Improved Appliances or Machinery for use in Sifting “Potters' Slip."
Year: 1892

page_text: Date of Application, 8th July, 1892
Complete Specification Left, 8th Apr., 1893-Accepted, 27th May, 1893
PROVISIONAL SPECIFICATION.
Improved Appliances or Machinery for use in Sifting “Potters' Slip."
JOHN CUTHBERT BAILEY, Earthenware Manufacturer, and HENRY PODMORE,
Potters Foreman, both of Nile Street Works, Burslem, Staffs. do hereby declare
the nature of this invention to be as follows:
66
This our invention has reference to improvements in machinery or appliances
known as "sifting boxes," used for sifting
potters slip," the object of our said
invention being to retard the wear of the framing of each "lawn
machinery or appliances.
"
or sieve of such
To carry our said invention into practice we construct or make a framing by
any suitable means and of any suitable material or materials, shape and size, to
which framing we attach, fit or fix suitably shaped slabs or bearings of glass or
other suitable material or materials within and transversely across such framing at
or near to each of its ends, and we fit, fix or attach one or more slabs of glass or
other suitable bearing material between such end slabs, as bearing surfaces for the
trays of such sifting boxes.
One or more suitably shaped "lawns" or sieves being fitted, fixed or mounted
about mid-way of the width of each tray, or such "lawns" may be placed between
rollers, wheels or their equivalent, which are mounted loosely on axes fitted or
fixed to the top surface of such trays, and to one of the sides or ends of such trays
of such boxes we attach or connect the end or ends of a suitably shaped rod or
lever which is connected by any suitable means to a crank or its equivalent, so that
when the crank is rotated or set in motion, the trays of such shifting boxes will
have a reciprocating motion imparted to them, and when such trays are made
according to the latter description such sieves will have a tendency to rotate
between the said rollers during, and at the termination of each backward and
forward stroke.
It will be easily understood that the trays of sifting boxes as ordinarily made are
rigidly fixed to the framing of such machines, the "lawns" or sieves being caused
to slide to and fro on suitable slabs or bearings on the top surface of the trays, by
means of reciprocating motion imparted to such "lawns" by cranks and levers or
other suitable tneans, directly attached or fixed to the framing of the "lawns," and
we have found by experience that "lawns" reciprocated in such a manner are soon
rendered useless by reason of the strains on their framing.
Dated this 7th day of July 1905
JOHN NEWTON,
Longport, Staffs., Agent for Applicants.
COMPLETE SPECIFICATION.
Improved Appliances or Machinery for use in Sifting "Potters' Slip."
We, JOHN CUTHBERT BAILEY, Earthenware Manufacturer, and HENRY
PODMORE Potter's Foreman both of Nile Street Works, Burslem, Staffordshire,
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 our invention has reference to improvements in appliances or machinery
known as sifting boxes used for sifting potter's "slip," the object of our said
invention being to mount the "lawns" of such boxes, and transmit reciprocating
motion thereto so as to lengthen the life or period for using such "lawns."

