Year: 1898

page_text: Date of Application, 8th Feb., 1898-Accepted, 9th Apr., 1898
We, MASSIMO TOMELLINI and GIUSEPPE FRANCIA, both of Migliarina Al Monte,
Province of Gènes in the Kingdom of Italy, 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 improved apparatus is based on the use of a hydrogen generator for the blow-
pipe, to which has been added means intended to cool and to dry the gas issuing
from the generator.
The invention is illustrated in the accompanying drawing which shows a side
elevation of the improved apparatus.
It is composed of two reservoirs of lead, A, and B, of suitable resistance, the
lower one A of which is provided' with a lid a hermetically fastened at its circum-
ference, while the upper reservoir, B, is open at the top. The two receptacles are
united by three lead tubes, b, b1, b2, placed around the rim of the lid.
The tubes b, b¹ serve only to support the reservoir B, while the tube 68 is designed
to establish communication between the reservoirs A and B the said tube having a
prolongation, D, which descends nearly to the bottom of the reservoir A, and, which
is bevelled at its end. In the centre of the lid a there is a hole d provided with a
stopper with a bronze screw.
From any suitable point of the lid a proceeds another lead tube E, which serves
for the delivery of the hydrogen generated in the reservoir A: this tube ends in a
cock or valve e.
Near the bottom of the receiver A is provided a grating of lead, P, and at the
side of said reservoir a stopper with a brass screw Q. The zinc is introduced into
the reservoir A through the hole d and rests on the grating P.
The sulphuric acid is poured into the reservoir B with the water, which then
passes through the tube b D into the reservoir A and attacks the zinc.
The hydrogen which is developed passes through the tube E and if the tap e is
closed, accumulates and exerts pressure upon the level of the liquid thus causing it
to descend to that of the grating P, whereby the action on the zinc and the con-
sequent further development of hydrogen is prevented.
The apparatus so far described possesses the inconvenience that in consequence
of the heat produced in the reservoir A, owing to the chemical action of the
sulphuric acid on the zinc, vapour or steam is produced which passes through the
tube E with the hydrogen, and condenses in the passage in such a way that small
drops of water reaches the blow pipe at the same time as the gas.
To obviate this inconvenience "and to give greater power to the apparatus, and
also to enable it to be used for all solders, and especially for those of aluminium we
provide a receiver C with small bronze inlet and outlet tubes c¹ and 2, rubber
tubes F and G and the branched bronze tube L having two pairs of taps 1, 1, the
rubber tube K for supplying the air and the rubber tube M which conducts the air
and hydrogen mixed together to the blow pipe H for the oxy-hydrogen flame.
The
These different parts may be fixed or supported in any suitable manner.

page_text: tube K may take the air directly from the atmosphere, or to obtain greater efficiency
the said tube may be connected with an air forcing device worked by means of a
treadle or it may be connected with a reservoir filled with compressed air, or such
air may be supplied by any other suitable means.
The form of the bifurcated tube L with the appendage m allows the hydrogen and
air to mix before reaching the blow pipe H.
The taps and 11, put in pairs for greater security, enable communication 'to
be interrupted or established at will.
The receiver C is nearly filled with water. The tube c¹ extends as shown at c³
to near the bottom of the said receiver..
The hydrogen gas from the tube F is compelled to pass through the receiver C
and to bubble through the water, it thus becomes cooled and deposits by condensa-
tion the steam which it brought with it.
If any residue of steam remained it would condense in its course through the
tube G, and the water thus condensed would fall into the above-mentioned
receiver C.
The hydrogen in a dry state will thus be delivered to the blow pipe with the air
issuing from the tube K.
Having now particularly described' and 'ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what we
claim is:
.. I
In a hydrogen generator for the oxy-hydrogen flame for soldering generally and
especially for soldering aluminium, the combination of the above-mentioned
apparatus with a reservoir for cooling and desiccating the hydrogen, with a
branched bronze tube for mixing the hydrogen and air before they reach the blow
pipe.
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Coral 1000.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.