IMPROVEMENTS IN LAMPS FOR BURNING MINERAL AND OTHER OILS
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by William Clark at the Office of
the Commissioners of Patents, with his Petition, on the 16th May
1866. A communication from abroad by Etienne Jammes, of 29,
Boulevard St. Martin, Paris, Merchant.
I, WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex,
Engineer and Patent Agent, do hereby declare the nature of the said Inven-
tion for "IMPROVEMENTS IN LAMPS FOR BURNING MINERAL AND OTHER OILS," to
be as follows:-
This Invention relates to improvements in lamps for burning mineral and
other oils. These lamps are constructed so as to obtain two ascending
currents of air, the one in the interior of the wick, and the other on its
outside, whereby to produce perfect combustion, and a more brilliant light.
These lamps are of simple construction, the only mechanism being the rack
for raising the wick, and they may be made of the most ornamental forms.
This Invention is illustrated in the accompanying Drawings, showing three-
different arrangements of the lamp.
Figure 1 shows a vertical section of an improved lamp, the form being that
of a common moderator lamp; Figure 2 shows a vertical elevation of a lamp
such as used for burning mineral oils with a flat wick; lastly, Figure 3 shows
a partial section of a similar lamp of smaller size with a circular burner.
The reference letters apply to all three Figures.
a, body of the lamp; b, reservoir for containing mineral oil; c, screw plug
closing the orifice through which the oil is introduced, and provided with an

page_text: opening for the passage of air; d, tube soldered to the upper part of the reser-
voir b; e, tube passing through the reservoir 6, and soldered to its upper part;
f, socket soldered to the end of a rack g, the position of which is regulated
from the outside by a stem h and pinion i; j, ring for securing the wick k to
the socket f; 1, top or cover of the lamp fitting on the upper part of the
reservoir; it is provided with a gallery m and holes n round its lower part;
o, metal cap resting on the gallery m, and forming the burner; p, cylindrical
glass chimney fitting in the gallery m'; r, foot of the lamp, closed at the
bottom by a covers; the part r is pierced with holes t throughout its cir-
cumference, serving to admit a current of air which passes up inside the
wick / through the tube e, and out by the chimney p, after having furnished
its oxygen for combustion. The second current enters at the orifices n, cir-
culates in chamber 6, thence passes through the cap o, and around the wick k
and flame to the chimney; u, metal ring for supporting a globe if desired.
In Figure 2 the arrangement is the same, with the exception of the wick
and chimney p² being flat.
These improved lamps possess the great advantage of producing in a given
time and with the same quantity of oil a much more brilliant light, and a
larger flame than is obtained in ordinary mineral oil lamps, while the con-
tinuous double current of air keeps the parts adjacent to the flame cool, and
prevents all risk of explosion.
This improved system also permits of mineral oils being burnt with
cylindrical wicks and straight chimneys.