An Improved Method of Filtering and Apparatus therefor.
Year: 1888

page_text: Date of Application, 27th Sept., 1888
Specification Accepted, 23 d Nov., 1888
COMPLETE SPECIFICATION.
An Improved Method of Filtering and Apparatus therefor.
We, HERBERT FITZROY CLAYTON and GEORGE HOLDEN HOLDROYD, both of
Lockwood, Huddersfield, in the County of York, Drysalters, 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:―
This invention relates to a method of filtering muddy or impure water and to
apparatus therefor, and it consisis essentially in first partially or roughly filtering the
muddy or impure water, the mud or sediment separated being retained below the
filtering material and periodically discharged by flushing and then causing the partially
filtered water to rise into cloth-covered perforated tubes where it is still further
filtered by being forced through the cloth which can be easily removed in order to
renew the same.
In order to enable our invention to be fully understood, we will describe how it can
be carried into practice by reference to the accompanying drawing, in which
Figures 1 and 2 are longitudinal and transverse sections respectively of an apparatus
for filtering according to our invention.
A A are filter tubes covered with filtering cloth which is turned in at both ends
of the tubes and secured in position by means of tapering nozzles B and screw
plugs Cactuated by hand wheels and screws N all the said parts being similar to those
described in the specification of the former application of ourselves and Robert Cooper,
No. 5806, dated the 18th April 1888; or the filter cloth may be fixed inside the tubes
instead of being rolled on the outside as peviously described.
According to our present improvements, we fix the said parts in a vertical position
instead of horizontally, by means of the girder A¹ and the standards 13. The water
to be filtered is forced by the pump L through the pipe L' into a channel E forming
the lower part of the primary filtering chamber or cylinder D. The water rises from
the channel E through the grating P upon which is placed a filtering medium K, the
latter being prevented by the top grating O from floating and from being displaced.
The water rises through the filtering medium and through the nozzles B into the
filter pipes A which are covered with filter cloth as described, and as the filtered water
passes through the cloth it falls into the cistern or receiver R whence it flows through
a spout or pipe S to the required place.

page_text: The object of the chamber D with the contained rough filtering medium is to arrest
a large portion of the sediment and heavier or more easily separable particles before
they reach the filtering tubes, whereby the filtering cloth with which the tubes are
surrounded is kept clean for a longer period than would otherwise be the case and
there is not so much liability to force accumulated dirt through the meshes of the cloth
by the force of the water under pressure.
A large portion of mud and sediment accumulates in the channel E under the
bottom grating P and this is periodically washed away into a convenient drain by
opening the valve F through which water then rushes carrying any accumulated
sediment with it.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
(1.) The herein described method of filtering water consisting in first partially or
roughly filtering it, the mud or sediment thereby separated being retained below the
filtering material and periodically discharged by flushing, and then causing the
partially filtered water to rise into cloth-covered perforated tubes to be still further
filtered by being forced through the cloth covering which can be easily removed in
order to renew the same.
(2.) In filtering apparatus, the combination of a primary filtering chamber with
filtering tubes covered internally or externally with cloth, the said chamber being
provided with top and bottom gratings and a channel in which the sediment
accumulates and which is adapted to be readily cleansed, substantially as hereinbefore
described.
(3.) The combination with cloth-covered filtering tubes, of a primary filtering
chamber, a channel to receive the sediment, top and bottom gratings, a blow-out valve
through the medium of which the sediment accumulated in the said channel is
discharged, a girder and standards to support the filter tubes, and a receiving tank R,
substantially as, and for the purpose, herein before described and illustrated in the
accompanying drawing.
(4.) The general arrangement of filtering apparatus herein described and represented
in the accompanying drawing.
Dated the 27th day of Sentember 1888
W. J. BAKER,
2, New Street, Huddersfield,
Agent for the Applicants.