IMPROVEMENTS IN MACHINERY FOR Amwww D MOULDING BRICKS AND OTHER Bloons
Year: 1874

page_text: LETTERS PATENT to William Easton and Frederick Tattersall, both
of the Alexandra Foundry, Kirkstall Road, Leeds, in the County
of York, for the Invention of "IMPROVEMENTS IN MACHINERY FOR
Amwww D
MOULDING BRICKS AND OTHER Bloons.”
PROVISIONAL SPECIFICATION left by the said William Easton and
Frederick Tattersall at the Office of the Commissioners of Patents,
with their Petition, on the 19th January 1874.
We, WILLIAM EASTON and FREDERICK TATTERSALL, both of the
Alexandra Foundry, Kirkstall Road, Leeds, in the County of York, do
hereby declare the nature of the said Invention for “IMPROVEMENTS IN
MACHINERY FOR Moulding Bricks AND OTHER BLOCKS," to be as follows :-
:-
This Invention has for its object improvements in machinery for
moulding bricks and other blocks.

page_text: cavities are closed at the bottom by pistons, and as the table revolves
the moulds are filled in succession from a hopper, beneath which they
pass. After a mould has been filled a cover or pressure plate comes
over it and closes it. This cover or pressure plate then for a time travels
on with the table, and whilst it is doing so it is forced down into the
mould. As the pressure plate descends the bottom piston rises, and so
the brick is exposed to pressure on the two sides simultaneously. After
the pressure has been given the pressure plate is lifted from the mould
and waits for the next mould to come up, when in a similar manner it
presses the brick which this mould contains, and so on continuously.
The pressure plate is caused to operate in the following manner :-
It is connected by an arm with the axis of the table, and when a mould
is beneath the plate a projection on the edge of the table comes against
a finger attached to the arm, and carries the arm round with the table.
Thus the pressure plate is taken beneath a rising and falling ram
receiving its motion from eccentrics, and the ram descends on the
pressure plate as it passes beneath it, and so applies pressure to the
clay in the mould. The faces of the ram and of the pressure plate are
inclined.
The eccentrics are actuated by cam-like projections on the under side
of the table. The pressure plate has catches upon it, which cause it to
engage with the ram as it passes beneath it, and when the ram rises it
lifts the pressure plate and clears its finger from the projection on the
edge of the table. A spring then draws back the pressure plate,
releasing the catches which connect it with the ram, and so the pressure
plate is replaced ready to repeat its movements as the next mould comes
round.
The bottom pistons of the moulds travel round constantly, each with
its own mould; they are supported by a cam surface beneath the table,
which raises them at the time of pressing, and afterwards still further
for the purpose of discharging the moulded brick, which is then removed
from the table. The pistons are at their lowest positions at the times
when the moulds are filled.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Easton and Frederick Tattersall in the
Great Seal Patent Office on the 18th July 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
EASTON and FREDERICK TATTERSALL, both of the Alexandra Foundry,
Kirkstall Road, Leeds, in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of January, in the year
of our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said William Easton and Frederick
Tattersall, Her special license that we, the said William Easton and
Frederick Tattersall, our executors, administrators, and assigns, or such
others as we, the said William Easton and Frederick Tattersall, our
exccutors, 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 “Iм-
PROVEMENTS IN MACHINERY FOR MOULDING BRICKS AND OTHER BLOCKS," upon the
condition (amongst others) that we, the said William Easton and
Frederick Tattersall, executors or administrators, by an instrument
in writing under our, or their hands and seals, or under the hand
and seal of one of us or them, 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 Frederick Tattersall, on behalf of
myself and the said William Easton, 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
moulding bricks and other blocks.
The machine consists of a circular table or disc revolving con-
tinuously and having moulding cavities in its face. The moulding

