Apparatus for Heating Milk Prior to Separating the Cream therefrom, also Applicable for Destroying Germs therein and for Heating other Liquids.
Year: 1887

page_text: Date of Application, 19th Apr., 1887
Complete Left, 16th Jan., 1888
Complete Accepted, 17th Feb., 1888
Apparatus for Heating Milk Prior to Separating the Cream
therefrom, also Applicable for Destroying Germs therein and
for Heating other Liquids.
I, JENS FREDERIK OSCAR QVISTGAARD of Klara Norra Kyrkogata No. 11,
Stockholm Sweden, Inspector of Dairies, do hereby declare the nature of this invention
to be as follows:―
My invention has for its object the construction of apparatus for raising milk to
the temperature most suitable for separating the cream therefrom before submitting it
to the action of cream separators, which apparatus is also applicable for subjecting
milk toithe Pasteurizing process, for destroying germs, and generally for heating a
current of liquid as it flows from one receptacle into another.
The said apparatus is shewn on the accompanying drawing, in which Fig. 1. shews
a vertical section and Fig. 2 a plan of the same.
The apparatus in question is intended for heating milk, which is to be separated, to
the degree most suitable for the purpose.
Into a tank a of wood or of sheet iron coated with wood a tin vessel b of about
50. litres, capacity is placed in such a way that its bottom rests on a platform rising
from the bottom of the tank. To the tank a a lid d can be affixed by screws, which
lid clasps the neck of the vessel b and keeps it in its position. Through a ring e
fastened to the neck of the vessel a tube of tin fis pushed down to the bottom of the
vessel where it is cut off obliquely. Close under the neck of the vessel another tube g
project laterally somewhat beyond the tank a. A tube h leading to the separator i can
be pushed over this tube g.
The tank a is to be filled with water heated either directly or indirectly by means
of a steampipe k at its bottom.
The milk is filled in from a reservoir into the central tube f, enters the vessel b at
its bottom, and gets heated by the waterbath, flows upwards and runs out through the
lateral tube g to the separator. The milk gets thus heated as it rises in the vessel,
and only the uppermost layer has the temperature required for the separating operation.
By this contrivance the milk is heated very quickly and equally, and is kept warm

page_text: during the shortest possible time, which is of great consequence for the quality both
of the milk and of the cream and also affects the butter and the cheese.
By thermometers immersed into the milk and into the waterbath the temperature
of both can be controlled, the temperature of the latter being accurately regulated by
opening or closing the steam cock to the coil K more or less.
The milk in the reservoir / being exhausted, fresh milk, well cooled and separated,
is filled into it in a quantity equal to about one and a half times the capacity of the
vessel b. This milk being then run down through the tube fenters 6 at the bottom
and drives up the unskimmed milk out of the apparatus, leaving the separated milk
alone in the same after which the water is let off, and the vessel emptied.
If several separators are at work simultaneously the vessel a of feed-heater can be
of sufficient size to contain several apparatus 6 of the above described construction.
By imparting to the waterbath a higher temperature, the milk can be heated to
90° C. and the apparatus may serve as a Pasteurizing apparatus.
It is evident that the apparatus can likewise be employed for heating a current of
any other liquid.
ABEL & IMRAY,
Agents for the Applicant.

page_text: Apparatus for Heating Milk Prior to Separating the Cream
therefrom, also Applicable for Destroying Germs therein and
for Heating other Liquids.
I, JENS FREDERIK OSCAR QVISTGAARD, of Klara Norra Kyrkogata No. 11,
Stockholm, Sweden, Inspector of Dairies, 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:-
My invention has for its object the construction of apparatus for raising milk to the
temperature most suitable for separating the cream therefrom before submitting it to
the action of cream separators, which apparatus is also applicable for subjecting milk
to the Pasteurizing process for destroying germs, and generally for heating a current
of liquid as it flows from one receptacle into another.
The said apparatus is shewn on the drawing accompanying my Provisional Specifi-
cation dated 19th April 1887, in which Fig. 1 shews a vertical section and Fig. 2 a plan
of the same.
The apparatus in question is intended for heating milk, which is to be
separated to the degree most suitable for the purpose.
Into a tank a of wood or of sheet iron coated with wood a tin vessel b of about
50 litres or any other desired capacity is placed in such a way that its bottom rests
on a platform rising from the bottom of the tank. To the tank a a lid d can be
affixed by screws, which lid clasps the neck of the vessel band keeps it in its
position.
Through a ring e fastened to the neck of the vessel a tube of tin f is pushed down
to the bottom of the vessel where it is cut off obliquely.
Close under the neck of the vessel another tube g project laterally somewhat beyond
the tank a. A tube leading to the separator i can be pushed over this tube g.
The tank a is to be filled with water heated either directly or indirectly by means
of a steampipe k at its bottom. The milk is filled in from a reservoir into the central
tube, enters the vessel bat its bottom, and gets heated by the waterbath, flows
upwards and runs out through the lateral tube g to the separator.
The milk gets thus heated as it rises in the vessel, and only the uppermost layer has
the temperature required for the separating operation.
By this contrivance the milk is heated very quickly and equally and is kept warm
during the shortest possible time which is of great consequence for the quality both
of the milk and of the cream and also affects the butter and the cheese.
By thermometers immersed into the milk and into the waterbath the temperature
of both can be controlled, the temperature of the latter being accurately regulated by
opening or closing the steam cock to the coil K more or less.
The milk in the reservoir / being exhausted fresh milk well cooled and separated is
filled into it in a quantity equal to about one and a half times the capacity of the
vessel b. This milk being then run down through the tube f enters b at the bottom

page_text: and drives up the unskimmed milk out of the apparatus, leaving the separated milk
alone in the same after which the water is let off and the vessel emptied.
If several separators are at work simultaneously, the vessel a of feed heater can be
of sufficient size to contain several apparatus 6 of the above described construction.
By imparting to the waterbath a higher temperature, the milk can be heated to
90° C. and the apparatus may serve as a Pasteurizing apparatus. It is evident that
the apparatus can likewise be employed for heating a current of any other liquid.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
--
Apparatus for heating liquids consisting of a closed vessel immersed in a heated
water bath and having a supply pipe or tube passing down from the top to near the
bottom, through which the liquid to be heated enters the vessel, the ascending liquid
in which after becoming heated is made to flow off through an outlet at top,
substantially as herein described.
ABEL & IMRAY,
Agents for the Applicant.