Improved Cooling Apparatus for Beer and other Liquids.
Year: 1897

page_text: Date of Application, 8th July, 1897-Accepted, 14th Aug., 1897
COMPLETE SPECIFICATION.
Improved Cooling Apparatus for Beer and other Liquids.
I, PAUL GERLACH of 48, Bahnhofstrasse, Rummelsburg in Pomerania, German
Empire, Cooper, 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:—
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My invention relates to a cooling apparatus of the pattern known as a surface
cooler" in which the fluid to be cooled is conducted along the sides of a vessel
which is filled internally with ice or a freezing mixture.
My new cooler differs from apparatus of this kind hitherto in use in that the
fluid to be cooled does not come in contact with the atmosphere during the cooling,
and consequently my apparatus is peculiarly adapted for fermented fluids con-
taining carbonic acid such as beer; it is also however well suited for cooling milk,
drinking water, or for chemical purposes and the like. The apparatus can also,
especially for the purpose of cooling beer be applied equally profitably in small
dimensions to delivery apparatuses, in which then the costly, cumbersome and
slowly operative packing of the case with ice is obviated and the small quantity
of ice absolutely necessary is only melted by the heat of the beer which is to be
cooled; furthermore the apparatus is capable of application in any size required
in breweries and the like for the cooling of whole brewings in the place of the
present surface cooling trickling apparatus.
The accompanying drawing illustrates in section a method of constructing the
apparatus. A is a vessel preferably of copper tinned on the outside, upon the
outer surface of which there is attached a spiral rib a of sheet iron. This vessel A
is placed in an outer vessel B also preferably of metal; this outer vessel is of
such a width that the ribs a are in contact with its inner surface. Both the
vessels A and B have flanges C D bent outwards between which a water tight
washer is placed. The vessel B has underneath a bolt a' which passes through
the bottom of A and is provided at its end with a screw upon which the screw
nut is fixed. This nut presses when screwed up upon the disc g and the same
is rendered water tight through the washer g', whilst at the same time the upper
flanges are tightly pressed upon one another. The vessel B has below an inlet
piece B', and above an outlet piece B to which the tube connections are attached
by means of the coupling devices E E or the like. The inner vessel A is filled
with ice in small pieces, a wooden cover is placed upon the same, the fluid to be
cooled is admitted through B' and the let off tap of the oulet is left open until
the fluid appears through it, whereupon the same is closed; after a certain time
the fluid in the vessel B has completely parted with its heat to the ice, and when
for instance the cooler is utilised for beer delivery apparatus each quantity drawn
off is delivered well cooled. This efficient cooling results from the spiral track
which the fluid is obliged to take because of the ribs and in very short time so
that even when the taps are constantly opened a very considerable reduction of
temperature is obtained.
in the constructional form illustrated in the drawing the cooling apparatus is
shown arranged in a wooden box so that further ice cooling can be applied to the

page_text: outside. In the case of greater cooling vessels, the air tight closing between
the flanges CD is better effected directly by means of nuts and bolts. If a single
cooling apparatus should not suffice to give the necessary reduction of temperature
other apparatuses can be arranged in series and the first might in this case instead
of being filled with ice be filled with cold water, because if the fluid to be cooled
possesses a high initial temperature there can be effected a great reduction therein
by this means. Moreover the outer vessel B may be placed in cold water or ice,
or the like as indicated in the drawing.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:-
The improved cooling apparatus for fluid consisting of a vessel provided exter-
nally with spiral divisions which is placed in an outer vessel of corresponding
shape provided with inlet and outlet apertures, and which vessels are rendered
watertight with regard to one another by means of flanges substantially as
described.
Datu CILIS Our day y
W .P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.