IMPROVEMENTS IN DALL AFTER Morrnen Ктоска F MACHINEKI IVA MARING KING BRICKS AND OTHER MOULDED KLOCKS
Year: 1868

page_text: LETTERS PATENT to Cuthbert Greenwood Johnson, of Portrack House,
Stockton-on-Tees, Engineer, for the Invention of "IMPROVEMENTS IN
DALL
AFTER Morrnen Ктоска
F
MACHINEKI IVA MARING
KING BRICKS AND OTHER MOULDED
KLOCKS
Sealed the 2nd February 1869, and dated the 4th August 1868.
PROVISIONAL SPECIFICATION left by the said Cuthbert Greenwood
Johnson at the Office of the Commissioners of Patents, with his
Petition; on the 4th August 1868.
I, CUTHBERT GREENWOOD JOHNSON, of Portrack House, Stockton-on-
Tees, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MACHINERY FOR MAKING BRICKS AND OTHER MOULDED
BLOCKS," to be as follows:-
This Invention has for its object improvements in machinery for
making bricks and other moulded blocks, and consists in employing an
ordinary pug mill (working horizontally or vertically of equal or unequal
diameter throughout its length, and working with knives or blades with
or without the addition of an archimedian screw, and discharging clay,
concrete, coal dust, or other substance required to be moulded into a

page_text: block, brick, or tile) in combination with boxes or moulds set in a
circular or rectangular table revolving or sliding reciprocatingly beneath
a suitable aperture in the pug mill, and fitted with a lid to each box
or mould travelling with the table, the lid being raised by suitable
appliances for the admission of the clay or other substance, and allowed
to fall on the same after it has travelled out from underneath the
aperture before mentioned, the table then slides or revolves until the lid
of the box becomes immediately beneath a fixed roller or block, when
a piston which forms the bottom of the box or mould is actuated by the
incline or cam upon which its face moves and gives such pressure to the
substance as may be required; the table then continues its motion, raises
the lid, and discharges the brick by means of suitably arranged cams or
levers; the brick or tile is then removed by hand, or by suitable
appliances is pushed off the table on to a creeper. In place of adapting
lids to each box or mould, the lids may be dispensed with, and the upper
surface of the brick left smooth by the edges of the aperture in the pug
mill or by other suitable scrapers; pressure may also be applied against
the extended edges of the aperture instead of as before named against
the lid kept down by a suitable block or roller placed for that purpose.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Cuthbert Greenwood Johnson in the Great Seal
Patent Office on the 4th February 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CUTHBERT
GREENWOOD JOHNSON, of Portrack House, Stockton-on-Tees, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of August, 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 me, the said Cuthbert Greenwood Johnson, Her special
licence that I, the said Cuthbert Greenwood Johnson, my executors,
administrators, and assigns, or such others as I, the said Cuthbert
Greenwood Johnson, my 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

page_text: make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Inven-
tion for "IMPROVEMENTS IN MACHINERY FOR MAKING BRICKS AND OTHER MOULDED
BLOCKS," upon the condition (amongst others) that I, the said Cuthbert
Greenwood Johnson, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention,
and in what manner the same 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 I, the said Cuthbert Greenwood Johnson, do
hereby declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement thereof, that is to say :-
This Invention has for its object improvements in machinery for
making bricks and other moulded blocks. For this purpose I employ
a pug mill in combination with boxes or moulds set in a circular or
rectangular table. revolving or sliding reciprocatingly beneath a suitable
aperture in the pug mill, in such manner that the boxes or moulds are
by the movement of the table brought in succession opposite the orifice
of the pug mill, and are from it filled with clay, concrete, coal dust, or
other substance, to be moulded into a block afterwards when the moulds
have been moved past the orifice of the pug mill, the materials in the
moulds are subjected to pressure by a piston which forms the bottom
of the mould, being forced upwards by its lower end coming against an
incline or cam surface, whilst the top of the mould is at this time
covered over with a lid or plate. The bricks or blocks are subsequently-
discharged from the moulds by suitably arranged cams or levers, and
are removed it may be either by hand or by suitable appliances to push,
them off the table on to a creeper.
In carrying out this Invention the details of the abaye described
combination of mechanism may be considerably varied;, but in order
that my Invention may be fully understood and readily carried into
effect I have in the Drawings hereunto annexed. shown two arrange-
ments of machinery so combined.
On Sheet 1 of the Drawings, Figure 1 shows a plan view, and Figure 2,
a side view of a machine constructed in the manner I prefer.

