Improvements in the Method of Filtering Fluids.
Year: 1896

page_text: Date of Application, 15th Aug., 1898
Complete Specification Left, 14th May, 1897-Accepted, 17th July, 1897
PROVISIONAL SPECIFICATION.
Improvements in the Method of Filtering Fluids.
We, JOHN EMIL BENNETT, of 60, Ridgway Street, Moss Side, Manchester, in the
County of Lancaster, and HENRY BERESFORD, of Tetlow Fold Farm, Godley, in
the County of Chester, Engineers, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in the method of filtering fluids.
Hitherto in the process of filtering, the fluid has been caused to descend through
the filtering medium, so as to leave the solid matter suspended in the fluid upon
the top of the said filtering medium.
This method of filtering is defective as the said solid matter very soon chokes
up the upper surface of the said filtering médium and thus renders it inoperative
until the said solid matter is removed from the filtering medium which is a great
source of trouble and loss of time.
The object of our invention is to overcome the said defects and provide a method
whereby the said filtering medium is much less liable to be choked and the said
solid matter can be more quickly and thoroughly removed from the filtering
medium, than heretofore has been the case.
To this end our improved method of filtering fluids consists in causing the fluid
to ascend through the filtering medium instead of to descend and thus collect the
solid matter on the lower surface of the filtering medium and allow the same to
gravitate gradually to the bottom of the vessel, tank or cistern in which the
filtering medium is employed.
When desired to thoroughly cleanse the filtering medium, the supply and
delivery of water are suitably cut off and the filtered fluid allowed to descend
through the filtering medium which frees the same from the solid matter removed
from the fluid, the same falling to the bottom of the said vessel, tank or cistern.
The fluid to be filtered may be caused to ascend through the said filtering
medium by giving it sufficient fall or by pressure and the vessel, tank or cistern
containing the same formed as may be found most convenient.
Dated this 14th day of Anouat 1896
F. BOSSHARDT & Co.,
Agents to Applicants.
Improvements in the Method of Filtering Fluids.
We, JOHN EMIL BENNETT, of 60, Ridgway Street, Moss Side, Manchester, in the
County of Lancaster, and HENRY BERESFORD, of Tetlow Fold Farm, Godley, in
Price 8d.]

page_text: the County of Chester, Engineers, 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 improvements in the method of filtering fluids, say
sewage or other polluted water.
Hitherto in the process of filtering, the fluid has been caused to descend through
the filtering medium, so as to leave the solid matter suspended in the fluid upon
the top of the said filtering medium.
This method of filtering is defective as the said solid matter very soon chokes
up the upper surface of the said filtering medium and thus renders it inoperative
until the said solid matter is removed therefrom which is a great source of trouble
and loss of time.
The object of our invention is to overcome the said defects and provide a method
whereby the said filtering medium is much less liable to be choked and the said
solid matter can be more quickly and thoroughly removed from the filtering
medium, than heretofore has been the case.
And in order that our invention may be more fully understood we have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures, Fig. 1 being a vertical section and
Fig. 2 a plan of a plant adapted to filter and cleanse the filtering medium in:
accordance with our improved method.
a is the tank of the filter which is hopper shaped, 6 the filtering medium, c the
channel for the inlet of the fluid to be filtered, d the pipe for the outlet of the
filtered fluid and e the pipe for the outlet of the solid matter or effluent, c' is
the inlet valve, d' & e' are outlet valves, the relative positions of said valves shown
in the drawing being that when cleansing the filtering medium. The front of
the filter is fitted with a partition f which reaches to the top of the tank a.
According to our invention we cause the fluid to ascend through the filtering
medium b so as to collect the solid matter on the lower surface of the filtering
medium b and thus allow the same to gravitate gradually to the bottom of the
tank a.
When desired to thoroughly cleanse the filtering medium b, the supply and
delivery of the fluid are suitably cut off, say as shown in the drawings, by means
or the valves c' & d' respectively and the filtered body of fluid above the filtering
medium 6 is allowed to descend and flush through the same. This flushing
action removes the solid matter which may have accumulated at the underside
or in the filtering medium b from the same and falling to the bottom of the
tank a runs off through the pipe e, the valve e' of which is open.
When it is desired to recommence the filtering operation the inlet and outlet
valves c & are opened and the outlet valve e closed as will be readily under-
stood which will cause the water in the tank a to rise to the level as indicated by
dotted line 9, Fig. 1.
The said valves may be operated by hand or mechanical means at predetermined
intervals as may be found most convenient.
The fluid to be filtered may be caused to ascend through the said filtering
medium by giving it sufficient fall or by pressure and the vessel, tank or cistern
containing the same formed as may be found most convenient.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is:-
A method of filtering fluids, consisting in causing the fluid to ascend through the
filtering medium and removing the solid matter accumulated on or in the same

page_text: by causing the body of filtered water above the filtering medium to pass or flush
through the same, all substantially as and for the purpose set forth.
Dated this 13th day of May 1897.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants.