Improvements in or relating to Apparatus for Forming Pottery.
Year: 1889

page_text: Date of Application, 8th Oct., 1889
Complete Specification Left, 31st Oct., 1889-Accepted, 8th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in or relating to Apparatus for Forming Pottery.
EMANUEL WILCOX 13 Riley Street (North) Burslem Staffordshiro Potters Mould
maker for Earthenware, do hereby declare the nature of this invention to be as
follows:-
My improvement in the Chamber Block it adding a natch at the bottom the
previous way of working was one natch only, that being at the top. In the Casing,
the improvements are in both ends being closed up and pouring the plaster through
an aperture at the top, thereby causing the plaster to run more solid and even. This
is because the case is flat and the plaster runs more solid on the surface, and it also
keeps the top in uniform strength, whereby the mould will last considerably longer.
The old method of making moulds out of Case, previous to this one was by pouring
the plaster through the open top whilst the position of the Chamber was upright
therefore the plaster would not run up solid, on its surface, owing to it being upright.
There must be strong iron hooping embedded in all parts to avoid all swellings of the
plaster.
15
1
COMPLETE SPECIFICATION.
Improvements in or relating to Apparatus for Forming Pottery.
EMANUEL WILCOX, 13 Riley Street North Burslem in the County of Staffordshire
Mould Maker, 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 :-
My Improvements in the "casing" in which the half moulds of chambers, mugs,
sugar basins, circular dishes and similar articles are cast in Plaster of Paris or other
suitable material, consists in forming a second shoulder or "natch" in the outside of
the said mould near the bottom, the "jigger head or jollying pan having a ledge
formed inside thereof near its bottom end for the "natch" or ledge on the outside of
the mould to rest upon.
"
It is well known in the Pottery districts that most of the hollow-ware requiring
moulds, that the said moulds have only one "natch or ledge near the top end which
supports the two halves of the mould, the bottom of the mould resting on the
sloping or slanting sides of the "jigger head," which causes great inconvenience
and loss of time, by the bottom of the mould inclining more to one side than the
other, by reason of the base or bottom of the mould having no.bed or foundation to
rest upon in the "jigger head.""
By this my Invention, the base or bottom of a mould, which is generally in one
piece of plaster, having the configuration of the bottom of a Chamber or other liollow-
ware article, formed on its upper surface, is first placed, or dropped gently into the
jollying pan or "jigger head," finding a seat or bed instantly on the ledge or natch,"
which I form around its inside periphery near the bottom, the two halves are then
placed in the " jigger head"
so as to form a complete mould with the base or bottom,
23
"
and is then ready for use.
By the usual method for making moulds out of "case," the hollow ware was cast
in halves, and the bottom or end in separate "case." In the "case for chamber
pots, one half is cast in a mould, having dowels or projections on the edges where the
two halves meet when placed together in the jollying pan, and the other half in a
mould having holes or recesses in the edges where the two halves meet, for the dowels
Pris 1

