Improvements in Oil Lamps.
Year: 1891

page_text: Date of Application, 24th Feb., 1891
Complete Specification Left, 18th Nov., 1891-Accepted, 24th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Oil Lamps.
A communication from abroad by GIUSEPPE PIERONI, of 54, Via Federico Cesi,
Rome, in the Kingdom of Italy, Lamp Maker.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E. of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and Bank Street,
Manchester, both in the County of Lancaster, and 323 High Holborn in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this
invention to be as follows:-
The object of this invention is a lamp devised for light houses, but which could
equally well be used for street lighting in towns, and for domestic purposes.
The lamp is arranged for the purpose of burning oil without necessitating the
use of a lamp glass or chimney surrounding the flame which constitutes one of the
advantages of the new lamp from the point of economy of the illumination.
In the accompanying drawings;
Figure 1 is a view of the lamp partly in elevation and partly in section.
Figure 2 is a detail.
The lamp is composed of concentric cylinders t t between which the wick holder
is placed but which is not shown on the drawing. A rod a is fixed inside the
cylinder having at its upper end a piece and a disc c
The object of the piece b is to reduce the thickness of or spread the flame; its
diameter is slightly larger than that of the cylinder t.
The object of the disc c is to fix and determine the limit of the flame, it can be
solid or in the form of a ring as shown on Figure 2, where the interior opening has
an equal diameter to that of the piece b. The disc e thus constructed is of talc of
about one millimetre in thickness. The milled head d serves to raise and lower the
wick with the aid of a rack and pinion. The small tube o brings into the annular
space, comprised between the two cylinders and t¹, the oil which is contained in
a reservoir, the situation and the shape of which can be those found most suitable
for the purpose to which the lamp is to be applied. A. small cup g is placed
beneath the cylinders t and t¹ for the purpose of catching any drops of oil which
may escape from the cylinders. e is a fan or ventilator which is actuated by means
of a spring placed in the drum with the help of a suitable train of wheels, and
serves to produce a current of air in the interior of the cylinder t'. The lamp can
be made of any suitable dimensions either portable or fixed to the walls or sus-
pended as a decorating light. The oil is drawn by the wick to a constant level.
The steady and luminous flame assumes the shape of an oblate ellipsoid intersected
by a normal plane at its large axis. In fixed lamps for street lighting, light houses
and the like, the ventilating fan and the corresponding clockwork movement can
be dispensed with by introducing a constant current of air by means of a special
pipe having a feed valve. In place of oil alone, oil mixed with 10 per cent. of
benzine can be employed which increases by 50 per cent, the luminous power of the
lamp. If petroleum is used, the level of the liquid in the annular space between
the two cylinders and must first be lowered, and in the second place a capsule
must be added in the burner and the disc e dispensed with.
Dated th: 07th 1
fb1801
WM. P. THOMPSON & Co.,
Agents for the Applicant.

page_text: : staf
COMPLETE SPECIFICATION.
Improvements in Oil Lamps.
A. communication by GIUSEPPE PIERONI, of 54, Via Federico Cesi, Rome, in the
Kingdom of Italy, Lamp Maker.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E. of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool & 6 Bank Street,
Manchester, both in the County of Lancaster, & 323 High Holborn, in the
County of Middlesex, Civil Engineer, 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 object of this invention is a lamp devised for light houses, but which
could equally well be used for street lighting in towns, and for domestic
purposes.
The lamp is arranged for the purpose of burning oil without necessitating the
use of a lamp glass or chimney surrounding the Hame, which constitutes one of
the advantages of the new lamp from the point of economy of the illumination.
In the drawings accompanying the Provisional Specification
Figure 1 is a view of the lamp, partly in elevation and partly in section.
Figure 2 is a detail.
The lamp is composed of concentric cylinderst t, between which the wick
holder is placed which is. not shown on the drawing. A rod a is fixed inside the
cylinder, having at its upper end a piece and a disc c.
The object of the piece b is to reduce the thickness of or spread the flame; its
diameter is slightly larger than that of the cylinder t.
The object of the disc c is to fix and determine the limit of the flame, it can be
solid or in the form of a ring as shown on Figure 2, where the interior opening has
an equal. diameter to that of the piece b. The disc c thus constructed is of talc
of about one millimetre in thickness. The milled head d serves to raise and lower
the wick with the aid of a rack and pinion. The small tube o brings into the
annular space, comprised between the two cylinders t'and t¹, the oil which is
contained in a reservoir, the situation and the shape of which can be those found
most suitable for the purpose to which the lamp is to be applied. A small cup g
is placed beneath the cylinders t and for the purpose of catching any drops of
oil which may escape from the cylinders. is a fan or ventilator, which is
actuated by means of a spring placed in the drum with the help of a suitable train
of wheels, and serves to produce a current of air in the interior of the cylinder t¹.
The lamp can be made of any suitable dimensions, either portable or fixed to the
walls or suspended as a decorating light. The oil is drawn by the wick to a
constant level. The steady and luminous flame assumes the shape of an oblate
ellipsoid intersected by a normal plane at its large axis. In fixed lamps för street
lighting, light houses and the like, the ventilating fan and the corresponding
clockwork movement can be dispensed with by introducing a constant current of
air by means of a special pipe having a feed valve. In place of oil alone, 'oil
mixed with 10 per cent. of benzine can be employed, which increases, by 50 per cent.,
the luminous power of the lamp. In order to burn petroleum oil in the lamp it
will be sufficient to simply lower the level of the liquid in the annular space
between the two cylinders t and t¹, that is to say, in the case of petroleum, the
reservoir containing the oil must be placed as regards the cylinder ton-a-lower
level than is the case with other oils. The reservoir containing the petroleum
oil would be placed to stand about five centimetres below the top of cylinder t
whilst in the case of other oils the reservoirs would stand at about 5 millimetres
below the top of t.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
1. In an oil lamp without a glass tube or chimney, the combination of two
concentric cylinders with a central rod carrying a piece for the purpose of
reducing the thickness of the flame and a disc c for limiting the height and fixing
it, substantially as described.
C
2. In combination with an oil lamp of the kind described in the preceding claim,
a fan or ventilator such as operated by a spring and train of wheels and adapted
to produce a current of air in the interior of the central cylinder, substantially as
set forth.
3. In a lamp of the kind set forth in Claims 1 and 2, the herein described
modification for burning petroleum and consisting of the lowering of the level of
the liquid in the annular space between the two cylinders in the manner sub-
stantially as hereinbefore described.
4. The herein described arrangement of parts forming the improved lamp for
light houses, for street lighting, and for domestic purposes, substantially as
set forth.
Dated this 17th day of November 1891
WM. P. THOMPSON & Co.,
Agents for the Applicant.