Improvements in Lamps for Burning Oil or other Liquids.
Year: 1886

page_text: Date of Application, 30th Apr., 1886.
Complete Left, 28th Feb., 1887.
Complete Accepted, 29th Mar., 1887.
Improvements in Lamps for Burning Oil or other Liquids.
We SAMUEL PRINCE CATTERSON and WILLIAM PRINCE CATTERSON of 34 Great
Dover Street in the County of Surrey, Lamp Manufacturers do hereby declare the
nature of this invention to be as follows:-
Our invention has reference more particularly to those lamps which have an annular
reservoir for the oil or liquid above the burner the oil being conveyed to the burner by
a tube fitted with a suitable valve or regulator, and which are open at the sides or
bottom or at both sides and bottom to allow of the free supply of air to the burner, the
air not being supplied from the upper part of the lamp as in railway carriage roof
lamps and other lamps in which the burner is enclosed by a glass.
The objects of our invention are to make provision for preventing the oil from
becoming unduly heated by the heat of the flame and products of combustion which
pass up the metal chimney around which the oil reservoir is placed and to provide
means whereby the lamp can be readily extinguished.
For the purpose of preventing the oil becoming unduly heated we interpose between
the oil reservoir and the metal chimney, which is outside the lamp chimney, an air
space or channel up which a current of air from outside the lamp will always flow
and we further interpose between the oil reservoir and the metal chimney a layer of
some suitable non-conducting or insulating material, such for example, as asbestos; or
instead of an air space or channel and a layer of non-conducting or insulating material
we form two concentric air spaces or channels.
In carrying out the invention we may form the air channel by fitting around the
metal chimney and upper part of the lamp a concentric tube or case and when a layer
of non-conducting material is used we may place it between the outside of this con-
centric tube or case and the inner periphery of the annular oil reservoir.
Or instead of the layer of non-conducting material being outside the concentric tube
or case it may be placed against the outside of the chimney and upper part of the lamp

page_text: where it will form the inner surface of the air channel. When we have two concentric
air spaces or channels we may form the first by fitting a tube or case concentrically
around the metal chimney and upper part of the lamp as above described, and the
second by fitting a similar but larger tube or case concentrically around the first.
For the purpose of extinguishing lamps we place a vertical pipe above the lamp
chimney and concentrically therewith, the lower end of this pipe being, say, 3 inches,
more or less, therefrom and we connect the upper end of this pipe with a pipe or
channel leading to any place where it can be conveniently blown into by means of a
portable tube or otherwise. It is then only necessary to blow into the pipe in order to
extinguish the lamp.
J. C. MEWBURN,
169. Fleet Street, London,
Agent.

page_text: CUALI LIIM NITOLICATION,
Improvements in Lamps for Burning Oil or other Liquids.
We SAMUEL PRINCE CATTERSON and WILLIAM PRINCE CATTERSON, of 34 Great
Dover Street, in the County of Surrey, Lamp 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 :-
Our invention has reference more particularly to those lamps which have an annular
reservoir for the oil or liquid above the burner the oil being conveyed to the burner by
a tube fitted with a suitable valve or regulator, and which are open at the sides or
bottom or at both sides and bottom to allow of the free supply of air to the burner,
the air not being supplied from the upper part of the lamp as in railway carriage roof
lamps and other lamps in which the burner is enclosed by a glass.
The objects of our invention are to make provision for preventing the oil from
becoming unduly heated by the heat of the flame and products of combustion which
pass up the metal chimney around which the oil reservoir is placed and to provide
means whereby the lamp can be readily extinguished.
For the purpose of preventing the oil becoming unduly heated we interpose between
the oil reservoir and the metal chimney, which is outside the lamp chimney, an air
space or channel up which a current of air from outside the lamp will always flow
and we further interpose between the oil reservoir and the metal chimney a layer of
some suitable non-conducting or insulating material such, for example, as asbestos: or
instead of an air space or channel and a layer of non-conducting or insulating
material we form two concentric air spaces or channels.
In carrying out the invention we may form the air channel by fitting around the
metal chimney and upper part of the lamp a concentric tube or case and when a layer
of non-conducting material is used we may place it between the outside of this
concentric tube or case and the inner periphery of the annular oil reservoir, or instead
of the layer of non-conducting material being outside the concentric tube or case it
may be placed against the outside of the chimney and upper part of the lamp where
it will form the inner surface of the air channel, but this arrangement is not to be
recommended. When we have two concentric air spaces or channels we may form the
first by fitting a tube or case concentrically around the metal chimney and upper part
of the lamp as above described, and the second by fitting a similar but larger tube or
case concentrically around the first.
For the purpose of extinguishing lamps we place a vertical pipe above the lamp
chimney and concentrically therewith, the lower end of this pipe being, say, three
inches, more or less, therefrom and we connect the upper end of this pipe with a pipe
or channel leading to any place where it can be conveniently blown into by means of
a portable tube or otherwise. It is then only necessary to blow into the pipe in order
to extinguish the lamp.
Figure 1 of the annexed drawings is an elevation and Figure 2 a vertical section of
a lamp in which our improvements are embodied.

page_text: a is the lamp burner and the glass chimney of same. C e is the metal chimney
which is opened out at bottom so as, if enamelled on the underside, to constituie a
reflector or, as we prefer, its lower edge is turned in so as to hold a porcelain reflector d.
e is the oil reservoir from which a tube f leads to the burner, this tube is fitted with a
valve or regulator atg which is preferably what is known as the Libra valve and is
described in the Specification of Hopkinson's Patent No. 594 of 1880. h is a tube or
rod corresponding to the tube but is used for appearance and uniformity only as it is
not intended to convey oil. is a tube or case concentric with the metal chimney
and of larger diameter so as to leave an annular air space or air channel between them.
Between the tube or case i and the inner wall of the reservoir e is another concentric
air space or channel. The two air spaces or channels are open at top and bottom, as
shown, but the bottom is fitted with a perforated plate or ring k. It will readily be
understood that while the lamp is burning, currents of air will continually flow up the
air spaces or channels and prevent the oil reservoir becoming unduly heated by the heat
of the flame and products of combustion which pass up the chimney e. Either of the said
spaces, and if so
preferably the inner one, may be filled with asbestos or other suitable
non-conducting or insulating material, or instead of filling one of the said spaces with
such material a layer of same may be placed around the metal chimney. The chimney
is shown as covered by an openwork cap m. To the centre of this is secured a vertical
pipe that communicates with a pipe o, o having a nozzle or nipple p to which a
portable or other tube can be fitted. By blowing into the pipe o, o through this tube
the lamp can be extinguished.
Figure 3 is an elevation showing a street lamp constructed according to our
invention but without the extinguishing arrangements. Parts corresponding with
those in Figures 1 and 2 are marked with the same letters of reference. represents
wire gauze at the upper part of the lamp to prevent downdraught. There should be
openings at the lower part of the lamp for the free inlet of air.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim, in
respect of lamps of the kind herein referred to, is:-
1. Constructing lamps with two concentric air spaces or channels between the metal
chimney and the air reservoir, substantially as and for the purpose set forth.
2. Constructing lamps with two concentric air spaces or channels and a layer of
non-conducting or insulating material between the metal chimney and the oil reservoir,
substantially as and for the purpose set forth.
3. Constructing lamps with a concentric air space or channel and a layer of non-
conducting or insulating material between the metal chimney and the oil reservoir,
substantially as and for the purpose set forth.
4. The arrangement described for enabling lamps to be readily extinguished.