IMPROVEMENTS IN APPARATUS FOR MAKING INFUSIONS OR EXTRACTS FROM SUBSTANCES."
Year: 1880

page_text: LETTERS PATENT to Robert Ulrich Etzensberger, of St. Pancras, in the
County of Middlesex, for an Invention of "IMPROVEMENTS IN APPARATUS
FOR MAKING INFUSIONS OR EXTRACTS FROM SUBSTANCES."
T
PROVISIONAL SPECIFICATION left by the said Robert Ulrich Etzensberger
at the Office of the Commissioners of Patents on the 17th July 1880.
ROBERT ULRICH ETZENSBERGER; of St. Pancras, in the County of Middlesex.
"IMPROVEMENTS IN APPARATUS FOR MAKING INFUSIONS OR EXTRACTS FROM
SUBSTANCES."
This Invention is an improvement upon another Invention of mine for, which
Letters Patent have been' granted to me on the 21st of January 1878, No. 264.**
My present Invention particularly refers to the construction and arrangement of
apparatus on a large scale for making infusions or extracts of tea and coffee in large
quantities for use in public places of amusement, hospitals; barracks,' asylums,
factories, and otherwise, as may be required.*
For this purpose I provide a circular or square boiler of any convenient size, say,
one capable of holding a hundred gallons or more of water, which is filled or nearly
so with water to be heated by means of a steam coil placed inside at or near the
bottom of the boiler, as described in the Specification of the Patent before
mentioned. The boiler is provided with pressure and water gauges, filling up, and
air cock and draw off cocks. Below and in front of or around the boiler I place
the vessels or infusers for the reception of the infusions required, say, two or more,
for the manufacture of coffee and tea or other infusions. The tea leaves, the ground
coffee, or other substances are placed in boxes perforated at the upper. and lower
part, and constructed as described hereafter. These boxes when filled are fitted to
the draw off cocks of the boiler, and so placed that they terminate in the centre of
the vessels for the reception of the infusion. The nozzles of these cocks enter the
boxes containing the tea and coffee, forming with them a water tight joint, so that
by turning the tap of either cock boiling water is forced into the boxes, and
passing upwards through the said boxes tea or coffee, as the case may be, overflows
from the top of the boxes and falls into the vessel or receiver below as an infusion
of tea or coffee as the case may be, or any other infusion according to the material

page_text: placed in the perforated boxes; gauge glasses are provided to these receivers which
indicate the quantity of liquid made, and cocks at the lower end for drawing off
the contents, that is, the infusions.
The cocks leading from the boiler have their nozzles made to fit into corre-
sponding sockets formed in the tubes leading to the interior of the boxes for
holding the substances from which the infusions are to be made, and the
construction of these boxes will be presently described. The nozzles of the cocks
are secured in the sockets by flanges passing through apertures, and turning said
flanges when they are inserted or by any convenient means of fastening, so that a
watertight joint may be obtained. The tube through centre of holder leads
through the lower perforation to a false bottom of the holder; the inner surface of
this space is provided in the centre with a conical boss or elevation against which
the water passing down the tube impinges, and is thence projected up and side-
wards against and through the perforations in the box above containing the tea,
coffee, or other substance from which the infusions or extracts are to be made.
These boxes are provided with hinged perforated covers or doors, preferably two,
one on each side of the water filling tube, and at the sides I secure these covers_by
strong buttons.
Convenient handles are placed at the top with wood pieces
attached to facilitate the removal and introduction of the boxes from the top of the
infusers, which latter are covered with lids, put on preferably in two parts, for the
sake of convenience in passing same round the water, taps and over the boxes
before described.
At the side of the boiler and preferably near the upper level of the infusers I
place a vessel for heating milk; this vessel is surrounded by another vessel forming
a steam jacket, which receives the exhaust steam from the coil in the boiler. This
exhaust steam fills the jacket with condensed water, heats the milk in the inner
vessel to the required temperature, and an overflow pipe leading from the jacket
into a tray.conveys the condensed water used for heating the milk to the said tray
in which the receivers are placed, and which is also provided with an overflow pipe,
so that there may be kept up if desired a continuous flow of hot water for heating
the milk, and for preserving the heat of the infusions in the vessels without any
expense or trouble.
...
い
The milk is drawn from the top of the inner vessel by a syphon pipe with tap
below. The inner vessel or milk holder is removable for cleaning purposes.
Handles are provided to all vessels for removing same from place to place, and
for putting them conveniently into position..
:
Apparatus constructed in the manner before described may be supplied with
water obtained from any suitable or convenient boiler or vessel, which may supply
any desired number. of vessels, suitable cocks being provided to direct the boiling
.water to the particular vessel in which the infusion is to be made.

