Improvements in Pasteurizing Apparatus for Milk, Cream, or the like.
Year: 1894

page_text: Date of Application, 24th Sept., 1894-Accepted, 3rd Nov., 1894
COMPLETE SPECIFICATION.
Improvements in Pasteurizing Apparatus for Milk, Cream, or
the like.
I WILHELM PAASCH of Horsens, Denmark, 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 :-
The present invention relates to the employment of centrifugal action produced
by a rotatory agitator placed in a pasteurizing apparatus for milk, cream or the
like, for elevating the liquid to a greater height than the level of the afflux.
The invention is illustrated by way of example in Figures 1 and 2 of the accom-
panying drawing, which shows the feed-heater-vat respectively in vertical and
in horizontal section whilst Figure 3 shows the lower part of the agitator-in
cross section on line x-y (Figure 2)-on a larger scale; but the arrangement
may, however, be varied according to circumstances.
The pasteurizing vat F is enclosed in a steam-jacket K and provided at the
upper part with an inwardly inclined rim E which is however only necessary
when the liquid is to be elevated above the height of the outlet from the vat.
An agitator V keyed on a vertical axle A, mounted to revolve in the vat is
provided with pallets or blades V₁ and V2 that impart to the liquid rotatory
motion, the speed of which is dependent on the velocity of rotation of the axle.
The outlet may suitably be placed tangential to the circumference at the upper
part of the vat as at a, with its mouth opposed to the direction in which the
liquid moves so as to offer the least possible resistance to the outflow of the
rotating liquid through the outlet-pipe.
The inlet I is placed at the centre of the bottom of the vat where the
resistance to the inflow will be lessened by centrifugal action and not increased
so as to hinder the inflow as would be the case if the inlet where placed in the
circumference.
At the lower end of the agitator there may be placed a horizontal plate S
coned at the centre towards the pivot of the agitator and provided with slanting
wings on the lower side, which at once catch the liquid coming up through
pipe I, and carry it out towards the circumference without producing any foam
or froth. The said plate S may also be placed in a recess countersunk in the
below the bottom
bottom of the vat or in an enlargement of the inlet tube
of the vat and on a prolongation of the axle A of the agitator. When the
agitator is rapidly revolved the liquid will be sucked in towards and caused to
rise along the sides of the vat, the surface of the liquid becoming more and
more hollow. Were the velocity of rotation increased and no outlet available
for the liquid the latter would reach right up to the inwardly projecting rim B
above, but owing to the centrifugal-force, the liquid will remain at the circum-
ference and not find its way out through the opening around the axle. The
centrifugal force will, on the other hand, force the liquid out through the pipe R
ou the side of the vat and the liquid may there be elevated to different heights
according to the velocity of the rotation.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performned I declare that what 1
claim is
1. In pasteurizing apparatus for milk, cream or the like consisting of a vat (F)
in which an agitator (V) is mounted to rotate on a vertical axle (A) the com-
nallets (V V2) so as by the
of brand blades or

page_text: agitation to generate centrifugal force and apply it for elevating the fluid above
the level of the vat as specified.
2. In the pasteurizing apparatus specified under Claim 1 the agitator (V) provided
at the lower end with a horizontal plate (S) furnished on the underside with
blades (v) which at once catch hold of the liquid entering at the central inlet (I)
and set it in rotation as specified.
3. The modification of the arrangement specified under Claim 2 which consists
in arranging the plate (S) within a recess countersunk in the bottom of the vat
or in an enlargement of the inlet-tube (1) below the bottom of the vat and on
a prolongation of the axle (A) of the agitator as specified.
4. In the pasteurizing apparatus specified under Claim 1 the vat (F) provided
with an inwardly inclined rim (B) so as to prevent the liquid from running over
if it is to be elevated to a greater height than the vat.
5. In the pasteurizing apparatus specified under Claim 1 the arrangement of
the outlet (a) at the upper part of and tangential to the circumference of the
vat (F) with its mouth opposed to the direction of motion of the liquid so as
to offer the least possible resistance to the motion of the rotating fluid through
the outlet.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.