An Improved Pressure Filter.
Year: 1898

page_text: Date of Application, 2nd Aug., 1898-Accepted, 3rd Sept., 1898
An Improved Pressure Filter.
I, EDWARD JAMES DUFF, of Glengariff, Cressington Park, Liverpool, in the County of
Lancaster, Engineeer, 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 the manufacture of that class of filters known as
"pressure filters" and employed for the filtration of water or other liquids under
pressure.
The nature of my said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference to
the annexed drawings and the following explanation thereof.-
Fig. 1 on the drawings is an elevation, and
<<
Fig. 2 a vertical section of a pressure filter" constructed according to my
invention.
The improved filter consists principally of an outer cylindrical casing of metal a
fitted with a cover b at the top and having a separate chamber cat the base forming
the reservoir for the filtered water or liquid. Inside this casing (in the upper part)
is fixed a filtering stone d of a hollow cylindrical form the upper end of which is closed
in by a metal cover e, and the lower end is fitted into a metal shoe f which is
supported upon the diaphragms cx which divides the upper part of the casing a from
the reservoir ca hole (corresponding with the central opening dx of the filtering
stone) being made through both the shoef and the diaphragm cx and the whole being
bound firmly together and held in place by means of a central bolt g, and a nut h and
bridge-piece i.
kis the inlet cock for admitting the water or liquid to be filtered from the source
of supply under pressure, to the space * between the inside of the metal casing a
and the outside of the filtering stone d, and is the cock for drawing-off the filtered
water or fluid. m is a wash-out cock for cleansing the inside of the casing a.
At the centre of the casing cover b is a liquid-tight packing box or gland n through
which passes a spindle o to the lower end of which is bolted or otherwise fixed a
frame or cage p the lower end of which is supported by and revolves upon the metal
shoe f. This frame or cage carries a vertical brush q which is held against the face
of the cylindrical filtering stone d, and by turning the handler at the top of the
spindle o the brush q will be caused to revolve round the stone and cleanse the outer
surface thereof and prevent the pores from becoming choked.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
First The improved "pressure-filter" constructed and arranged substantially as
hereinbefore described and illustrated by the drawing annexed, and

page_text: Secondly I claim in "pressure-filters" fitted with a fixed cylindrical filter stone,
the combination therewith of a revolving cage or frame carrying a brush or brushes
adapted to cleanse the outside of the said filtering stone when required and capable
of being actuated from the outside of the casing.
Dated this on y
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.