Improvements in Steam Generators.
Year: 1891

page_text: Date of Application, 15th May, 1891-Accepted, 27th June, 1891.
Improvements in Steam Generators.
1, 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 system of tubular boilers forming the subject of the present invention is
illustrated by the accompanying drawings, of which
Fig. 1 is a longitudinal vertical section,
Fig. 2 partly a cross section and partly a front view.
Fig. 3 à horizontal section.
The boiler is provided with two water chambers a and situated close together,
by which means it becomes possible to give to the tubes a three expanded joints
at d, and g (that is joints made tight by expanding the tube). These tubes c,
which can be inserted either from the front or from the back, are provided with
openings m, n, of the size of a hand, in order that the bubbles of steam may ascend
without hindrance, and that the chambers may be easily cleaned. The chamber a
serves for feeding the tubes through the central tubes r. Each of the chambers a
and b is connected with the upper shell or shells. When one upper shell or boiler
only is employed, it is provided with a partition K, so as to form two compartments
which are united with one another at the near end only. By means of this
partition K, the mixture of water and steam ascending from the chambers h and i is
conducted backward in the direction of the axis of the boiler, subsequently the
current returns to the front along the opposite side of the partition K, and descends
through the opening into the other chamber a, whence it passes by way of the
feed tubes into the heating or boiling tubes c. In this way I produce a circulation.
and a separation of the steam from the water, the steam ascending to the top,
while the water descends and deposits, its mud or similar solid matter in the upper
shell.
When two top boilers or upper shells are employed, the circulation takes place
through one of the top boilers from towards the rear and then through a
cross connection to the second boiler, and through this back again to the
chamber h.
The water chambers a and b may be rivetted directly to the top boiler or top
boilers, or they may be bolted to short connecting pieces, rivetted to the upper
shell or shells, as indicated by the drawings.
The further end of each tube is provided with a turned ring, or with a turned
cone formed on the tube itself, and is closed by a conically bored cap L of steel,
iron or any other suitable metal, without any packing material, and the cap is
secured by means of a divided flange K and a pair of screw bolts 1, so that each tube
may be easily cleaned.
The object of the divided flange is, to enable a fresh flange, whenever breakage
occurs, to be applied, without rendering it necessary to withdraw the tube. Instead
of a divided flange, I may, however, employ a complete flange which is screwed on
to the tube.
Instead of the horizontal upper boiler or shell, I may use a vertical boiler, with
which the two water chambers a and b must then be connected in a suitable manner
and at a proper inclination.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare, that what I
claim is :-
A water tube boiler or tubular steam generator, comprising in its construction
one or more horizontal or vertical upper shells or boilers, a pair of water
chambers a, b, placed close together and connected with the said upper shells, a set
of water tubes & having outlets m, n, and conical caps secured to the tubes by means
of divided flanges and screw bolts, each of the said tubes being connected with the
said water chambers by means of three expanded joints, and means for establishing
circulation in the upper shell or shells, said means, in the case of a single upper
shell, consisting of a partition K, and in the case of several upper shells, of a suitable
connection between the said shells and their arrangement relatively to the mouths of
the water chambers, substantially as described.
Dated this 14th day of May 1891.
FAIRFAX & WETTER,
433, Strand, London, Agents for the Applicant. -