Improvements in or relating to Filters and Hot Water Urns.
Year: 1892

page_text: Date of Application, 16th Mar., 1892
Complete Specification Left, 16th Dec., 1892-Accepted, 21st Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to Filters and Hot Water Urns.
I, WILLIAM EDWARD CADDELL, of 70 Mark Lane, in the City of London,
Merchant, do hereby declare the nature of this invention to be as follows:-
The present invention relates to the combination with a filter of an urn for
holding hot water or the like, so arranged that the urn may be automatically fed.
The filter may also be provided with a separate tap or outlet for supplying drinking
water. This invention is particularly applicable to the bars of public houses,
restaurants, tea and coffee rooms or the like.
In carrying out this invention I may use any kind of filter though I prefer to
use that known as the Berkefeld filter.
The water is preferably fed into the lower part of the filter from any convenient
source and passes through the filtering medium into the urn preferably through a
branch pipe. The urn may be heated by spirit or gas or by other means and is
preferably provided with a float valve which automatically regulates the supply of
water from the filter. When any of the contents of the urn are withdrawn the
float falls and valve regulating the supply from the filter will be opened and the
height of the water in the urn may thus be automatically regulated. As the water
in the urn rises the valve is automatically closed.
Drinking water can be supplied by a pipe and tap branching from the upper
part of the filter. Thus, the same filter can fulfil two functions viz. automatically
feed the hot water or other urn, and at the same time supply drinking water.
Dated this 15th day of March 1899
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Filters and Hot Water Urns.
I, WILLIAM EDWARD CADDELL of 70 Mark Lane in the City of London,
Merchant, 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 :-
The present invention relates to the combination with a filter of an urn for
holding hot water or the like, so arranged that the urn may be automatically fed.
The filter may also be provided with a separate tap or outlet for supplying drinking
water. This invention is particularly applicable to the bars of public houses,
restaurants, tea and coffee rooms or the like.
In carrying out this invention I may use any kind of filter though I prefer to use
that known as the Berkefeld filter.
The water is preferably fed into the lower part of the filter from any convenient
source and passes through the filtering medium into the urn preferably through a
branch pipe. The urn may be heated by spirit or gas or by other means and is
preferably provided with a float valve which automatically regulates the supply of
water from the filter. When any of the contents of the urn are withdrawn the
float falls and valve regulating the supply from the filter will be opened and the
---

page_text: height of the water in the urn may thus be automatically regulated. As the water
in the urn rises the valve is automatically closed.
Drinking water can be supplied by a pipe and tap branching from the upper part
of the filter. Thus, the same filter can fulfil two functions viz. automatically feed
the hot water or other urn, and at the same time supply drinking water.
The invention will be understood by reference to the accompanying drawing
in which the apparatus is shown partly in side elevation and partly in vertical
section.
A. is the hot water urn of ordinary construction provided with the usual draw-off
cock and lid. C is the base provided with any suitable number of feet for sup-
porting the urn; the base is preferably perforated and hollow to permit of a spirit
or gas lamp being placed therein. E is a metal rod or tube brazed or otherwise
fixed to the bottom of the urn and over this rod slides a tube F carrying at its
upper part one or more rings F'. The tube F is supported by an arm G of
lever G G¹ pivotted to the bracket H. The arm G' engages with the slot I' of the
valve rod I guided in the valve casing J; the other end of this rod is formed into
a conical valve I' as shown.
Rigidly secured to the tube F is a float L which rises and falls as water enters
or flows from the urn respectively. The filter may be of any ordinary construction
but I prefer to employ the type known as the Berkefeld filter which is provided
with an outer casing M preferably of metal, the upper portion of which may branch
out to form lugs or projections M'. The lower part of the casing is screwed on
to a base M³ through which passes a pipe N communicating with the water supply.
Any suitable filtering medium may be employed but I prefer to use a block of
Kieselguhr which is suspended in the filter by a short pipe P passing through an
inverted cap Q and maintained in position by the nut P¹. The Kieselguhr may be
cast and otherwise secured to the pipe P. R is the cover or lid of the filter and
may be provided with projecting lugs R' corresponding with the lugs M' of the
casing; the lugs M' are provided with screw-threaded holes to receive the thumb-
screws S which pass through plain holes in the lugs R'. Rings T of indiarubber or
other flexible material may be fitted on either side of the flange of the inverted
cap Q and serve to form a water-tight joint when the cover R is screwed down.
The water passes from the lid R upwards through the pipe U and then either
through the pipe V to the urn or if cold water for drinking purposes is required
then through the pipe W provided with any suitable cock ✗.
The action is as follows:-When water is drawn from the tap of the hot water
urn the float L falls pulling down the arm G of the lever which opens the valve
and allows the filtered water to enter the urn through the nozzle J'; the float will
then rise and the valve will be closed. The urn can thus be automatically fed with
filtered water. When the filtered water is required for drinking purposes all
that is necessary is to turn on the tap X when a supply of water will down
the pipe W.
pass
It will be understood that the urn and filter are one apparatus and although they
are shewn some little distance apart in the drawing, they may just as conveniently
be placed close together, or the filter may be placed inside the urn, so long as
suitable means such as packing is provided for preventing the water passing
through the filter becoming heated.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination with a hot water urn of a filter forming substantially part
of the same apparatus, the whole water supply of the urn passing through the filter
substantially as described.
2. The combination with a hot water urn of a filter such as MO forming
substantially part of the same apparatus, and having besides the supply for the

page_text: urn a branch such as W for the purpose of drawing water directly from the filter
without passing through the urn substantially as described and illustrated in the
accompanying drawing.
D-11 10111000
W. E. CADDELL.
W. P. Thompson & Boult,
Agents for the Applicant.