Improvements in Steam Generators.
Year: 1891

page_text: „Date of Application, 15th May, 1891-Accepted. 27th June, 1891
Improvements in Steam Generators.
I, WILHELM WALTHER, Manufacturer, of Kalk near Cologne, 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:-
:-
The present invention relates to water tube boilers or semitubular steam
generators having a large water space and special means for producing a rapid
circulation.
In the following description reference will be made to the accompanying drawings,
in which
Fig. 1 is a longitudinal vertical section.
Fig. 2 a cross section and
Fig. 3 a horizontal section of a boiler embodying my invention,
The generator comprises a long upper shell C, a short lower shell S connected
at the back with the rear part of the upper shell by a short vertical tube, while the
front is connected with the water chamber a; a pair of water chambers a and b
placed close together and connected with the upper shell by short tubes and i; a
set of inclined water tubes e; which pass with their upper ends through the water
chamber b, into the chamber and are therefore provided with three expanded
joints d fand (that is to say joints made tight by expanding the tube). In the
interior of the chamber cach tube has two diametrically opposite apertures m
and of the size of a hand, which enables the steam to ascend without hindrance
and which also facilitate the cleaning of the chamber.
!
When the boiler contains only one upper shell C, the latter is provided with a
partition K, commencing at the connecting tube h, in order to direct the mixture
of steam and water which has been produced in the tube c and ascended into the
upper boiler C, first towards the front and subsequently again backward, during
which time the water deposits more or less of its impurities.
The vapours produced in the tubes e are conducted through the openings men
into the chamber and then into the upper boiler C, where they travel forward
along one side of the partition K.; subsequently they return along the opposite side
of the partition, as far as the opening of the rear connecting tube m, through
which they descend into the chamber a, or into the lower boiler. They feed the
evaporating tubes c through the axial tubes, which extend into the interior of the
tubes e from the rear end towards the front of the same, as shown by the drawings.
In the case of steam generators having two or more upper shells C, the partition K
is omitted, the mixture of steam and water being first conducted through one of
them to the front, then through the connecting pipe of the upper shells and the
second upper shell towards the back, where it enters the chamber a and the lower
shell or boiler.
The lower end of each of the tubes e is closed by means of conically bored caps L,
each of which is mounted on the conically turned ends of the tube without any
packing material, and then secured in position by means of a divided flange and a
pair of screw bolts (not shown in the drawing).
Having now particularly described and ascertained the nature of my said
vention, and in what manner the same is to be performed, I declare that what I
laim is :-
A. water tube boiler or semi-tubular steam generator, comprising in its con-
truction one or more upper shells C, a short lower shell S connected with the said
pper shell or shells, a water chamber a situated at the front end of the lower shell,

page_text: a water chamber placed close to the chamber a, a set of water tubes connecting
the chamber a with the chamber and secured to the said chambers by means of
three expanded joints, each tube having in the chamber a pair of apertures m, n
and at the front end a cap, the said water chambers being connected with the upper
shell or shells, and circulation being established, in the case of steam generators
with one upper shell, by means of a partition K, and in the case of steam
generators with several upper shells, by the connection between the said shells and
their arrangement relatively to the mouths of the chambers a, b, substantially as
described.
FAIRFAX & WETTER,
433, Strand, London, Agents for the Applicant.