A Sterilising and Preserving Apparatus for Milk and other Liquids.
Year: 1895

page_text: Date of Application, 21st Feb., 1895-Accepted, 23rd Mar., 1895
COMPLETE SPECIFICATION.
'A Sterilising and Preserving Apparatus for Milk and
other Liquids.
1, FRANZ ZWEIBÖHMER of Recklinghausen Westphalia, Germany, Physician,
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 apparatus-hereinafter described is designed for the sterilisation of milk and
other liquids, and its chief characteristic is that it allows of the sterilised milk
being drawn off in any quantity required without admitting impure air into the
vessel, thus preventing fresh infection of the remaining contents.
I will now describe the invention with reference to the accompanying drawings
in which, A, is the receptacle for the milk to be sterilised, which is fitted with an
annular trough on its upper edge, the interior side A', of which is higher than the
exterior side G.
This trough is filled up to the level of G, with a suitable liquid such as water to
which more or less glycerine has been added and in this falls the vertical rim D¹,
of the cover D, towards the bottom of which rim are a number of perforations e.
The apparatus A, is then placed for about forty-five minutes in boiling water
contained in a larger vessel W, and the milk or other liquid is thus sterilised.
Then the apparatus A, is taken out of the vessel W, and allowed to cool which
causes a rarefaction of the air in the interior of A, so that the outside air forces
down the liquid in the outside part of the trough G, A', to the level of the holes e,
and the impure air cannot get into A, without passing through the portion of the
said liquid in the inside part of the trough.
By this result the separation liquid is drawn into the inner annular space which
is formed by the part A', of the trough G, A, and the rim D', of the cover D.
For this reason the part A', is made higher than the part G, for if it were not the
separation liquid would overflow into the milk.
The air penetrates into the container as a result of the drawing off of the milk
as well as by the cooling of same, and this is repeated frequently as required. All
this air is to a large extent cleared of germs by the separation liquid, whereby all
infection is prevented, and the milk can be preserved for weeks or even months in
a receiver of this kind in an absolutely pure and wholesome condition, and without
losing any of its nutritive qualities.
For drawing off the milk any form of cock can be used. The one shown at v,
is that known in Germany as a "Meyer" but any other suitable arrangement can
be employed.
For liquids which form a deposit and which require stirring before drawing off,
an agitator R, may be used. This can be combined with the cover or lid D, D¹,
by means of a rod S, and a handle or knob f¹.
To stir the deposits either the agitator may be turned bodily with the cover or a
stuffing box may be formed so that the knob f¹, can simply be turned without
moving the cover. Either of these means will suffice to distribute the deposits
evenly through the liquid in the vessel A. The level of the liquid in the interior
of the receiver A, is indicated in the accompanying drawings by f.
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 :-
An
n-apparatus for sterilising and preserving milk and other liquids consisting of

page_text: a vessel furnished at bottom with a suitable cock or valve and at top with an
annular trough filled with a suitable separation fluid, such as a mixture of water
and glycerine. Into this trough enters the rim of a cover so as to leave about
half the trough uncovered, said rim being perforated so that when some of the
sterilised liquid or milk is drawn from the vessel the air entering from above is
forced to pass through the fluid in the trough by which means it is filtered and
sufficiently deprived of germs, microbes and the like, and the said cover may he
furnished with an agitator if desired as herein described and set forth.
Dated this 21st day of February 1895.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Agent for Applicant.