Year: 1886

page_text: Date of Application, 9th June, 1886.
Complete Left, 5th Mar., 1887.
Complete Accepted, 5th Apr., 1887.
I, WILHELM SCHMIDT of Braunschweig, in the Empire of Germany, Engineer, do
hereby declare the nature of this invention to be as follows:
The heat regulators for high pressure tubular steam boilers hitherto known have
required to be of large volume; also the high pressure steam has to be reduced to the
required tension by various suitable means.
The object of this invention is to lessen the size of the heat-accumulator and
regulator as much as possible and to decrease the tension of the high-pressure steam
from the high-pressure tubular boiler without loss of power. For this purpose, the
steam flowing out of the high pressure tubular boiler is caused to pass through an
injector nozzle and draws with it thereby a vapour of low tension, such as air or
exhaust steam, the mixture resulting therefrom, that is a steam of a certain mean
tension, passes into the heat reservoir and mixes with the contents of the same.
The heat reservoir, which is filled with water, is therefore under the same pressure,
as the steam mixture entering from the injector, and by this perfect union of the
mixed vapour from the injector with the contents of the reservoir, a perfect transfer of
any superfluous heat from the injected vapour to the reservoir is insured even if the
latter is of small size. On the other hand however, the high pressure steam is also
reduced to a useful mean tension, and at the same time increases in volume by means
of the steam sucked in by the injector.
Therefore this high pressure steam is utilized in three different ways; firstly it
serves for the compression of vapour to a useful tension and at the same time increasing
its volume; secondly, the heat generated by the action of the injector blast is
accumulated in the reservoir and thirdly this heat is used for the generation of
auxiliary steam from this reservoir. The heat accumulated in the water volume of
the reservoir need therefore not be retransferred to the steam, since when the tension
from the high pressure tubular steam generator diminishes, more reserve steam is
generarated from the heated water of the reservoir, whereby the lessened effect of the
injector blast is compensated

page_text: The invention is performed as follows:
The steam from a high pressure tubular steam generator passes by a suitable pipe
(in which may be inserted a steam pressure gauge) to the nozzle of an injector. The
steam under pressure of about 60 atmospheres (the practical experiments with Perkin's
spiral tubes have sufficiently proved the applicability of this high tension in the
present arrangement of the tubular steam generator) sucks up, from a feed tube, the
waste steam, gas or air of any suitable tension (such tension being produced by
compression by means of pumps) and the steam mixture thus formed enters a spiral
tube immersed in the water in the reservoir and passes out at the further end into the
upper part of this chamber, which serves as steam reservoir, filled with water. By
this means the steam mixture produced by the injector transfers its high temperature
to the spiral tube and thereby to the water of the reservoir. In lieu of a spiral tube
leading through the water in the reservoir, this tube may also directly terminate in
the water space of the reservoir, by which means the steam mixture forced in by the
injector is blown directly into the water of the reservoir and thus heats the water,
though a violent agitation is thereby occasioned.
A special arrangement serves to indicate the temperature of the steam proceeding
from the high pressure tubular steam generator and thus enables the stroke of the
feed pump for the high pressure steam generator to be controlled, that is to say, the
feeding to be regulated.
This arrangement consists of a vessel introduced into the tube conveying the high
pressure steam to the injector and coming in contact with the steam; this vessel is
filled with liquid, for instance water and is connected with a manometer situated
outside and indicating the temperature of the steam passing through.
A device is also used to ensure a deposition of the impurities from the feed water
and consists of a vessel, into which the cold feed water is caused to enter below, being
slowly heated in the said receptacle by a spiral tube passing down through the same
and through which hot water runs from the bottom of the steam reservoir to a pipe
serving to feed the high pressure steam generator; this feed water for the generator
deposits its sediment in the said spiral tube and is fed through the feed pump or other
contrivance to the steam generator. Also, by thus heating the cold water, which
enters below, it is, when running to the reservoir, freed from sediment.
The heat reservoir may also be adapted to be heated by the fire as well as the high
pressure steam generator.
This arrangement is especially adapted for marine boilers. The arrangement and
combination in general, of the high-pressure steam generator, injector and reservoir
boiler are the same as in the first modification.
Dated this 9th day of June 1886.
HERBERT & Co.,
67, Strand, Agents.

