps or closed parts of the other series, in order to give a
uniform and constant stratum of air of a determinate breadth.
A continuous slit may be substituted for the holes if necessary.
To prevent the air cooling currents as described, from weakening or interfering
with the combustion currents, which feed the flame, I arrange another series of holes
through the upper side of the outer ledge, or the flange part of the lamp upon which
the gallery arms are supported. These holes are arranged at opposite points of the
sides of the wick tubes and cone slit, that is, in a direction at right angles to the
piercings through which the cooling currents pass.
These last named series of holes admit air to the flats or sides of the flame, in a
more direct and more efficient manner, than where air has to pass through the usual
piercings and baffle plate or plates.
The currents passing through the last named piercing described, into the body of
the burner, besides cooling the parts, tend to give an enlarged and perfect form to the
flame, and also prevent or tend to prevent the flame from coming into direct contact
with the chimney.
I will now proceed to describe with reference to the accompanying drawing, the
manner in which the same is to be performed.
Figure 1 represents partly in front elevation, and partly in vertical section, the
burner part of a hydro-carbon lamp, provided with improvements made according to
my invention. Figure 2 represents the same, but with the section taken at right
angles to figure 1. Figure 3 represents a top side plan of the said burner, while
figure 4 shows a section of the cone part, which thus better exhibits the position of
the side slits, with respect to the ends of the burner slit. Figure 5 also represents
partly in longitudinal, vertical section, and partly in elevation, the burner part of a
lamp provided with air channels and side piercings instead of side slits.
The same letters of reference indicate corresponding parts in figures 1, 2, 3 and 4
of the drawing.
a is the burner body of a lamp, and a² is the burner cone; a³ is the gallery, and
a' is the base. b is the flame-slit in the cone a², and d, d, are the wick cases, and
e, e, are the wicks, which are arranged, to fall only just within a line struck from the
opposite inside edges of the flame-slit, as according to Letters Patent granted to me
bearing date the 23rd day of April 1885, and numbered 5022.
Opposite the ends of the wicks, or the wick cases, the burner cone a², is provided
with air slits ff, and overhanging wings 2, and it is through these slits, that cold air

page_text: is conducted and made to pass between the ends of the flame emitted through the
single flame-slit b, and the inside of the chimney, next to the flame; so that the cold
air which partially feeds combustion, instead of being conducted through the cone
slit, it passes up the opposite air slits f, f, situated in front of the ends of the wicks or
cases d, e.
The overhanging wing or shutter parts f³, prevents the direct upward passage of
the air, which would otherwise be carried to the flame-slit, instead of being conducted
through the air slits.
g are air passages or holes, passing vertically through the gallery or ledge part a³,
into the body part above the baffle plate h, and which holes or piercings are arranged
in a series in front of the opposite sides of the flame-slit and wicks; so that the said
piercings are disposed at right angles to the hooded air piercings f, f³, and are best
seen in figure 3.
These said piercings g, which pass into the burner body from the outside, and from
a point near the chimney, prevent the cooling currents as aforesaid, from weakening
or interfering with the combustion currents, which feed the flame.
In figure 5, a is the burner body, a² is the burner cone, a³ the outside gallery or
shoulder part upon which the gallery arms rest, is the flame-slit, and d are the
wick cases, f, f, are air channels opposite the ends of the wick tubes, and with air
holes through which air enters the chimney, for the purpose as herein before
described.
The air holes through the shoulder part a³, are arranged as in figure 3.
In applying my invention to burners provided with duplex flame slits, I arrange
the said air passages accordingly, as the nature and character of the burner demands.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is :—
First. The hooded air passages, slits or channels (,, arranged opposite the ends
of the flame or flames, or opposite the ends of the wick cases or wicks, substantially
as and for the purpose herein-described and set forth.
Secondly. Perforating the ledge or gallery part a³, with holes or piercings g,
disposed at points opposite the sides of the flame or wick tubes, and leading to the
upper portion of the burner part, above the baffle plate, substantially as and for the
purpose herein described and set forth.
Thirdly. The combination with a burner and burner body of hooded passages f,ƒ³,
and inlet piercings g, which are arranged and combined for the purposes as described
and set forth.
1
TL 1007