page_text: SPECIFICATION in pursuance, of the conditions of the Letters Patent filed by the
said Robert Ulrich Etzensberger in the Great Seal Patent Office on the 17th
January, 1881..
+
ROBERT ULRICH ETZENSBERGER, of St. Pancras, in the County of Middlesex.
* IMPROVEMENTS IN APPARATUS FOR MAKING INFUSIONS OR EXTRACTS FROM
SUBSTANCES."
This Invention is an improvement upon another Invention of mine for which
Letters Patent have been granted to me on the 21st of January 1878, No. 264.
My present Invention particularly refers to the construction and arrangement
of apparatus on a large scale, for making infusions or extracts of tea and coffee
in large quantities for use in public places of amusement, hospitals, barracks;
asylums, factories, and otherwise, as may be required.
For this purpose I provide a circular, or square boiler of any convenient size,
say, one capable of holding a hundred gallons or more of water, which is filled or
nearly so with water to be heated by means of a steam coil placed inside at or
near the bottom of the boiler, as described in the Specifications of the Patent
before mentioned: The boiler is provided with pressure and water gauges, filling
up and air cock, and draw off cocks. Below and in front of or around the boiler
I place the vessels or infusers for the receptions of the infusions required, say, two
or more, for the manufacture of coffee and tea or other infusions. The tea leaves,
the ground coffee, or other substances are placed in boxes perforated at the upper
and lower part, and constructed as described hereafter. These boxes when fitted
to the draw off cocks of the boiler are so placed that they terminate in the
centre of the vessels for the reception of the infusion; the nozzles of these cocks
enter the boxes containing the tea and coffee, forming with them a watertight
joint, so that by turning the tap of either cock boiling water is forced into the
boxes, and passing upwards through the said box tea, or coffee, as the case may
be, overflows from the top of the boxes and falls into the vessel or receiver below
as an infusion of tea or coffee, as the case may be, or any other, infusion
according to the material placed in the perforated boxes; gauge glasses are
provided to these receivers which indicate the quantity of liquid made; and cocks
at the lower end for drawing off the contents, that is, the infusions.
The cocks leading from the boiler have their nozzles made to fit into corre-
sponding sockets formed in the tubes leading to the interior of boxes for holding
the substances from which the infusions are to be made, and the construction of
these boxes will be presently described. The nozzles of the cocks are secured in the
sockets by flanges passing through apertures, and turning said flanges when they
are inserted, or by any convenient means of fastening, so that a water tight joint
may be obtained. The tube through centre of holder leads through the lower
perforation to a false bottom of the holder; the inner surface of this space is
provided in the centre with a conical boss or elevation against which the water
passing down the tube impinges, and is thence projected up and sidewards against
and through the perforations in the box above containing the tea, coffee, or other
substance from which the infusions or extracts are to be made. These boxes are
provided with hinged perforated covers or. doors, preferably two, one on each side
of the water filling tube, and at the sides I secure these covers by strong buttons.
Convenient handles are placed at the top. with wood pieces attached to facilitate
the removal and.introduction of the boxes from the top of the infusers, which latter
are covered with lids, put on preferably in two parts, for the sake of convenience in
passing same round the water taps and over the boxes before described.
At the sides of the boiler and preferably near the upper level of the infusers
I place a vessel for heating milk; this. vessel is surrounded by another vessel

