Improvements in Jet-pumps.
Year: 1895

page_text: Date of Application, 7th Aug., 1895-Accepted, 12th Oct., 1895
Improvements in Jet-pumps.
1, PAUL HÜTTEMANN, of Aprath, in the Province of Rhine, German Empire,
Manufacturer 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 refers to jet-pumps, as used for the locomotion of semi-fluid and
dirty or soiled liquors by means of steam, water or air; my improvements in
pumps of said kind relate to a special arrangement and combination of parts, as is
hereinafter more fully described; and the purpose of my improvements is to
provide a straight way for the liquor flowing through the apparatus, and to
prevent the latter from being clogged even if the dirtiness of the liquor is a rather
strong one.
In order to make my invention more clear, I refer to the accompanying drawing,
in which similar letters denote similar parts throughout the different views, and in
which:
Figure 1 is an outer view of my improved jet-pump; Figure 2 is a longitudinal
section through the same; taken on line 7-8 Fig. 3.
Fig. 3 is an end-view of the pump, showing the inlet of the latter:
Fig. 4 is a view of the inner end of the main-portion of the pump-casing;
Fig. 5 is a cross-section taken on line 9-10 of Fig. 1, and
Fig. 6 is a view similar to Fig. 4, but showing a modification.
My improved jet-pump is constructed as follows: The casing a, the end a¹ of
which forms the inlet for the liquor, contains, or embraces, the pipes b, the ends b¹
of which are contracted so as to form nozzles; said ends, or nozzles b¹ respectively,
project beyond the open side of the casing a, and take into correspondingly shaped
apertures of a casting c; the latter is connected with the casing a by means of the
screw-cap d, and has fixed to it some tubes e, the number of which corresponds to
the number of the pipes and nozzles 6 6. Said tubes e terminate into a casing f,
which forms the outlet for the liquor propelled.
There is between each of the nozzles and the opposite walls of the apertures of
the casting cleft a small annular space, through which the driving medium (stean,
water or air) on its way from the casing a to the tubes e, or to the casing f
respectively, is compelled to pass. The velocity of those portions of the driving
medium that pass through said small annular spaces is, as a matter of course,
a very great one, and said portions of the driving medium are, moreover,
brought very near to the liquor, so that their action upon the latter is a very
powerful one.
In order to still more increase the efficiency of the apparatus, I prefer to make
the exit-ends of the nozzles b' as thin and sharp as possible; but in this case
I provide said nozzles with either a number of small ribs (as indicated in Figs. 2
& 4) or with a few large ribs (as indicated in Fig. 6), so that in spite of the slight
thickness of metal of the nozzles the strength and resistibility of the latter is not
decreased.
I call special attention to the fact, that the tubes e extend exactly in the
direction of the pipes and nozzles 661; therefore, the flow of the liquor through
the apparatus is not in the least impeded, and the liquor to be propelled may be
even very dirty or soiled, without being able to clog any part of the pumps.

page_text: I wish it to be understood, that I do not confine myself to the use of but three
pipes and nozzles bb, but that I reserve to myself the right of using any number
I may think suitable for any given object.
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. In a jet pump, the combination with one or more pipes 6 having nozzles b³,
and being enclosed by a casing a, of a casting or body c taking with suitable
apertures over said nozzles, and holding one or more tubes e extending in the
direction of said pipes b; the interior of said casing a being connected with the
interior of said tubes e by small annular passages left between the said nozzles and
the opposite walls of the respective apertures of said casing or body c, for the
purpose as described.
2. In a jet pump, the combination with one or more pipes 6 having nozzles b¹,
and being enclosed by a casing a, of a casting or body c taking with suitable
apertures over said nozzles, and holding one or more tubes e extending in the
direction of said pipes b; the interior of said casing a being connected with the
interior of said tubes e by small annular passages left between the said nozzles and
the opposite walls of the respective apertures of said casting or body c; the
nozzles having a slight thickness of metal, and being on their outsides furnished
with a larger number of small ribs, or a smaller number of large ribs, substantially
as described.
Dated this 3rd day of August 1895.
PAUL HUTTEMANN,
By Robert Deissler,
Agent for the Applicant.