Improvements in or relating to Inner Structures for the Drums of Centrifugal Machines.
Year: 1898

page_text: Date of Application, 3rd Jan., 1898-Accepted, 12th Mar., 1898
COMPLETE SPECIFICATION,
Improvements in or relating to Inner Structures for the Drums of
Centrifugal Machines.
I, OLOF OHLSSON, of Corner of High and Orange Streets, Newark, New Jersey,
United States of America, Mechanician, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
The inner structure for the vessels of centrifugal apparatus, which forms the
object of the present invention, consists of plates, which, joined together or not,
and inserted in the centrifugal vessel, form a kind of pyramid surrounding the
centre line of the said vessel, and either being truncated or having its corners faced
off, or both, said plates along the edges nearest the periphery of the vessel being
provided with perforations, apertures or inter-spaces through which the liquid
say milk, can enter from the space surrounded by the plates to the spaces out-
side said plates. A portion of the cream is secreted in the inner space; another
portion however, passes with the milk through the perforations mentioned to the
outer spaces where the centrifugal force is greater, and is separated from the milk
and forced toward the centre or against the plane sides of the plates where it finds
no passage to the interior or adjoining space, being therefore compelled to rise
along the outer side of the plates and over their upper edge or through apertures
at the latter to the cream-outlet. The arrangement mentioned, viz., the forming
of the plates into a pyramid, facilitates the motion of the cream along their sides.
The inner structure mentioned is illustrated in the annexed drawings where
Figure 1 shows in a vertical section a centrifugal vessel provided with such a
structure or pyramid and Figures 2 and 3 are transverse sections made at different
heights, while Figure 4 shows a separate view of the pyramid. Figure 5 illus-
trates how two or more such pyramids, placed one above the other may form the
inner structure of the centrifugal vessel. Figure 6 shows combinations of square
pyramids inserted one into the other, one combination being arranged above the
other or others.
Figures 7 and 8 are transverse sections of the last-mentioned inner structure
taken at different heights.
a
According to Figures 1 to 4 the inner structure 1 consists of plates combined
into a shell surrounding the central axis of the centrifugal vessel 2 and forming
kind of truncated pyramid with its corners faced off, said pyramid being pro-
vided at the corners with apertures or perforations 3 through which the liquid can
pass from the inner to the outer sides of the plates.
.
In Figure 5 an inner structure is shown consisting of two pyramids of the kind
illustrated in Figures 1 to 4, said pyramids being arranged one above the other
but not inserted into each other. The arrangement may however, be so contrived
that two or more pyramids, are inserted into one another in such manner that the
corners of an inner pyramid bear against the sides of an outer one, as seen in
Figures 7 and 8 which show square pyramids 1 inserted one into another. Finally
combinations of pyramids inserted into one another may be arranged one above the

page_text: other or others in the manner just referred to, see Figure 6, which corresponds
to Figures 7 and 8.
It should be noted that the plates of the inner structure may be slightly bent
or bulged toward the centre, as shown at 4 and 5, Figure 2. As regards the
chamber for the reception of the liquid, which is usually located below the inner
structure of a centrifugal vessel, the said chamber can communicate
both with the inner space of the inner structure and with the spaces
outside the latter: in the example shown, however, the partition between
the receiving-chamber and the interior of the centrifugal vessel only,
is provided with apertures 7 leading to the interior of the inner structure,
while the portion of said partition which separates the receiving-chamber and the
spaces situated outside the sides of the inner structure is not perforated. In case
of several pyramids inserted into one another the perforations of the partition may
preferably lead to the inmost compartment of the inner structure. With pyramids
arranged one above the other or.others only the lowest inner structure is, preferably,
provided with the partition in question, while with pyramids inserted one into the
other the unperforated part of the partition may be provided at the bottom of all
the outer ones and, with combinations of pyramids inserted one into the other and
arranged one above the other, preferably only at the outer ones of the lower com-
bination.
Finally, it should be mentioned that the inner structure referred to may be
introduced into a special cylinder which is placed in the vessel of the centrifugal
apparatus.
Among the advantages of such an inner structure should be mentioned that
the particles of cream secreted in the outer spaces said particles being comparatively
small, are crowded or pressed together, at their passage along the plates toward
the truncated end of the pyramid so as to unite into larger particles of compara-
tively greater floating power, the skimming power of the apparatus being thus
increased.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. An inner structure for centrifugal apparatus composed of plates united so as
to form a connected shell or not, and inserted into the centrifugal vessel in the
form of a pyramid surrounding the centre-line of the latter and being either
truncated or having its corners faced off, or both, said plates being provided at
their edges next to the periphery of the vessel with perforations or interspaces sub-
stantially as described.
2. Inner structures for centrifugal vessels of the character described having their
plates slightly creased or bulged toward the centre substantially as described.
3. In inner structures for centrifugal apparatus of the character described the
arrangement of two or more shells or pyramids one above the other or others sub-
stantially as described.
4. In inner structures for centrifugal apparatus of the character described the
arrangement of two or more shells or pyramids inserted one within the other in
such a manner that the corners of one inner shell bear against the sides of an
outer shell.
5. In inner structures of the character described the arrangement of two or
more combinations or groups of shells inserted one within the other located one
above the other in the vessel substantially as described.
6. In inner structures for centrifugal apparatus of the character described, the
arrangement that the spaces outside the sides of the inserted shell or pyramid
are separated at the bottom. by means of a partition from the chamber for the
reception of the liquid in the centrifugal vessel, said partition when using shells
located one above the others being provided if desired at the lowest shell only, and
when using shells inserted into one another, being provided at the bottom of all

page_text: the outer shells or if desired in the case of superposed groups being provided only
at the lowest group or combination, substantially as described.
7. The combination and arrangement of parts constituting the complete inner
structure for centrifugal apparatus substantially as described, and illustrated in
Figures 1, 2, 3 and 4 or in Figure 5 or in Figures 6, 7 and 8 of the accompanying
drawings.
.. 01-1
Dmhan 1007
BOULT & WADE,
Agents for the Applicant.