IMPROVEMENTS IN FILTER PRESSES
Year: 1882

page_text: LETTERS PATENT to William George Strype of Wicklow in the County of
Wicklow. Ireland. Civil Engineer, for an invention of "IMPROVEMENTS IN
FILTER PRESSES"
•
PROVISIONAL SPECIFICATION left by the said William George Strype at
the Office of the Commissioners of Patents on the 7th March 1882.
WILLIAM GEORGE STRYPE of Wicklow in the County of Wicklow, Ireland
Civil Engineer. "IMPROVEMENTS IN FILTER PRESSES
"
My invention relates to the improvement in filter presses whereby I simplefy
their construction and obviate the liability that the filter plates have to fracture
owing to the existence of central or cross grooves or channels and outlet holes for
the discharge of the filtered liquid
According to my Invention I carry the grooves or channels through the bottom
or other sides of the filter plates, which with the filter cloth form the joint between
the plates instead of terminating the grooves or channels in cross grooves as is now
the case.
The filtered liquid is thus delivered direct to the exterior of the press either at
the bottom or other sides as may be wished and may be received into any suitable
trough or receptacle common to the whole of the plates provision being made for
intercepting the liquid coming from any particular plate or plates, when necessary,
either by the interposition of a subsidiary trough or otherwise.
This invention is applicable to filter presses constructed wholly of cast iron,
wood or other material ordinarily employed, as well as to filter presses constructed
partly of a metal such for example as cast iron but lined or covered with another
metal such for example as lead, less susceptible to the action of acids.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William George Strype in the Great Seal Patent Office on the
5th September 1882.
WILLIAM GEORGE STRYPE of Wicklow in the County of Wicklow Ireland
Civil Engineer
"IMPROVEMENTS IN FILTER PRESSES
"
My said Invention relates to improvements in filter presses whereby I simplify
their construction and obviate the liability that the filter plates have to fracture
owing to the existence of cross grooves or channels and outlet holes in their
substance for the discharge of the filtered liquid
According to my said Invention I continue or carry the face grooves or channels
or any required number of them through the bottom or other sides of the filter
plates which, with the filter cloths form the joint between the plates instead of
terminating the said Grooves or channels in cross grooves as is now the case. The
filtered liquid is thus delivered direct to the exterior of the press either at the
bottom or other sides as may be desired and may be received into any suitable
trough or receptacle common to the whole of the plates provision being made for
intercepting the liquid coming from any particular plate or plates, when necessary,
either by the interposition of a subsidiary trough or otherwise
And in order that the said Invention may be perfectly understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several Figures on the accompanying sheet of drawings the same letters of
reference indicating corresponding parts in all the Figures
Figure 1. of the accompanying drawings represents an elevation of a square
filter plate constructed according to my said Invention with the supports for the
plates in the filter press shewn in section
Figure 2 is a transverse section corresponding to Figure 1 of two of a series of
such plates
Figures 3 and 4 and Figures 5 and 6 are respectively views similar to figures 1
and 2 illustrating two modifications of circular plates constructed according to my
said Invention
Referring to the arrangement illustrated in Figures 1 and 2 A Figure 1
represents one of a series of square plates having lugs a a which rest upon
supports bb of a filter press, the series of plates with suitable distance pieces or
frames and filter cloths interposed being forced into close proximity under pressure
in any usual or suitable manner. A A Figure 2 represent two of such plates
separated by a frame B forming a chamber C between the two plates into which
the liquid or semifluid to be filtered is introduced in any known manner, say for
example by the central hole d as shewn, the filtered liquid passing through the
interstices of the filter cloths e and along a series of grooves or channels f formed
in the surface of the plates as is well understood.
In the ordinary construction of filter plates the grooves or channels f terminate
at or about the dotted line g g in cross grooves leading into longitudinal or other
outlet boles which extend from one side to the other of the plates for the discharge
of the filtered liquid but the existence of these cross grooves and outlet holes is
objectionable and renders the plates liable to fracture. According to my said
Invention I simplify the construction of the plates and obviate their liability to
fracture from the cause before mentioned by carrying the grooves or channels f.
through the bottom of the filter plates as shewn at fl or through any other side of
the filter plates. The filtered liquid is thus delivered direct to the exterior of the
either at the bottom or other sides as may be desired and may be received
press

page_text: into any suitable trough or receptacle common to the whole of the plates, provision
being made for intercepting the liquid coming from any particular plate or plates
when necessary either by the interposition of a subsidiary trough or otherwise
Figures 3 and 4 illustrate the application of my said invention to circular plates
having straight grooves or Channels, such grooves or Channels being carried
through to the periphery as shewn at f¹ in a similar manner to the corrisponding
grooves or channels shewn in Figures 1 and 2.
When the invention is applied to circular plates of the character shewn in
Figures 5 and 6 having circular grooves or channels f with radial or intersecting
outlet grooves or channels f I carry the said radial or intersecting outlet grooves
or channels through to the periphery as shewn at f' whereby I also obtain result
similar to that herein before described with reference to figures 1 and 2
My said invention is applicable to filter presses constructed wholly of cast iron
wood or other material ordinarily employed as well as to filter presses constructed
partly of a metal such for example as cast iron but lined or covered with another
metal such for example as lead less susceptable to the action of acids.
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original
and therefore claim as the invention secured to me by the hereinbefore in part
recited Letters Patent is :-
In filter presses, constructing the filter plates with all or a number of face
grooves or channels extending through the bottom or other side or sides of the
filter plates substantially as and for the purpose herein before described
In witness whereof I the said William George Strype have to this my
Specification set my hand and seal this Second day of September in the
year of our Lord One thousand eight hundred and eighty two.

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