page_text: I WILHELM SCHMIDT, of Brunswick in the Empire of Germany, Engineer, 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 hereinafter described improvements in steam generators consist of a combination
of a high pressure tubular steam generator with a low pressure reservoir or boiler in
such a manner that the steam issueing from the high pressure steam generator draws
up on its course to the low pressure boiler, a gas of a low tension (either air, exhaust
steam from a steam engine or steam partly expanded in the cylinder of a steam
engine) and conducts the mixture resulting from this injector-action through the
water space of the low pressure reservoir through a pipe or suitablo means and
subsequently injects it into the said low pressure reservoir or boiler.
By this combination of high and low pressure steam generators, not only is the
application of steam at very high pressure allowed and its reduction to a useful
tension produced in a simple manner without considerable loss of effect; but also an
indirect heating of the low pressure steam generator is obtained conducive to the
safety of the locality so that the said low pressure generator forms a heat reservoir
and regulator which is adapted to compensate any excess or diminution of heat
resulting from fluctuations of the fire or other cause. While however the high
pressure steam is reduced without great loss of effect to a useful mean tension the
same process causes a gas of lesser tension to be compressed and thereby rendered
useful for the generation of power. The caloric generated or freed by the action of
the injector from the high pressure steam is imparted to the water in the low pressure
steam generator by the passage of the steam mixture through the latter so that the
same is heated and steam generated therefrom. The manner of action and com-
bination of this arrangement is as follows:
Referring to the accompanying drawings in which Figs. 1 and 2 are vertical
sectional elevations showing two forms of the improved combination.
By heating the high pressure steam generator H the generated steam passes through
the pipe y and the special apparatus g hereinafter described to the nozzle of the tube d.
Flowing from the latter, the high pressure steam sucks through the pipe air or
steam of a low pressure and carries the same with it into the tube S. The mixture
resulting therefrom possesses a mean tension between that of the high pressure steam,
and of the gas drawn up, and it passes through the pipe S suitably extended as for
instance in the form of a spiral in the water space of the low pressure steam
generator and opening into the steam space of said generator. The steam mixture
transfers its excess of caloric, while passing the spiral S to the water of the low
pressure boiler, so that the latter also generates steam in consequence of this indirect
heating and the thus generated steam together with the steam mixture entering
through the open tube S is accumulated in the steam chamber of the boiler and may
be employed for driving the steam engine or other purpose.

page_text: When the heating of the fire on the high pressure generator is diminished, the
pressure at the steam nozzle d likewise decreases and the actions of the injector is
diminished so that less steam is drawn up from the pipe and the mixture having a
smaller excess of caloric. In this case the previously heated water in the low pressure
boiler generates steam at this lower tension and thereby compensates for the
decreasing effect of the injector blast and of the high-pressure steam generator.
In lieu of a spiral tube S leading through the water in the reservoir e, this tube
may also directly terminate in the water space of the reservoir by which means the
steam mixture forced in by the injector is blown directly into the water of the
reservoir and thus heats the water, though a violent agitation is thereby ocensioned.
A special arrangement serves to indicate the temperature of the steam proceeding
from the high pressure tubular steam generator and thus serves as a guide for
adjusting the feed of water to the generator. This arrangement consists of the
vessel g introduced into the pipe conveying the high-pressure steam to the injector
and coming in contact with the steam; this vessel is filled with liquid, for instance
water and is connected with a manometer m, the manometer indicating the temperature
of the steam passing through. The same means are also applicable for automatically
indicating when a maximum temperature is reached by suitable known means.
device is also shown in Fig. for freeing the feed water for the generators from
impurities, it consists of a vessel B into which the feed water enters below at = and in
which it is heated by the worm p which is a continuation of the pipe o by which
water is drawn from the low pressure water v, for the feeding of the high pressure
generator H. The cold feed water entering at deposits sediment in B and passes
into the bottom of the low pressure boiler v, where it is further heated and passes into
pipe o and worm where it is cooled and feeds the high pressure generator as shown.
As shown by Fig. 2 the low pressure generator may also be adapted to be heated
by the fire as well as the high pressure steam generator.
This arrangement is especially adapted for marine boilers. The arrangement and
combination in general, of the high pressure steam generator injector and low pressure
boiler are the same as in the first modification.
The flue or tube receiving the fire-bars T to be lined with a coating of fire-brick
to prevent excessive direct heating of the reservoir and to preserve the main effect of
the furnace for the tubular steam generator.
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. The process of sucking up by the steam from a high pressure steam generator,
a gas of low tension by means of an injector and causing the mixture to act on the
water contained in a low pressure steam generator, substantially as and for the
purpose set forth.
2. In the process mentioned in Claim 1, the application of a heating tube for
conducting the steam mixture through the water space of the low pressure steam
generator into the steam space of the same for the purpose of indirect heating of the
low pressure boiler without agitation of the water, and of production of dry steam,
substantially as set forth.
3. In the process mentioned in claim 1, the arrangement of a flue finside the
reservoir for receiving the firing for the high pressure tubular boiler.
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