Improvements in Hydrocarbon Lamps for Soldering or other Purposes.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Hydrocarbon Lamps for Soldering or other
Purposes.
A communication from GUSTAV BARTHEL, of 37°, Blasewitzer Strasse, Dresden,
Saxony, in the Empire of Germany, Analytical Chemist.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent 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 present invention relates to a hydrocarbon lamp for soldering heating or
other purposes. It presents this advantage over the arrangements hitherto in use,
that the increased pressure in the reservoir resulting from the initial heating and
subsequent burning of the combustible, forces the hydrocarbons into an evaporation
tube, extending nearly to the bottom of the reservoir and provided with a coil of
wire gauze or metal wires or rods in which the hydrocarbons are rapidly vaporized
without having time to be deposited or condensed.
A further advantage presented by this lamp is the construction of the tube of the
burner which tapers above and has perforated walls, an arrangement perfectly
securing the lamp against being extinguished by wind.
The accompanying drawings represent
Fig. 1 a vertical section of the lamp
Fig. 2 a cross section of the evaporation tube
Figs. 3-5 sections and views of the burner-tube.
The reservoir 1 is provided at the bottom with a screw and its cover 2 is so
shaped as to form an annular groove or depression surrounding the evaporation
tube 3, which receives the liquid required for heating the combustible. The
evaporation tube 3 reaching nearly to the bottom of the reservoir contains a coil 5
of wire gauze or metal-wires or rods. To the upper end of the evaporation tube 3
a casting or body 6 is joined, the bore 7 of which terminates in a fine nozzle like
aperture, and closed from the outside by a conically pointed spindle 10 passing
through a gland 8 and fitting into a corresponding conical seat at the head of the
bore. The burner tube is screwed on to the body 6.
In the burner tubes provided with longitudinal slits hitherto in use it was not
found possible to completely secure the lamp against being extinguished by wind-
in the present lamp this drawback is obviated by providing the burner tube 9 with
suitable holes 11 the size and number of which may be determined by practical
experiment and their distance apart diminishing in proportion to the tapering cross
section of the tube.
As will be seen from the drawing the burner-tube may be provided with holes
either throughout its entire length, or only at the ends. By means of such a
perforated burner the lamp is absolutely secured against being extinguished
by wind.
In using the lamp one commences by heating the evaporation tube 3 in the usual
manner by burning methylated spirit which has been poured into the recess 4. In
consequence of the pressure arising in the reservoir as the result of this heating and
afterwards of the burning of the lamp, the liquid which is to be evaporated is
distributed over the whole of the wire gauze 5 condensation of the vapours being
prevented as it remains in contact with the hot wire gauze until it passes out by the
nozzle. The exit of the gases can further be regulated by the spindle 10.
The arrangement described above of a coil of wire gauze in place of the suction-
wick hitherto in use renders the lamp capable of being used in any inclined position

page_text: in which it may be required, since the coil when the lamp is tilted prevents the liquid
hydrocarbon from being squirted out into the burner tube.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent and in what manner the
same is to be performed I declare that what I claim is :-
1. A wickless soldering lamp or hydrocarbon burner characterized by an
evaporation tube (3) reaching nearly to the bottom of the lamp and filled with a
coil (5) of wire gauze or equivalent into which tube through the pressure produced
in the reservoir (1) by the heating and subsequent burning of the lamp the liquid
hydrocarbon is forced and converted into vapour.
2. In the lamp characterized in the first claim a burner tube such as (9) tapering
above and provided with holes (11) whereby the lamp is secured against being
extinguished by wind.
3. The combination and arrangement of parts constituting the complete lamp
substantially as described and illustrated in the accompanying drawings.
Dated this 23rd day of October 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.