Improvements in Steam Generators.
Year: 1893

page_text: Date of Application, 24th Apr., 1893
Complete Specification Left, 19th Jan., 1894-Accepted, 3rd Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
A communication from abroad by LA SOCIÉTÉ ANONYME DU GÉNÉRATEUR
DU TEMPLE, of Paris, 'in the French Republic.
PHILIP MIDDLETON JUSTICE of 55 and 56 Chancery Lane, in the County
of Middlesex, Fellow of the Chartered Institute of Patent Agents, do hereby
declare the nature of this invention to be as follows:-
This invention relates to steam generators of what are known as the" Du Temple".
type.
The invention will be explained by reference to the accompanying drawing in
which :-
Fig. 1 is an end elevation of the generator.
Fig. 2 is a sectional end elevation of same, and Fig. 3 is a partial side elevation
through the centre line' X Y of Fig. 2.
The generator consists of an upper collector A and two lower collectors B, B',
which are joined together by the small tubes C C¹ (all of the above being more or
less exposed to the direct heat of the fire) and by tubes D D' of larger diameter of
which two are placed at each end of the generator ouside of the casing of same so
that by reason of their being-exposed to a lower temperature a circulation of the
water is maintained. The collectors B B₁ are cylindrical in section and are
preferably provided with hand holes throughout their length for the purpose of
reaching the tubes CC, and with end doors for enabling a person to creep into
same if the collectors are of sufficient diameter. The tubes C Care of steel, copper,
copper alloys &c., and are arranged as seen in Fig: 2 to enter the upper parts of
the lower collectors. so that if steam should be formed in these it is directly.
discharged, the object being to prevent the formation of pockets for the steam to
collect in by any sharp bending of the tubes.
The
Furthermore the tubes being secured in the upper part leave the lower part of
the collector for the accumulation of foreign matters. The large section of these
collectors also allow an ample water reserve for supplying the tubes.
tubes C-C after springing from the collectors cross each other in the centre of the
boiler and enter the upper collector upon the side opposite to the starting point,
each end being: immersed in solid water. They may be reduced in diameter in
their upper half or portion where they enter the upper collector so as to produce a
more concentrated jet of water into the latter. The crossing of the tubes enables
a very simple curve to be given to them, thus avoiding sharp bends while allowing
for the proper passage of the fuel gases between them; it also protects the under
surface of the collector A from the direct heat of the flame so that undue
ebullition is avoided therein, and furthermore it assists in bringing the weight of
the generator comparatively low down which is of advantage when it is applied to
small boats.
It will also be seen that the lowest tubes which are exposed to the direct heat
of the flames are situated so that they are most readily reached for repairs,
because in the upper as well as in the lower collectors they are the nearest to
hand. The arrangement of the tubes also enables them to be readily cleaned both
inside and outside.

page_text: Improvements in Steam Generators.
A communication from abroad by LA SOCIÉTÉ ANONYME DU GÉNÉRATEUR
DU TEMPLE, of Paris, in the French Republic.
I, PHILIP MIDDLETON JUSTO, of 55 and 56 Chancery Lane, in the County
of Middlesex, Tellow of the Chartered Institute of Patent Agents, 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 steam generators of what are known as the "Du Temple"
type.
The invention will be explained by reference to the drawing accompanying
the Provisional Specification in which :-
Fig. 1 is an end elevation of the generator.
Fig. 2 is a sectional end elevation of same, and Fig. 3 is a partial side elevation
through the centre line X Y of Fig. 2.
The generator consists of an upper collector. A and two lower collectors B, B¹,
which are joined together by the small tubes C C (all of the above being more or
exposed to the direct heat of the fire) and by tubes D D' of larger diameter of
which two are placed at each end of the generator outside of the casing of same so
that by reason of their being exposed to a lower temperature a circulation of the
water is maintained. The collectors B B' are cylindrical in section and are
preferably provided with long hand holes or doors throughout their length for the
purpose of reaching the tubes C C, and with end doors for enabling a person to
creep into same if the collectors are of sufficient diameter. The tubes C C¹ are of
steel, copper, copper alloys &c., and are arranged as seen in Fig. 2 to enter the
upper parts of the lower collectors so that if steam should be formed in these it is
directly discharged, the object being to prevent the formation of pockets for the
steam to collect in by any sharp bending of the tubes.
Furthermore the tubes being secured in the upper part leave the lower part of
the collector for the accumulation of foreign matters.
The large section of these collectors also allow an ample water reserve for
supplying the tubes. The tubes C C after springing from the collectors cross each
other forming a sort of grating in the centre of the boiler and enter the upper
collector upon the side opposite to the starting point, each end being immersed in
solid water. They may be reduced in diameter in their upper half or portion
where they enter the upper collector so as to produce a more concentrated jet of
water into the latter. The crossing of the tubes enables a very simple curve to be
given to them, thus avoiding sharp bends while allowing for the proper passage of
the fuel gases between them; it also protects the under surface of the collector A
from the direct heat of the flame so that undue ebullition is avoided therein, and
furthermore it assists in bringing the weight of the generator comparatively low
down which is of advantage when it is applied to small boats.
It will also be seen that the lowest tubes which are exposed to the direct heat of
the flames are situated so that they are most readily reached for repairs, because
in the upper as well as in the lower collectors they are the nearest to hand. In
place of the arrangement of tubes described and shown a part only of the cluster
of tubes may be arranged directly over the fire the other portion following it so
that the hot gases after having mounted vertically in the first tubular cluster
traverse the second cluster horizontally. The arrangement of the tubes also
enables them to be readily cleaned both inside and outside. In the internal
cleansing it is sufficient to pass through them a rod with a brush and scraper or to
thread through them a chain on which are a number of steel scraper discs. The

page_text: end of the chain which passes into the lower collector is pulled to and fro through
one of the doors of same which is opened for the purpose, a man in the upper
collector holding the other end of the chain. The outer cleaning may be done by
a brush or scraper.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is :-
1. In a steam generator, an upper cylindrical collector, lower cylindrical collectors
placed on either side of same, and tubes connecting the upper and lower collectors,
said tubes entering the upper surface of one of the lower collectors, crossing beneath
the upper collector and entering it on the opposite side, substantially as and for
the purpose described.
2. In a steam generator, an upper cylindrical collector, lower cylindrical collectors
and tubes connecting the upper and lower collectors said tubes having their upper
portions of a smaller diameter than the lower, substantially as and for the purpose
described.
3. In a steam generator, the arrangement of the lower cylindrical collectors
provided with doors throughout their length and end doors, substantially as and
for the purpose
described.
4. The improvements in steam generators substantially as described and as
illustrated in the drawings.
Dated this 19th day of January 1894.
PHILIP M. JUSTICE.