Improvements in or relating to Centrifugal Separating Machines.
Year: 1897

page_text: Improvements in or relating to Centrifugal Separating Machines.
I CARL FRIEDRICH BERTRAM of 1 Büttelstädter Strasse 38 Weimar 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 :-
This invention relates to the construction of a helical interior part for centrifugal
machines such as are employed in the separation of milk-which is hinged and
serves to throw up and skim the milk.
This invention is illustrated in the accompanying drawings, Fig. 1 being a sectional
elevation of the interior of a centrifugal machine.
Figure 2 shows the device in plan partly opened out, and
Figure 3 a vertical section through part of the inner part.
In order to obtain in centrifugal machines especially in those for separating milk a
better effect, by dividing the liquid into thin layers and thus obtain a better division
the use of circular or helical inner parts has been suggested. Such parts have
hitherto consisted of a continuous strip of metal bent or formed as a screw with
threads at an angle to the axis and partially overlapping one another.
Such strips
have the drawback that they can be drawn out or uncoiled only very little and
accordingly can be carefully cleaned only on the upper and lower edge, but not over
their whole surface.
In order to enable such a strip formed into a screw to be thoroughly cleaned each
complete thread is according to the present invention composed of several sections,
which may be perforated as at e, connected by hinge-joints c d d so that the strip
can be unwound in the opposite direction so as to allow the upper and lower side of
the strip to be wholly exposed whereby it may be thoroughly cleaned when required.
The helical inner part according to the present invention is therefore made in the
shape of a continuous spiral a Figure 1 which possesses a partially continuous lower
edge b and in which the adjacent radially divided sections of each thread or ring are
connected together by hinge joints c d d. Owing to the arrangement of the hinges
such a spiral can be easily opened up and then thoroughly cleaned on both
sides.
As however the separate parts are attached to each other by hinges c d d they
can be easily closed up again and the coiled up metal strip easily introduced into
the drum of the centrifugal machine, the spiral or helical coil fitting in the drum
owing to the elasticity of its separate coils and being fastened in the drum in the
usual manner. The hinges cd have an advantageous effect as they act as stops
or baffles for the milk to be separated and also aid the action of the drum. The
lower coil of the helical metal strip is preferably provided with a bottom ƒ bent
inwards.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is―
1. In a centrifugal machine for the treatment of milk and other liquid, a helical
inner coil, as a formed of a series of sections connected together by hinge joints
which preferably project from the plane of the strip and serve as baffles for the liquid
to be treated substantially as and for the purpose described.
2. The combination and arrangement of parts constituting the complete separating
coil for centrifugal machines substantially as described and illustrated in the
accompanying drawings.
n..
h: 10th dr. of Tum 1907
BOULT & WADE,
Agents for the Applicant.