Year: 1898

page_text: Date of Application, 28th Dec., 1898
Complete Specification Left, 28th Sept., 1899-Accepted, 23rd Dec., 1899
I, FELIX CLAUSS, of Meerane, Saxony, Germany, Dr Juris, do hereby declare
the nature of this invention to be as follows..
This invention relates to steam-generators which are especially adapted for
the combustion of gaseous fuel, and possess the advantages that, in consequence
of a thorough utilization of the thermal units of the fuel, steam can be generated
in the shortest possible time and in the least possible space in sufficient quantity
to heat the various rooms of say one or more dwelling-houses provided with suit-
able radiators
According to one construction such a steam generator comprises a jacketed
feed water chamber below which is a heating or combustion chamber the wall
of which is formed by a close pipe coil or by two concentric cylindrical walls
forming a water jacket through which the water to be evaporated is led from the
upper chamber for preliminary heating. Several thin coiled generating tubes
lead upwards within the combustion chamber from the bottom of the said Jacket
Arranged centrally in the combustion chamber and extending down through
the bottom thereof 18 a steam chamber to which the said steam generating tubes
ale connected, in order to receive and if necessary to superheat the steam in the
said steam chamber From the lower end of the steam chamber extends the pipe
for supplying steam to, for instance, a low pressure steam heating system with
ribbed heating surfaces, for one o more dwelling-houses
from this heating system can be delivered into the feed water chamber there to
be condensed by the water contained therein, to which it will give up its latent
heat. To produce a preliminary heating of the water in the feed water chamber
the said water may be traversed by several thin pipe coils, through which a
part of the combustion gases from the heating or combustion chamber will pass
on the way to the flue or chimney, whilst the rest of such gases will pass
through a jacket with which the feed water chamber is provided Gaseous fuel
may be supplied by pipes leading to buineis each situated within one of the
generating coils.
The etuin steam
The steam generator just described 18 especially adapted for the generation
of low pressuie steam, in order to make it available for the generation of
high pressure steam the space above the water level in the feed water chamber
may be connected with the interior of the steam chamber by a pipe, so that the
pressure of the steam above the water level and that in the steam chamber will
be equalized There will thus be no lundiance offered to the passage of the
water from the feed water chamber or from the jacket of the combustion
chamber into the generating pipes; on the contrary, the water will be forced
into the generating pipes by the heal in the feed water chamber.
A great simplification 18 effected in another modification in which the feed
water chamber is dispensed with and the water jacket is adapted to serve as a
feed water reservoir.

page_text: In order to adapt the steam generator above described for such purposes as
household use, for example, where the apparatus is requied to be very simple
in operation and to requue very little attendance, a further modification of
the generator is employed, according to which the feed water chamber is in the
form of two upright cylinders with removable coveis, whilst the steam chamber
18 shaped somewhat like a closed bell arranged with the wide part upmost and
has coiled around it two spiral genciating pipes connecting it with the said up-
right water cylinders, one end of each coil being connected to the bottom of a
water cylinder and the other end to the top of the steam chambei The heat
which is or may be furnished by a 1ng-shaped burner at the bottom of the steam
chamber, passes upwards through or amongst the coils of the generating pipes
In this aangement, also, the return steam, say from a range of radiators, 18
conducted to the cylindrical feed water heaters so that the water of condensation
which forms in the said radiators can flow back into the feed water chamber.
This renders refilling of the latter seldom necessary
Doted this 08th dow of December 1000
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, WC,
Agent for the Applicant.
I, FELIX CLAUSs, of Meerane, Saxony, Germany, Doctor of Laws, 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 which are especially adapted for
the combustion of gaseous fuel, and possess the advantages that, in consequence
of a thorough utilization of the thermal units of the fuel, steam can be generated
in the shortest possible time and in the least possible space in sufficient quantity
to heat the various rooms of say one or more dwelling-houses provided with suit-
able ladiators
Examples of steam generators according to this invention are represented in the
accompanying drawings, wherein
Fig 1 is a side elevation partly in section, of a generator especially adapted
for supplying low-pressure steam,
Fig 2 is a plan thereof partly in section;
Fig 3 is a side elevation partly in section of a modification adapted for
generating high-pressure steam.
Figs 4 and 5 are side elevations partly in section of further modifications
Such a steam generator may (see Figs 1 and 2) comprise a jacketed feed-
water chamber A into which the feed-water enters by a pipe a Below the feed-
water chamber A 18 a heating or combustion chamber B, the wall of which 18
formed by a close pipe coil or by two concentre cylindrical walls forming a
water jacket through which the water to be evaporated is led from the upper
chamber for pieliminary heating Several thin coiled generating tubes d lead
upwards within the combustion chamber B from the bottom of the coil b¹ or
Jacket The coiled generating tubes d may be heated by gas-burnera k each of
which is located within one of the coils and may be provided as in the examples
shown in Figs. 1 to 4. with a disc or baffling plute e of refractory material above
the nozzle for the purpose of spreading the flame over the entire surface of each

