IMPROVEMENTS IN APPARATUS FOR MOULDING AND DRYING MOULDS FOR PIPES AND OTHER CYLINDERS, AND IN WITHDRAWING THEM FROM THEIR MOULDS
Year: 1868

page_text: LETTERS PATENT to Charles Markham and William Knighton, of the
Staveley Coal and Iron Works, near Chesterfield, in the County of
Derby, Engineers, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR MOULDING AND DRYING MOULDS FOR PIPES AND OTHER CYLINDERS, AND
IN WITHDRAWING THEM FROM THEIR MOULDS."
Sealed the 27th April 1869, and dated the 13th November 1868.
PROVISIONAL SPECIFICATION left by the said Charles Markham and
William Knighton at the Office of the Commissioners of Patents,
with their Petition, on the 13th November 1868.
We, CHARLES MARKHAM and WILLIAM KNIGHTON, of the Staveley
Coal and Iron Works, near Chesterfield, in the County of Derby,
Engineers, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN APPARATUS FOR MOULDING AND DRYING MOULDS FOR PIPES AND
OTHER CYLINDERS, AND IN WITHDRAWING THEM FROM THEIR MOULDS," to be as
follows:-
This Invention has for its object improvements in apparatus for
moulding and drying moulds for pipes and other cylinders, and in with-

page_text: drawing them from their moulds. For this purpose moulds for pipes
or cylinders are formed in boxes suspended from the outer rim of a
turntable, and when moulded the table is turned to bring them into a
stove which forms about half the circumference of one side of the
circle, and the slide is shut across at either end of the stove between
the suspended pipe boxes, and thereby about half the turntable with
the pipes on the outer rim are enclosed in the stove and the other half
of the turntable remains open to the shop where the moulding process
is carried on; the moulds are thus swung into the stove upon the turn-
table upon which they are moulded. The stove is heated in the usual
way by a fire and a chimney, the fire being put in at the bottom of
the pit outside of the turntable. We have found it to be an advantage
to put two fires to each stove at the extremities near to the slides which
when enclosed form the stove. The turntable is formed with long
gudgeons or centres for the better or easier revolving of the table and
the greater accuracy. In the centre of the pit we fix a footstep to
receive the lower gudgeon, and over the top of the pit we carry a cross
bar to which is cast or bolted a plummer block or pedestal, in this
pedestal or plummer block the top gudgeon of the table revolves; on
'the top of this centre or gudgeon we fix an hydraulic crane, it may
be hand or steam, but we prefer hydraulic; this crane is intended to
draw the pattern moulds and castings, and as the moulds are concentric
with this crane this is very readily done.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Markham and William Knighton in the
Great Seal Patent Office on the 13th May 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, CHARLES
MARKHAM and WILLIAM KNIGHTON, of the Staveley Coal and Iron Works,-
"near Chesterfield, in the County of Derby, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of November, in the year
of our Lord One thousand eight hundred and sixty-eight, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said Charles Markham and William Knighton,

page_text: ference and partially enclosed in a drying stove, such turntable supporting
the boxes whilst the moulds are made dry and poured and by its partial
rotation carrying the moulds into and out of the drying stove as
described.
Also the combining with such apparatus a crane arranged to turn
concentrically with the said turntable as described.
In witness whereof, we, the said Charles Markham William
Knighton, have hereunto set our hands and seals, this Twelfth
day of May, in the year of our Lord One thousand eight
hundred and sixty-nine.
CHARLES MARKHAM. (L.S.)
WILLIAM
KNIGHTON. (L.S.)