Improvements in Lamps for use with Oll or Spirit and Operating by Incandescence.
Year: 1897

page_text: Date of Application, 2nd Feb., 1897
Complete Specification Left, 1st Nov., 1897-Accepted, 2nd Feb., 1898
PROVISIONAL SPECIFICATION.
Improvements in Lamps for use with Oll or Spirit and Operating by
Incandescence.
I, EDWARD ELLIS ABRAHAMSON, of 200, Dashwood House, New Broad Street,
in the City of London, Merchant, do hereby declare the nature of this invention
to be as followe:
This invention relates to lamps in which liquid hydrocarbon, such as petroleum,
or spirit, is rendered gaseous or vaporous and applied in connection with a Bunsen
burner and an incandescing mantle for illuminating purposes.
In a lamp constructed according to my invention, a chamber is arranged above
the oil reservoir or' container, the chamber and the reservoir being
connected together by means of tubes which enclose capillary wicks,
the latter extending and dipping into the liquid fuel contained in the reser-
voir. In proximity to the before mentioned wick-tube or tubes another tube or
other tubes is or are mounted, these also enclosing capillary wicks which extend
downwards to the liquid fuel. The latter tubes are in the form of inverted test
tubes provided with perforations at their closed or upper end. From these perfora-
tions inflammable vapour issues which when ignited heats the first mentioned tubo
and, at the same time, the heating chamber, whereupon the liquid supplied by
capillary force to the latter chamber becomes vapourised. The vapour passes from
the heating chamber by means of a suitable aperture to a Bunsen burner (such as
ordinarily employed in incandescent gas-lighting) furnished with an incandescing
mantle or cap, and may be ignited in the ordinary way. The burner may be con-
nected directly with the upper side of the heating chamber. The lamp may be
extinguished by extinguishing the heating flame, a cap operated from the outside
by means of a spindle being provided for the purpose.

page_text: and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
This invention refutes to lamps in which liquid hydrocarbon, such as petroleum,
or spirit, is rendered gaseous or vapourous and applied in connection with a Buusen
burner and an incandescing mantle for illuminating purposes.
Fig. 1 of the accompanying drawings illustrates in elevation and partial section
a lamp embodying my improvements. Figs. 2, 3 and 4 are respectively a vertical
section, a horizontal section and an elevation of one form of my improved vapouris-
ing apparatus. Fig. 5 is a view partly in elevation and partly in vertical section
of an alternative method of construction; Fig. 6 being a plan and Fig. 7 a side
view corresponding therewith.
In a lamp constructed according to my invention, a chamber a is arranged above
the oil reservoir or container b, the chamber and the reservoir being connected
together by means of a tube c, or by tubes, which enclose capillary wicks, the latter
extending and dipping into the liquid fuel contained in the reservoir. In
proximity to the wick-tube or tubes c, another tube d, or other tubes, is or are
mounted, these also enclosing capillary wicks which extend downwards into the
liquid fuel. The tube or tubes are in the form of inverted test-tubes and are
provided with perforations towards their closed or upper end. From these
perforations inflammable vapour issues which, when ignited, produces a flame
whereby the chamber a and tube c are heated; whereupon the liquid supplied by
capillary force to the chamber a becomes vapourised. The vapour passes from the
vapourising chamber through an aperture a¹ to a Bunsen burner B (such as ordi-
narily employed in incandescent gas-lighting) furnished with an incandescing
mantle or cap, and may be ignited in the ordinary way. The burner may be
connected directly with the heating chamber a by means of the screw-threaded
nozzle a. The lamp may be extinguished by extinguishing the heating flame:
a cap e, operated from the outside by means of a spindle f provided with a pinion fl
meshing with a rack attached to the cap e, serving the purpose of an extinguisher.
7 is a hole for inserting the igniting device.
In the construction illustrated by Figs. 5, 6 and 7, the vapourising chamber a
is situate at the crown of a pair of capillary wick-tubes : the tube being
provided with perforations for directing the heating flame against the walls of
the chamber a³.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I claim :-
1. In a lamp for use with oil or spirit and operating by incandescence, wherein
□ vapourising chamber is disposed above the fuel reservoir and connected there-
with by means of a capillary wick-tube, the employment of a small capillary
wick-tube or holder closed at its outer extremity and provided with a perforation
or perforations through which inflammable vapour issues in sufficient quantity to
support a flame, whereby the vapourising chamber is heated and the oil or spirit
rendered gaseous, substantially as herein described.
2. The improved lamp for use with oil or spirit and operating by incandescence,
constructed or operating substantially as described with reference to the accom-
panying drawings.
Dated this 1st day of November 1897.
For the Applicant,
G. G. M. HARDINGHAM,
Chartered Patent Agent, 191, Fleet Street, London, E.C.