Year: 1888

page_text: I, ROBERT DAVEY BOWMAN, of No. 1, Selston Villas, Derwent Grove, East Dulwich,
in the County of Surrey, Electrician, do hereby declare the nature of this invention to
be as follows:-
My invention relates to improvements in lamps; and is especially applicable to
lamps in which the coarser hydro-carbon oils are to be burnt.
According to
my invention, I provide one or more round wick burners. When
more than one is used, they are, preferably of different diameters, and arranged
concentrically.
The oil is led to the burner, or burners, along a tube or tubes leading from the
reservoir. The latter is fixed at about the same level as tho top of the burner.
A layer of wadding is placed in each burner, and above the layer, asbestos paper.
This asbestos paper is inserted in the burner according to the following method. I
take a long strip and cut the bottom edge in such a way that when the said strip shall
be wound tightly round the inner tube of a burner the bottom of the paper annulus
produced by such winding shall present a V-edge towards the wadding. The outer
tube is then placed over the paper.
The level of the oil supply is adjusted so that it shall be delivered in proper quantity
to the wadding, through which and the paper annulus it ascends by capilliary
attraction.
I sometimes, especially when applying a burner constructed as above described to a
lantern, use, according to my invention, the following device for regulating the flow
of oil from the reservoir into the supply tube.
I provide a syphon device consisting of a piece of cotton wick, or equivalent material,
which is laid over a drum provided with suitable gear by which it can be moved
upon its axis. One end of the wick is taken to the bottom of the reservoir and
the other hangs over the mouth of the supply tube. According to the relative

page_text: level of the end of wick over the supply tube will be the quantity of oil which
will syphon over the drum.
I use a bellied chimney with my improved burner, but the chimney is short as
compared with lamp chimneys as generally used and suspend, from its top, an
inner tube which, therefore, forms with the glass chimney, an annular space down
which a current of air will flow to escape up the said inner tube.
Dated this 1st day of February 1888.
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Lamps.
I, ROBERT DAVEY BOWMAN, late of No. 1, Selston Villas, Derwent Grove, but
now of No. 80, Lordship Lane, East Dulwich, in the County of Surrey, Electrician,
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:
My invention relates to improvements in lamps; and is especially applicable to
lamps in which the coarser hydro-carbon oils are to be burnt.
According to my invention I provide one or more round wick burners. When
more than one is used, they are, preferably, of different diameters and arranged
concentrically. The oil is led to the burner, or burners, along a tube, or tubes,
leading from the reservoir. The latter is fixed at about the same level as the top
of the burner.
A layer of wadding is placed in each burner, and above the layer, asbestos
paper. This asbestos paper is inserted in the burner according to the following
method. I take a long strip and cut the bottom edge in such a way that when
the said strip shall be wound tightly round the inner tube of a burner, the bottom
of the paper annulus produced by such winding shall present a V-edge towards
the wadding.
-
The level of the oil supply is adjusted so that it shall be delivered in proper
quantity to the wadding, through which and the paper annulus it ascends by
capillary attraction.
I sometimes, especially when applying a burner constructed as above described
to a lantern, use, according to my invention, the following device for regulating
the flow of oil from the reservoir into the supply tube.