page_text: coiled tube, and thereby effecting a rapid and certain evaporation of the heated
water from the jacket The an necessary for the combustion of the gas may
be supplied therewith by the pipes / Aanged centially in the combustion
chamber B and extending down through the bottom thereof is a steam chamber C
which in the examples shown in Figs. 1 to 4 is cylindrical and provided with a
hemispherical upper end and to which the steam generating tubes dare con-
nected in order to deliver the steam generated therein to the steam chamber C
From the lower end of the steam chamber C extends a pipe f provided with a
safety valve g for supplying steam to, for instance a low pressure steam-heating
system with libbed heating surfaces, for one oi more dwelling houses. The
return steam, from this heating system may be delivered by a pipe into the
feed water chamber A, there to be condensed by the water contained therein,
to which it will give up its latent heat.
To produce a preliminary heating of the water in the chamber A the said water
may be traversed by several thin pipe coils through which a part of the com-
bustion gases from the chamber B will pass on the way to the flue or chimney,
whilst the rest of such gases will pass, as indicated by arrows in Fig 1, through
a jacket with which the chamber A 18 provided. My steam-generating apparatus
may be placed on a cylindrical base which may be completely closed so as to
form a reservon for the au requied to support combustion, the au being con-
ducted thereto by a special au tube and being withdrawn therefiom to mix
with the gas by means of an ejector nozzle arranged within the gas supply
pipes. A chai acteristic feature of the herembefore described steam generatoi
18 that, the pipe coils are during working never entuely filled with water,
but, in consequence of the rapid generation of steam, contain only steam in
their upper portions
Instead of using gas to heat the herein before descubed generator it may be
preferred to use solid combustible, in this case the bottom of the combustion
chamber B may be omitted and there may be substituted for the cylindrical
base a fire-giate furnace from which the hot gases will 118e and enculate
around and between the steam generating tubes
The steam genciator just described 18 especially adapted for the generation
of low-pressure steam, in order to make it available for the generation of
high-pressure steam the
space above the water-level in the feed-water chamber A
may, as shown in Fig 3, be connected with the interior of the steam-chamber C
by a pipe a so that the pressure of the steam in the space above the water-level
in the feed-water chamber A and that in the chamber will be equalized.
There will thus be no hindiance offered to the passage of the water from the
coiled water tube forming the combustion chamber B or from the water
jacket into the coiled steam generating pipes d, on the contrary, the water will
be forced into the steam generating pipes by the head of water in the feed
water chamber A.
A great simplification 18 effected in the modification shown in Fig 4, in which
the feed water chamber A is dispensed with and the water jacket surrounding
the combustion chamber B 16 constructed in such dimensions as to serve also
as a feed water reservoir A*. In this case the combustion chamber B is closed
at its upper end by a plate to which may be attached one or several pipes for
leading away the combustion gases from the chamber B This simplified con-
struction is very effective inasmuch as the water in the combined Jacket and
feed-water chamber A* is exposed to the heat developed in the combustion
chamber B, so that such water is subjected to a considerable preliminary heating
and therefore enters the steam-generating pipes d in a vei hot state.
For such purposes as household use, for example, where the apparatus is
requned to be very simple in operation and to need very little and only un-
skilled attention, the steam generator just described may be modified as shown
in Fig 5, so that the feed water chamber is divided and reduced so as to be in the
form of two (or more) upright cylinders A*, A*, which may, as shown, be

page_text: provided with removable cover and placed on a common base plate G, whilst
the steam chamber C 18 shaped somewhat like a closed bell, arranged with its
its wide part upmost In the example shown, the steam chamber C 18 su-
rounded by two spial generating pipes d', &, connecting it with the upught
cylinders A, A*, one end of each pipe being connected to the bottom of a
water cylinder and the other end to the top of the steam chamber C Spal
coils such as shown in Fig 5 may be employed in generators constructed as
herein before described with reference to Figs 1 to 4
The heat necessary for the evaporation of the water within the tubes d¹,
18 furnished by a ring-shaped burner L at the bottom of the steam chamber C
and passes upwards through on amongst the coils of the generating pipes
In
lieu of this ring burner separate buineis may be employed In the arrangement
shown in Fig. 4, or the modification thereof shown in Fig 5, the radiators in
the 100ms heated by steam from the chamber C may be connected with the
feed-water chamber o1 chambers A", so that the water of condensation which
forms in the said radiators can flow back into the feed-water chamber or
chambers This renders the e-filling of the chamber or chambers A* seldom
necessary.
Having now particularly described and ascertamed the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim 18:―
1 steam generator specially adapted for the production of low-pressure
steam, in which a feed-water chamber A supplies the water to a coiled water
tube on a water jacket which forms or suiiounds a combustion chamber B
situated immediately below the feed-water chamber and from which the water
passes through thin generating tubes d exposed to the heat and reaches in the
form of steam a ateam chamber C projecting into the combustion chamber B,
the gases from which are used for the preliminary heating of the feed water in
the feed water chamber, substantially as hetembefore described with reference
to and shown in Figs 1 and 2 of the accompanying drawings
2.A steam generator, especially adapted for the production of high-pressure
steam in which the space above the water level in the feed water chamber A 18
connected with the steam chamber C by an equalizing tube a* so as to equalize
the pressure of steam above the water level in the chamber A and in the steami
chamber for the purpose of obtaming a free enculation of the water to the
generating tubes & substantially as herembefore described with reference to
and shown in Fig 3 of the accompanying drawings
3A steam generator according to Claim 1, in which the feed water chamber
18 dispensed with and the jacket A* surrounding the combustion chamber B 18
made in such a manner as to serve also as a feed water chamber, so that a high
preliminary heating of the feed water will be effected by the heat produced
within the combustion chamber substantially as described with reference to
and shown in Fig 4 of the accompanying drawings
4-A steam generator according to Claim 3 except that the feed water
chamber is in the form of separate upright cylinders A*, subsantially as herein-
before described with reference to and shown in Fig. 5 of the accompanying
diawings.
5. Steam generators constructed, arranged and operating as herembefore
described with reference to and shown in Figs 1 and 2 Fig 3. Fig 4, and
Fig. 5 respectively of the accompanying drawings.
Dated this 28th day of Serveminer LOSHI
TAM NAI LOSH
F WISE HOWORTII.
46, Lincoln's Inn Fields, London, WC,
Agent for the Applicant