IMPROVEMENTS IN BRICK AND TILE MAKING MACHINES
Year: 1876

page_text: LETTERS PATENT to Thomas Buck, the younger, of Cambridge, in the County
of Cambridge, Smith and Machinist, for the Invention of "IMPROVEMENTS IN
BRICK AND TILE MAKING MACHINES."
Sealed the 30th June 1876, and dated the 29th January 1876.
PROVISIONAL SPECIFICATION left by the said Thomas Buck at the Office
of the Commissioners of Patents on the 29th January 1876.
THOMAS BUCK, the younger, of Cambridge, in the County of Cambridge, Smith
and Machinist. "IMPROVEMENTS IN BRICK AND TILE MAKING MACHINES."
This Invention consists in the construction of brick and tile making machines
with a chamber, having an interior door or press plate to which a rocking or to-
and-fro motion is given by means of a peculiar arrangement of mechanisin, as
herein-after described, the said door or press plate in its motion moving forward
the clay, and pressing it towards and through the dies or into the moulds, whereby
bricks and tiles are manufactured in a more simple, expeditious, and economical
manner than hitherto.
In carrying out my Invention, where a pug mill is employed 1 provide a suitable
chamber or box, one end of which is fixed to and is open to the outlet of the pug
mill, and the other end is open to the dies or moulds. Through the chamber or
box, and at or near the centre of one side thereof, passes a spindle or shaft, carrying
a door or press plate; the height of the door is such as to allow it to work freely
between the top and bottom of the chamber, and the side of the chamber opposite
to that of the spindle is made of a curved form concentric with the spindle, so that
the outer edge of the door or press plate in its motion may be in contact or nearly
so with the curved side of the chamber; to the lower end of the spindle (under the
chamber) is fixed a crank jointed to one end of a connecting rod, the other end of
the connecting rod being jointed to a crank fixed to the shaft of the pug mill. By
this arrangement when a certain quantity of clay has been pressed from the mill
into the chamber or box, the door or press plate will be set in motion from the pug
mill shaft, and in moving forward will carry forward with it the clay from the
outlet of the pug mill and inlet of the chamber towards the outlet end of the
chamber, and will press it into and through the dies or into the moulds, as the case
may be. The door or press plate will then be moved back to its starting point
ready to be again moved forward in the manner herein-before described.

page_text: If required the inlet of the chamber may be formed in the middle of the curved
part thereof, the pug mill being placed over the inlet; in this arrangement the dies
or moulds would be placed at each end of the chamber or box, and the door or press
plate would press the clay on either side alternately.
My improvements are applicable to hand machines when the rocking motion of
the door or press plate inay be produced by hand, or by any suitable known
mechanical arrangement, according to the nature of the clay operated on or the
kind of bricks or tiles to be made.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Buck in the Great Seal Patent Office on the 25th July 1876.
THOMAS BUCK, the younger, of Cambridge, in the County of Cambridge, Smith
and Machinist. "IMPROVEMENTS IN BRICK AND TILE MAKING MACHINES."
-
This Invention consists in the construction of brick and tile making machines
with a chamber having an interior door or press plate, to which a rocking or to-
and-fro motion is given by means of a peculiar arrangement of mechanism as
herein-after described, the said door or press plate in its motion moving forward
the clay, and pressing it towards and through the dies or into the moulds, whereby
bricks and tiles are manufactured in a more simple, expeditious, and economical
manner than hitherto.
'J.
In carrying out my Invention where a pug mill is employed I provide a suitable
chamber or box, one end of which-is fixed-to and is open to the outlet of the pug
mill and the other end is open to the dies or moulds. Through the chamber or
box, and at or near the centre of one side thereof, passes a spindle or shaft, carrying
a door or press plate; the height of the door is such as to allow it to work freely
between the top and bottom of the chamber, and the side of the chamber opposite
to that of the spindle is made of a curved form concentric with the spindle, so that
the outer edge of the door or press plate in its motion may be in contact or nearly
so with the curved side of the chamber; to the lower end of the spindle (under
the chamber) is fixed a crank jointed to one end of a connecting rod, the other
end of the connecting rod being jointed to a crank fixed to the shaft of the pug mill.
If required the inlet of the chamber may be formed in the middle of the curved
part thereof, the pug mill being placed over the inlet; in this arrangement the dies
or moulds would be placed at each end of the chamber or box, and the door or
press plate would press the clay on either side alternately.
But to make my Invention better understood I will now proceed to describe the
same by reference to the accompanying Drawing, in which Figure 1 is an elevation
of a vertical pug mill with my improved brick and tile making machine applied
thereto; Figure 2, horizontal section of the same; and Figure 3, horizontal section
of my improved double chamber or machine applied to a vertical mill. Similar
letters in all the Figures represent similar parts.
In Figures 1 and 2, a is a vertical pug mill; b, the chamber or box, the end 61
thereof being fixed to and open to the outlet of the pug mill a, the other end of
the chamber being open to the dies or moulds c; e is the spindle or shaft carrying
the door or press plate f; g is the curved side of the chamber b, concentric with the
spindle e; h is the crank fixed to the lower end of the spindle e, and jointed to one
end of the connecting rod i, the other end of the rod being jointed to the crank j,
fixed to the shaft of the pug mill a; is the press knife for pressing the clay from
the mill a into the chamber b; m is a scraper for preventing the clay from passing
behind the press plate f. The chamber crank h has a long hole p to allow of
adjusting the pin o of the crank h, whereby the stroke of the door or press plate f
may be varied, at the same time varying the size of the chamber inlet; and the
long hole n in the rod i is to allow a longer rest for the press plate f when the clay
is passing into the chamber b.

page_text: The operation of the machine is as follows:-The pug mill a being set in motion
will cause a quantity of clay to be pressed in the chamber or box b, and the door
or press plate f being operated by the pug mill shaft k (by means of the cranks h
and j and connecting rod i) will move forward, and carry forward with it the clay
from the outlet of the pug mill and inlet of the chamber towards the outlet end of
the chamber, and will press it into or through the moulds or dies c, as the case may
be. The door or press plate f will then be moved back to its starting point ready
to be again moved forward, as herein-before described.
Figure 3 is a horizontal section of a double-acting arrangement, the inlet of the
chamber being formed in the curved part g of the chamber b, and the dies or
moulds being fixed at c and c¹; in this arrangement it will be seen that the door
or press plate ƒ would press the clay coming from the mill a on either side alter-
nately.
I have shewn my improvements as arranged to be driven by horse or steam
power, but they are also applicable to hand machines, in which case the rocking
motion of the door or press plate ƒ would be produced by hand or by any suitable
known inechanical arrangement depending upon the nature of the clay to be
operated on or the kind of bricks or tiles to be made.
It will be understood that my improvements are also applicable to horizontally
placed pug mills.
Having thus described the nature of my said Invention, and the best means I
am acquainted with for carrying the same into effect, I wish it to be understood,
that I do not confine myself to the precise details herein laid down and shewn in
the Drawing; but what I do claim is the construction and application to pug mills
of a chamber or box provided with a door or press plate, operated from the pug
mill shaft (or otherwise) for pressing the clay through the dies or into the moulds,
in the manner and for the purposes herein-before described and represented in the
accompanying Drawing.
In witness whereof, I, the said Thomas Buck, have hereto set my hand and
seal, this Twenty-second day of July, in the year of our Lord One thousand
eight hundred and seventy-six.
THOMAS BUCK, JUNIOR.
(L.S.)