Year: 1894

page_text: Date of Application, 23rd Nov., 1894
Complete Specification Left, 23rd Aug., 1895-Accepted, 23rd Nov., 1895
I JOHN HILL of 37 Hollings Street Fenton Stoke-on-Trent Mechanical
Engineer do hereby declare the nature of this invention to be as follows:-
This invention has reference to those filter presses which are used for making
potters clay, or for compressing yeast, or paraffin sewage and other semi-fluids, in
which porous tiles or slabs are employed as the filtering medium, through which
the liquid part of the semi-fluid is forced.
The chief feature of this invention consists in so constructing the said presses,
that the porous tiles slabs or chambers shall be perforated through the centre,
longitudinally of the slabs or chambers, in order to allow the liquid to escape
through the pores from cach side to the perforations in the centre, and out at the
bottom, through a pipe the said pipe to be connected to the air compresser or water
pump, or other source of water or air, so as to force a current therethrough in the
opposite direction to that used in filling the press, so as to prevent their pores
becoming choked with the solid matter, which is a defect in this kind of filter press
as heretofore constructed.
A filter press constructed according to this invention, consists of several sections
each formed of one or more porous tiles to form a slab, or a chamber, of a suitable
thickness being bolted cramped or otherwise cemented together in iron frames, the
iron frames or chambers to be supported on two horizontal bars of sufficient
strength, and suitable distance, supported at each end by frames with back plate
and moving plate, with screws so as to screw the chambers together, leaving spaces
between each slab or chamber of a suitable thickness for the slurry suage or other
semi-fluid, to be forced into through a hole in the centre of the back plate and
through holes in centre of each slab or chamber, the entire length. of the slabs or
chambers to the moving plate.
When the said spaces have become filled with the solid matter, the slabs or
chambers are removed from each other or slid back along the horizontal bars, so as
to allow the solid matter to fall out on to the floor, or into a waggon or other
receptacle to receive it, when each one has been emptied and placed back in its
original position and screwed together, as in the ordinary filter press. Then the
outlets are coupled to the air compresser or pump (turned on to water) that is used
to fill the press, or any other source of air or water scut therethrough in the
opposite direction, to that used in filling the press so as to cleanse the pores of the
solid matter as aforesaid.
Dated this 21st day of November 1894
JOHN HILL 37 Hollings Street Fenton Stoke-on-Trent Mechanical Engineer
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 has reference to those filter presses which are used for making

page_text: potters clay or for compressing yeast or paraffin sewage or other semi-fluids in
which porous tiles or slabs are employed as the filtering medium through which the
liquid part of the semi-fluid is forced. The chief feature of this invention consists
in perforating the porous tiles or slabs whereby the liquid portion of the material
being filtered escapes from each side of the tile to the interior perforations and
thence outwards through the frame by a tube or outlet, the outlet tube being used
for the connection of a current of air water or other cleansing medium which is
forced from the perforations through the filtration surfaces thus cleansing the
filtering pores and restoring the porous tiles to their proper filtering condition.
Fig. 1 shews elevation and Fig. 2 section of a filter press chamber constructed
according to my invention.
Fig. 3 is a section shewing two chambers in working position.
AA is section of the side or straining bars which support the chambers in a
filter press of the ordinary type comprising two side bars oue fixed head one head
sliding on the side bars with the filtering chambers between and one backstay or
crossbars supporting the side bars with central or side closing screws and central
feed for the material to be filtered. B B is frame of cast iron or other suitable
material resting upon the bars AA and supporting and containing the porous
tiles CCC forming one chamber as section Fig. 2. The chamber Fig. 1 is shewn
constructed with three tiles perforated as shewn at E E but any other number or
form of tiles may be used. The perforations E E communicate one with another
and with the outlet tubes F.
The perforations are placed so close together that the fluid to be filtered can
pass freely from the filtering surface G to the perforations E and thence to the
outlet F leaving the solid portion within the space G 2 Fig. 3. I secure the
porous tiles C within the frame B by cementing dovetailing or any suitable means
and I make the joint between the chambers by means of a facing of soft metal,
wood, india rubber, or other suitable jointing material. I construct the frames B B
of wood, metal, or other suitable material and when necessary I protect the
frame B B, if iron, from contact with the material to be filtered by lining pieces
of wood H Fig. 3 or other suitable protecting material.
Fig. 4 shews the application of my perforated tiles in a circular chamber the
same letters refer to the various portions as in Figs. 1 2 and 3.
I may make the chambers of any suitable form. The aperture K forms the
communication between the chambers thro' which the filtering material passes.
I may make these apertures in any form or number. I cleanse the pores of the
tiles by making a suitable connection to the outlet pipes F and forcing therethro'
water, air or other cleansing medium and thus I am able not only to cleanse the
pores but also to test each tile as to its filtering condition.
said
Having now particularly described and ascertained the nature of my
invention and in what manner the same is to be performed I declare that what I
claim is
1. Filter press chambers composed of perforated porous tiles substantially as
described and illustrated.
2. Filter press chambers composed of porous tiles each tile having a series of
perforations communicating with one common outlet whereby water or other
cleansing fluid may be forced therethro' to cleanse & test the said porous tiles as
described.
3. Filter press chambers composed of porous tiles filtering from both sides
of such tiles to the perforations in the centre substantially as described &
illustrated.
Dated this 21st day of August 1805