IMPROVEMENTS IN BRICKMAKING MACHINEDY
Year: 1877

page_text: LETTERS PATENT to Thomas Constantine Fawcett, of Leeds, in the County of
York, Engineer, for the Invention of "IMPROVEMENTS IN BRICKMAKING
MACHINEDY"
Sealed the 10th August, 1877, and dated the 14th February 1877.
PROVISIONAL SPECIFICATION left by the said Thomas Constantine Fawcett,
at the Office of the Commissioners of Patents on the 14th February 1877.
THOMAS CONSTANTINE FAWCETT, of Leeds, in the County of York, Engineer.
"IMPROVEMENTS IN BRICKMAKING MACHINERY."
"
This Invention consists in combining an ordinary brickmaking machine with a
pug mill constructed in such manner that the pressure upon the die table or
cylinder shall be reduced at the time the same is in motion. The opening through
which the clay is forced from pug "mill" into the dies is at right angles to the
axis of the mill; and on the shaft opposite to the opening is a wiper or blade,
which, as it revolves, presses the clay through the opening, and also wipes or clears
away the remaining clay from the opening sufficiently to remove all pressure upon
the dies whilst they are moving. This arrangement of pug mill admits of the use of
two die tables or cylinders in combination with one mill, or I may employ one die
table or cylinder, and on the other side of the mill have a suitably shaped orifice
through which the clay may be forced and cut into bricks by wires.
My Invention also consists in the use of a stationary cam inside the die cylinder for
the purpose of preventing the bottom of the die from receding too far into the
cylinder during the feed, but so arranged that when the cylinder has partially re-
volved, and the die is under the "presser," the bottom then falls into its seat and
allows the presser block to enter the die or mould.

page_text: "
This Invention consists in combining an ordinary brickmaking machine with a
pug mill" constructed in such manner that the pressure upon the die table or
cylinder shall be reduced at the time the same is in motion. The opening through
which the clay is forced from the "mill" into tho dies is at right angles to the
axis of the "mill;" and on the shaft opposite to the opening is a "wiper" or blade,
which, as it revolves, presses the clay through the opening, and also wipes or clears
away the remaining clay from the opening sufficiently to remove all pressure upon
the dies whilst they are moving. This arrangement of "pug mill" admits of the use
of two die tables or cylinders in combination with one mill, or I may employ one die
table or cylinder, and on the other side of the mill have a suitably shaped orifice
through which the clay may be forced and cut into bricks by wires.
My Invention also consists in the use of a stationary cam' inside the die cylinder for
the purpose of preventing the bottom of the die from receding too far into the
cylinder during the "feed," but so arranged that when the cylinder has partially re-
volved, and the die is under the "presser," the bottom then falls into its seat and
allows the presser block to enter the die or mould..
In order that my Invention may be more fully understood, I herein give reference
to the accompanying Sheet of Drawings illustrative thereof.
春老
Fig. 1 is a plan view of brickmaking machine, and Fig. 2 a sectional clevation of
Fig. 1, taken through the line A B. C is the die cylinder, having ordinary moveable
bottoms D. E is the ordinary presser. The clay is fed to the die, cylinder by the
pug mill" F, the shaft of which carries the usual blades G, and in addition thereto
a"wiper "H, which, as it revolves, presses the clay into the open die; and then scrapes
or "wipes" the superfluous clay from the front of the die, creating for a moment an
empty space, and thus removing all pressure from the die cylinder whilst it is in
motion.
"6
Pug mills" thus constructed and arranged may feed two die tables or cylinders,
as it will be readily seen that a second die table or cylinder might be placed opposite
the outlet J; or I may employ one die table or cylinder, and on the other side of the
mill I may have a suitably shaped orifice through which the clay may be forced or
cut into bricks by wires.
In the accompanying Drawings, the "pug mill" is shewn in a horizontal position,
but it may, if desired, be placed vertically. K is a stationary cam inside the die
cylinder for preventing the bottoms D from receding too far inwards during the
feed," but so shaped that when the cylinder has partially revolved, and the die is
under the "presser," the bottom, then falls into its seat and allows the presser block
to enter the die or mould.
"
Having thus described the nature of this my Invention, and shewn by Drawings
how the same is to be carried into effect, I would have it understood that I do not
confine myself to the precise details of construction or arrangement, as the same may
be varied without departing from the main features of the Invention, but what I
consider to be new, and therefore claim as my Invention is,―
Firstly. The use of the "wiper" H for removing the pressure from the die
cylinder or table, when the same is in motion, or any similar mechanical equi-
valent.
Secondly. The use of the cam K, as and for the purpose herein shewn and
described.
Thirdly. The construction and use of a "pug mill" having two outlets, substantially
as herein shewn and described.
In witness whereof, I, the said Thomas Constantine Fawcett, have hereunto set
my hand and seal, this Eleventh day of August, in the Year of our Lord
One thousand eight hundred and seventy-seven.