IMPROVEMENTS IN MACHINERY FOR PRESSING BRICKS, BRICKETTES, TILES, AND OTHER ARTICLES
Year: 1885

page_text: We, THOMAS CONSTANTINE FAWCETT and JAMES DAWSON FAWCETT of Bur-
mantofts Foundry, Leeds, Yorkshire, Machine Makers, do hereby declare the
nature of our invention for "IMPROVEMENTS IN MACHINERY FOR PRESSING BRICKS,
BRICKETTES, TILES, AND OTHER ARTICLES," to be as follows:-
Our invention has reference to machines employed in pressing bricks, brickettes,
tiles, and other articles whether such machines are actuated by steam power or
manual labour.
Usually the pressing plate has been wound up and down by screws, levers or
cams, but such methods did not satisfactorily perform the work, as there were no
means of determining the exact length of stroke, consequently bricks have been
pressed to unequal thicknesses.
'
To carry out our invention we connect to the pressing plate, the lower end of a
rod, the upper end of such rod being connected by a pin to the end of another rod
hinged at its upper end to the framework.
At the place where these two rods are linked we connect a short arm operated
by a crank in such manner as to oscillate the two rods upon their centres, con-
sequently the pressing plate is caused to slide up and down so as to press upon the
bricks. The lengths of the rods are such that they never get into an exactly
vertical position, but nearly so, and when they do the most pressure is placed upon
the bricks at that time.
By this arrangement the last movement of the pressing plate is very slow, and
the pressure great, but the other part of the stroke is quick and light; this
arrangement also gives the same length of stroke at each operation, consequently
the thickness of the bricks are equal.
Instead of employing rods joined by pins and cotters, the rods may be "toggle"
joined as will be well understood.

page_text: Tiles, and other Articles.
We, THOMAS CONSTANTINE FAWCETT and JAMES DAWSON FAWCETT, of Bur-
mantofts Foundry, Leeds, Yorkshire, Machine Makers do hereby declare the
nature of our invention for "IMPROVEMENTS IN MACHINERY FOR PRESSING. BRICKS,
BRICKETTES, TILES, AND OTHER ARTICLES," and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
ار
Our invention has reference to machines employed in pressing bricks, brickettes,
tiles, and other articles, whether such machines are actuated by steam power or
manual labor. Usually the pressing plate has been operated up and down by
screws, levers or cams, but such methods did not satisfactorily perform the work,
as there were no means of determining the exact length of stroke, consequently
bricks have been pressed to unequal thicknesses.
To carry out our invention we connect to the pressing plate the lower end of
a rod, the upper end of such rod being connected by a pin to the end of another
rod hinged at its upper end to the framework. At the place where these two rods
are linked, we connect a short arm operated by a crank in such manner as to
oscillate the two rods upon their centres, consequently the pressing plate is caused
to slide up and down so as to press upon the brick.
Such being the nature and object of our invention we will now describe the same
more fully, and for that purpose make reference to the accompanying sheet of
drawings wherein Fig. 1 is elevation of a brick pressing machine constructed
according to our invention and Fig. 2 is sectional end elevation of same. A is
framing of the machine, B the table, C the V slide, working vertically between
slides D, and E is the pressing plate for pressing the brick into the mould F. The
mode of operating this pressing plate and giving to it a positive up and down
motion forms the subject of our present invention, which up and down motion we
effect in the following manner. To the slide or other part of the pressing plate E
we attach the bottom end of the rod G, and to some fixed part of the framework
we attach the upper end of another rod H preferably shorter than the rod G, both
of which rods are connected by pin I to a third rod J which is placed on the
crank K caused to rotate by hand wheel or by. power.
It will therefore be seen that as the crank goes around that the rod J will give a
to and fro motion to the rods G and H, consequently the pressing plate E will be
moved up and down thereby at each revolution of the crank shaft, the speed of
which is regulated so as to give time for the introduction and removal of the brick.
It will be observed that the length of the rods G, H, and J, and the mode of con-
necting them together are so arranged that the rods G and H never get into an
exactly vertical line but nearly so, and when they do the most pressure is placed
upon the brick at that particular moment.
By this arrangement the last movement of the pressing plate is very slow and
the pressure great, but the other part of the stroke is quick and light; this

page_text: arrangement also gives the same length of stroke at each operation, consequently
the thickness of the bricks are equal.
Instead of employing rods joined by pins and cotters as shewn in Figs. 1 and 2,
the rods may be "toggle" joined as shewn in Fig. 3, the action and manner of
connection being well understood.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is
Firstly. In brick pressing machines the means or method substantly described
and shewn in Figs. 1 and 2 for operating the pressing plates.
Secondly. In brick pressing machines the employment of "toggle" jointed rods
substantly as herein described and shewn in Fig. 3. for operating the pressing.
plates.