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To carry our said invention into practice we construct a framing of wood or
other suitable material or materials of any suitable shape and size, within which
framing and transversely across same we mount, fit or fix two or more flat or other
suitably shaped slabs or plates of smooth glass as bearing surfaces for the frame-
work trays of our improved sifting boxes, the said trays we make of any suitable
wood or woods; but preferably of oak, to the underside of which trays we attach
or fix by any suitable means two or more transverse bars, rods or strips of oak or
other suitable wood of any suitable shape and size, the underside of which strips
when such trays upon which the "lawns are mounted are reciprocating bear upon
the aforesaid transverse slabs or glass bearings.
One or more suitably shaped "lawns or sieves are fitted, fixed or attached by
any suitable means at suitable distances apart on the top surface of such trays, but
we prefer to fix such lawns between three or more rollers, wheels or their
equivalent, which are mounted slackly on vertical axes attached or fixed to the top
surface of such trays. To one side of the back part of the framework of such
trays we attach or connect by any suitable means one end of suitably shaped levers
or rods, which we connect by any suitable means to a crank or its equivalent, so
that when such crank is rotated, the tray or trays of such sifting boxes will have a
reciprocating motion transmitted to them, and when the 'lawns" of such boxes
are slackly fitted between three or more rollers or their equivalent as herein before
described such trays will be caused to slightly rotate between the said rollers.
In order that our said invention may be more readily understood and explained
in detail we have hereunto annexed a sheet of drawings on which letters of reference
are marked on corresponding parts on all the figures alike.
DESCRIPTION OF DRAWINGS.
Figure 1 is a longitudinal sectional elevation of a double decked sifting box,
shewing the "lawns" mounted according to our invention.
Figure 2 is a transverse sectional elevation of Figure 1.
Figure 3 is a plan view of a tray made according to our invention, showing two
"lawns" in dotted lines mounted between rollers.
Figure 4 is an elevation of a part of a wood tray, shewing one method of mounting
earthenware or pitcher rollers.
Figure 5 is a plan view of the roller shewn at Figure 4.
Figure 6. is a side elevation, shewing the improved mechanism we prefer to use
for imparting a reciprocating motion to the "lawns" of sifting boxes.
Figure 7 is a plan view of the mechanism shewn at Figure 6.
Figure 8 is a side elevation shewing the ordinary method of mounting the
"lawns" of sifting boxes direct upon glass bearing slabs, and a suitably shaped
metallic rod connection for use in transmitting motion to such "lawns."
Figure 9 is a front elevation of Figure 8.
The above figures are not drawn to any particular scale; but are given to shew
the method of carrying out our invention.
"
In these figures a is the wood casing of our improved sifting box, into the top
compartment 6 of which "slip" is conveyed to or conducted by any suitable means
from a "slip" mixing machine, from such compartment 6 the flow of "slip" is
regulated by means of valves c through apertures 62 into the "lawns d, d²
mounted between earthenware rollers e on the top surface of a wooden tray f, to
the underside of which trays are fixed or attached wood bearing rods or bars g,
which bear upon the glass slabs or bearings which extend from the front part of
the casing a to the back part.
When a reciprocating motion is transmitted to the trays f, f2 on which the
"lawns" d, d², d³ and d are mounted by means of the rods or levers i, i, j, j², rod
or bar k, levers 1, 2 and crank m, the slip is permitted to flow from the com-
partment b, through orifices 62 into the interior of the "lawns", d through the
gauze or silk bottoms of which "lawns" it flows into a space n having inclined

page_text: sides 63, through holes or apertures into the lawns d³ and d' on the lower deck of
the sifting box, the slip then flows through the gauze or silk bottoms of such
"lawns
into a space n² having inclined sides 6, then through apertures & into a
compartment from whence it flows through one or more apertures 68 and is
conveyed or conducted by pipes or other suitable means to a press ark for further
treatment. On reference to Figures 8 and. 9 it will be understood that when
reciprocating motion is transmitted to "lawns" bearing direct upon glass slabs
by means of a metallic rod or rods h² as shewn, the framing of such lawns is soon
damaged, and the "lawns" rendered useless. As herein before stated we fix such
"lawns" between three or more horizontal wheels or rollers, preferably four
earthenware rollers e as shewn at Figure 3, mounted on or around vertical axes
fixed to wooden trays f. To the underside of the back part of the frame of each
tray we place one or more metallic plates 3, each one being welded or otherwise
suitably connected to rods or levers i, we then place a metallic or other suitable
plate on the top side of the back part of the frame of each tray f, and connect
the said plates and the back part of the frame of each tray together by bolts and
nuts, rivets or other suitable means, we are thus enabled to prolong the life or use
of the "lawns" as the strains are transmitted to the wood trays on which they
are mounted, instead of to the framing of the "lawns" as is the case when mounted
in the usual way.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is ;-
The mounting of "lawns" in sifting boxes on the top surface of suitably shaped
wooden trays between three or more earthenware, hard wood or other wheels or
rollers of any suitable material mounted on vertical axes attached or fixed to such
trays, the said trays having two or more bars or strips of wood or other suitable
material attached or fixed to their underside in suitable positions for bearing or
sliding on glass slabs or bearings when reciprocating motion is transmitted to such
"lawns" and trays by suitably shaped levers or cranks in the manner and for the
purpose as herein substantially described set forth and illustrated on the drawings
hereunto annexed.
Dated this 6th day of Anvil 1909
JOHN NEWTON,
Longport, Staffs., Agent for Applicants.