IMPROVEMENTS IN THE CONSTRUCTION OF FILTER PRESSES
Year: 1881

page_text: LETTERS PATENT to Henry Edward Newton, of the Office for Patents,
66, Chancery Lane, in the County of Middlesex, Civil Engineer, for an
Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF FILTER PRESSES."
A communication from abroad by Albert Louis George Dehne, of Halle on the
Saal, in the Empire of Germany.
COMPLETE SPECIFICATION filed by the said Henry Edward Newton at
the Office of the Commissioners of Patents on the 9th February 1881.
HENRY EDWARD NEWTON, of the Office for Patents, 66, Chancery Lane, in the
County of Middlesex, Civil Engineer. "IMPROVEMENTS IN THE CONSTRUCTION
OF FILTER PRESSES." A communication from abroad by Albert Louis George Dehne,
of Halle on the Saal, in the Empire of Germany.
This Invention relates to that class of filter press in which chambers are formed
to receive the liquid to be filtered by placing together a number of filter frames
and press plates with a filtering medium between, the filter frames and plates being
tightened up by means of screw pressure...
In these presses it is necessary in order to remove the filled filter frames to
withdraw the screw a considerable distance so as to leave room for removing or
shifting the frames and plates. This withdrawing of the screw and the screwing
up again to tighten the filter frames takes up much time, and it is the object of
the present Invention to avoid this loss of time by so constructing the press that
the requisite movement of the screw will be reduced to a minimum.
To this end in order to reduce this movement of the screw to a minimum the
cross bead of the press in which the screw takes is arranged to turn on its
horizontal axis, thus by unscrewing the screw, say, about two turns, it will be
withdrawn from the moveable head plate of the press a sufficient distance to
allow of its being brought from its horizontal position into a vertical one by turning
the cross head on its axis, and the filter frames and press plates constituting the
filtering apparatus may then be easily removed or shifted.
In the accompanying Drawing, Fig. 1 is a side view, Fig. 2 an end view,
Fig. 3 a plan view of the improved filter press.
and

page_text: The framework of the press consists of the side rods or rails a, a, fixed head
plate a¹, and cross head A mounted on standards b, b'. The rails a, a, rest in
recesses in the standards b, b, and are connected to the same by studs or bolts and
nuts c, c.
These studs or bolts are formed with enlargements, parts of which enter
recesses in the rails a, a, the remainder serving as pivots on which the cross head A
rocks. The bolts are provided with nuts, which when tightened up will, by reason
of the shoulders on the bolts c, c, draw the parts a and b firmly together. The cross
head A is provided on both sides with projections d, d, and e; e, the projections d, d,
resting on the rods a, a, so as to limit the turning of the cross head A in one
direction, as shewn in Figures 1, 2, 3, and the projections e, e, striking against the
standards b, b, so as to limit the turning of the cross head in the other direction, as
shewn by dotted lines, Fig. 1.
In order to turn the screw, a disc D is keyed upon the free end thereof, the disc
being formed with radial grooves on its outer surface, the free end of the screw
spindle terminating in a pin m provided with a collar. A lever n is fitted over this
collar and is allowed to take into one of the radial grooves on the disc D. On
power being applied to the lever handle the disc will be turned in one direction or
the other and will turn the screw to open or close the press, as shewn in Fig. 1 by
dotted lines. The screw may vary in length, such length being subject to the
number of plates, frames, or chambers to be inserted in the press.
The parts may
be so balanced that a slight pressure only on the upper part of the disc D will be
required to rock the cross head A, ninety degrees, that is so say, to turn it from
the position shewn in full lines to that shewn in dotted lines, Fig. 1.
If desired any well known catch or holding device may be employed to keep the
turning parts in position, such device being readily unlocked as required.
"
Having now described the nature of the said Invention for "Improvements in
the Construction of Filter Presses as communicated to me by my foreign
correspondent, and explained the manner of carrying the same into effect, I wish
it to be understood that I claim, the arrangement of cross head A, substantially
as herein shewn and described, whereby the withdrawal of the pressure screw and
the screwing up of the same is readily effected without loss of time, as and for the
purpose set forth.
In witness whereof, I, the said Henry Edward Newton, have hereunto set
my hand and seal, the Ninth day of February, in the year of our Lord
One thousand eight hundred and eighty one.