page_text: Fig. 10 is a plan view of the "improved case Fig 7 shewing more particularly,
the hole through which the plaster is poured, and the metal strap or band holding the
separate parts of the case together.
Fig. 11. is a sectional elevation of my improved "jigger head" or jollying pan,
having a ledge or "natch" formed around its inside periphery near the bottom, on
which my improved moulded bottom plate, rests as shewn by the dotted lines. Fig. 12
is a vertical section of bottom plate h².
The ordinary case in which moulds are cast is shewn at Figs. 1 and 2 of the
accompanying Drawings, in which a is the semi-circular wall or skin, between which,
and the back plate b, a space c is formed into which semi-liquid Plaster of Paris is
poured, which when sufficiently set, forms one half d of the mould Figs. 3, 4 and 5,
in which chamber pots or other hollow ware pottery is formed in the jollying pan, the
semi-circular wall a and back stand or rest on a bed plate e, and are held tightly
together whilst in use by a strap or band of metal or other suitable material e It
will be seen by referring to Figs. 3. and 4, that each semi-circular half of the mould d
and has a ledge or "natch" near the top extending round same which rests on
the top end or circumference g of the "jigger head' or jollying pan g. Fig. 5,
when placed therein, the circular bottom plate on which the two semi-circular walls
of the mould stand or rest, is cast in one piece in a separate "case." By referring
to Fig. 5 it will be seen that when the bottom circular plate of the mould is
placed in the jigger head" g, it falls towards the bottom thereof, until its cir-
cumferential edge touches the inside conical periphery of the said "jigger head" g',
having no base to rest upon, when the semi-circular halves of the mould are
placed in the said "jigger head" which has a rotary motion imparted to it, and
which motion causes the circumferential edge of the aforesaid circular bottom
plate to break, so causing it to fall or sink lower in the " jigger head," so that
it becomes detached from the two semi-circular parts d and d of the mould, thus
causing great inconvenience, waste of time and material. To obviate these defects,
I will now proceed to describe the advantages to be derived from the use of my
improved case," in which moulds for hollow pottery are cast, and the improved
jigger head."
"
"
Sheet 2, Fig. 6 is a view of my "improved case," in which a is the semi-circular
wall, between which and the back plate b, on which the configuration of the inside of
mould is formed, is a space d, the plate or cover having dowels or projections f³
formed on its under or inside surface, for fitting into corresponding recesses in the
top edges of the semi-circular wall a and back plate b, to keep the said parts a and b
from twisting about; the bottom plate f2 of the case is similarly provided with dowels
to fit into recesses formed in the bottom edges of the said semi-circular wall a, and back
plate . When the several parts forming my "improved case are fitted together,
they are further secured by means of a metal strap e passing around them, the case
is then laid on its back plate b, and is then ready for use, the plaster of Paris in a
semi-liquid condition being poured through a hole or aperture g formed in the semi-
circular wall a of the case. When the plaster of Paris is sufficiently set, the strap e³,
and the various parts a, b, f and f2 forming the case are taken apart, when a semi-
circular wall or female half mould h will be found to be formed in the aforesaid
case." The bottom circular plate * in one piece is cast in a separate "case," and
has as shewn at Fig. 9 a ledge or "natch" i near the bottom.
"
"
55
The said bottom plate h2 when placed or gently dropped into the "jigger head" gi
as shewn at Fig. 11. rests on the ledge or "natch "formed on the inside of the
jigger head
near the bottom, thus keeping the said bottom plate h² in its proper
position, and preventing the same becoming detached from the two semi-circular
halves and of the mould, when the "jigger head" is revolving. The advantages
accruing from my improvements in the case in which plaster of Paris moulds are
formed for hollow or partly hollow pottery ware, those by forming a second ledge, or
"natch"
i, near the bottom ends of the said moulds, and a corresponding
"natch" on the internal periphery of the "jigger head" 9', as shewn on the
accompanying drawings is obvious.
3

page_text: 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 :-
1st. The improved "case" constructed of Plaster of Paris, clay, or other suitable
material, the several parts of which have dowels or projections fitting into corre-
sponding holes or recesses, the whole of which when ready for use are held tightly
together by means of a band of metal e², and inside of which "case," moulds h, h²,
having the outside configuration as shewn at Figs. 8 and 9 on Sheet 2, are cast, in
any suitable material, the top lid, bottom plate, back, and semi-circular shaped wall
forming the said case having a metal band or strap embedded in the plaster or other
material of which the case is made to prevent expansion and contraction of the said
separate parts of which the said case is composed, in the manner and for the purpose
as herein substantially described, set forth and fully illustrated in the drawings
annexed.
"
2. The improved mould, formed by fitting together the semi-circular halves h, h
and the base plate h2, which said circular bottom plate is cast in one piece of plaster,
or other suitable material, in a separate case," the said bottom plate having a
"natch" or ledge formed around same for the purpose herein specified, and shewn at
Figs. 9 and 11 of the accompanying drawings.
3. The improved "jigger head" or jollying pan having a "natch or ledge, formed
on the inside periphery thereof near the bottom, so that the second "natch" i, of the
mould h, hand may rest thereon to support the bottom of the said mould, and
keep the same steady, and intact with the parts h, and ' as herein, substantially
described, set forth, and fully illustrated at Fig. 11 on sheet 2 of the accompanying
drawings.
Dated sou day of October 19.
BILLINGTON & NEWTON,
Per pro J. Newton,
Potteries Patent Agency, Longport, Staffordshire, Agent for Applicant.