Improvements in Acetylene Lamps.
Year: 1898

page_text: Date of Application, 7th Nov., 1898-Accepted, 11th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Acetylene Lamps.
We, JULIUS CARL HERMANN MÖLLER, of 7, Mozartstrasse, Merchant, and CARL
WILHELM CHRISTIAN LUDWIG SCHAEFER, of 11, Mozartstrasse, Engineer, both
of Hamburg, in the Empire of Germany, 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:
This invention relates to an acetylene table-lamp the special constructional
features of which are hereinafter explained and illustrated in the accompanying
drawing, in which:
Figure 1 is a vertical section of the lamp.
Figure 2 is a cross-section taken upon the line of Figure 1, and
Figure 3 is a cross-section taken upon the line y-y of Figure 1.
The glass globe and globe-holder of the lamp are omitted in the drawing;
the burner shewn is an acetylene burner of the ordinary kind.
The body of the lamp consists of three principal portions, that is to say, the
water reservoir A, the regulating portion B and the base or foot for the
reception of the carbide receptacle.
This latter is of the form of an open dish a. The carbide is placed therein,
and the vessel is firmly attached at its lower portion to the base of the lamp.
This open or dish like form presents the advantage that whilst the decomposition
of the carbide is taking place it is able to increase in volume without restriction.
The water is supplied by dropping; it is introduced into the water reservoir A
through the air admission aperture b which is provided with a screw stopper b¹.
The admission of the water is effected by means of the screw c; the valve c¹
being lifted from its seat c² and so permitting the water to enter the tube d.
The cock e is shewn in its open position; the function of this cock is hereinafter
explained.
The dropping device consists of a hollow heart-shaped part f arranged upon
the lower extremity of the tube d. The water issues through lateral apertures f¹
and flows along downwardly extending rods inserted in the part f. The
number of places at which the water drops upon the carbide of course corre-
sponding to the number of rods provided. In addition, any water which may
not flow along these rods will drop from the point 3 formed upon the part f.
By this means a thorough wetting, and consequently complete utilisation of
the carbide is ensured.
The acetylene gas produced is conducted to the principal burner h through the
tube g and gas cock o. The generating chamber communicates above with the
cylinder this latter is surmounted by a bell j capable of rising and falling,
and a tight closing of the gas chamber is effected by means of a water seal or
with glycerine or other suitable liquid.
If notwithstanding the careful regulation of the water supplied, which may be
effected by the screw c an excess of acetylene is produced over and above the

page_text: amount which the tube g and the burner h are capable of conducting away, the
excess of pressure so produced will cause the bell to rise.
The lever e¹ of the cock e is attached to the bell j and upon the formation of
the slightest excess of pressure, the water supply is at once cut off and so con-
tinues until a reduction of pressure takes place and the bell again falls, thereby
opening the passage for the flow of water.
Should the excess of pressure nevertheless become so great as to cause the gas
to traverse the sealing liquid and enter the space k, it is conducted through the
tube to the auxiliary burner l'. The gas issuing from the burner ignites in
the flame of the principal burner.
The tubular upright B is provided with an opening m in order to facilitate
access to the internal mechanism. When the mechanism has been adjusted and
the lamp is ready for use, closing is effected by means of the shaped ring .
The escape tube is made wider at its lower portion and within this widened
portion works a guide rod j₁ for the bell j.
The cylinder i is provided with a thin tube in order to prevent the possibility
of the sealing liquid flowing over the edges and reaching the carbide vessel as
might otherwise be the case should the lamp be much inclined and if a larger
opening were provided.
1
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
1. An acetylene table lamp in which the water is supplied from a reservoir A
by means of a regulating valve c¹ to the carbide vessel a arranged in the base of the
lamp, this vessel a being an open one for the purpose of enabling the residue to
freely increase in volume and of facilitating the removal of the same, the acetylene
gas produced under normal pressure being conducted through the tube y to the
burner, whilst should overproduction of the gas take place its generation is
at once stopped owing to the fact that the consequent rising of the gasometer
bell closes the cock e of the water supply pipe d.
2. An acetylene gas table lamp of the kind described in Claim 1, in which
such gas as may pass through the liquid sealing the gasometer bell as a result
of considerable over-production is conducted to an auxiliary burner on issuing
from which it becomes ignited at the flame of the principal burner for the
purpose of preventing the escape into the atmosphere of any gas produced in
excess during the time the lamp is in use, thereby obviating all danger.
3. In acetylene gas table lamps as described in Claims 1 and 2, a water dropping
device consisting of a hollow heart-shaped part f provided with lateral outlets fi
and dropping rods f extending in a downward direction.
1
L
1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London. W.C., Agents for the Applicants.