IMPROVEMENTS IN MACHINERY FOR MOULDING OR SHAPING CLAY AND OTHER PLASTIC SUBSTANCES FOR DRAINING AND OTHER PURPOSES
Year: 1844

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
BAILEY DENTON, of Gray's Inn Square, in the County of Middlesex, Land Agent,
send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Eighteenth day of April, in the seventh year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said John
Bailey Denton, Her especial licence, full power, sole privilege and authority, that
İ, the said John Bailey Denton, my exors, admors, and assigns, or such others
as I, the said John Bailey Denton, my exors, admors, or assigns, should at any
time agree with, and no others, from time to time and at all times during the term
of years therein expressed, should and lawfully might make, use, exercise, and
vend, within England, Wales, and the Town of Berwick-upon-Tweed, my
Invention of "IMPROVEMENTS IN MACHINERY FOR MOULDING OR SHAPING CLAY AND
OTHER PLASTIC SUBSTANCES FOR DRAINING AND OTHER PURPOSES;" in which said
Letters Petent is contained a proviso that I, the said John Bailey Denton,
shall cause a particular description of the nature of my said Invention, and in
what manner the same is to be performed, to be inrolled in Her said Majesty's
High Court of Chancery within six calendar months next and immediately
after the date of the said in part recited Letters Patent, as in and by the
same, reference being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said John
Bailey Denton, do hereby declare that the nature of my said Invention, and the

page_text: manner in which the same is to be performed, are fully described and ascer-
tained in and by the following description thereof, reference being had to the
Drawing hereunto annexed, and to the figures and letters marked thereon, that
is to say:
My Invention has for its object a mode of combining the use of two screws
whereby they simultaneously act to press clay or other plastic matter, either
directly through suitable moulding orifices, or into a chamber or chambers
from which the clay or other plastic matter is forced through suitable orifices
by other apparatus. And in order that the invention may be fully understood
and readily carried into effect, I will proceed to explain the means practised
by me.
DESCRIPTION OF THE DRAWING.
This machine consists of a cast-iron cylinder or box A, divided into two
equal longitudinal compartments of such dimensions as may be requisite, and
secured upon a framework B, B, B, B, having a piston C accurately fitted
into each compartment, and attached to the rods D, D, which are worked
horizontally and alternately by a double crank E, and the connecting rods
F, F. Upon the top of this cylinder or box is fitted a square or circular cast
iron case G, in which are placed vertically or otherwise a pair of screws (shown
by dotted lines on the accompanying plan), and turned from the end of the
crank shaft E by means of bevil and spur wheels H and I. In the front of
these screws an opening or hopper K is left in the case G, into which the
clay or other material is put, and which being drawn in and pugged or mixed,
is by the continuous action of the screws carried and pressed downwards into
the cylinder or box A, in time to be acted upon by the alternate stroke and
pressure of each piston C, C, and expressed thereby into the shape required
through the front or die plate L, and received therefrom either by a plain flat
board M, or other suitable means. The front or die plates are screwed to the
cylinder or box A, so as to be removeable at convenience, in order that a
separate die plate, corresponding in shape to the article required to be made,
may be put on, whether tile, pipe, brick, or otherwise. The machine is placed
upon four wheels attached to the bottom of the frame, so as to be easily move-
able from place to place as required for convenience of operation. It is appli-
cable either to manual or horse, water, steam, or other power.
It will thus be seen that the screws are in opposite directions on the two
screw shafts, and those shafts revolve in opposite direction by which the com-
bined action of the two screws will be constantly mixing and forcing down the
clay or other plastic material, and if the moulding orifices were in a line with
the axes of the screws, they alone would force out continuous pipes, tiles, or

page_text: other articles, according to the nature of the moulding orifices used, and the
same would be cut off into lengths by any suitable apparatus, as is well under-
stood when forcing like articles through moulding orifices. I have not there-
fore thought it necessary to show the cutting off apparatus, as the same forms
no part of my invention. But I prefer that the combined action of the screws
should be employed to be continuously filling a divided chamber, within which
pistons work, as above explained.
Having thus described the nature of my Invention, and the best means I am
acquainted with for performing the same, I would have it understood that I
do not confine myself to the precise details herein described, provided the
peculiar character of the Invention be retained. But what I claim is the
mode of combining the action of two screws to force clay or other such material
through moulding orifices and into compartments from which it is forced by
other apparatus, as above described.
In witness whereof, I, the said John Bailey Denton, have hereunto set
my hand and seal, this Eighteenth day of October, in the year of our
Lord One thousand eight hundred and forty-four.
J. BAILEY (L.S.) DENTON.
AND BE IT REMEMBERED, that on the Eighteenth day of October, in
the year of our Lord 1844, the aforesaid John Bailey Denton came before our
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