page_text: I provide a syphon-device consisting of a piece of cotton wick, or equivalent
material, which is laid over a drum provided with suitable gear by which it can
be moved upon its axis. One end of the wick is taken to the bottom of the reservoir,
and the other hangs over the mouth of the supply tube. According to the relative
level of the end of wick over the supply tube will be the quantity of oil which will
syphon over the drum.
I use a bellied chimney with my improved burner, but the chimney is short as
compared with lamp chimneys as generally used; and suspend from its top an
inner tube which, therefore, forms with the glass chimney an annular space down
which a current of air will flow to escape up the said inner tube.
In order that my invention, and the means by which it is to be carried into
practicable effect, may be thoroughly understood, I will now describe the same in
detail, referring in so doing to the accompanying drawings which are to be taken
as part of this specification and read therewith.
Fig. 1. is a sectional side elevation of a single round wick burner lamp.
Fig. 2 is a part plan of the same.
Fig. 3 is a sectional side elevation of a duplex round wick burner lamp.
Fig. 4 is a part plan of the same.
Fig. 5 is a side elevation illustrating the operation of my syphon oil-supply
regulator.
Fig. 6 is a sectional plan of the plug of the cock thereof.
Referring to Figs. 1 and 2, A is the supply tube leading from the reservoir, and
delivering the oil into the wick tube B, at or near the closed bottom thereof.
Cis a layer of wadding occupying the wick tube for about a third of its depth.
D is the wick. It is made by winding a strip of asbestos paper round a mandril of
a suitable diameter. Before winding, the bottom edge of the strip is cut so that as the
process of winding proceeds the paper annulus shall present a bottom edge of a V-cross
section to the wadding. When the winding is completed the wick is inserted in the
wick tube B, by any suitable means.
E is the ordinary baffle provided for the purpose of deflecting the current of air
passing up the inner space e of the wick tube into the flame f.
G is an outer ring forming with the tube B a second air channel. The top g of
this ring is returned towards the axis of the wick tube for the purpose of deflecting
the air current into the flame.
The level of the oil supply is adjusted so that it shall be delivered in proper quantity
to the wadding, through which and the paper annulus or wick it ascends by capillary
attraction.
Referring to Figs. 3 and 4, I wish to point out that I do not confine myself to any
number of wick tubes. In the figures two are illustrated, but any desired number
may be used, all of them being connected at or near the bottom as shewn for the
purpose of securing an equal oil-supply to all.
Fig. 5 illustrates the construction and application of my improved syphon device
for regulating the flow of oil into the supply tube. I have selected a lantern for the
purpose of illustrating the application of this part of my invention although I wish it
to be distinctly understood that the improved device may be applied to liquid hydro-
carbon lighting apparatus other than lanterns.
His the oil reservoir, which will be, in the case of a lantern, preferably situated in
the top thereof.
I is a drum adapted to be rotated in suitable bearings provided for that purpose, by
any suitable device, e. g., a stud projecting through the side of the lantern. Across
this drum, I suspend a wick, the longer end i of which is always immersed in the oil
in the reservoir H, while the shorter end hangs down over, or within, the mouth of
the supply tube j. The wick is of cotton, or other suitable material adapted to allow
of the traverse through it of the oil from the reservoir H by capillary attraction, and
to so far act as a syphon. By rotating the drum I in either direction, and so varying
the relative levels of the ends of the wick-syphon as well as the degree of immersion

page_text: of the longer end i in the oil, the rate at which the oil is delivered into the supply
tubej can be regulated to a nicety.
The cock plug has two ways, one for night use, and a smaller one j³ to supply
oil to the burner during the day-time.
Figs. 1 and 3 show my improved lamps burning with ordinary shaped chimneys. I may
however according to my invention, and prefer to do so, use a short bellied chimney K,
as illustrated in Fig. 5, in combination with a ventilating tube & suspended within it.
The air flows down the annular space between the chimney and the tube, and up the
latter as indicated by the arrows.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I'declare that what I
claim is
1. The combination of an annular wick tube, an annulus of asbestos paper having
its bottom shaped with a V-edge, a layer of wadding in the said tube under and in
contact with the said annulus, and a combustible supply tube adapted to deliver into
the said annular wick tube at the bottom thereof, as set forth.
2. The combination of annular wick tubes each one provided with an annulus of
asbestos paper and a layer of wadding thereunder, and combustible supply tubes
adapted to deliver into the respective wick tubes, as set forth.
3. The combination with the supply of a liquid hydrocarbon lamp of a syphon
regulating device as set forth.
Dated this 20th dow of Ontahan 1000
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.