An Improved Steam Generator, suitable for Locomotive Engines, and for other purposes.
Year: 1894

page_text: Date of Application, 14th June, 1894
Complete Specification Left, 14th Mar., 1895-Accepted, 20th Apr.,
1895
PROVISIONAL SPECIFICATION.
An Improved Steam Generator, suitable for Locomotive Engines,
and for other purposes.
I, MAX HARFF, Factory Owner, of Cologne, in the German Empire, do
hereby declare the nature of this invention to be as follows:-
The improved boiler is mainly intended for use in connection with railway
locomotive engines, but applicable also to torpedo boats, steam cranes, dredging
machines, pile drivers and similar engines, and has for its object, to combine
some of the valuable features of water tube boilers with those of ordinary
locomotive boilers.
In the accompanying drawings,
Fig. 1 is a longitudinal section and Fig. 2 an end elevation of a boiler embodying
my invention;
Figs. 3 to 5 represent modifications.
The flue tube boiler a is connected with the water tube boiler b by the water
chamber c. In the front wall c¹ of the latter there are fitted not only the flue
tubes a¹, but also the water tubes b', the front ends of which lead into the
water chamber d arranged at the head of the upper boiler 62. The water tube
boiler is thus connected with the flue tube boiler at the top by the upper boiler b³,
and below, by the water tubes. The two bodies are therefore connected both in
the steam and water chambers, with the result, that a large evaporating surface is
formed, while at the same time the circulation of the entire quantity of water
present in the boiler is promoted. The front water tank d is provided with an
opening d¹ for the introduction of fuel. Where there is a comparatively large
number of heating tubes, their front ends may be located within a box e, the
sides of which are contracted in the forward direction, and fitted to the wall c¹ of
the water chamber c, Fig. 3.
Instead of a group of flue tubes, one flue, either smooth or corrugated, and
with or without " Galloway" tubes (Fig. 4), may be employed, in which case
the connection with the water tank is made either in the manner described with
reference to Fig. 3, or directly, by simply extending the flue through the said
tank. Or the Hue tubes may be fitted in a specially provided wall w (Fig. 5)..
The space left between this wall and the water chamber c serves both for the
insertion of the tube or flue ends, and as a combustion chamber and a receptacle
for fine ashes, which may be discharged through an outlet w' provided for the
purpose. The hot gas rising from the grate in the fire box, as they do so,
envelop the water tubes which may have a plate & arranged over them; the said
gases eventually escaping through the flue tubes into the funnel.
Dated this 13th day of June 1894.
FAIRFAX & WETTER,
Agents for the Applicant.

page_text: An Improved Steam Generator, suitable for Locomotive Engines,.
and for other purposes.
I, NAX HARFF, Factory Owner, of Cologne, in the German Empire, 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 boiler is mainly intended for use in connection with railway
locomotive engines, but applicable also to torpedo boats, steam-cranes, dredging
machines, pile drivers and similar engines, and has for its object, to combine some
of the valuable features of water-tube boilers with those of ordinary locomotive
boilers.
In the drawings filed with the Provisional Specification,
Fig. 1 is a longitudinal section and Fig. 2 an end-elevation of a boiler embodying
my invention;
Figs. 3 to 5 represent modifications.
The flue-tube boiler a is connected with the water-tube boiler by the water
chamber c. In the front-wall c¹ of the latter there are fitted not only the
flue-tubes a', but also the water-tubes b', the front ends of which lead into the
water chamber d arranged at the head of the upper boiler 6. The water-tube
boiler is thus connected with the flue-tube boiler at the top by the upper boiler 6³,
and below, by the water-tubes. The two bodies are therefore connected both in
the steam and water chambers, with the result, that a large evaporating surface is
formed, while at the same time the circulation of the entire quantity of water
present in the boiler is promoted. The front water tank d is provided with an
opening d for the introduction of fuel. Where there is a comparatively large
number of heating tubes, their front ends may be located within a box e, the sides
of which are contracted in the forward direction, and fitted to the wall c¹ of the
water chamber c, Fig. 3.
Instead of a group of flue tubes, one flue, either smooth or corrugated, and with
or without " Galloway" tubes (Fig. 4), may be employed, in which case the
connection with the water tank is made either in the manner described with
reference to Fig. 3, or directly, by simply extending the flue through the said
tank. Or the Alue-tubes may be fitted in a specially provided wall w (Fig. 5).
The space left between this wall and the water chamber c serves both for the
insertion of the tube or flue ends, and as a combustion chamber and a receptacle for
fine ashes, which may be discharged through an outlet w' provided for the
purpose. The hot gases rising from the grate in the fire box, as they do, so,
envelop the water tubes which may have a plate 6 arranged over them; the said
gases eventually escaping through the flue tubes into the funnel.
As in the case of locomotives a strong draught is available, the combustion
will be practically complete, and the heat will be well utilized, because the flame
must act on a large heating surface.
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 ;-
1. The combination of a flue tube boiler with a water tube boiler in such
a manner, that the upper boiler of the water tube boiler is situated above and the
water tubes are situated below the middle of the flue tube boiler, and that the flue
tubes are arranged either directly in the front plate of one of the water chambers,
or in a separate plate, substantially as described.

page_text: 2. In a steam generator of the type specified, a box or short flue, which
is narrowed towards the front and fixed in the front wall of the chamber c,
while the rear wall of the said flue receives the flue-tubes, substantially as
described.
3. In a steam generator of the type specified, a plain or corrugated flue-tube,
with or without Galloway tubes, as a substitute for the flue tubes, substantially
as described.
4. In a steam generator of the type specified, a separate ash-collector formed
by the use of a wall or plate for fixing the flue tubes, substantially as.
described.
Dated this 14th day of March 1895
FAIRFAX & WETTER,
433, Strand, London, Agents.