Pasteurizing Milk and other Liquids.
Year: 1895

page_text: Date of Application, 7th Oct., 1895--Accepted, 7th Dec., 1895
Pasteurizing Milk and other Liquids.
A communication from Huco DAVIDSON, of 51 Kungsgatan, Gottenburg, in the
Kingdom of Sweden, Merchant.
I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chattered Patont Agent do hereby declaro 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 an apparatus for sterilizing or pasteurizing milk and
other liquids, which apparatus consists of a number of vessels placol the one in the
other and communicating in such a manner that the liquid to be sterilized passes
through part of the apparatus, while a heating fluid circulates more or less quickly
through other parts of it, in order to determine the temperature necessary for the
operation.
The apparatus, which can be made in different dimensions for household purposes
ot for use in danes, infirmaries for example 18 represented in the annexed drawings,
wherein,
Fig. 1 shows the apparatus half in elevation and half in section.
Fig 2 is a sectional plan thereof on the Ime - of Fig. 1. and
Fig 3 is a plan of the apparatus with part of the cover broken away.
Three vessels ab and c are placed in each other. The middle vessel a 13 designed
for receiving the liquid which is to be sterilized by heating, and the two other
ves-els b and c receive the heating flund
To a cential opening in the bottom of the middle vessel a there is fixed a some-
what conical socket e with two lateral openings lying diametrically opposite cach
other. This socket e is prolonged into a cylindrical tube d closed at the top and
protinding above the top level of the vessel c.
The two other vessels and c communicate with each other by means of a
peculiar arrangement of cocks, as described below
From a cential opening in the bottom of the uner vessel b there rises a cylindrical
tube h, provided with a loose funnel y and sounding the tube d at a certain
distance. In its lower part this tube supports, by means of two tubular arms 18,
a socket k, the net, somewhat conical, su face of which fits to the outer corre-
spondingly shaped surface of the tube e in the middle vessel a, the tubular arms i
corresponding with the openings ff of the socket e, thus constituting a double cock
allowing a tree communication between the outer and uner vessels c and b
respectively and preventing the liquid in the vessel a from coming into contact with
the fluid in the vessels b and c
The vessel a, intended to receive the milk or other fluid to be sterilized, is in its
upper part provided with a discharging pipe o passing through the wall of tho
vessel c. This vessel c is also provided with a pipe p
is placed an annulat, closed cylinder r. The covers 16
ab shown in the drawing, to the three vessels a band e
In the inner vessel there
adapted to the vessel a or,
In the tube is placed the
funnel g with a strainer t. The vessels may rest upon each other by the handles mm,
Γ
01

page_text: which are held in position by the bayonet-clutches a n. In the wall of the vessel b
there is a fluting » for a thermometer.
The working of the apparatus is us follows,-
After the liquid to be sterilized has been poured through the funnel g, it flows
downwards through the annular space between the tubes d and and further round
the tubular arms and the socket into the vessel a where it ascends. The milk,
or other liquid, flows out of the vessel a by the pipe o and is led thence into a
refrigerator, which may appropiately be of the same construction as the apparatus
above described.
The pipe discharges the surplus of heating fluid, in order to regulate the
temperature in the vessels b and c, fresh water being again let into the inner vessel.
If all the vessels are covered, the covers can be provided with an inlet-pipe or the
tube d can be open at its top and communicato with a foeding tube or condunt. The
cylinder, filled with air, is intended to reduce the waste of heat necessary for
the operation, the air in the cylinder on account of its lower capacity for heat,
requiring less leating than an equal volume of fluid. The covers prevents the
liquid from being infected by the micro-organisms of the air The strainer { is
intended to retain solid matters accompanying the liquid.
On warming the liquid in the vessel a, this liquid will (on account of the narrow,
annular space it occupies in the interior capacity thereof the relatively large
surface of this vessel) be quickly brought to the desired temperature, which can
be maintained until the different microbes are considered to be exterminated or
neutralized.
The apparatus designed for household use may be of smaller dunensions and
the pipes may be dispensed with. After the heating is finished the vessel a
together with the vessel b 15 lifted out of the bath, which will then flow down
into the vessel c.
In operating upon a liquid of a lugher boiling temperature, a fluid of a coire-
spondingly high boiling temperature such as oil, an appropiate solution or the like,
can, if required, be employed in the vessels band c.
Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondent, and in what manner the
same is to be performed, I declare that what I claim is;—
1. An apparatus for sterilizing or pasteurizing milk and other liquids consisting
of three vessels a be placed in each other of which the two outer vessels a and c are
provided with discharging pipes o and picspectively and the outer and inner
vessels c and communicate in such a manner that the heating fluid circulates
through them and can be discharged by the pipe while the liquid to be sterilized
is led through the middle vessel a and the pipe o uto a refrigerator substantially as
herein before described and shown in the drawing
2 In an apparatus such as claimed in Claim I the arrangement that the middlo
vessel a has a central socket e with openings ff (diametrically opposite cach other)
and with a rising tube d closed at the top and that the inner vessel has a central
tube surrounding the tube d and by means of tubular branches supporting a
sucket fitting to the socket e the whole having for object to allow the warm fluid
poured into the vessel to anive through the tubular bianches and the corre-
sponding openings into the vessel c while the liquid to be sterilized is poured by
the funnel and passes through the annular space between the tubes d and h into
the vessel a substantially as set forth and shown.
3 In an apparatus as claimed in Claims 1 and 2 a covers adapted to the vessel a
or to the three vessels a b and c substantially as set forth and shown.
4 In an apparatus as claimed in Claims 1 and 2 an annular cylinder placed in
the inner vessel band tended to diminish the necessary quantity of heating fluid
substantially as set forth and shown in the drawing.
5 In an apparatus such as is claimed in Clans 1 and 2 a strainer & placed in the
funnel y at the top of the tube substantially as set forth and shown

page_text: 6. The combination and arrangement of paits (with or without the cylinder r)
constituting a complete sterilizing apparatus substantially as and for the purpose
herein before described and illustrated in the accompanying drawings.
Dated the 7th day of October 1905
BOULT & WADE,
Agents for the Applicant.