Improvements in and relating to Injectors.
Year: 1897

page_text: Date of Application, 19th Aug., 1897- Accepted, 2nd Oct., 1897
COMPLETE SPECIFICATION.
Improvements in and relating to Injectors.
I, BERNHARD FRÖHLICH of Marktstrasse 20, Leipzig-Neustadt, in the German
Empire, 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:―
In injectors at present employed in which a steam jet is used to force or expel
the water or the like, the relation between the areas of the water passage and the
steam passage has been constant. This has been one of the chief causes of their
inefficiency, as naturally, an alteration should be made in the relative proportions
of the passages, upon, for example, an alteration in the steam pressure.
In an injector constructed according to these improvements the steam nozzle is
made adjustable.
The accompanying drawings illustrate one form of my improved injector,
Figure 1 showing it in elevation and Figure 2 showing it in section.
The end of the steam nozzle a terminates within the body of the injector b at a
point where the latter is coned or tapered. It is secured by being screwed into the
lower branch e and may be held in any desired position by means of the lock nut i.
c and d are respectively the inlet and the outlet branches of the injector. k is a
loose nut by means of which the steam jet may be connected to a steam pipe.
It will be evident on referring to the drawings that the distance x, x, between
the mouth of the steam jet and the body of the injector will be varied as the
position of the jet is varied, and that the area of the annular passage through
which the water passes will be decreased as the nozzle a is raised and increased
as it is lowered.
As high pressure steam is capable of raising a greater quantity of water than
low pressure steam is, the nozzle a will be lowered by being unscrewed in the
branch e so as to increase the area of the annular water passage when high pressure
steam is employed. On the other hand if the steam pressure is low the area of the
water passage will be reduced by screwing the nozzle a inwards or upwards.
An injector constructed as described and properly adjusted will always work in
an efficient manner and the steam will be thoroughly utilised without waste.
Apart from its adaptability to varying steam pressures the improved injector
possesses advantages when used under other conditions. An example of this will
be found in its use for raising liquids of different specific weights. The annular
passage would be contracted for a heavy liquid and expanded for a light one.
The nozzle may also have its position adjusted according to the temperature of
the liquid which is being raised, or according to the velocity which it is desired to
impart to it.
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. In an injector of the type set forth, an adjustable steam nozzle constructed
and arranged substantially as and for the purpose hereinbefore described and as
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page_text: 2. An injector constructed and arranged substantially as hereinbefore described
and as illustrated by the accompanying drawings.
Dated this 18th day of Anoust AD 1897
W. E. HEYS & SON,
Agents for the Applicant.