Improvements in and in the Construction of Wood Trays for Filter Presses.
Year: 1891

page_text: Date of Application, 17th Sept., 1891
Complete Specification Left, 17th June, 1892-Accepted, 17th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in and in the Construction of Wood Trays for Filter
Presses.
JAMES TEGGIN, Clayton Street Engineering Works, Longton, Staffordshire,
Engineer, do hereby declare the nature of this invention to be as follows:-
This my invention has reference to improvements in, and in the construction of
wood trays for filter presses, and the object of my said invention is to make such
trays of necessary strength whilst reducing their weight and at the same time
maintaining their efficiency, that is to say by constructing such wood trays for
filter presses according to my invention I am enabled to make filter presses of
equal capacity to those made in the ordinary manner, but to occupy about half the
space.
It is well known that the wood trays of filter presses as ordinarily constructed
are usually made about three and three-quarters inches thick.
In carrying my said invention into practice I make such trays of red deal, pine
or oak, but preferably of oak of any suitable thickness, the blocks or panels of such
trays being made of equal thickness and strength for the full depth of the tray,
instead of tenoning them as at present at the top and bottom ends. Along and
against one edge of each face of each tray I fix or fasten by any suitable means
wood strips of any suitable shape and size for the purpose of strengthening such
trays, and I fix or fasten a wood "stop" of suitable shape and size a short distance
from each end of such trays, and about two and a quarter inches from the top edge
of such trays to the bottom strip, so that such trays may be taken hold of and
moved apart, or from one place to another, instead of as at present fixing such
stops" at the ends of such trays and cutting hand-holes through such blocks for
that purpose. The holes or apertures for receiving the nozzles of the filter press
taps I cut or form through the body of the tray thus leaving the top strip of the
full thickness, instead of diminishing the strength of the strips of such trays as is
at present done, by cutting or forming a part of the aperture for such taps through
the top front face of one tray and the top back face of the next tray where they
meet or touch against each other.
$6
Dated this 15th day of September 1891.
JOHN NEWTON,
Longport, Staffordshire, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in and in the Construction of Wood Trays for Filter
Presses.
JAMES TEGGIN, Clayton Street Engineering Works, Longton, Staffs., 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 my invention has reference to an improved construction of wood trays for
filter presses, the object of my said invention being to reduce the weight, maintain
their efficiency and at the same timè to make them of sufficient strength, that is
invention
to say by constructing such wood trays for filter-presses according to my
I am enabled to make filter-presses of equal capacity to those made in the ordinary
manner, but with less labour and material.