page_text: In this machine the pug mill A is placed horizontally, as shown, and
is fed with clay or other material to be moulded through an opening 6
formed through the side of the casing of the pug mill at one of its ends,
at the opposite end is the exit orifice, and below this orifice is the table c
carrying 6 or it might be other number of moulds suitable for moulding
bricks. The table is carried, as shewn by a central pillar d around
which it is capable of revolving. The piston or plunger which forms
the bottom of each mould has descending from it a rod, which is
attached to it by a screw or socket, or otherwise; at the lower end of this
rod is a roller running on a fixed cam surface e, which is concentrio with
the axis of the revolving table. On the under side of the table, and
near its periphery is formed a toothed wheel f, into which gears. a
toothed pinion g' on the axis g; this axis is driven by toothed gearing
from the axis of the pug mill, as shewn; thus as the axis of the
pug
mill is caused to revolve the table c is revolved also, and the moulds
carried by it are thus in succession brought below the exit orifice of the
pug mill, and are from it fed with material to be moulded into a block;
the moulds after passing below the orifice of the pug mill are for a time
covered over by a fixed plate b, so that no portion of the top of the
mould may be uncovered, whilst any other portion of the top of the
mould is below the exit orifice of the mill, the material in the mould
is thus left with a more or less even surface on its top. As the table
revolves the moulds are brought under a plate k, which is pressed down-
wards by a weighted lever ', as shewn; this plate is relieved from
pressure at the time when the mould commences to pass under it by the
weighted lever heing there held up by a roller at the upper end of
rods which at their lower end carry rollers running on a cam surface
on the top of the table; the outer circumference of the table is at this
spot supported by a roller, as shewn, so that no strain may come upon
the pivot upon which the table revolves, the axis on the weighted
lever is carried by bearings on a bar passing from the top of the
central pivot to a pillar I, which stands up at the side of the table from
the bed of the machine. When the mould is below the plate, and just
before the piston which forms the bottom of the mould is caused to rise
by the cam surface e, the cam surface on the top of the table allows
the lever to again press down the plate k, so that the top of the
mould may be then covered over by the weighted plate, and the amount
of pressure to which the materials in the mould may be subjected will
he limited by the weight on the lever . When the moulds have by

page_text: the revolution of the table been carried past the plate k, the pistons.
which form the bottoms of the moulds are again caused to rise by means
of the cam surface e, and so the moulded block is lifted up out of the
mould, and is then by preference removed by hand. The moulds are
then by the continued revolution of the table again brought under the
exit orifice of the pug mill, and are thus again filled with material, which
is again subjected to pressure and then discharged, as above described.
A similar arrangement of machinery to that shown on Sheet 1 is
shown on Sheet 2 of the Drawings, with this exception, that in the
arrangement shown on Sheet 2 each mould is fitted with a hinged lid,
which as the mould approaches the exit orifice of the pug mill is raised
by a fixed cam surface x concentric with the axis of the table, so that
the mould may be filled with material from such exit orifice; afterwards
the lids are allowed to close, and at the time when the materials in the
mould are being subjected to pressure by the rising of the pistons, which
form the bottom of the moulds, the lids are held down by a roller being
pressed down upon them by a weighted lever, in a similar manner to
the arrangement shewn on Sheet 1, and so the amount of pressure to
which the materials in the mould may be subjected is limited by the
weight on the lever, or the roller may be fixed, the amount of pressure
varied by alteration of the cam beneath the piston.
In witness whereof, I, the said Cuthbert Greenwood Johnson,
have hereunto set my hand and seal, this 30th day of January,
in the year of our Lord One thousand cight hundred and sixty-
nine.