page_text: forming a steam jacket, which receives the exhaust steam from the coil, in the
boiler;
this exhaust steam fills the jacket with condensed water, heats the milk in
the inner vessel to the required temperature, and an overflow pipe leading from the
jacket into a tray conveys the condensed water used for heating the milk to the
said tray in which the receivers are placed, and which is also provided with an
overflow pipe, so that there may be kept up if desired a continuous flow of hot
water for heating.the milk, and for preserving the heat of the infusions in the
vessels without any expense or trouble.
The milk is drawn from the top of the inner vessel by a syphon pipe with tap
below. The inner vessel or milk holder is removable for cleaning purposes.
Handles are provided to all vessels for removing same from place to place, and
for putting them conveniently into position.
Apparatus constructed in the manner before described may be supplied with
water obtained from any suitable or convenient boiler or vessel, which may supply
-any-desired number of vessels, suitable cocks being provided to direct the boiling
water to the particular vessels in which the infusion is to be made.
Figure 1 is a front elevation; Figure 2, a side elevation, and Figure 3, a plan of
the combined apparatus; Figure 4 is a vertical section through one of the infusing
vessels with infusing box; Figure 5 is a vertical section through the milk warmer;
Figure 6 is an outside elevation and part section of an infusing box with cock
attached; Figure 7 is a vertical cross section through an infusing box; and
Figure 8 is a plan of the socket connecting the infusing box with the cock.
A is the boiler, which may be made large enough to hold 100 gallons or more of
water, which may be heated by steam entering by the cock a into a steam coil y
placed in the lower part of the boiler or by free steam. It is fitted with safety
valve, pressure gauge, and gauge glass, as shown; a¹ is a double acting cock. for
charging the boiler with water, and for letting out the air; B is an infusing vessel,
say, for coffee, and C, similarly for tea; both are fitted with gauge glasses, as shown ;
D is a milk heater.
F, F, are cocks for drawing the heated water off from the boiler A, and conveying
it into the boxes for holding the tea or coffee to be infused, and which are placed
centrally inside the vessels B and C; the mode of connection of these boxes with
the draw off cocks F will be understood from Figures 4, 6, 7, and 8. The cock F,
Figure 6, terminates below in cone nozzle f, ground so as to fit water tight in a
corresponding socket part e of a pipe E, which is fixed to the top of the infusion'
box G. The nozzle f of the cock F is secured to the socket e by part, flanges or
lugs f, which are passed through the apertures e¹, Figures 7 and 8, formed in an
inner projecting flange e² of the chamber e³ on the top of the socket e; the box G
is then taken hold of and turned partly round, so that the lugs f¹ come under
the flange e, which are formed slanting, as shown in Figures 6 and 7, for the
purpose of giving a gradually increased pressure tending to press the nozzle fand
socket e tight together. Instead of such a bayonet joint a screw and nut joint with
part of the thread cut away may be used, or any other quickly and conveniently
made water tight joint.
The tube E is continued down centrally through the infusion box G, which is
formed with a perforated diaphragm g; the space between the latter and the
bottom g is contracted in the middle, as shewn, by a conical boss g² or elevation
of the bottom g¹. By this means I cause the hot water to pass evenly up through
all parts of the box; 95, 95, are hinged perforated covers, in this case two in
number, and secured to the sides of the box by strong buttons g³. There is a
handle g on each side for conveniently removing the boxes, and for introducing
them into the infusing vessel B and C. The latter have lids B and C, by
preference in two parts, as shown, for conveniently fixing them at each side of the
cock F and over the boxes G.
The tea-leaves, ground coffee, or other substance to be infused having been put
in the box G, and the lids g³ having been closed and secured, the box G is
connected to the cock F, and by part of a turn firmly and water tight secured

page_text: thereto. The lids B₁ or Care then put on. The cock F may then be turned,
admitting boiling water to the pipe E, and by the perforations o therein and in the
diaphragm g it will rise up through the material in the box, and passing out
through the perforated covers g* fall into the receiver B or C as an infusion ready
to be drawn off into pails or other receptacles by means of the cocks b¹ or c¹.
D is a vessel for heating milk; it contains the milk vessel D', and forms a steam
jacket all round and below the vessel D₁, as shown at Figure 5; this jacket receives
the exhaust steam from the steam coil in the boiler A by the cock ¹; the steam
condensing in the jacket and heating the milk in the vessel D' as required overflows
as water by the pipe h¹ to the tray J, in which the infusers B and C are placed,
thus keeping them warm; the trays J may have an overflow pipe p, and a
continuous flow of condensed water may thus be established, the milk being heated
and the tea and coffee kept hot thereby; h² is a syphon pipe with cock for
drawing off the hot milk as required. The interior or milk vessel D¹ is removable
for cleaning.
And having thus described and ascertained the nature of this Invention,
I declare that I do not lay general claim to boxes or holders for making infusions
in which the boiling hot water is passed up through the perforated bottom of
the holder containing the material to be infused, but I claim,―
First. The general combination of a boiler or vessel for boiling hot water, receivers
for infusing tea, coffee, or other materials, and a milk heating appliance, all so fitted
and constructed and relatively arranged as to facilitate the making infusions on
a large scale, and to keep them hot for use, substantially as described and shown.
Second. Constructing the boxes or holders for the material to be infused with a
lower space G in combination with the perforated false bottom g and descending
pipe E, substantially as set forth.
In witness whereof, I, the said Robert Ulrich Etzensberger, have hereunto.
set my hand and seal, this Thirteenthth day of January, in the year of our
Lord One thousand eight hundred and eighty one.
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