page_text: Each filter-press tray as ordinarily constructed is made from deal, and about
three inches and three-quarters of an inch in thickness.
In order that my said invention may be readily understood and explained in detail
I have hereunto annexed three shects of drawings on which letters of reference
are marked on corresponding parts on all the figures. alike..
DESCRIPTION OF DRAWINGS.
Figure 1 is a side elevation of a filter-press tray of usual size, and made in the
ordinary'way, with some of the blocks omitted.
Figure.2 is a plan view of Figure 1.
Figure 3 is an end view of Figure 1.
Figure 4 is an end view of six filter press trays of ordinary construction placed
in position one against the other.
Figure 5 is a side elevation of a filter press tray made according to my invention,
with some of the blocks omitted.
:
-
Figure 6 is a plan view of Figure 5.
Figure 7 is an end view of Figure 5.
Figure 8 is an end view of six filter-press trays made according to my invention
placed in position one against the other.
Figure 9. is an enlarged view of Figure 3.
Figure 10 is an end view of one block of a filter press tray of ordinary con-
struction.
Figure 11 is a side elevation of one block of a filter press tray of ordinary
construction.
Figure 12 is a sectional plan view taken through the line A-B of Figure 11.
Figure 13 is an end view of one block of a filter press tray made according to
my invention.
:
Figure 14 is a side elevation of Figure 13.
Figure 15 is a sectional plan view taken through the line C-D of Figure 14.
Figure 16 is an enlarged plan view of Figure 4, and
Figure 17 is an enlarged plan view of Figure 8.
On these figures a³ and a³ represent intermediate blocks of an ordinary filter
press tray made of pine or red deal, b, 668 and top and bottom wood
strengthening strips which are secured or nailed to the rebated ends of the blocks.
It will be understood on reference to the drawings that a great deal of labour
is requisite to form the rebates at the top and bottom ends of the ordinarily con-
structed blocks, and to form the hand holes c, c², c³, and c formed in one side of
each end strip d on the end blocks of each tray, the grooves e on both sides of cach
block extending from, the strips b, b2 at one end to the strips 63 and 6 at the other
end of such blocks,, the said strips 6, 62, 63 and 6 being screwed to, and extending
from one end of each tray to the other end.
"
In my improved construction of filter-press trays I form the blocks and strips
preferably
from oak, although deal; pine or other suitable wood may be used, each
block. I make without a rebate, and. screw or nail such blocks f to a bottom
strengthening strip g on one side, and to a rebated strengthening strip on the
top and opposite side as shewn, or 1 may make such top strengthening strip of two
'separate parts, so as to avoid making a rebate in such strips, and I fasten such
strips which extend from one end of such trays to the other end, to such blocks by
screws, nails or other suitable means.
The grooves i in each side of my improved blocks extending from end to end of
such blocks as shewn at Figures 5 and 14 on the drawings annexed.
At a suitable distance from each end, and on one side of each tray and extending
from the bottom strengthening strip g of such trays to about two and a quarter
inches from the top edge of the block; I fix or fasten a wood strip or stop j of
suitable shape and size, so that such trays may the more easily be taken hold of
or moved apart, or from one place to another, instead of as in the ordinarily con-

page_text: structed filter press trays fixing such stops d at the ends of such trays, and cutting
or forming hand-holes in each end stop for the purpose herein before mentioned.
A filter press made according to my invention of the same length, and same
number of chambers as an ordinarily constructed filter press, will produce the same
quantity of clay, be equal in strength, require less labour and material in
construction, be about three-fourths of the weight, and last about one-third in time
longer.
On reference to Figure 4 which is an end view of six filter-press trays of ordinary
construction placed in position one against the other, and to Figure 8 which is an
end view of six filter-press trays made according to my invention, and placed in
position one against the other, it will be seen that an equal number of filter press
trays when made according to my invention and placed one against the other,
occupy a great deal less space.
at
In connection with my improved construction of filter press trays I prefer to
use filter press taps having an oval or elliptical cross-section, and I make the
holes or apertures for receiving the nozzles of such filter press taps of an oval or
elliptical shape through the body of the trays, as shewn by dotted lines
Figure 8 and in full lines at Figure 17 on Sheet 3 of the drawings, thus leaving
the top strip of such trays of the full thickness, instead of diminishing the strength
of the strips of the trays as is usually done by cutting or forming a part of
the apertures for the nozzles of filter press taps which have a rectangular cross-
section, partly through the top front face of one tray and partly through the
top back face of the next tray where they meet or touch against each other, as
shewn by the dotted lines at Figure 4, and in full lines at Figure 16 on Sheet 3
of the drawings.
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 ;-
The construction of filter-press trays, each grooved block of which is made without
a rebate at either of its ends, and having wood strengthening strips, one g on one
side, and a strengthening strip near to the top end and on the opposite side, and
on each end block of each tray a wood strengthening strip j, each of which strips j
extend from the strengthening strip g on one side of the end blocks of each tray
to about two and a quarter inches from the top edge of such end blocks, and a
suitable distance from the outer end of such end blocks, in the manner and for the
purpose as herein substantially described set forth and fully illustrated on the
drawings hereunto annexed.
Dated this 16th day of June 1892.