Year: 1896

page_text: We, WILLIAM THOMAS WHITEHEAD, and JOHN WOLSTENHOLME, both of
Albert Works, Radcliffe, in the County of Lancaster, Engineers, do hereby
declare the nature of this invention to be as follows:--
This invention relates to that class of presses for filtering sewage in which a
number of plates are employed having grooved faces covered with sackcloths and
a passage in the middle through which the sewage enters.
In practice it has been found that when forcing the sewage through the said
press the said sackcloths embed themselves into the grooves of the said plates
which causes the fluid or filtered part of the sewage to run off very slowly and thus
render the filtering operation not rapid enough.
The object of this invention is to provide means whereby the said defects are
overcome and the press thus rendered more effective.
To this end instead of placing the said sackcloths directly upon the grooved
faces of the said plates we interpose between the same a perforated plate or instead
of having the press plate solid we may form it with two or more perforated plates
stayed apart from each other and secured into a frame leaving also a passage in
the middle for the inlet of the sewage. When employing more than one of the
said perforated plates at each side of the said press plate, the perforations in the
same increase in size.
According to another form of our invention we may form the said press plates
with openings which intersect and vertical grooves between the same to allow the
fluid to run from one of the said openings to the other.
In connection with each form of press plate described, we arrange in the bottom
edge of the plate a channel and ports communicating therewith and with the
aforesaid grooves through which the filtered fluid is allowed to run out of
the press.
Dated this 9th dor of June 1906
F. BOSSHARDT & Co.,
Agents to Applicants.
WILLIAM THOMAS WHITEHEAD and JOHN WOLSTENHOLME, of the Albert
Works, Radcliffe in the County of Lancaster, 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 that class of presses for filtering sewage in which a
number of plates are employed, having grooved faces covered with sackcloths and
a passage in the middle through which the sewage enters.

page_text: In practice it has been found that when forcing the sewage through the said
press, the said sackcloths embed themselves into the grooves of the said plates
which causes the fluid or filtered part of the sewage to run off very slowly and thus
render the filtering operation not rapid enough.
The object of this invention is to provide means whereby the said defects are
overcome and the press thus rendered more effective.
To this end instead of placing the said sackcloths directly upon the grooved
faces of the said plates, we interpose between the same a perforated plate, or
instead of having the press plate solid, we may form the same with two or more
perforated plates stayed apart from each other and secured into a frame leaving
also a passage in the middle for the inlet of the sewage.
When employing more than one of the said perforated plates at each side of the
said press plate, the perforations in the same increase in size.
According to another form of our invention we may form the said press plates
with openings which intersect and vertical grooves between the same to allow the
fluid to run from one of the said openings to the other.
In connection with each form of press plate described, we arrange at the bottom
edge of the plate a channel and ports communicating therewith and with the
aforesaid grooves through which the filtered fluid is allowed to run out of
the press.
And in order that our invention may be fully understood we have caused to be
appended hereunto one sheet of drawings marked with letters of reference to
which we will now refer and indicate the manner in which our invention may be
carried into effect though we wish it to be understood that we do not confine
ourselves to the exact arrangement of detail shown, as the same may be modified
without departing from the principle of our invention.
Fig. 1 is a plan of a press plate having four holes drilled in bosses prepared to
receive perforated plates of steel on both sides, which may be held by nicked head
screws, and of which only a few of the perforated holes are shown.
Fig. 2 is a sectional elevation horizontally and Fig. 3 a sectional elevation
vertically of the said plate.
Fig. 4 is a sectional elevation vertically of a frame cast as Fig. 1 but without
the corrugated middle, being open for two or more perforated plates stayed
apart from each other to be secured as described in the Provisional Specification.
In each figure A is the press plate, B B, the perforated steel plates.
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 interposition of one or more perforated plates of steel or other metal
which may be found in practice equally or more durable, between each of the
corrugated faces of the plates of presses for filtering sewage or other liquids, and
the sackcloths which are usually attached thereto.
2. The application, in a cast iron frame of two or more such perforated plates
stayed apart from each other and held together by bolts passing through, with a
passage hole in middle for inlet of the sewage.
Dated this Fourth day of March 1897.
WILLIAM THOMAS WHITEHEAD.
JOHN WOLSTENHOLME.