Improvements in Steam Boilers.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
I, FREDERICK WILLIAM GOLBY, of 36, Chancery Lane, in the County of Middle-
sex, Patent Agent, do hereby declare the nature of this invention as communicated
to me by Johann Schütte, of 79, Deichstrasse, Bremerhaven, Germany, Engineer,
to be as follows:-
In comparison with ordinary marine boilers, water tube boilers have the
advantage of smaller weight and of generating steam more rapidly, therefore
they are employed in the navies of the different States, on the other hand they
have the disadvantage of consuming about 26% more coal and of being more
subject to repairs, therefore they are not employed in the mercantile navy.
The object of the present invention is to provide a boiler which combines the
advantages of both the cylindrical and the water tube boilers.
To this end the boiler must fulfil the following conditions:-
1. It must have a smaller weight and water space than a cylindrical boiler of
the same heating surface.
2. The flame must develop in a large space as is the case in a locomotive boiler
and then be divided into a large number of parts, in order to obtain a good
effect.
3. It must be readily accessible and easy to be cleaned.
4. It must have a very large heating surface in comparison to the volume of
water.
5. It must not have larger dimensions than a cylindrical boiler of same power.
These points have been considered in the construction of the new boiler.
The boiler consists of two flat water reservoirs provided with steam collectors
the two reservoirs being connected to one another by tubes. In the lower tube is
placed concentrically a furnace tube whilst the upper tubes are traversed by a
number of fire-tubes.
Facing the rear wall, in the fire chamber, is arranged a vertical boiler tube
connected on both sides to the rear reservoir by pipes. Lateral pipes also con-
nect the two reservoirs to each other.
On both sides of the furnace-tube are arranged between the two reservoirs,
two additional furnaces the flames of which pass into the fire chamber through
tubes traversing the rear reservoir.
The flames of the furnace tube enter directly the the fire chamber, whilst the
flames of the lateral furnaces heat the inner walls of the two reservoirs and the
connecting tubes before entering the fire box through the tubes leading thereinto.
Here the fire gases heat the boiler tube and the water tubes and then return
through the fire tubes into the smoke box and thence into the chimney.
The fire gases in the upper part of the space between the two reservoirs pass
into the fire box through pipes. The circulation of the water in the boiler is excellent
the water tubes being inclined for the purpose of facilitating the movement of
the steam globules towards the collectors.

page_text: It will thus be seen that the boiler is on the one hand a fire tube boiler and
has therefore a high effect, on the other hand it is a water tube boiler and has
therefore a small water space. The boiler thus combines the advantages of both
kinds of boiler. It is, moreover, readily accessible, can be easily cleaned, and
the pipes may be easily changed.
Dated this 22nd day of December 189
Improvements in Steam Boilers.
I, FREDERICK WILLIAM GOLBY, of 36, Chancery Lane, in the County of Middle-
sex, Patent Agent, do hereby declare the nature of this invention and in what
manner the same is to be performed, as communicated to me by Johann Schütte,
of 79, Deichstrasse, Bremerhaven, Germany, Engineer, to be particularly described
and ascertained in and by the following statement:-
In comparison with ordinary marine boilers, water tube boilers have the
advantage of smaller weight and of generating steam more rapidly, therefore
they are employed in the navies of the different States, on the other hand they
have the disadvantage of consuming about 26 per cent. more coal and of being more
subject to repairs, therefore they are not employed in the mercantile navy.
The object of the present invention is to provide a boiler which combines the
advantages of both the cylindrical and the water tube boilers.
To this end the boiler must fulfil the following conditions:
1. It must have a smaller weight and water space than a cylindrical boiler of
the same heating surface.
(2) The flame must develop in a large space as is the case in a locomotive boiler
and then be divided into a large number of parts, in order to obtain a good
effect.
(3) It must be readily accessible and easy to be cleaned.
(4) It must have a very large heating surface in comparison to the volume of
water.
(5) It must not have larger dimensions than a cylindrical boiler of same power.
These points have been considered in the construction of the new boiler.
The boiler is represented in the accompanying drawings,
Fig. 1 being a transverse section and
Fig. 2 a horizontal section,
Fig. 3 is a longitudinal section on the line 1-1 of Fig. 1 and
Fig. 4 is a longitudinal section on the line 2-2 of Fig. 1.
The boiler consists of two flat water-reservoirs a provided with steam collec-
tors b, the two reservoirs being connected to one another by tubes c and e. In
the lower tube c is placed concentrically a furnace tube d, whilst the upper
tubes e are traversed by a number of fire-tubes g.
Facing the rear wall, in the fire-chamber, is arranged a vertical boiler-tube h
connected on both sides to the rear-reservoir by pipes i. Lateral pipes also
connect the two reservoirs to each other.
On both sides of the furnace-tube d are arranged between the two reservoirs,
two additional furnaces 7 the flames of which pass into the fire-chamber through
tubes m traversing the rear reservoir.
The flames of the furnace-tube enter directly the fire-chamber, whilst the
flames of the lateral furnaces heat the inner walls of the two reservoirs and the

page_text: connecting tubes c and e before entering the fire-box through the tubes m leading
thereinto. Here the fire-gases heat the boiler-tube and the water tubes i and
then return through the fire-tubes g into the smoke-box n and thence into the
chimney.
The fire-gases in the upper part of the space between the two reservoirs pass
into the fire-box through pipes o. The circulation of the water in the boiler
is excellent, the water-tubes i, k, cand e being inclined for the purpose of
facilitating the movement of the steam-globules towards the collectors.
It will thus be seen that the boiler is on the one hand a fire-tube boiler and
has therefore a high effect, on the other hand it is a water-tube boiler and has
therefore a small water-space.
The boiler thus combines the advantages of both kinds of boiler. It is more-
over, readily accessible, can be easily cleaned, and the pipes c, e, d, g may be
easily exchanged.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
(1) Steam-boiler with two flat water-reservoirs a with tubes ce connecting
them together the distinguishing feature of which is that the one and lower
tube c is furnished with a furnace tube, the other and upper tube e with narrow
fire-tubes, so that the heating gases drawn from the front to the back through the
furnace-tube, as well as those generated on the steam-collectors 6 in the fire-
chamber for heating the outsides of the tubes ce are carried back again to the
front through the narrow fire-tubes substantially as described and illustrated.
(2) Steam-boiler according to Claim 1, the distinguishing feature of which is
that the conveyance of the heating gases to the fire-tubes of the upper tube e
is effected by means of a combustion chamber, which is limited by a vertical or
horizontal boiler-tube h and narrow pipes i connecting the boiler-tube with the
back (or back part of the) boiler, substantially as described and illustrated.
(3) Steam boiler according to Claim 1, the distinguishing feature of which
is that the heating chamber employed for the heating the outsides of the tubes ce
is shut off at the sides by narrow water-tubes k slightly inclined to the horizontal
plane, substantially as described and illustrated.
Dated this 12th day of June 1800

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