Improved Apparatus for Sterilizing Water.
Year: 1892

page_text: Date of Application, 14th Nov., 1892-Accepted, 21st Jan., 1893
COMPLETE SPECIFICATION.
Improved Apparatus for Sterilizing Water.
I, DAVID GROVE, of the City of Berlin, in the Empire of Germany,
24, Friedrichstrasse, Manufacturer, do hereby declare the nature of this inven-
tion and the manner in which the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The present invention relates to an improved apparatus for sterilizing water
in which water is made to boil, in order to become sterilized in the least possible
space of time by a heating device and then quickly cooled again by cold water in
such way, that it can be drawn off from the apparatus as drinkable water.
This object is attained by the cold water inlet pipe being encircled for the greater
part of its length by a second pipe, which, after the water has passed into the
heating device and has therein been heated, leads the water into a storage
reservoir and conducts same back again the same way but in the opposite direction
By this arrange-
in order to bring in contact with the pipe leading the cold water.
ment, the heated and sterilized water communicates its heat to the water passing
upwards into the heating device and at the same time is thus gradually cooled on
its way, being ultimately quite cold and drinkable when drawn off.
This sterilizing is very suitable for household use, since it is so arranged, that,
in addition to sterilized cold water, it can also deliver boiling water in any
quantities required.
There is an arrangement whereby a cock in the water inlet pipe can only be
opened after the gas tap has been opened, this being effected by a disc mounted on
the spindle of the gas valve or tap & which disc turns with said spindle uncovering
at the end of its movement, by a suitable opening or recess the water valve which
was hitherto covered by such disc.
I will now describe my invention with reference to the accompanying drawings
in which
Fig. 1 is a sectional front view of the water sterilizing apparatus,
Fig. 2 is a vertical section,
Fig. 3 is a plan view of the water tubes bent in spiral form and pushed into
each other &
Fig. 4 is a sectional view of the connection of the end of an outer with an inner
pipe.
The sterilizing apparatus is shown as having the form of a kitchen or box
chair a with a high back a', but the invention is of course not restricted to this
form alone.
Behind the back a¹ and at the upper end of the same are fixed the gas pipe b
and the water pipe c (Fig. 1). The gas pipe leads direct to the burner d' of the
heating device, whilst the water pipe c extends downwards to the bottom of the
space inside the box-chair a and from here goes upwards spirally, being ultimately
connected with the body of the heating device & which in its turn, is connected
with a reservoir f by a pipe c'.
A thermometer is arranged on the reservoir f
When sterilized and cooled-that is, drinkable water is required, the gas cock A,
on the spindle, on which a disc i turning with said spindle & provided with an
opening is mounted, must be opened, when the gas cock his open, the opening i
(as shown in Fig. 1 and 2) stands directly over the square of the water cock h so
that in this position, the latter can also be opened by means of a special key. The
water entering by the inlet pipe c is conducted through said pipe e after having
passed through a coil in the inside space a² of the chair-box a, to the heating

page_text: body of the heating device d and there quickly heated to boiling point by the
flame from the burner d'.
From here the water passes into the reservoir f where it is collected, it then flows
on through the pipe into the pipe m entering afterwards through the joint o into
the pipe n which encircles the inlet pipe c. The hot water is thus returned in the
annular space between the tubes n and c in the opposite direction to the fresh cold
water as shown by the arrows in Fig. 1 and can be drawn off by the cock p, quite
cold after having passed a second joint o'. By this arrangement the hot sterilized
water is quickly and thoroughly cooled and at the same time the cold water
becomes pre-heated. In order to better cool the warm water to a drinkable
temperature, that is, to keep the same as long as possible in contact with the cold
water, the two pipes c, n the one of which is inserted into the other & the whole
bent as mentioned in a coil in the space a² of the chair a, can, when required be
still more rapidly cooled by placing ice in such space.
The water sterilizing apparatus is further so arranged, that boiling water can be
· drawn off direct from same. To this end the pipe besides being in connection
with the pipe n, is in direct connection with a cock or tap g by which warm water
can be drawn out of the reservoir without its having to pass through the pipe n.
9
By means of the thermometer g on the storage reservoir one is always able to
ascertain & control the degree of temperature of warm water entering from the
heating device d & to see that it is of the right sterilizing temperature.
The reservoir has the further purpose of equalising unequal pressure in the
pipes.
By arranging the discover the gas & water cocks as described the water cock
can only be opened after the gas cock has been opened &, by this arrangement, the
water still remaining in the heating device from the last employment of the
sterilizing apparatus can be boiled again, since the short time of turning the lever
is sufficient for this purpose..
When the apparatus is put out of operation the water-cock must first be closed.
Having now particularly described and ascertained the nature of this inven-
tion and the manner in which the is to be performed, I declare that what I
claim is :
1) An improved apparatus for sterilizing water, in which cold water is taken
in by a coiled pipe (c) and heated by means of a heating device as (d) led to
a reservoir (f) and from here through a pipe (c) in an opposite direction to the
cold water passing the pipe c, substantially, as; and for the purpose described
and shown in the accompanying drawings.
2) In an improved apparatus for sterilizing water by heating the same the
arrangement of a disc (1) turning with the gas cock () when the latter is being
opened and only uncovering the water cock when said gas cock is fully opened,
substantially as described and shown in the drawings.
3) In an improved apparatus for sterilizing water by heating the same the
arrangement of a storage reservoir in connection with the heating device for the
purpose of equalizing the pressure in the piping such reservoir being fitted with a
thermometer by which the temperature of the water before leaving the apparatus
can be ascertained, substantially as described and shown in the drawings.
4) In an improved apparatus for sterilizing water by heating the same as
described the combination of a pipe (m) leading to a special outlet (g) with
the hot water tube (1) in order to allow of hot water being drawn, substantially as
described and shown in the drawings.
Dated 14th November 1892.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.