AN IMPROVED WATER FILTER
Year: 1873

page_text: LETTERS PATENT to William Robert Maguire, of the Firm of Maguire
& Son, of Dawson Street, in the City of Dublin, Ireland, for tho
Invention of "AN IMPROVED WATER FILTER."
PROVISIONAL SPECIFICATION left by the said William Robert Maguire
at the Office of the Commissioners of Patents, with his Petition,
on the 10th May 1873.
I, WILLIAM ROBERT MAGUIRE, of the Firm of Maguire & Son, of
Dawson Street, in the City of Dublin, Ireland, do hereby declare the
nature of the said Invention for "AN IMPROVED WATER FILTER," to bo as
follows, that is to say :-
This Invention consists in the construction of an improved water filter,
in which the filtering material can be renewed or changed in a very

page_text: short time, allowing also the interior of the filter to be easily and
thoroughly cleansed when required.
The outer case of the improved filter is made as usual of stoneware or
other suitable material. In this outer case I place an inner case, or
filter pot, which is removeable to allow of being taken out when it is
required to clean the interior of the filter containing the water, or to
renew or change the animal charcoal or other filtering material employed.
The said filtering medium is placed in the lower part of the filter pot,
and is kept in its place by means of a perforated diaphragm having a
knob or handle in the centre, and a number of notches on its outer
circumference corresponding with a number of slotted projections
formed on the interior surface of the filter pot. These notches and
projections together form bayonet catches, and allow of the perforated
diaphragm being casily placed in or removed from the filter pot, when
required to change or renew the animal charcoal or other filtering ]
medium.
When charcoal is employed I prefer a layer of coarse powdered
charcoal at bottom, then a layer of fine charcoal, and a layer of coarso
charcoal on the ton.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 2
filed by the said William Robert Maguire in the Great Seal Patent
Office on the 8th November 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT MAGUIRE, of the Firm of Maguire and Sou, of Dawson Street,
in the City of Dublin, Ireland, send greeting.
2
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of May, in the year of our
Lord One thousand cight hundred and seventy-three, in the thirty-sixth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said William Robert Maguire, Her special licence 3
that I, the said William Robert Maguire, my executors, administrators,
and assigns, or such others as I, the said William Robert Maguire,.

page_text: my exccutors, 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,
usc, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, thec Channel Islands, and Isle of Man, an Invention for "AN
IMPROVED WATER FILTER," upon the condition (amongst others) that I, the
said William Robert Maguire, my exccutors or administrators, by an
instrument in writing under my, or their, or one of their hands and
scals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Scal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said William Robert Maguiro, do hereby
declare 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, reference being had to the Drawing
hereto annexed, and to the figures and letters marked thereon, that is to
say:
This Invention consists in the construction of an improved water filter,
in which the filtering material can be renewed or changed in a very
short, time, allowing also the interior of the filter to be easily and
thoroughly cleansed when required.
The outer case of the improved filter is made as usual of stoneware or
other suitable material. In this outer case I place an inner case or
filter pot, which is moveable to allow of its being taken out when it is
required to clean the interior of the filter containing the water, or to
renew or change the animal charcoal or other filtering material employed.
The said filtering medium is placed in the lower part of the filter pot,
and is kept in its place by means of a perforated diaphragm having
a knob or handle in the centre, and a number of notches on its outer
circumference corresponding with a number of slotted projections formed
on the interior surface of the filter pot. These notches and projections
together form bayonet catches, and allow of the perforated diaphragm
being casily placed in or removed from the filter pot, when required to
change or renew the animal charcoal or other filtering medium; or

page_text: instead of the perforated diaphragm I sometimes employ a smaller case
to fit into the filter pot, and having a perforated bottom.
When charcoal is employed, I prefer a layer of coarse powdered
charcoal at bottom, then a layer of fine charcoal, and a layer of coarse
charcoal on the top.
To make my Invention better understood I will now proceed to
describe the same by reference to the accompanying Drawing, in which
Figure 1 is a front elevation of my improved filter; Figure 2, a plan;
and Figure 3, a vertical section of the filter, the cover being removed;
Figure 4, elevation of cover; Figure 5, plan of inside of cover; Figure 6,
elevation of filter pot; and Figure 7, section of filter pot, shewing the
charcoal or other filtering medium, kept in position by a perforated case
fitting into the filter pot, instead of by the perforated diaphragm.
Similar letters in all the Figures represent similar parts.
a, a, is the outer case of the filter, made as usual of stoneware or
other suitable material; b, cover of the filter%; c is the inner caso or
filter pot, in the bottom part of which is placed the animal charcoal or
other filtering medium d, d, d'; e is the perforated diaphragm, having a
knob fin the centre; I, I, J, are the notches on the outer circumference
of the diaphragm e; h, k, h, are the slotted projections on the interior
surface of the filter pot. These notches 9 and projections / together
form bayonet catches. i, storage chamber for filtered water; j, tap for
drawing off the filtered water. I prefer employing stoneware taps. By
this improved construction of filter if it is desired to clean out the filter
or to renew the filtering medium, the cover is removed, and the filter
pot c taken out of the case a. The interior of the filter case can then
be casily cleaned out, and by withdrawing the perforated diaphragm e
from the filter pot c, the filtering medium d, d, d', can be casily
removed and renewed.
Instead of employing the perforated diaphragm e for holding the
filtering medium d, d, d', in the filter pot c, I sometimes employ a case k
made of suitable material, having a perforated bottom and fitting into
tho filter pot c, as shewn in section at Figure 7.
Having thus described my Invention, and the best means I am
acquainted with for carrying the same into effect, what I claim and
wish to be protected by the herein in part recited Letters Patent is, the

page_text: improved construction of water filter, substantially as herein-beforo
described and represented in the accompanying Drawing.
In witness whereof, I, the said William Robert Maguire, have
hereto set my hand and scal, this Seventh day of November, in
the year of our Lord One thousand eight hundred and seventy-
threc.
WILLIAM ROBERT MAGUIRE. (L.S.)