IMPROVEMENTS IN MOULDING
Year: 1862

page_text: LETTERS PATENT to Thomas 'Sagar, of Burnley, in the County of
Lancaster, Machinist, and John Rocliff, of the same Place, Moulder, for
the Ton of 16 TunaMOLDING."
PROVISIONAL SPECIFICATION left by the said Thomas Sagar and
John Rocliff at the Office of the Commissioners of Patents, with
their Petition, on the 26th July 1862.
We, THOMAS SAGAR, of Burnley, in the County of Lancaster, Machinist,
and JOHN ROCLIFF, of the same Place, Moulder, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN MOULDING," to be as follows:-
Our Invention is applicable to that description of moulding known as plate
moulding, and it consists in certain improvements in the mode of constructing
the parting plates for producing the moulds requisite in casting iron, brass, and
other metals.
It has heretofore been customary in plate moulding to cast the pattern and
plate together; now according to our improvements the pattern or patterns
are made separate from the parting plate, and either used separately, or in
some cases the patterns are attached to it. In moulding wheels for instance,
the plate is so shaped that the spokes with part of the boss and the flat part of
the rim are on one side, and the other side is provided with recesses for the
spokes of the wheel and with runners for the metal. In using such a plate, a
box in two halves is employed, the plate being between the parting of the box;

page_text: the pattern of the wheel to be moulded is then laid on, the plate being guided
by the recesses for the spokes; the sand is then rammed in round the pattern,
and the box is turned over; the sand is then rammed into the other half of the
box, and when complete the two parts of the boxes are separated and the plate
is removed; the pattern is then lifted out of the sand, and the two halves of
the box are again put together, thus forming the mould in which the molten
metal is run in the usual manner. When the patterns are fixed to one side
of the parting plate, they are of course lifted out of the sand with the plate,
and as the back of the plate is of the shape of the inside of the pattern
required, the boxes when put together form the mould.
The object of our Invention is to facilitate the construction of the parting
plates, and to economise time in moulding. The details may be considerably
varied, and the Invention is particularly advantageous in preparing the moulds
for castings of which many pieces are required.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Sagar and John Recliff in the Great Seal Patent
Office on the 13th January 1869.
TO ALL TO WHOM THESE.PRESENTS SHALL COME, we, THOMAS
SAGAR, of Burnley, in the County of Lancaster, Machinist, and JOHN ROCLIFF,
of the same Place, Moulder, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of July, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Thomas Sagar and John Rocliff, Her special license, that we, the
said Thomas Sagar and John Rocliff, our executors, administrators, and
assigns, or such others as we, the said Thomas Sagar and John Rocliff, our
executors, administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands, and Isle
of Man, an Invention for "IMPROVEMENTS IN MOULDING," upon the condition
(amongst others) that we, the said Thomas Sagar and John Rocliff, our
executors or administrators, by an instrument in writing under our, or their,
or one of our or their hands and seals, should particularly describe and
ascertain the nature of the said Iuvenition, and in what manner the same

page_text: was to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that we, the said Thomas Sagar and John Rocliff, do
hereby declare the nature of our said Invention, and in what manner the
same is to. be performed, to be particularly described and ascertained in and
by the following statement (that is to say):-.
Our Invention is applicable to that description of moulding known as plate
moulding, and it consists in certain improvements in the mode of constructing
the parting plates for producing the moulds requisite in casting iron, brass,
and other metals.
And in order that our Invention may be fully understood and readily carried
into operation, we will proceed to describe the accompanying Sheet of
Drawings, reference being had to the figures and letters marked thereon.
:
Fig. 1 is a plan of a parting.plate for moulding a toothed wheel according
to our improvements; Fig. 2 is a section of the same through the line A, B,
in Fig. 1, and of the wheel pattern shewn in dotted lines; Fig. 3 is another
plan of the same plate taken from the reverse side; Fig. 4 is a section
through the parting plate, the wheel pattern, and the lower part of the moulding
box; Fig. 5 is a section through the parting plate, the wheel pattern, and
both halves of the moulding box; and Fig. 6 is a section through the moulding
box, with the parting plate and pattern removed.
.
a is the parting plate, which is suitable for moulding toothed wheels having
any
other suitablo
five arms or spokes; the parting plate is made of metal or of
material. In Fig. 1, the recesses marked b, b, correspond to the spokes of
the pattern to be moulded, and in Fig. 8, the projecting parts b', 6', are also
of the shape of the spokes; the boss and the inner diameter of the rim of the
wheel are also produced in recess in Fig. 1, and in relief in Fig. 8. The
projections c, c, in Figs. 1 and 2, are for the gits or runners. When using
our improved parting plates as above described for moulding wheels, the plate a
is placed between the boxes e and f, with the wheel pattern d upon it, the
position of the wheel pattern being determined by the recesses in the face of
the plate, and the two are held in position by pins a¹ passing through the snugs
of the moulding box, and through the holes a' in the plate a; the sand is then
5 rammed in round the pattern in the usual manner, as shewn by the dotted
lines in Fig. 4; after this is completed the moulding boxes e and fare turned
over, as shewn in Fig. 5, the whole being held together by the pins a¹; the
sand is then rammed into the upper half ƒ of the moulding box, and the git
hole g is prepared in the usual manner. The two parts of the moulding box

page_text: manner.
are now ready to be separated, and when the top box is lifted off the plate a
is removed; the moulder then lifts the wheel pattern out of the sand, after
which the two halves of the moulding box are put together, as shewn in Fig. 6,
thus completing the mould, into which the molten métal is run in the usual
It may in some cases bo preferable to fix or attach the pattern to
the parting plate instead of using them separato as above described. When the
patterns are fixed to one side of the parting plate, they are of course lifted out
of the sand with the plate, and as the back of the plate is of the shape of the
inside of the pattern required the boxes when put together form the mould.
Fig. 7 is a section of a treading tappet pattern, as rammed up in the
moulding box h, i, ready for withdrawing from the sand; ; is the parting plato
with the impression of the tappet pattern k on the top side, and the bottom
side fitting the pattern; 1 is the runner, and m, m, the core prints.
'
Figs. 8 and 9 are respectively the side view and plan of a casting from the
pattern k. Fig. 10 is a plate with a bent lever pattern. n is the plate, the 1
top side of which is of the same shape as the top side of the lever o, and the
bottom side of the plate has the lever o imbedded into it, which may either be
used loose or fastened to the plate n; o', o³, Fig. 11, are a side view and plan
of a casting from the plate n and pattern o.
The object of our Invention is the improved construction of the parting 2
plates, whereby time is economised in moulding. The details may be con-
siderably varied, and the Invention is particularly advantageous in preparing
the moulds for castings, of which many are required.
Having thus stated the nature of our Invention, and described á convenient
mode of carrying the same into operation, we declare that we claim as our 2
improvements in moulding, the improved parting plates described, one side
of which has recesses to retain the pattern, or to one side of which the
pattern is attached, and the other side of which is formed with-a portion of
the pattern in relief.
In witness whereof, we, the said Thomas Sagar and John Rocliff, have 8
hereunto set our hands and seals, this Ninth day of January, in the
year of our Lord One thousand eight hundred and sixty-three.