Improvements in or Relating to Liquid Delivering Apparatus of the Syphon-bottle Type.
Year: 1897

page_text: Date of Application, 13th Oct., 1897-Accepted, 5th Feb.,
1898
COMPLETE SPECIFICATION.
Improvements in or Relating to Liquid Delivering Apparatus of the
Syphon-bottle Type.
We, AUGUST SCHWARZ, Merchant, and ADOLF GEORG HOFFMANN, ENGINEER,
both of Möckernstrasse 118, Berlin, in the Empire of Germany, 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:-
This invention relates to so called siphon apparatus, as used for delivering
beverages, and especially to arrangements for drawing off in a manner as free as
possible from froth, to the construction of the inner and exterior vessel and their
tightening, and the arrangement of all fittings in such a manner that they are
protected against injury in transport or use.
The annexed drawings on two sheets show a cask like siphon provided with
the improvements in question. Fig. 1 being a sectional elevation Fig. 2
sectional plan & Fig. 3 a detail view.
The main parts of the siphon are the exterior cask like vessel a for receiving
the pressure gas, the inner vessel 6 for the liquid and the protecting ring c for
receiving all fittings.
In order to avoid as much as possible losses of pressure gas, it is necessary to
make the exterior metal vessel a in such a manner that it has as few closing
seams as possible. This is effected by making the body of this receiver completely
in one piece.
As such vessels can only be made open at one end, it is necessary to provide at
this end arrangements for the insertion and support of the inner inserted vessel
and to arrange the closure cover and the other fittings. For this purpose the rim
of the vessel a is bent inwards at a¹ and this part serves as resting place for a
special protecting ring c that is to say for its inwardly bent foot c¹; after fitting
on the protecting ring c the wall of the vessel a is again bent outwards, so that
the part of the protecting ring lies immovably in the so formed groove. On
this second outwardly bent part there is laid a disk z provided with a central
opening for the inserted vessel b and carrying this vessel and this disk z is fitted
by bending the upper border of the vessel a again inwards. The inwardly and
outwardly bent parts of the vessel a with the inserted protecting ring c and
disk z are then pressed firmly together, so that these parts are connected with the
receiver a in the most solid manner.
2
The protecting ring c serves for guarding the fittings and has such height that
all such fittings (cocks, valves, escape supporting bow, etc.) find room within the
same and can be arranged in such a manner, that no part projects over the upper
edge, and thus injuries are avoided in transport. The protecting ring serves
simultaneously as cooling chamber, as the space in the chamber 7 not occupied by
the fittings can be filled with ice.
The inserted vessel b is closed by means of a cover d, which can be pressed on
by means of a pressure screw e an extremely solid tightening both of the inner
and simultaneously of the exterior vessel being obtained by using a double tighten-
ing ring f surrounding the flange 61 of the inserted vessel at the under exterior

page_text: and upper faces, so that there is tightening material both between the protecting
ring and the flange and also between the latter and the cover, so that, when the
cover is pressed down by means of the screw' e both the receiver and also the in-
serted vessel b are tightened severally and in respect of one another. The two
chambers a and b are then closed from one another and communicate only by
means of capilliary openings 62, by which the pressure is balanced respectively,
pressure gas passing into the receiver b and driving the liquid out through the
tube t.
Instead of using a closed double ring, one might also use two single rings, one
under the flange and one over the same.
When the inner vessel is intended for receiving liquids the use of a vessel made
of enamelled sheet metal is preferred since oxydation of the walls of the vessel
does not take place and the fragility of glass or earthenware vessels is avoided.
Closure with great pressure can be employed and also the receiver is unaffected
by changes of pressure therein as well as against shocks in transport and when the
vessel, is taken out. Such interiorly enamelled receiver, can also have handles
serving for removal of the vessel and consisting of the same material, so that
the liquid comes every where in contact only with parts coated with enamel.
This is obtained in the simplest manner, by providing the vessel with an inwardly
projecting annular swelling 63, under which the hand or a suitable tool bolt can
be inserted for the purpose of taking the vessel dut. This swelling can be pro-
vided at a place, where it serves simultaneously as a' mark for a certain filling
quantity.
