AN IMPROVEMENT IN FILTERS FOR ATTACHMENT TO SERVICE AND SUPPLY WATER PIPES
Year: 1871

page_text: ·LETTERS PATENT to John Llewellin, the younger, of the City of
Bristol, Brass Founder, Coppersmith, and Engineer, for the Inven-
tion of "AN IMPROVEMENT IN FILTERS FOR ATTACHMENT TO SERVICE AND
SUPPLY WATER PIPES."
Sealed the 29th September 1871, and dated the 5th April 1871.-
PROVISIONAL SPECIFICATION left by the said John Llewellin at the
Office of the Commissioners of Patents, with his Petition, on the
5th April 1871.
-
I, JOHN LLEWELLIN, the younger, of the City of Bristol, Brass
Founder, Coppersmith, and Engineer, do hereby declare the nature of
the said Invention for "AN IMPROVEMENT IN FILTERS FOR ATTACHMENT TO
SERVICE AND SUPPLY WATER PIPES," to be as follows:-
This Invention relates to an improved construction of filter suitable
for direct attachment to service and supply water pipes, the filter being
made in parts to enable the filtering medium to be got at easily for
cleansing purposes.

page_text: The filter is composed of two cylindrical or other shaped cases, the
outer one has in its upper part or water inlet a screw valve or plug
for regulating the admission of water and a perforated cone for
scattering the water equally over the filtering medium. The lower end
is threaded or flanged so that the inner cylinder can be screwed therein;
this cylinder contains the filtering medium (preferably anthricate or
other coal). The filtering medium lies upon a perforated truncated cone
which forms a second or false bottom, and is covered with a horschair
or other gauzo to prevent the entrance of coarse impurities. The base
plate has two tubes fitted in it, and these rise nearly to the top of tho
inner cylinder, one of them is closed at one end, the other being open to
the draw-off tap or pipe leading thereto. The closed one is perforated to
permit of the liquid getting into the open one after it has passed through
the medium and the perforated cone. The outer cylinder may have
a strap or bracket, so that it can be fixed to a wall if necessary.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Llewellin in the Great Seal Patent Office
on the 5th October 1871..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
LLEWELLIN, the younger, of the City of Bristol, Brass Founder, Copper-
smith, and Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of April, in the year of our
Lord One thousand eight hundred and seventy-one, in the thirty-fourth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said John Lllewellin, Her special licence that I,
the said John Llewellin, my exccutors, administrators, and assigns, or
such others as I, the said John Llewellin, my executors, administrators,
and assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for “AN IMPROVEMENt in Filters for ÅTTACHMENT
TO SERVICE AND SUPPLY WATER PIPES," upon the condition (amongst others)
that I, the said John Llewellin, my executors or administrators, by an

page_text: instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invçn-
tion, and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Llewellin, do hereby declaro
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawings here-
unto annexed, that is to say:—
This Invention relates to an improved construction of filter suitable
for direct attachment to service. and supply water pipes, the filter being
made in parts to enable the filtering medium to be got at easily for
cleansing purposes.
The filter is composed of two cylindrical or other shaped cases a, b,
Figures 1, 2, 3, and 4, the outer one a, has in its upper part or water
inlet a screw valve or plug c, for regulating the admission of water,
and a perforated cone d for scattering the water equally over the filtering
medium. The lower end of a is threaded or flanged so that the inner
cylinder 6 can be screwed therein; this cylinder 6 contains the filtering
medium (preferably anthracite or other coal). The filtering medium lies
upon a perforated truncated cono e which forms a second or false bottom,
and is covered with a horsehair or other gauze screen ƒ to prevent
the entrance of coarse impurities. The base plate 9 has two tubes h, i,
fitted in it, and these rise nearly to the top of the inner cylinder b, one
of them, is closed at one end, the other i being open to the draw-
off tap or pipe leading thereto. The closed one is perforated to
permit of the liquid getting into the open one i after it has passed
through the medium and the perforated cone e.
Figure 5 is a modified form of the screw valve or plug c, and cone d,
which can be employed in lieu of the valve and conc shown in Figure 2.
The outer cylinder a may have a strap or bracket k so that it can be fixed
to a wall if necessary, or it may be suspended by a flexible tube from
an overhead supply or supported by a standard on a counter.
And having now described the nature of my said Invention and in
what manner the same is to be performed, I declare that I claim, "the

page_text: improvement in filters herein-before explained when the details thereof
are combined in the manner and for the purposes set forth and shewn.
In witness whereof, I, the said John Llewellin, the younger,
have hereunto set my hand and seal, this Fourth day of October,
One thousand eight hundred and seventy-one.
"TOTTA. TT TIDY T T
TD