page_text: cavities are closed at the bottom by pistons, and as the table revolves the
moulds are filled in succession from a hopper, beneath which they pass.
After a mould has been filled a cover or pressure plate comes over it
and closes it. This cover or pressure plate then for a time travels on
with the table, and whilst it is doing so it is forced down into the mould.
As the pressure plate descends the bottom piston rises, and so the brick
is exposed to pressure on the two sides simultaneously. After the
pressure has been given the pressure plate is lifted from the mould and
waits for the next mould to come up, when in a similar manner it
presses the brick which this mould contains, and so on continuously.
The pressure plate is caused to operate in the following manner :-
It is connected by an arm with the axis of the table, and when a mould
is beneath the plate a projection on the edge of the table comes against
a finger attached to the arm and carries the arm round with the table.
The pressure plate is acted upon by a rising and falling ram receiving
its motion from eccentrics. As the ram descends the pressure plate
applies pressure to the clay in the mould.
The eccentrics are actuated by cam-like projections on the under side
of the table. When the ram rises it lifts the pressure plate and clears
its finger from the projection on the edge of the table. A spring then
draws back the pressure plate, and so the pressure plate is replaced,
ready to repeat its movements as the next mould comes, round.
The bottom pistons of the moulds travel round constantly, each with
its own mould; they are supported by a cam surface beneath the table,
which raises them at the time of pressing, and afterward still further
for the purpose of discharging the moulded brick, which is then removed
from the table. The pistons are at their lowest positions at the times
when the moulds are filled.
In the Drawings hereunto annexed we have shewn various views of
a machine constructed as above described.
Figure 1 shews a side elevation, partly in section, of the machine;
Figure 2 is a plan view; and Figure 3 a cross section of the same. In
these Figures a is the circular revolving table, having the moulding
cavities 6 formed in it; c are the pistons which close these moulds at
the bottom, and which are supported by wheels that run upon the fixed
rail or cam d; e is the hopper from which the moulds are filled when
the pistons are in their lowest position; f is the pressure plate or

page_text: plunger for covering over the top of the moulds after they have been
filled. This plunger is carried by the frame g, which is free to move
around the central shaft of the table a; k is a block or ram, upon
which the frame g can slide to and fro, and which is acted upon by
eccentrics 1, the axes of which are mounted in fixed bearings m.
On the axes of the eccentrics are levers n, by which a partial turn
can be given to them; and these by a rod o are connected to one end of
a lever p, which at its opposite end carries a truck to be acted upon by
inclines or cams projecting from the under side of the revolving table a.
The eccentrics in their movement raise or depress the block k, which
carrics with it the frame 9 and pressure plate or plunger f.
The action of the apparatus is as follows:-The table a is driven con-
tinuously by a pinion on the shaft q gearing with teeth formed around
the circumference of the table from the shaft q; motion is also given
to the shaft r, which passes down through the hopper or pug mill e and
carries propelling blades, as shewn. As the moulds arrive in succession
under the pug mill they are filled with clay, and are carried onwards
until they arrive below the plunger f; an inclined projection on the
under side of the table then acts upon the lever p and causes the frame g
and plunger to descend. One or other of the projections & then comes
against a finger t on the frame g, and carries this frame along with it
around the axis of the table a. The frame g and plunger continue to
descend, whilst at the same time the pistons which form the bottoms of
the moulds are caused to rise, and thus the blocks are simultaneously
compressed from the top and bottom. The sliding frame g continues to
travel round with the table a until the eccentrics have depressed it to
its lowest position and the pressure on the brick is completed, at which
time the inclined projection or cam on the under side of the table has
passed beyond the lever p, and the lever being no longer retained by it
is brought back to its former position by the weight u. The frame g is
thereby caused to return at once to its highest position, drawing the
plunger out of the mould; and when the finger t upon the frame I has
been raised clear of the projections & upon the table the frame g is by
means of a spring turned back around the axis of the table to its former
position. As the mould with the brick or block within it is carried on
by the table the bottom piston is caused to rise still further until it has
lifted the brick or block clear of the mould, the brick or block may then
be removed. Afterwards the piston again descends, and when the

page_text: mould again passes below the pug mill it is again filled, and the same
operations are repeated. It will be seen that in the Drawings annexed
the table a is shewn to be formed with eight moulds, but any other
suitable number of moulds may be formed in the table.
Separate views of some of the parts are shown on Sheet 3 of the
Drawings.
Having thus described the nature of our Invention, and the manner
of performing the same, we would state that we are aware that
machinery for moulding bricks has before been made with a revolving
table with moulds formed in it, and closed by pistons at the bottom,
and that such moulds have also been filled at the top from a pug mill
or hopper, and after having been filled have been carried below a fixed
covering plate, by which they have been closed at the top during the
time that the bottom pistons were caused to rise in the mould and
compress the materials in it, we do not therefore make any claim to such
arrangement of machinery, but what we claim is,-
1st. Causing the moulds, after they have been filled from the pug
mill or hopper to pass below a plunger, which is then caused to
travel round with the mould and to descend into it to compress the
brick or block from the top at the same time that it is compressed
from the bottom by the rising piston which forms the bottom of the
mould.
2nd. The combined arrangement of machinery for moulding bricks
and other blocks, substantially as herein described and illustrated in
the Drawings annexed.
In witness whereof, I, the said Frederick Tattersall, have hereunto
set my hand and seal, this Sixteenth day of July, in the year of
our Lord One thousand eight hundred and seventy-four.