The screw e for pressing down the cover d engages in a threaded socket in a
loose bow g consisting of an U shaped iron; this bow lies with its open
side up-
wards, the screw head being in the free space so that it does not project over the
upper edge and is thus protected against injury. This bow 9 serves simultaneously
as a carrying handle for the whole apparatus. For this purpose there are pro-
vided on two opposite lying sides of the inner wall of the protecting ring c swell-
ings or blocks, which have such size, that they can be embraced by the two
cheeks of the bow. On turning the bow round the screw e into such a position,
that its ends stand under the blocks and on screwing up the screw the bow is
brought up firmly against the blocks, and the cover d is pressed strongly on the
inserted vessel b, 'the bow so fixed can be used as a carrying handle by placing
the hand under .it.
A further improvement relates to a simplified arrangement' for permitting out-
flow of the liquid for instance beer without excessively strong force or formation
of froth. In order to regulate the gas pressure acting on the liquid and driving
it through the tube t, a special reducing valve was hitherto necessary, in order to
cause the liquid to escape in a manner as free from froth as possible by conveniently
reducing the pressure, whilst this new apparatus uses no pressure regulation of
the gas, but acts by throttling the liquid before its escape, whereby it remains
always under the same full pressure. In order to obtain this effect, only one
delivery and regulating cock is used, which has the following construction. The
cock casing i is screwed in the cover d and a conical valve body k is adjustably
arranged in this casing by means of a screw spindle k¹. The valve casing has
two chambers m and n of different diameters, which are separated from one another
by the valve cone, and of which the chamber n must have a larger diameter,
than the tube t entering into it. The liquid when entering into the chamber n
undergoes an expansion with simultaneous diminution of velocity, and a second
expansion when passing from the chamber n to the chamber m. According to
the degree of raising of the valve the liquid will flow in a more or less strong
layer from n to m, whereby it undergoes a certain throttling, but under simul-
taneous repeated expansion and diminishes here again considerably 'its velocity of
movement and can now flow off free of froth. Instead of the double reduction
of the velocity of the liquid there might of course also be a single or a multiple
reduction.
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page_text: The
From the upper space of the cock the liquid flows off through a tube o.
latter reaches only to or into the wall of the vessel and is there formed conically
and provided with a stop pin 2. On this tube o the curved nozzle w is attached
so that it can be easily taken off. For this purpose the tubular piece w has at its
end an enlargement s which is bored conically corresponding to the cone on the
tube piece o and has an angular slot u, into which the pin p can reach. It can
be seen, that after having slid on the detachable tubular piece w one can connect
the latter with the fixed tube piece by turning it after the manner of a bayonet
closure which is done before using the siphon. For purposes of transport the
tube piece w hanging conveniently on a small chain is taken off and placed in
the upper empty space, so that no part of the escape tube projects beyond the cask
and consequently it cannot be injured. The free opening of the fixed tube part o
can then be closed by a label, as indicated at v in dotted lines.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed we declare that what
we claim is:-
In siphons for delivering liquids.
1. A metal cask open at the top with upper supporting faces and connecting
places produced by bending the wall inwards and outwards for an upper cover
disk and a special protecting ring.
2. A protecting ring placed on the exterior receiver and connected with the
same for walling in all fittings in such a manner, that in order to avoid injuries
no projecting parts are visible, the space not required by the fittings being suitable
for use as an ice chamber.
3. The tightening of the inserted receiver against the exterior vessel and of
both vessels simultaneously against the exterior air by means of a double tighten-
ing ring on the one side between the flange of the inserted vessel and the pro-
tecting ring and on the other side between the flange and the cover and besides
surrounding the flange from outwards, the flanges of which tightening ring are
simultaneously compressed when fastening the cover.
4. An inserted vessel consisting of enamelled sheet metal with an annular inward
swelling for allowing the vessel to be taken out in an easier manner.
5. A bow made of U shaped iron in the protecting ring, which bow receives the
upper part of the pressure screw for the cover and is guided upwards against
swellings or blocks on the vessel wall when screwing up this screw and serves also
as carrying handle.
6. A delivery and regulating cock having at the mouth of the rising pipe a
chamber of larger diameter than the pipe and at the delivery end of this chamber
an adjustable closure valve and over the latter a larger chamber for the purpose
of avoiding the formation of froth by means of multiple diminution of the velocity
of movement of the entering liquid, as well as by a throttling of the same.
7. A divided out flow tube of which the fixed part is attachable by means of
an appropriate closure with a detachable exterior escape nozzle.
101
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1007
HERBERT HADDAN & Co.,
Agents to Applicants,
18, Buckingham Street, Strand, London.